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Combination Generator Control Module User Manual

1. ABB C06 5 6 7 8 91 2 3 4 5 6 78910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 T 10 9 E vw 8 m 7 Zz 6 O 5 D O 1 4 77 A 3 Z L 9 9 1 2 80 F 7 0 6 0 i 5 0 9 4 0 8 7 3 0 6 5 2 0 4 3 1 0 2 0 5 J 09 08 07 06 05 04 03 02 01 5 6 7 8 91 2 3 4 5 6 78910 20 30 40 50 60 D1089 09 ULTIPLES OF PICK UP Rockwell Automation Publication 1407 UM001H EN P November 2014 177 Appendix Time Over current Characteristic Curves Figure 48 Time Characteristic Curve M Moderately Inverse 99 1372 similar to ABB CO 7 5 6 7 8 91 2 3 4 5 6 78910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 80 70 60 50 40 30 20 aono gt G N SECONDS TIME OF Doo O 00000 3 0 gt wo oONwMoOL 2 0 0 5 02 01 5 6 7 8 91 2 3 4 5 6 78910 20
2. gt 0Om IN SECONDS TIME vu oN MOL DO Fe COT SIOKOLO Oo Oo oooGO0NM N o 0 5 02 01 5 6 7 8 91 3 4 5 6 78910 20 30 40 50602 2 D2S07504 MULTIPLES OF PICK UP 180 Rockwell Automation Publication 1407 UM001H EN P November 2014 Time Over current Characteristic Curves Appendix A Figure 51 Time Characteristic Curve V V1 Very Inverse 99 1374 similar to ABB CO 9 5 6 7 8 91 2 3 4 5 678910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 e a onoo N SECONDS TIME gt oa aNvVov lt 08 0 5 02 01 S 6 7 8 91 2 3 4 5 678910 20 30 40 50 60 D1090 03 MULTIPLES OF PICK UP Rockwell Automation Publication 1407 UM001H EN P November 2014 181 Appendix Time Over current Characteristic Curves Figure 52 Time Characteristic Curve V2 Very Inverse 99 1596 similar to GE IA
3. 01 5 6 7 8 91 2 3 4 5 678910 20 30 40 50 60 er MULTIPLES OF PICK UP Rockwell Automation Publication 1407 UM001H EN P November 2014 183 Appendix Time Over current Characteristic Curves Figure 54 Time Characteristic Curve E2 Extremely Inverse 99 1598 similar to GE IAC 77 5 6 7 8 91 2 3 4 5 678910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 A a AyNeoo N SECONDS TIME BR oO oNnowoon ae a O E O gt N ARJONA uO 000000000 01 5 67891 2 3 4 5 678910 20 30 40 50 60 02307 08 ULTIPLES OF PICK UP 184 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Time Over current Characteristic Curves Appendix A Figure 55 Time Characteristic Curve A Standard Inverse 99 1621 0 50 6 08 1 0 2 3 4 5 6 78910 20 30 40 50 60 1000 900 800 700 600 500 300 200 20 A a ayNevo gt Orm
4. N SECONDS TIME CISION Oo O 000000 gt um oNoor i o 0 5 02 01 0 50 6 08 1 0 2 3 4 5 6 78910 20 30 40 50 60 2570 06 MULTIPLES OF PICK UP SETTING Rockwell Automation Publication 1407 UM001H EN P November 2014 185 Appendix Time Over current Characteristic Curves Figure 56 Time Characteristic Curve B Very Inverse 99 1376 5 6 7 8 9 1 2 3 4 5 678910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 10 9 v 8 G 7 Z 6 O 5 O L 4 Y 3 T 1 2 M E i D 9 l 8 7 A 5 4 9 9 3 9 0 8 0 7 0 5 6 0 5 0 4 0 3 0 al 09 2 0 08 07 06 1 0 05 04 0 5 03 02 01 5 6 7 8 9 1 2 3 4 5 678910 20 30 40 50 60 D1089 07 MULTIPLES OF PICK UP 186 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Time Over current Characteristic Curves Appendix A Figure 57 Time Characteristic Curve C Extremely Inve
5. Rockwell Automation Publication 1407 UM001H EN P November 2014 139 Chapter 6 Table 10 Output scheduled write Data Table Assembly Instance 1 CGCM Unit Software Interface Byte Size Type Bits Tag Name Description Units Range Bytes 5 1 Boo 0 Spare9 Boo 1 Spare10 Boo 2 Spare11 Boo 3 Spare12 Boo 4 KVAR LS BridgeEn KVAR Load Share Bridge Enable 0 Disabled Bool 5 KVAR IS En KVAR Load Share Enable FR Boo 6 KW LS BridgeEn kW Load Share Bridge Enable Boo 7 KW LS En kW Load Share Enable 6 1 Boo 0 7 Spare13 20 7 1 Boo 0 27 Spare21 28 8 4 Rea N A AVRSetpt Automatic Voltage Regulator Volts 85 30 000 Setpoint 12 4 Rea N A FCRSetpt Field Current Regulator Setpoint Adc 0 15 16 4 Rea N A PFSetpt Power Factor Setpoint PF 0 5 0 5 20 4 Rea N A VARSetpt VAR Setpoint VARS 1E 07 1E 07 24 4 Real N A WLSOutV kW Load Share Output Voltage Volts 28 4 Rea N A WaAnalogTargetPUValue kW Analog Target Value Per Unit 32 4 Real N A WDigitalTargetPUValue kW Digital Target Value Per Unit 36 4 Rea N A VAR_LS_OutV KVAR Load Share Output Voltage Volts 40 4 Rea N A VARAnalog largetPUValue a Analog Target Value Per ni 44 4 Rea N A VARDigitalTargetPUValue nae Digital Target Value Per ni 48 4 Rea N A Spare13 52 4 Rea N A Spare14 Unscheduled Read Data Table The Unscheduled Read data table contains metering and other non time critical s
6. Generator Frequency Phase Match Error Bus Voltage Phase Angle in Degrees Generator Voltage Phase Angle in Degrees Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 Synchronizing Control Software Interface When synchronization is active the CGCM unit adjusts the values of the Scheduled Read table tags as described below e Voltage Match Error as computed above Frequency Match Error as computed above e Phase Match Error as computed above Voltage Raise and Lower tags which are set when the voltage match error is above or below respectively the voltage acceptance window as defined by the configured synchronizing voltage high and low limits e Frequency Raise and Lower tags which are set when the frequency match error is above or below respectively the frequency acceptance window as defined by the configured synchronizing frequency high and low limits e Phase Raise and Lower tags which are set when the phase match error is above or below respectively the phase acceptance window as defined by the configured synchronizing phase high and low limits e The applicable Close Breaker tag which is set when the voltage match error frequency match error and phase match error have all remained continuously within their respective acceptance windows for the configured acceptance window delay time Real power Load Sharing The real power load sharing function lets two or more CG
7. See Metering trouble shooting Corrective Action Correct as required CT or input impedance mismatch Verify CT selection and measure input impedance to each AVR Correct or replace CTs as required Add resistors as required to match AVR input resistance VARs do not share at all and when a voltage adjust is made nothing happens 158 Cross current mode is not enabled selected Check Droop_CCCT_Select tag and kVAR_LS En tag If not active check correct logic for mode selection Gain misadjustment Check CCCT Gain Correct as required Wiring error Measure voltage at ID terminal and adjust reactive power voltage Rockwell Automation Publication 1407 UM001H EN P November 2014 Correct wiring as required if voltage signal from CCCT circuit is not observed Troubleshooting Chapter 7 Table 24 Compensation Modes Cross Current Symptom VARs do not share at all and when a voltage adjust is made reactive power transfers to from the Most Likely Cause Cross current mode is not enabled selected Diagnostic Action Check Droop GCCT Select tag Corrective Action If not active check correct logic for mode selection machine Wiring error Measure voltage at ID terminal and adjust reactive power voltage Correct wiring as required if voltage signal from CCCT circuit is not observed Gain mis adjustment Check CCCT Gain Correct as required VA
8. 2 S Scheduled U Unscheduled W Write R Read CGCM Unit User Program Interface 128 The CGCM unit and the ControlLogix controller transfer data through five controller tags based on the module defined data types listed in the Summary of Data Tables When the CGCM unit is added into the RSLogix 5000 software project RSLogix 5000 software creates the five module defined data types In addition four controller tags are created by using these data types e CGCM Module Name C the Configuration tag e CGCM Module Name C UnschWrite the Unscheduled Write tag e CGCM Module Name O the Output or Scheduled Write tag e CGCM Module Name l I the Input or Scheduled Read tag When the Configuration tag is created a set of default values are assigned These default values do not always reflect the configuration parameters necessary for operation of your application Refer to Chapter 4 for information on configuring the CGCM unit with the RSLogix 5000 software module configuration dialog boxes Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Software Interface Chapter 6 In addition to the module configuration interface the data in the Configuration and Unscheduled Write tags can be accessed by reading and writing elements of the tags in the user program IMPORTANT RSLogix 5000 software performs data range checks on configuration data entered into the module configuration screens This does n
9. BusB_PhOffset This tag configures a phase angle added to the measured bus B phase angle It is used to compensate for phase shift across sensing transformers BusB_V_Scaler This tag configures a multiplier by which the measured bus B voltage is multiplied It is used to compensate for ratio error across sensing transformers BusA B Select This tag selects which reference bus the CGCM unit attempts to synchronize to V Match Gain This tag sets the Proportional Gain parameter for Voltage Matching mode Synchronizing Outputs from the CGCM Unit SyncDeadBus This tag indicates all conditions have been to allow a DeadBus synchronization AutoSync This tag follows the AutoSyncEn tag setting in the Scheduled Write tag CheckSync This tag follows the CheckSyncEn tag setting in the Scheduled Write tag PermissiveSync This tag follows the PermissiveSyncEn tag setting in the Scheduled Write tag SyncFailure This tag indicates that the synchronization attempt failed UndefinedSyncMode This tag indicates that a synchronization was initiated when none of the synchronization modes were asserted SyncModeConflict This tag indicates that more than one Synchronization mode was selected BusRot_ABC_ACB This tag reports the rotation sequence of the reference bus in three phase metering In single phase metering these bits reflect the configuration value GenRot ABC ACB This tag reports the rotation sequence of the gen
10. Correct wiring as required Gain mis adjusted Check gains entered into CGCM unit configuration Calculate adjust as required Excitation limiting active Check UEL active input Correct UEL configuration or change operating point Droop compensation is driving up the voltage Check Droop Enable Adjust disable droop compensation Voltage is erratic or unstable 156 Gain mis adjusted Check gains entered into CGCM unit configuration Calculate adjust as required Wiring error Check wiring for excitation current output VT inputs fuses open grounding and PMG supply Correct wiring as required Prime mover is unstable Check prime mover governor operation Correct as required Excitation limiting active Check UEL OEL active input Rockwell Automation Publication 1407 UM001H EN P November 2014 Correct UEL OEL configuration or change operating point Troubleshooting Chapter 7 Table 21 Reactive Power Control PF Symptom Power Factor not at PF setpoint Most Likely Cause PF not enabled Diagnostic Action Check input tag PF Ened Corrective Action If not enabled select appropriate modes of operation to enable PF mode Gain misadjusted Observe response of PF to changes in PF setpoint If a response is slow increase gain Diode failure Use diode monitor if previously configured or measure check diodes Replace as required
11. Generator decrement curves e Contact the generator manufacturer for this information Rockwell Automation Publication 1407 UM001H EN P November 2014 237 Appendix F Configuration Record Worksheet CGCM Unit Configuration Settings Table 46 Generator Tab Parameter Units Setting Rated frequency Hz Rated voltage VAC Rated current AAC Rated power kW Rated field voltage VDC Rated field current ADC Table 47 Transformers Tab Parameter Units Setting Generator VT configuration N A Generator VT primary voltage VAC Generator VT secondary voltage VAC Bus VT configuration N A Bus A VT primary voltage VAC Bus A VT secondary voltage VAC Bus B VT primary voltage VAC Bus B VT secondary voltage VAC Metering CT primary current AAC Metering CT secondary current AAC Cross Current CT primary current AAC Cross Current CT secondary current AAC 238 Rockwell Automation Publication 1407 UM001H EN P November 2014 Table 48 Excitation Tab Configuration Record Worksheet Appendix F Parameter units Setting Ss s S Soft start initial voltage Soft start time s Excitation select PMG or shunt PMG phase select Single or three Loss of excitation current setpoint ADC Loss of excitation current delay s Rotating diode fault open diode level ripple Rotating diode fault delay s Rotating diode fault shorted diode lev
12. Level 0 0 20 A de TIME IN SECONDS 240 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Configuration Record Worksheet Appendix F Table 51 Under excitation Limiting UEL Tab Parameter Units Setting UEL Curve kW point 1 kW UEL Curve kW point 2 UEL Curve kW point 3 UEL Curve kW point 4 UEL Curve kW point 5 UEL Curve kvar point 1 kvar UEL Curve kvar point 2 UEL Curve kvar point 3 UEL Curve kvar point 4 UEL Curve kvar point 5 Figure 73 Typical UEL Limiting Curve Real Power Generate W x 1000 0 0 7 5k 15 0k 22 5k 30 0k 37 5k 45 0k 0 0 o 8 z 2 5k gt gt 50k 5 7 5k 5 10 0k ad 2 8 125k 15 0k Rockwell Automation Publication 1407 UM001H EN P November 2014 241 Appendix F Configuration Record Worksheet Table 52 Gain Tab Parameter Power factor integral gain Ki Setting Power factor overall gain Kg Var integral gain Ki Var overall gain Kg OEL integral gain Ki OEL proportional gain Kg UEL integral gain Ki UEL proportional gain Kg AVR control proportional gain Kp AVR control integral gain Ki AVR control derivative gain Kd Time constant Td FCR overall gain Kg AVR control overall gain Kg AVR control voltage matching gain AVR FCR control auxiliary gain
13. Limit defines the maximum per unit load share error reported to the host controller Rate defines the maximum change in the load share error per CGCM unit update cycle expressed in percent of rated kilowatts per second For example if a change of load of 50 is required and the rate set for 10 per second the change takes 5 seconds to complete The CGCM unit has an internal relay that isolates the load share circuit whenever the function is not active or when control power is not present IMPORTANT Series B units do not isolate when control power is lost An external relay must be used Metering The CGCM unit provides true RMS metering based on voltage and current samples obtained from the current and voltage inputs All monitored parameters are derived from these values Accuracy is specified as a percentage of full scale at 25 C 77 F across the frequency range of the controller at unity power factor Metered parameters are communicated to the host Logix programmable controller via the Unscheduled Read table The Metered Parameter Accuracy table lists all metered parameters and their accuracy 3 phase generator side metering is independent of the Synchronization mode in one or two breaker schemes In the two breaker scheme single phase bus side metering is provided only for the selected bus Refer to the Specifications Appendix D for information on metering accuracy Refer to Power System Sign Conventions on pa
14. PF Mode Setpoint VARs Excitation Current PF Mode Internal Tracking Setpoint Measured PF PF Mode Traverse Rate Determines Transition to New Mode s Operating Point PF is New Process Variable So 7 x VAR Internal VARs are Old Process i Tracking Setpoint Variable S FCR Internal Tracking Setpoint VAR Mode PF Mode Related Parameters Internal tracking GenRatedExcI Traverse rates GenRated_V GenRated_I GenRatedExcI Rockwell Automation Publication 1407 UM001H EN P November 2014 95 Chapter4 CGCM Unit Configuration Synch Tab The Synch tab is used to configure the unit s parameters related to the synchronizing function of the CGCM unit ia Module Properties Report CNBR 1407 CGCM 4 1 x Voltage Current Frequency Power UEL OEL Fault Relay General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking Load Share Synch Synchronization Limits Bus A Offsets Rotation Generator frequency Meet Voltage Multiplier 1 0 Lower Limit 0 1 Hz ABC Phase 0 0 deg Upper Limit 01 Hz ACE Voltage Match Bus B Offsets Bus Lower Limit 50 lt e EY Q ABC Upper Limit 5 0 Voltage Multiplier 00 ACB Phase Match Phase i deg Lower Limit 10 0 deg Upper Limit 10 0 deg Acceptance Delay 0 0 sec Dead Bus Limits Min Frequency 59 950001 Hz Min Voltage 460 0 Volts Max Freque
15. Troubleshooting Time Over current Characteristic Curves Table of Contents Preface Additional Resources 0 c cece ee cece cece eet eeeeeeeeenneeeaae 7 Chapter 1 Introduction Lune er rererere 9 Functions 122 AAGE SL et oh ate dane dente ENE 9 Chapter 2 Mounting Requirements snips se isncces enter ey ve sen 13 Electrical Connections 0 c cece cece cece eee eeeeeeeeaaeeaes 15 Chapter 3 lnputsand Outputs a onde se sates siaa ordensvesen 38 C mmunicationvsaraduatdurarurada rear sd Pk 42 Operational Functions susan sete ea et eee eet 43 Chapter 4 nerod cion urne ae aot dh ls ln 71 Overview of the Configuration Process c0 ssecbessesees maner re 71 Preparation ss PAN ghee eae 71 Create a New Module in the ControlLogix Controller 72 Device Setup onere nna AAT AA EE sa 75 Chapter 5 Frodon se 107 eg EEE NE NE NE 107 Recommended Equipment suse ar as Se ho dense 045 108 Recommended Start up Procedure vaar oeend ene esos 109 Document Configuration Parameter and Wiring Changes 125 Chapter 6 Introduction SDS ee ent 127 CGCM Unit User Program Interface 0 eee eee eee ee ee eee ee 128 CGCM Unit Data Tables 0 0 eee eee ee eee neeee 132 Chapter 7 Mahe OI Ct daa ell lame te er D 5 aml MN SA An SR kn od 153 Appendix A Generalustransvikafsmes avansert Suduiunente 169 Curve Spee ae apene 169 Time Over current Characteristic Curve Graphs 04 170 Rockwell Auto
16. Excitation limiting active Check UEL OEL active input Correct UEL OEL configuration or change operating point Power Factor unstable erratic Gain misadjusted Observe response of PF to changes in PF setpoint Adjust until a stable response is observed Wiring Error Table 22 Reactive Power Control VAR Symptom VARs not at VAR setpoint Most Likely Cause VAR not enabled Check stability in other control mode such as Droop Diagnostic Action Check input tag VAR_Ened If stable in other mode see above Otherwise check field output wiring and VT CT input wiring Corrective Action If not enabled select appropriate modes of operation to enable VAR mode Gain misadjusted Observe response of VAR to changes in VAR setpoint If a response is slow increase gain Diode failure Use diode monitor if previously configured or measure check diodes Replace as required Excitation limiting active Check UEL OEL active input Correct UEL OEL configuration or change operating point VARs unstable erratic Gain misadjusted Observe response of VAR to changes in VAR setpoint Adjust until a stable response is observed Wiring Error Check stability in other control mode such as Droop Rockwell Automation Publication 1407 UM001H EN P November 2014 If stable in other mode see above Otherwise check field output wiring and VT CT input wiring 157 Chapter
17. If redundancy is desired use both connectors Otherwise you can use either connector You can use the mounting fasteners provided on the right hand side of the unit chassis to fasten the tap cables Minimum bend radius for the ControlNet tap cables is 38 mm 1 5 in Take care not to kink or pinch the ControlNet tap cable or bend it more sharply than the minimum radius Panduit HLM 15RO hook and loop wraps are recommended for securing the tap cable to chassis mounts Use the thumbwheel switches on the front of the CGCM unit to set the ControlNet network node address MAC ID For installation procedures please refer to ControlNet Coax Media Planning and Installation publication CNET INO002 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Chapter 3 CGCM Unit Operation This section provides a operational description of the CGCM unit s functions The CGCM unit incorporates hardware inputs and outputs software inputs and outputs to a Logix family programmable controller configuration settings and its internal control algorithms to provide the regulation synchronizing and protection functions described in this section For information on configuring the CGCM unit see Chapter 4 Configuration For further information on the software interface between the CGCM unit and its host Logix programmable controller see Chapter 6 CGCM Unit Software Interface The Simplified Block Diagram provides a functional
18. 340 4 Real N A PF_VARAuxGain a Factor VAR Auxiliary 99 99 98 ain Rockwell Automation Publication 1407 UM001H EN P November 2014 151 Chapter6 CGCM Unit Software Interface Notes 152 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Chapter 7 Troubleshooting This chapter lists suggested diagnostic and corrective action procedures for a variety of common generator system malfunctions If the suggested actions do not resolve the anomaly please contact Rockwell Automation technical support Information on Rockwell Automation support can be found on the back cover This chapter does not include procedures to diagnose or correct issues related to the basic communication between the CGCM unit and its host Logix controller For assistance in diagnosing ControlNet network communication issues please refer to ControlNet Coax Media Planning and Installation publication CNET INO02 Table 19 Excitation Control FCR Symptom No excitation current output Most Likely Cause Excitation is not enabled Diagnostic Action Check excitation enable hardware and software and FCR select Corrective Action Correct Logix controller logic or 1 0 as required Wiring error Check wiring for excitation enable Correct wiring as required excitation current output fuses open grounding and PMG supply No supply PMG power Measure Voltage at CGCM unit Correct supply anomaly if PMG supply input termi
19. 700 600 500 400 300 200 T 100 g 90 C 80 70 60 D 50 40 A 30 9 9 20 9 0 8 0 7 0 6 0 5 0 10 9 4 0 vn 8 O 7 3 0 Zz 6 O 5 O 2 0 fi 4 Y 3 Zz 1 0 1 2 0 5 1 9 8 7 6 5 4 3 12 KI 09 08 07 06 05 04 03 02 01 5 6 7 8 91 2 3 4 5 678910 20 30 40 50 60 D1089 11 ULTIPLES OF PICK UP Rockwell Automation Publication 1407 UM001H EN P November 2014 175 Appendix Time Over current Characteristic Curves Figure 46 Time Characteristic Curve L2 Long Inverse 99 1594 similar to GE IAC 66 5 6 7 8 91 2 3 4 5 678910 20 30 40 50 60 R 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 gt Orm 20 gt e a oNu N SECONDS GR OOOO Oo O 00000000 TIME o 0 5 RR Oo oNwoOL 02 01 5 6 7 8 91 4 5 6 78910 20 30 40 50 60 2 2 3 D2307 01 MULTIPLES OF PICK UP 176 Rockwell Automation Publication 1407 UM001H EN P November 2014 Time Over current Characteristic Curves Appendix A Figure 47 Time Characteristic Curve D Definite Time 99 1371 similar to
20. Chapter 4 CGCM Unit Configuration This section provides a generic set up and verification procedure for power generation systems by using the CGCM unit and RSLogix 5000 software The various configuration parameters required to customize the device to a specific application are presented Because every application is unique read this section carefully and make sure that the configuration entries are appropriate for the system being implemented For additional information on RSLogix 5000 software see Logix5000 Controllers Common Procedures publication 1756 PM001 Follow these steps when you use the RSLogix 5000 software to configure the CGCM unit 1 Gather the necessary equipment and information 2 Create a new module 3 Enter configuration for the module 4 Edit configuration for a module when changes are needed Appendix F provides a table for recording configuration settings It is suggested that you make a copy of Appendix F use it to record the setup for each unit and retain these records for future reference This generator information is needed to configure the CGCM unit Rated frequency Rated voltage Rated current Rated real power e PMG rated voltage e Full load exciter field voltage e No load exciter field voltage e Full load exciter field current e Generator direct access transient time constant T y Generator exciter field time constant T e Number of main and exciter field poles Rockw
21. Enable excitation in FCR mode Clear the Engineldle tag in the controller tag database Apply simulated generator voltage signals by using the test voltage source Adjust the simulated generator frequency below the under frequency setpoint Verify that an under frequency alarm is annunciated following the expected delay Reverse Power 32R Follow these steps to test that the Reverse Power function is working properly 1 Apply simulated generator voltage and current signals by using the test current and voltage source 2 Adjust the simulated real power until it exceeds the reverse power setting in the negative direction 3 Verify that a generator reverse kW alarm is annunciated following the expected delay Rotating Diode Monitor Test this function after the generator is operating See Diode Monitor set up procedures on page 124 Rockwell Automation Publication 1407 UM001H EN P November 2014 115 Chapter5 CGCM Unit Startup Phase Rotation Error 47 Follow these steps to test that the Phase Rotation Error function is working properly Apply simulated generator voltage signals by using the test voltage source opposite to the configured phase rotation Adjust the simulated generator voltage to the rated generator voltage Verify that a phase rotation fault alarm is annunciated following the expected delay Generator Over current 51 Follow these steps to test that the Generator Over current func
22. The host controller monitors generator voltage and other conditions If those conditions indicate a failure of the primary unit the host controller initiates a transfer by disabling excitation to the primary unit The secondary unit senses the loss of tracking information from the primary unit designate itself the primary energize its redundancy relay output and take over excitation control When operating online that is with the generator breaker closed and the generator operating in parallel with other generators or the power grid the CGCM unit normally operates in VAR or PF mode to regulate reactive power flow The host controller monitors generator conditions as in the offline condition and initiates a transfer to the secondary CGCM unit as appropriate When operating online the generator voltage is relatively fixed therefore the host controller can monitor a different set of conditions such as over excitation or under excitation Host controller operation is dependent on user provided logic programming These events cause a CGCM unit to stop communicating to the backup e A fault of the digital signal processor e A loss of redundant communication e A watchdog time out e A loss of ControlNet communication Redundancy Tracking The CGCM unit provides a tracking function between the secondary and primary CGCM units in a redundant system to reduce the potential for instability that can occur when transferring control between the two u
23. The manual notes differences with earlier versions of the product where they occur iti These documents contain additional information concerning related products tional nesources g P from Rockwell Automation Resource Description Safety Guidelines for the Application Describes some important differences between Installation and Maintenance of Solid State solid state equipment and hard wired Controls publication SGI 1 1 electromechanical devices ControlNet Coax Media Planning and Provides installation procedures for the Installation publication CNET INO002 ControlNet network Logix5000 Controllers Common Procedures Provides information about RSLogix 5000 publication 1756 PM001 software CGCM Release Notes publication 1407 RNO01 Provides information on compatible RSLogix 5000 software versions and ControlLogix controller firmware revisions Industrial Automation Wiring and Grounding Provides general guidelines for installing a Guidelines publication 1770 4 1 Rockwell Automation industrial system Product Certifications website Provides declarations of conformity certificates http www ab com and other certification details You can view or download publications at http www rockwellautomation com literature To order paper copies of technical documentation contact your local Allen Bradley distributor or Rockwell Automation sales representative Rockwell Automation Publication 1407 UM001H
24. Time tag SoftStartTime parameters must be set e excitation enabled tag SoftwareExcEn 1 remote Excitation Enable On discrete input e FCR mode not active tag AVR_FCR_Select 0 engine idle bit is set tag Engineldle 1 Internal Tracking The CGCM unit provides a tracking function between the non active modes of operation and the active mode of operation to minimize the potential for instability that can occur when switching from one mode to another There are two settings you can configure The internal tracking rate defines the time constant of a first order filter through which the CGCM unit matches the non active modes with the active mode and is scaled in seconds The time for the tracking function to settle out after a step change in the operating setpoint is approximately four times the internal tracking rate setting The internal tracking delay setting adjusts the delay of the tracking function to prevent a non active mode from being adjusted into an undesirable condition For example with AVR mode active if the generator sensing VT fails open the excitation output goes to a full on state Applying a tracking delay reduces the likelihood of this undesirable operating point being transferred to a new operating mode Traverse Rates You can control the speed at which the CGCM unit switches from one regulation mode to another by configuring traverse rates for each regulation mode These settings define the rate a
25. VperHz_LoSlope in the configuration table stores this value expressed as a number that reflects per unit change in voltage for each per unit change in frequency Rockwell Automation Publication 1407 UM001H EN P November 2014 83 Chapter 4 84 CGCM Unit Configuration e The Validate and graph button becomes active when a parameter has been changed When clicked the V Hz curve established by the knee and slope values is plotted in the Volts Hz tab Related Parameters e GenRated_V e GenRatedFreq OEL Tab The OEL tab is used to configure the unit s settings related to operation of the Over excitation Limiting OEL function The values entered in this tab establish the thresholds and time delays that determine the behavior of the over excitation limiting function See the generator manufacturer s data sheets for information such as exciter full load and forcing current for setting both online and offline conditions Refer to Chapter 3 for more information on the operation of the OEL function Module Properties Report CNBR 1407 CGCM 4 1 x General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking Load Share Synch Voltage Current Frequency Power UEL OEL Fault Relay E Over Excitation Limiting Enable 7 p 20 00 Offline Over Excitation Limiting Over Excitation Limiting Online 18 00 16 00 High Level Setpoint 30 0 Amps High Level Time De
26. e Over excitation Voltage Setpoint Establishes the over excitation voltage setpoint used by the CGCM unit This setpoint is stored in tag OvrExcV_Setpt in the configuration table and scaled in volts e Over excitation Time Delay Establishes the time to annunciate a fault once the over excitation voltage setpoint has been exceeded This setpoint is stored in tag OvrExcV_TimeDly in the configuration table and scaled in seconds TIP Coordinate the Over excitation voltage setpoint and time delay settings with the OEL function settings to protect the exciter from overheating while avoiding nuisance tripping from normal field forcing during transient conditions 80 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 e Loss of Excitation Current Setpoint Establishes the level of excitation current that is considered to be a minimum needed to maintain generator synchronization when in parallel with other power sources such as a utility grid This setpoint is stored in tag LossExc_I_Setpt in the configuration table and scaled in amperes Excitation current in excess of the loss of excitation current setpoint enables loss of sensing protection e Loss of Excitation Current Delay Establishes the amount of time in seconds that the excitation current must be continually below the Loss of Excitation Current Setpoint before the CGCM unit annunciates a loss of excitation fault This setpoint is store
27. equipment or software described in this manual Reproduction of the contents of this manual in whole or in part without written permission of Rockwell Automation Inc is prohibited Throughout this manual when necessary we use notes to make you aware of safety considerations WARNING Identifies information about practices or circumstances that can cause an explosion in a hazardous environment which may lead to personal injury or death property damage or economic loss ATTENTION Identifies information about practices or circumstances that can lead to personal injury or death property damage or economic loss Attentions help you identify a hazard avoid a hazard and recognize the consequence PE IMPORTANT Identifies information that is critical for successful application and understanding of the product Labels may also be on or inside the equipment to provide specific precautions SHOCK HAZARD Labels may be on or inside the equipment for example a drive or motor to alert people that dangerous voltage may be present BURN HAZARD Labels may be on or inside the equipment for example a drive or motor to alert people that surfaces may reach dangerous temperatures ARC FLASH HAZARD Labels may be on or inside the equipment for example a motor control center to alert people to potential Arc Flash Arc Flash will cause severe injury or death Wear proper Personal Protective Equipment PPE Follow
28. o VGenC VGen N TB 5 To optional cross current reactive compensation loop ID 1A ID 5A ID 13 1 13 13 12 1A 12 5A 12 1 1A 1 5A 1 Customer Supplied CT Cross current CT input Shorting Switch or Test not required for parallel droop operation Rockwell Automation Publication 1407 UM001H EN P November 2014 25 Chapter 2 26 Installation Figure 13 Voltage and Current Connection for Three wire Wye Bus and Four wire Wye Generator System with Grounded Neutral Customer Supplied CT Shorting Switch or Test Cross current CT input Block not required for parallel droop operation Rockwell Automation Publication 1407 UMO001H EN P November 2014 Installation Chapter 2 Figure 14 Voltage and Current Connection for Dual Breaker Bus and Two or three Transformer Delta Generator System LIA L2A L3A LB L2B L3B Optional Ground Use of a third potential transformer is optional The CGCM unit can be connected in either open or closed delta To optional cross rent reactive ompensation loop Customer Supplied CT Shorting Switch or Test Cross current CT input Block not required for parallel droop operation Rockwell Automation Publication 1407 UM001H EN P November 2014 27 Chapter2 Installation Figure 15 Voltage and Current Connection for Dual Breaker Bus and Four wire Wye Generator Syst
29. which avoids writing the kWh kVARh and kVAh presets Connection Behavior during Configuration The CGCM unit operates with an active Class 1 connection with a ControlLogix programmable controller that you programmed and configured The Class 1 connection is made through the module profile The CGCM unit controls the state of two bits in the Input data table to interact with the controller during configuration e ConfigRcvd indicates that a valid Configuration write is accepted by the CGCM unit e UnschdWriteRcvd indicates that a valid Unscheduled Write message is accepted by the CGCM unit Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Software Interface Chapter 6 Two types of connection related services are involved in the configuration of the CGCM unit e Forward Open When a connection is first established for instance when the module profile is first configured or the CGCM unit is powered on a Forward Open service is executed The ConfigRcvd and UnschdWriteRcvd bits initial states are de asserted The controller writes the Configuration data table automatically and when the CGCM unit accepts this write the ConfigRcvd bit is set When the ConfigRcvd bit is set the user program logic rung that controls the Unscheduled Write message is enabled When the CGCM unit accepts the Unscheduled Write the UnschdWriteRcvd bit is set e A Null Forward Open is executed when all these conditions are met
30. 0 4 9 Voltage 80 4 Real A LSRate Load Share Rate s 0 100 20 84 4 Real A LSLimit Load Share Limit PU 0 1 21 88 4 Real N A SyncFreqHiLim Synchronization Frequency Hz 2 2 22 High Limit 92 4 Real N A SyncFreqLoLim Synchronization Frequency Hz 2 2 23 Low Limit 148 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Software Interface Chapter 6 Table 18 Unscheduled Configuration Read Write Data Table Assembly Instance 4 Byte Size in Type Bits Tag Name Description Units Range Error Code Bytes 96 4 Real N A SyncV_HiLim Synchronization Voltage HV 25 25 24 High Limit 100 4 Real N A SyncV_LoLim Synchronization Voltage V 25 25 25 Low Limit 104 4 Real N A SyncPhHiLim Synchronization Phase High Deg 45 45 26 Limit 108 4 Real N A SyncPhLoLim Synchronization Phase Low Deg 45 45 27 Limit 112 4 Real N A SyncAcceptDly Synchronization Accept s 0 10 28 Delay 116 4 Real N A DeadbusGenFreqLoLim Deadbus Generator Hz 40 70 29 Frequency Low Limit 120 4 Real N A DeadbusGenFreqHiLim Deadbus Generator Hz 40 70 30 Frequency High Limit 124 4 Rea N A DeadbusGenV Lolim Deadbus Generator Voltage V 85 30 000 31 Low Limi 128 4 Rea N A DeadbusGenV_HiLim Deadbus Generator Voltage V 8
31. 1407 UM001H EN P November 2014 129 Chapter 6 CGCM Unit Software Interface Unscheduled Write Message Logic This sample ladder diagram rung provides an example of message control for writing the Unscheduled Write data table to the CGCM unit Simplified logic rung to send the Unscheduled Write message from the controller to the 1407 CGCM after the Configuration write has been accepted Enable UW is a user defined permissive interlock CGCM l ConfigRevd asserted indicates that the CGCM has accepted the scheduled Configuration write After a configuration write the CGCM turns off CGCM 1 UnscheduledWriteRcvd completing the rung input logic The one shot fires the message instruction only once Enable UW CGCM I ConfigRevd CGCM I UnschdWriteRcvd shot MSG JE JE d ONS Type CIP Generic EN Message Control msgWriteUW DN 130 Message Configuration mseWnteUW Configuration Communication Tag Message Type CIP Generic v Service Get Attribute Single vi Source Element CGCM C Unschwrite vi Type Source Length 76 Bytes Service i Code fia Hex Class 14 Hex Instance 6 Attribute 3 Hex Enable Enable Waiting Start Done Done Length 0 Error Code Extended Error Code I Timed Out Error Path Error Text Cancel Help IMPORTANT The user is responsible for initiating all unscheduled messaging through the user program IMPORTANT The message length can be 64 bytes
32. 40 The CGCM unit activates this fault when excitation current metered by the CGCM unit falls below the user specified loss of excitation current setpoint for more than the user defined delay time In a redundant CGCM unit system excitation is disabled and a transfer to the secondary controller occurs If this fault occurs tag LossExcFlt I in the Scheduled Read table This fault is inhibited during voltage build and when soft start is active Over excitation Voltage 59F field over voltage When the field voltage rises above the level you specified for more than a set amount of time a field over voltage annunciation occurs Once the field voltage drops below the threshold the field over voltage timer is reset If this fault occurs the CGCM unit shuts down excitation and sets tag OvrExcFlt 1 in the Scheduled Read table Generator Over voltage 59 When the generator voltage rises above the level you specified for more than a set amount of time a generator over voltage annunciation occurs Once the generator voltage drops below the threshold the generator over voltage timer is reset If this fault occurs tag Ovr_V_Flt 1 in the Scheduled Read table Generator Under voltage 27 When the generator voltage falls below the level you specified for more than a set amount of time a generator under voltage annunciation occurs Once the generator voltage rises above the threshold the generator under voltage timer is reset This fu
33. 6 mm 10 AWG copper wire for CT inputs The resistance of the cross current CT wiring must be as low as possible A loop resistance less than 10 of the internal cross current burden resistance of 1 0 Q0 enables cross current operation with negligible voltage droop If the CCCT loop resistance must be higher adjust the CCCT gain or increase the cross current burden resistance You can do those things by adding external resistance to each CGCM unit in the loop The cross current compensation terminals are on TB3 and are labeled ID and ID One and five ampere range terminals are provided 1 Series C devices have internal 1 Q resistor Earlier devices can require an external resistor Rockwell Automation Publication 1407 UM001H EN P November 2014 33 Chapter 2 34 Installation Figure 24 Cross current reactive differential Compensation Connection Diagram Cross current CT typical Customer Supplied CT Shorting Switch or Test Block typical Ground cross current loop G3 at only one point optional Figure 25 Typical Cross current CT Locations and Polarity L1 L2 L3 L1 L2 L3 Cross current CT typical ABC Generator ACB Generator Rockwell Automation Publication 1407 UM001H EN P November 2014 Installation Chapter 2 Communication Connectors and Settings There are three ports on the unit the factory calibration port the redundancy port COM1 and the ControlNet network port
34. 7 10 9 12 GE IAC 77 184 0 5 1 0 9 2 7 3 5 43 5 2 6 2 74 8 2 99 Voltage Restraint In Voltage Restraint mode when the generator voltage is between 100 and 25 of nominal voltage the CGCM unit automatically reduces the selected over current setpoint linearly according to this formula Adjusted over current setpoint original over current setpoint generator voltage voltage restraint setpoint The range of the voltage restraint setpoint is 0 200 A setting of zero disables the voltage restraint 172 Rockwell Automation Publication 1407 UM001H EN P November 2014 Time Over current Characteristic Curves Appendix A Figure 43 Time Characteristic Curve S S1 Short Inverse 99 1369 similar to ABB 56 78 91 2 3 4 5 678910 20 30 40 5060 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 10 9 op 8 O Z 6 O 5 O L 4 3 T Z W 9 M E 1 D 8 8 7 A 6 L 5 S 9 9 9 0 3 8 0 7 0 6 0 2 5 0 4 0 3 0 a 2 0 09 08 07 06 1 0 05 0 5 04 03 02 01 5 6 7 8 91 2 3 4 5 678910 20 30 40 5060 D1089 10 es MULTIPLES OF PICK UP Rockwell Automation Publication 1407 UM001H EN P Novem
35. 8 338 600 rated kVA of rated load kW_Hrs Limit 8 338 600 rated kW of rated load KVAR Hrs Limit 8 338 600 rated kVAR of rated load When the energy tag value reaches 8 388 600 rated kVA of rated load and the unit is still providing the same load level or less the value will not update For instance a 30 MVA machine operating at 10 load will yield an energy tag limit of 8 338 600 1 30000 25 015 800 000 kVAh or 2 50158 x 10 kVAh When the energy tag value exceeds 8 338 600 rounding of the value begins to occur The energy values are not retentive When the 1407 CGCM unit powers up or re establishes a connection with the controller the energy presets in the Unscheduled Write table are written to the energy metering values Rockwell Automation Publication 1407 UM001H EN P November 2014 141 Chapter6 CGCM Unit Software Interface Data Table Table 12 Unscheduled Read Data Table Assembly Instance 5 Byte Size in Type Tag Name Description Units Range Bytes 0 4 Rea AvgPF Average Power Factor PF 1 1 4 4 Rea PhA_PF Phase A Power Factor 8 4 Rea PhB_PF Phase B Power Factor 12 4 Rea PhC_PF Phase C Power Factor 16 4 Rea Total_kVA Total kVA kVA 0 3E 09 20 4 Rea PhA_kVA Phase A kVA 24 4 Rea PhB_kVA Phase B kVA 28 4 Rea PhC_kVA Phase C kVA 32
36. Auxiliary Input The auxiliary input is a 10V DC input The auxiliary input terminals are on TB7 and are labeled VREF and VREF SHLD3 is provided for landing the cable shield Twisted shielded cabling is required for the VREF connections Remote Excitation Enable Input The remote excitation enable input is a24V DC input The remote excitation enable input terminals are on TB7 and are labeled EX D and EX D Discrete Outputs There are two types of discrete outputs fault relay outputs and redundancy relay outputs Rockwell Automation Publication 1407 UM001H EN P November 2014 Bus Voltage Connections Installation Chapter 2 Fault Relay Output The fault relay output is an open collector sinking output The fault relay output terminals are on TB4 and are labeled FLT The following illustration shows a typical connection Figure 18 Typical Fault Relay Connection Redundancy Relay Output The redundancy relay output is an open collector sinking output The redundancy relay output terminals are on TB4 and are labeled RD RLY The following figures illustrate typical redundancy connections Figure 19 Typical Redundancy Voltage Sensing Connection Diagram VE Generator on US en VBus C len VGenC VBus N onnections VGen N TB6 TB5 CGCM 1 VBus A VGenA VBus B VGenB VBus C VGen C VBus N VGen N TB6 TB5 CGCM 2 Rockwell Automation Publication 1407 UM001H EN P November 2014 31 Chapter2 I
37. Configuration errors Observe VT and Bus offset Correct configuration to match configuration parameters to verify expected VT wiring they reflect the desired expected VT wiring Wiring errors Adjust manually such that test Correct VT wiring equipment reference indicates synchronism the observe diagnostics above This information can be used to determine most likely wiring error Voltage not matched verify PT wiring and VT ratios are correct Phase or frequency not matched verify phase rotation and polarity of VT wiring 5 Metering If there is a difference between the metering data reported by the CGCM unit and a reference meter verify the metering used to determine CGCM unit malfunction is being correctly used and in calibration Most Likely Cause Diagnostic Action Corrective Action Configuration errors Observe VT configuration and Correct configuration to match rotation parameters and to verify expected VT wiring they reflect desired expected VT wiring Wiring errors Observe each LL phase average Correct phase rotation polarity voltage and rotation indication grounding or fusing as applicable Indicated rotation matches configured rotation LL voltage and LN if applicable indicated if all low or high indicate ratio error if one or two are low or high indicate polarity grounding or disconnection Measure signal at CGCM unit If voltage indicated corresponds to terminals measured val
38. Current Amps 0 15 ExcRipple Rev 3 x 152 4 Real KW Hrs kW Hours kWh 3 04 10 8 3 04 1038 156 4 Real KVAR Hrs KVAR Hours kVARh 3 04 10 8 3 04 1038 160 4 Real KVA Hrs KVA Hours kVAh 0 3 04 1038 164 4 Real V AdjustOffset Voltage Adjust Offset 10 10 168 2 INT Spare 170 2 INT Resvd Reserved Unscheduled Write Data Table The Unscheduled Write data table contains gains and other configuration parameters that can be written to the CGCM unit by the ControlLogix controller regardless of the excitation state Data in this Controller Tag is written by the host controller to the unit by using unscheduled messaging controlled by the user program Data Type The Unscheduled Write data table is automatically created by using the appropriate module defined data type depending on the CGCM unit firmware revision Assembly Object Instance 6 Unscheduled Write Data Table The Get Attributes Single service for instance 6 of the Assembly Object can access the following information Table 13 Get Attributes Single service code 0x0E Attribute ID Data Type 3 UINT See Unscheduled Write Data Table Assembly Instance 6 Size 4 UINT CGCM firmware 2 x 64 CGCM firmware 3 x or 4 x 72 The Set Attributes Single service for instance 6 of the Assembly Object can access the following information Rockwell Automation Publication 1407 UM001H EN P November 2014 143 Chapter 6 CGCM Un
39. Disable excitation on the primary CGCM unit by removing the hardware excitation enable input or clearing the software excitation enable tag or removing the ControlNet connections or removing 24V DC control power from the primary CGCM unit Verify that the back up CGCM unit has become the primary by observing the status of its Sparel tag in the Input table the state of its CGCM unit s redundancy relay output and the exciter field output current 110 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Startup Chapter 5 Simulate AC Gen and Bus Inputs and Verify Metered Parameters Follow these steps to simulate the AC Gen and Bus inputs and verify the metered parameters 1 Disconnect Generator VT and CT inputs and Bus VT inputs in a manner that lets you verify as much of the system wiring as practical Ideally this is done at the VTs for voltage inputs and at the CT shorting blocks for the CT inputs after suitably shorting the CTs Apply known signals to each of the VT and CT inputs by using the test current and voltage source This can be done one at a time or simultaneously depending upon the source available Observe the scheduled and unscheduled data returned to the controller from the CGCM unit with RSLogix 5000 software Verify that the metered values correctly reflect the simulated signal inputs If errors are found make the necessary wiring or configuration correction
40. EN P November 2014 7 Preface Notes 8 Rockwell Automation Publication 1407 UM001H EN P November 2014 Introduction Functions Chapter 1 General Information The Combination Generator Control Module CGCM unit is a microprocessor based control and protection device The CGCM unit is designed to integrate with a Logix family programmable controller to provide generator control protection and synchronization functions Programmability of system parameters regulation settings and protective functions enable the CGCM unit to be used in a wide range of applications The following sections outline the functions of the unit Generator Regulation and Control Functions This list contains the generator regulation and control functions Four excitation control modes Automatic voltage regulation AVR Manual or field current regulation FCR Power factor PF Reactive power VAR Soft start voltage buildup with an adjustable ramp in AVR and FCR control modes Over excitation OEL and under excitation UEL limiting in AVR VAR and PF control modes Under frequency compensation Volts Hertz Line drop compensation Auto tracking between operating modes and between redundant CGCM units Automatic transfer to a back up CGCM unit in redundant systems Generator paralleling with reactive droop compensation or cross current reactive differential compensation Generator paralleling with real power load sharing
41. In host firmware revision 3 x and later the value of the tag kVARHoursPreset is loaded into the counter Set kVA Hrs When this tag is set to a 1 the KVA_Hrs counter is set to 0 in versions 2 x In host firmware revision 3 x and later the value of the tag kVAHoursPreset is loaded into the counter kwHoursPreset This value is loaded into the kW hrs counter when Set kW Hrs is asserted kVA RHoursPreset This value is loaded into the kVAR_hrs counter when Set kW Hrs is asserted kVA HoursPreset This value is loaded into the kVA hrs counter when Set kW Hrs is asserted Metering Outputs from the CGCM Unit AvgPF This tag reports the Average Power Factor of the active phases of the generator PhA_PF This tag reports the Power Factor associated with Generator Phase A PhB_PF This tag reports the Power Factor associated with Generator Phase B PhC_PF This tag reports the Power Factor associated with Generator Phase C Total_kVA This tag reports the Total kVA being produced by the active phases of the generator PhA_KVA This tag reports the kVA being produced by Generator Phase A PhB KVA This tag reports the kVA being produced by Generator Phase B PhC KVA This tag reports the kVA being produced by Generator Phase C Total kW This tag reports the Total kW being produced by the active phases of the generator PhA kW This tag reports the kW being produced by Generator Phase A PhB kW This tag repor
42. OEL OnLineHiSetpt tag OEL_OnLineMedSetpt This tag sets the medium current level for the online over excitation limiting function Operation at this level is allowed for a time no longer than programmed in the OEL_OnLineMedTimeDly tag OEL_OnLineMedTimeDly This tag sets the amount of time the online over excitation limiting function lets the unit operate at the excitation current level programmed in the OEL_OnLineMedSetpt tag OEL_OnLineLoSetpt This tag sets the low current level for the online over excitation limiting function Operation at this level is allowed continuously OEL OffLineHiSetpt This tag sets the high current level for the offline over excitation limiting function The CGCM unit s over excitation limiter limits excitation current at this level Operation at this level is allowed for a time no longer than programmed in the OEL OffLineHiTimeDly tag OEL OffLineHiTimeDly This tag sets the amount of time the offline over excitation limiting function lets the unit operate at the excitation current level programmed in the OEL_OffLineHiSetpt tag OEL OffLineLoSetpt This tag sets the low current level for the offline over excitation limiting function Operation at this level is allowed continuously Over excitation Limit Outputs from the CGCM Unit OEL Active This tag is set to 1 when the exciter is operating in the Over excitation Limiting mode 220 Rockwell Automation Publication 1407 UM001H EN P Nove
43. PF Var auxiliary gain Cross current gain Table 53 Tracking Tab Parameter Internal tracking rate Units Setting s full scale Internal tracking delay S Redundant tracking rate s full scale Redundant tracking delay S AVR control traverse rate Power factor traverse rate Var control traverse rate Manual control FCR traverse rate 242 Rockwell Automation Publication 1407 UM001H EN P November 2014 Configuration Record Worksheet Appendix F Table 54 Sync Tab Parameter Units Setting Frequency match lower limit Hz Frequency match upper limit Hz Voltage match lower limit Voltage match upper limit Phase match lower limit deg Phase match upper limit deg Acceptance delay s Bus A voltage multiplier N A Bus A offsets phase deg Bus B voltage multiplier N A Bus B offsets phase deg Dead bus minimum frequency Hz Dead bus maximum frequency Hz Dead bus minimum voltage VAC Dead bus maximum voltage VAC Generator phase rotation ABC ACB Bus phase rotation ABC ACB Table 55 Load Share Tab Parameter Units Setting Full Scale Voltage Vdc Limit Rate Rockwell Automation Publication 1407 UM001H EN P November 2014 243 Appendix F Configuration Record Worksheet Table 56 Voltage Tab Parameter Units Setting Over voltage Setpoint percent of rated Over voltage
44. Perform this test with two machines connected in parallel Follow these steps to test the Real Power Load Sharing operation 1 Place one prime mover in constant speed control and the other in manual load control typically droop Adjust the load to a reasonably balanced condition by adjusting the speed setpoint of the droop machine 3 Enable the real load sharing function on both machines Switch the droop machine to constant speed control and observe the real power and load share error reported from the CGCM unit on each machine Verify that the real power balances between the two generators as required and that the load share error from each CGCM unit approaches zero Adjust load share rate and limit as required to provide stable load share operation 122 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Startup Chapter 5 Verify Operation of Limiter Functions and Diode Monitor Perform the following tests to verify Limiter Functions and Diode Monitor operation Volts Hz Operation Perform this test with the generator operating unloaded in Constant Speed mode and constant voltage AVR mode Follow these steps to test the Volts Hz operation 1 With the generator circuit breaker open adjust the prime mover speed down to just above the configured V Hz upper knee frequency Verify that the voltage remains constant 2 Adjust the prime mover speed down to below the configur
45. Setpoint Return from Tracked Value to FCR Setpoint Internal Tracking Delay 4x Internal Tracking Delay Rapid Decline to Tracked Value Upset Mode Switched to FCR Time Increasing the internal tracking rate makes the tracking function less responsive to changes in the regulator output by reducing the slope of the tracking function Increasing the tracking delay offsets the tracking response to the right in the figure In the example above if the internal tracking delay were reduced it is likely that the FCR mode setpoint has started at full regulator output and recovery to the desired operation has been delayed Redundant Tracking TIP Redundant tracking is enabled whenever two CGCM units are configured in a Redundant mode and both are operational Redundant tracking parameters have no effect on a CGCM that is not part of a redundant pair e Redundant Tracking Rate This setting adjusts the rate at which the tracking function of the redundant CGCM unit matches its regulator operating point to that of the active CGCM unit This sets the value of the RedndtTrackRate tag in the Configuration table expressed in seconds per full scale excursion of the regulator output from zero to the rated generator field current Rockwell Automation Publication 1407 UM001H EN P November 2014 93 Chapter 4 94 CGCM Unit Configuration e Redundant Tracking Delay This setting adjusts the delay in the redundant tracking fun
46. Setting Cross reference Although the time characteristic curve shapes have been optimized for each relay time dial settings of the CGCM unit are not identical to the settings of electromechanical induction disk over current relays The Characteristic Curve Cross reference table on page 172 helps you convert the time dial settings of induction disk relays to the equivalent setting for the CGCM unit Using Table Cross reference table values were obtained by inspection of published electromechanical time current characteristic curves The time delay for a current of five times tap was entered into the time dial calculator function for each time dial setting The equivalent CGCM unit time dial setting was then entered into the cross reference table If your electromechanical relay time dial setting is between the values provided in the table it will be necessary to interpolate estimate the correct intermediate value between the electromechanical setting and the factory setting Rockwell Automation Publication 1407 UM001H EN P November 2014 171 Appendix Time Over current Characteristic Curves The CGCM unit has a maximum time dial setting of 9 9 The CGCM unit s equivalent time dial setting for the electromechanical maximum setting is provided in the cross reference table even if it exceeds 9 9 This allows interpolation as noted above CGCM unit time current characteristics are determined by a linear mathematical equation The
47. Synchronizing for one or two circuit breakers Rockwell Automation Publication 1407 UM001H EN P November 2014 9 Chapter 1 General Information Generator Protection Functions This list contains the generator protection functions Loss of excitation current 40 Over excitation voltage 59F Generator over voltage 59 Generator under voltage 27 Loss of sensing 60FL Loss of permanent magnet generator PMG Excitation power 27 Reverse VAR 40Q Over frequency 810 Under frequency 81U Reverse power 32R Rotating diode monitor Phase rotation error 47 Generator over current 51 Metering Functions This list contains the metering functions Voltage Current Frequency Real Power Apparent Power Reactive Power Power Factor Real Energy kWh Apparent Energy kVAh Reactive Energy kVARh Controller Excitation Current and Voltage Diode Monitor Ripple Level Load Share Error Synchronization Parameters 10 Rockwell Automation Publication 1407 UM001H EN P November 2014 General Information Chapter 1 Inputs This list contains the inputs for the CGCM unit e Single phase or 3 phase true rms generator voltage sensing e Single phase dual bus or 3 phase single bus voltage sensing e 3 phase generator current sensing 1 or 5 A nominal e Single phase cross current loop 1 or 5 A current transformer CT input e Auxiliary 10V DC input providing remote control of the setpoints DC power input Outputs
48. This list contains the outputs for the CGCM unit e Pulse width modulated output power stage rated at 15 A e Discrete redundancy relay output e Discrete fault output driver Load sharing connection for use with the Allen Bradley Line Synchronization Module 1402 LSM or compatible hardware Communication Interfaces The CGCM unit has these three communication ports e Redundant ControlNet connector e RS 232 port for dedicated communication with a redundant CGCM RS 232 port for factory configuration and test not for customer use Rockwell Automation Publication 1407 UM001H EN P November 2014 11 Chapter 1 General Information Notes 12 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Chapter 2 Mounting Requirements Installation This equipment is intended for use in a Pollution Degree 2 Industrial Environment in over voltage Category II applications as defined by IEC publication 60664 1 Because the units contain a heat sink they must be mounted vertically Any other mounting angle reduces the heat dissipation capabilities of the units possibly leading to premature failure of critical components The unit can be mounted anywhere that the ambient temperature does not exceed the rated environmental conditions or clearance requirements The clearance requirements for the CGCM unit are 63 5 mm 2 5 in of clearance is required on both sides of the unit when mounted e 101 6 mm 4 in of clearan
49. Voltage tab The Configuration tag contains all other CGCM unit configuration parameters Configuration data from the Configuration tag is written automatically to the CGCM unit only when excitation is not enabled and one of two following conditions occur e A connection is first established to the CGCM unit You change the configuration with the configuration tabs Rockwell Automation Publication 1407 UM001H EN P November 2014 15 Chapter 4 76 CGCM Unit Configuration The Unscheduled Write data tag must be written to the CGCM unit by using a message instruction in the controller program Refer to Chapter 6 for more information on the program interface for CGCM unit configuration Configuration Tabs Input the initial settings parameters to match your system application for each of the configuration tabs as shown in the following paragraphs Review the settings and click OK when complete Descriptions for the configuration tabs labeled General Connection and Module Info are provided in Logix5000 Controllers Common Procedures publication 1756 PM001 Each tab contains four action buttons at the bottom of the tab These buttons function as follows e OK Accepts the entered values for each screen and returns the user to the previous screen e Cancel Exits the screen and returns the values to their previous values e Apply Applies the current settings without leaving the screen e Help Accesses the help men
50. adjusts the generator voltage in proportion to the measured generator reactive power The CGCM unit calculates reactive power by using the 3 phase generator voltage and current sensing inputs The droop adjustment represents the percent reduction from the generator voltage setpoint when the generator produces reactive power corresponding to rated generator kVA Rockwell Automation Publication 1407 UM001H EN P November 2014 45 Chapter 3 CGCM Unit Operation 46 To activate droop the metering CTs and generator VTs must be properly connected and configured the desired droop setpoint must be written to the V_DroopSetpt tag e excitation enabled tag SoftwareExcEn 1 e remote Excitation Enable On discrete input the CGCM unit must be in AVR mode tag AVR_FCR_Select 0 e droop must be enabled V_DroopEn tag 1 e droop must be selected Droop_CCC_Select tag 0 e automatic reactive power control must be disabled tag PF_VAR_En 0 Cross current Compensation Cross current compensation reactive differential compensation is a method of connecting multiple generators in parallel to share reactive load Cross current compensation requires the connection of an additional CT into the cross current compensation input The CGCM unit operates in a stand alone application without the cross current inputs connected The cross current compensation method of reactive load sharing is possible with other controllers of
51. case of certain CGCM unit failures The CGCM unit is equipped with two hardware provisions designed to support redundancy the redundancy communication port and the redundancy relay output Redundancy Communication Port The redundancy ports of the partner CGCM units are connected together by means of a null modem cable The redundancy communication channel is used to exchange tracking information from the primary to the secondary CGCM unit to support a bumpless transfer In addition the secondary CGCM unit can sense a failure in the primary CGCM unit via this communication channel to facilitate an automatic transfer of control Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 Ifa loss of communication between redundant CGCM units occurs the primary CGCM unit remains primary and the secondary CGCM unit switches to primary also Because in this state both units are supplying current to the field the host Logix programmable controller must be programmed to take corrective action for example disable excitation to one CGCM unit when this condition occurs Redundancy Relay Output The redundancy relay output is energized sinks current when the CGCM unit is in Primary mode If the CGCM unit experiences a failure or operates in Secondary mode the redundancy output is de energized The output is used to energize your relay that connects excitation output of the primary CGCM unit to the ge
52. for the operation of the excitation control Except as otherwise noted gain parameters are unitless Appendix B provides additional information regarding the mathematical models used in the unit a Module Properties Report CNBR 1407 CGCM 4 1 Ka Voltage Current Frequency Power UEL OEL Fault Relay General Connection Module Info Generator Transformers Excitation Valts Hz Gain Tracking Load Share Synch Gain Data Unscheduled Write Power Factor Control AVR FCR Control Integral Gain Ki 0 0 Proportional Gain Kp 00 Overall Gain Kg 0 0 Integral Gain Ki 00 VAR Control Derivative Gain Kd 0 0 ontro Integral Gain Ki 0 0 Time Constant Td 00 Overall Gain Kg 00 FCR Overall Gain Kg oo AVR Overall Gain Kg 0 0 Over Excitation Limiting Integral Gain Ki 0 0 Voltage Matching Gain 0 0 Overall Gain Ka 0 0 Gain Data will be applied to UnschWrite member in Configuration Tag The tag values of the A UnschWrite member must then be transferred to Under Excitation Limiting the module via user logic Integral Gain Ki 0 0 When applying changes made to the fields on this 4 tab while excitation is enabled any error message Overall Gain Kg 0 0 which indicates that the configuration was not applied does not refer to this data AVR FOR Auxiliary Gain 0 0 PF VAR Auxiliary Gain 0 0 Cross Current Gain 1 0 Status Offline OK Cancel App Her The parameters in the Gain ta
53. frequency voltage and phase angle of the generator and bus have been matched e BusRotABC ACB Select This tag is used to configure the reference bus rotation sequence e GenRotABC ACB Select This tag is used to configure the generator bus rotation sequence e DeadBusGenFreqLoLim This tag configures the minimum frequency that must be present on the generator to allow the breaker to close under a Dead Bus condition e DeadBusGenFreqHiLim This tag configures the maximum frequency that must be present on the generator to allow the breaker to close under a Dead Bus condition e DeadBusGenV_LoLim This tag configures the minimum voltage that must be present on the generator to allow the breaker to close under a Dead Bus condition e DeadBusGenV_HiLim This tag configures the maximum voltage that must be present on the generator to allow the breaker to close under a Dead Bus condition e DeadBusClosureEn Setting this tag to 1 lets the generator achieve breaker closure with a dead bus Rockwell Automation Publication 1407 UM001H EN P November 2014 229 Appendix E Detailed CGCM Unit Tag Descriptions BusA PhOffset This tag configures a phase angle added to the measured bus A phase angle It is used to compensate for phase shift across sensing transformers BusA_V_Scaler This tag configures a multiplier by which the measured bus A voltage is multiplied It is used to compensate for ratio error across sensing transformers
54. induction disk of an electromechanical relay has a certain degree of non linearity due to inertial and friction effects For this reason even though every effort has been made to provide characteristic curves with minimum deviation from the published electromechanical curves slight deviations can exist between them In applications where the time coordination between curves is extremely close we recommend that you choose the optimal time dial setting by inspection of the coordination study Table 38 Characteristic Curve Cross reference Curve Equivalent To Page Electromechanical Relay Time Dial Setting 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 Factory Equivalent Time Dial Setting 1 ABB CO 2 173 0 3 0 8 eZ 24 3 4 42 5 0 5 8 6 7 1 7 8 6 97 3 ABB CO 5 15 0 4 0 8 5 2 3 3 3 4 2 5 0 6 0 7 0 7 8 8 8 9 9 5 ABB CO 6 177 0 5 1 1 2 0 2 9 3 7 4 5 5 0 5 9 7 2 8 0 8 9 10 1 6 ABB CO 7 178 0 4 0 8 7 2 5 3 3 43 5 3 6 1 7 0 8 0 9 0 9 8 7 ABB CO 8 179 0 3 0 7 5 2 3 3 2 4 0 5 0 5 8 6 8 76 8 7 10 0 9 ABB CO 9 181 0 3 0 7 4 2 1 3 0 3 9 48 5 7 6 7 7 8 8 7 9 6 11 ABB C0 11 183 0 3 0 7 5 2 4 3 2 4 2 5 0 5 7 6 6 7 8 8 5 10 3 8 GE IAC 51 180 0 6 1 0 9 2 7 3 7 4 8 5 7 6 8 8 0 9 3 10 6 10 GE IAC 53 182 0 4 0 8 6 24 3 4 43 5 1 6 3 7 2 8 4 9 6 2 GE IAC 55 174 0 2 1 0 2 0 3 1 4 0 4 9 6 1 7 2 8 1 8 9 9 8 4 GE IAC 66 176 0 4 0 9 8 2 7 3 9 4 9 6 3 7 2 8 5 9
55. is used as the Watt coordinate in the fourth Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve UEL_Curve_W_Pt5 This tag is used as the Watt coordinate in the fifth Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve UEL_Curve_VAR_Pt1 This tag is used as the VAR coordinate in the first Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve UEL_Curve_VAR_Pt2 This tag is used as the VAR coordinate in the second Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve UEL_Curve_VAR_Pt3 This tag is used as the VAR coordinate in the third Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve Rockwell Automation Publication 1407 UM001H EN P November 2014 221 Appendix E Detailed CGCM Unit Tag Descriptions Protection 222 e UEL Curve VAR Pt4 This tag is used as the VAR coordinate in the fourth Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve e UEL Curve VAR Pt5 This tag is used as the VAR coordi
56. of measured excitation current before the timer expires the timer is reset If this fault occurs tag RotDiodeFlt 1 in the Scheduled Read table Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Operation Chapter 3 The Rotating Diode fault is inhibited if the field current is less than 1 5 A DC or if the generator frequency is outside the range of 45 70 Hz Phase Rotation Fault 47 The CGCM unit calculates the negative sequence voltage of the 3 phase generator voltage sensing input When the generator phase rotation is opposite to the wiring rotation you configured the level of the generator negative sequence voltage increases to approximately 100 The pickup value for this function is fixed at 66 When the pickup value is exceeded timing is started After a one second delay a phase rotation fault is indicated A phase rotation fault is also indicated when a phase loss condition occurs If this fault occurs tag PhRotFlt 1 in the Scheduled Read table Generator Over current 51 51V A generator over current fault occurs when generator current exceeds the generator over current function s setpoint You configure over current protection by selecting a time characteristic curve an over current setpoint a time dial setting and a voltage restraint setpoint The over current function meets ANSI IEEE C37 112 See Appendix A for a list of available curves and more detail If this fault occurs ta
57. of rated generator voltage Time delay 0 1 300 s 0 1 s Pickup 2 rated voltage Over voltage Protection Attribute Accuracy 100 140 of rated generator voltage Time delay 0 1 300 s 0 1 s Pickup 2 rated voltage Loss of Sensing Protection Attribute 1407 CGCM Pickup See text description in Operation section of the manual for this item Time delay 0 1 s for normal operation 1 s during soft start Rockwell Automation Publication 1407 UM001H EN P November 2014 Specifications Appendix D Loss of PMG Attribute 1407 CGCM lt 10V AC single phase lt 50V AC 3 phase or an imbalance greater than 20 Response time lt 400 ms Pickup Reverse VAR Attribute Range Increment Accuracy Time delay 0 10 300 s 0 10 s 0 1 s Over Under frequency Pickup 30 70 Hz 0 01 Hz 2 Hz Time delay 0 10 300 s 0 10s 0 1 s Reverse Power Attribute Accuracy 0 5 rated VA 1 100 of rated generator VA Time delay 0 10 300 s 0 10s 0 1 s Pickup Rotating Diode Monitor Range Attribute 1407 CGCM Number of generator poles 0 24 Number of brushless exciter poles 0 24 Increment 2 Fault time delay applies to both open and 0 1 300 s shorted diode conditions Rockwell Automation Publication 1407 UM001H EN P November 2014 207 Appendix D Specifications Rotating Diode Monitor Open and Shorted Diode In
58. of the positive sequence current The positive sequence current is less than 1 of rated current for 0 1 seconds The single phase loss of sensing is expressed by this logical formula Loss of Sensing 1 and 2 and 3 or 4 The time delay for this function is fixed at 0 1 seconds during normal operation and increased to 1 0 seconds during soft start operation Loss of Sensing is disabled when the excitation current is less than the Loss of Excitation setpoint If this fault occurs tag LossSensingFlt 1 in the Scheduled Read table 56 Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Operation Chapter 3 Loss of Excitation Power PMG 27 If voltage to the PMG excitation power inputs falls below 10V AC for approximately 400 ms or more a Loss of Excitation power fault occurs When single phase PMG is selected the CGCM unit senses phases A and C for this function This function is disabled when Shunt excitation is selected the Engineldle tag is set or the host Logix controller is in Program mode If this fault occurs tag LossPMGFit 1 in the Scheduled Read table Reverse VAR 400 When the Reverse VAR level exceeds the characteristic curve for an amount of time you set a Reverse VAR fault occurs The characteristic curve is a line that begins at the pickup setting you defined at zero real power and extends toward positive reactive power at an angle of 8 Once the VARs increase above the
59. operation based on its previous configuration data The following recognized ControlNet General Response Codes are used in response to the reset request Table 44 Reset service code 0x05 Response Value Meaning Object State Conflict A reset cannot be performed excitation enabled Assembly Object class code 0x04 The Assembly Object is used to provide application specific information about a device Assembly Class Instance instance 0 Instance 0 of any ControlNet object represents the class itself The Get Attributes Single service for instance 0 of the Assembly Object can access the following information Table 45 Get Attributes Single service code 0x0E Name AtrlD Data Type Value Revision 1 UINT 2 Max Instance 2 UINT 6 Assembly Object Instance 1 through Instance 6 Refer to Chapter 6 for a discussion of Assembly Instance 1 6 and their related attributes and services Rockwell Automation Publication 1407 UMO001H EN P November 2014 Specifications Appendix D The CGCM unit s electrical and physical characteristics are listed in the following tables Control Power Supply Burden 18 32V DC 24V DC nom The device is to be powered by a 24V Nominal Battery or 24V DC Power Supply with ATEX certification 30 W AC ripple max 50 50 120 Hz Excitation Power Source Phases Wiring Configuration Volta
60. power without damage caused by overheating The CGCM unit provides a number of limiting functions designed to maintain operation within safe areas of the generator capability curve A typical generator capability curve is shown in the following illustration Figure 30 Typical Generator Capability Curve 10 Field Winding 0 8 Heating Limitation gt Raking PF c E Laygin 2 0 6 gging Armature Winding 5 Heating Limitation D a 0 2 o z 2 E 0 0 Prime Mover Power Limitation ec 02 95 PF 0 4 7 Armature Core AG gt 96 End Iroh Heatin 3 Limitation s 0 8 EE da 0 0 0 2 0 4 0 6 0 8 10 12 1 4 Real Power per Unit Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 Volts Hertz Limit Volts Hertz limiting acts to reduce the generator output voltage by an amount proportional to generator frequency This is done to protect the generator from overheating and reduce the impact on the prime mover when adding a large load When the generator frequency drops the voltage setpoint is automatically adjusted by the CGCM unit so that generator voltage follows the under frequency slope The CGCM unit provides two configurable knee frequencies and two configurable slopes that allow the user to define the Volts Hz characteristic The slopes are expressed in PU Volts PU Hertz For a nominal 60 Hz 120V syste
61. power factor control 90 under excitation limiting 91 VAR control 90 gains 44 general excitation control inputs 214 outputs 214 general information 9 generator and bus voltage 20 generator capability curve 50 generator current sensing 21 generator over current 59 228 inputs 228 outputs 228 generator over voltage 55 223 224 inputs 223 outputs 224 generator parameters and configuration status 213 inputs 213 outputs 214 generator protection functions 10 generator regulation and control functions 9 generator tab 77 generator under voltage 55 224 inputs 224 outputs 224 initial checkout 109 initiating synchronization 61 inputs 11 inputs and outputs 38 analog 38 analog outputs 41 CGCM front panel 38 discrete 40 discrete outputs 42 power 40 installation 13 internal tracking 49 introduction 9 L limiters 191 limiting functions 50 generator capability curve 50 over excitation limit 52 under excitation 53 volts hertz 51 line drop compensation 47 Rockwell Automation Publication 1407 UM001H EN P November 2014 inputs 221 load compensator mode 189 load share tab 99 load sharing 231 inputs 231 outputs 232 loss of excitation current 55 inputs 222 223 outputs 223 power 57 loss of operating power 225 inputs 225 outputs 225 loss of sensing 56 224 inputs 224 outputs 224 math models 189 metering 64 162 233 functions 10 inputs 233 outputs 233 parameters 64 mounting clearance 13 dimensions 14 enviromen
62. powered down and load share lines connected Diagnostic Action Verify CGCM unit is firmware revision earlier than 3 3 Corrective Action Replace with Series 3 x CGCM unit when available Add relay to disconnect load share lines on power down Load share full scale voltage configurations do not match Check full load voltage configuration in each load share device Set full load voltage same in all load share devices Governor error Most Likely Cause Phase not matched Check governor for use of LS error from CGCM unit Diagnostic Action Observe Phase match tag during synchronization Correct governor Corrective Action If phase match indicated check close command tag If no phase match indicated check phase match error Observe phase error reported by CGCM unit during synchronization If no phase error is reported by CGCM unit correct wiring and verify appropriate Synchronization mode is active If phase error reported verify governor is responding to CGCM unit reported error Close output from CGCM unit not being examined Monitor Close breaker tag from CGCM unit If close indication received check use of tag If no close indication check match errors Frequency not matched Observe frequency match tag during synchronization If frequency match indicated check close command tag If no frequency match indicated check frequency match error Observ
63. ranges The inputs for 3 phase current sensing are on TB3 The ID and ID terminals are used for systems connected in a cross current compensation system Voltage and Current Sensing Connection Examples The following examples depict typical connections of voltage also called potential transformer VTs and current transformers CTs to the CGCM unit for various bus and generator power system configurations These diagrams do not show all connections to the CGCM unit nor are they intended to show all possible wiring combinations For assistance in wiring a CGCM unit in a power system configuration not shown below please contact Rockwell Automation Rockwell Automation Publication 1407 UM001H EN P November 2014 21 Chapter2 Installation Figure 9 Voltage and Current Connection for Two or three Transformer Delta Bus and Two or three Transformer Delta Generator System Optional Ground Use of a third potential transformer is optional The 0 VBus N CGCM unit can be connected in either open or closed delta Optional y oan Use of a third potential transformer is optional The CGCM unit can be connected in either open or closed delta SSS NNN WO Tiga OT gt Customer Supplied CT Shorting Switch or Test Cross current CT input Block not required for parallel droop operation 22 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Installati
64. selected Droop_CCC_Select tag 0 e automatic reactive power control must be enabled tag PF_VAR_En 1 VAR control must be selected tag PF_VAR_Select 1 Soft Start Mode CGCM unit Soft Start mode provides for an orderly build up of generator voltage from residual to the voltage setpoint in the desired time with minimal overshoot When the system is in Soft Start mode the CGCM unit adjusts the voltage reference based on the Soft Start Initial Voltage and Soft Start Time The Soft Start Voltage Reference illustration is a graph for the voltage reference showing soft start initial voltage at 30 soft start time at 8 seconds Figure 29 Soft Start Voltage Reference 110 105 100 Setpoint 50 Of Rated voltage 01234 5 6 7 8 9 1011 1213 14 15 16 17 18 19 20 Time In Seconds pe oe Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 If the generator is not up to speed when the soft start begins the voltage increases but only to the level determined by Volts Hz limiting When the unit is operating in FCR mode soft start operates as it does in the AVR mode with the field current rather than the generator voltage being the controlled parameter To activate soft start mode the Soft Start Initial Voltage tag SoftStart InitLevel and Soft Start
65. supply power Measure Voltage at CGCM unit PMG supply input terminals Correct supply anomaly if insufficient voltage is measured Measure generator residual voltage shunt excitation If less than 10V AC consult generator manufacturer s documentation and flash the generator field Generator not up to rated speed Check generator speed Increase generator speed to rated speed Correct condition preventing rated speed from being attained Field resistance too great Disconnect field current outputs at CGCM unit and measure load resistance Correct verify load resistance is within CGCM unit capability Gain mis adjusted Check gains entered into CGCM unit configuration Calculate adjust as required Excitation limiting active Check OEL active input Correct OEL configuration or change operating point Droop compensation is driving down the voltage Check Droop Enable Rockwell Automation Publication 1407 UM001H EN P November 2014 Adjust disable droop compensation 155 Chapter 7 Troubleshooting Table 20 Excitation Control AVR Symptom Voltage output is greater than setpoint Most Likely Cause AVR not selected enabled Diagnostic Action Check excitation AVR select Corrective Action Correct Logix controller logic or 1 0 as required Wiring error Check wiring for excitation current output VT inputs fuses open grounding and PMG supply
66. table Reverse Power Protection 32R When generator reverse power exceeds the reverse power setting for a specified amount of time a reverse power fault occurs Once the reverse power drops below 95 of the threshold the reverse power fault timer is reset If this fault occurs tag RevPwrFlt 1 in the Scheduled Read table Rotating Diode Failure The Rotating Diode Monitor is capable of detecting one or more open or shorted diodes in the generator s rotor If a failed diode is detected a fault occurs The CGCM unit monitors specific harmonic components present in the field current The frequency of the harmonics is proportional to the system frequency and the ratio between the main and exciter field poles For example during normal operation at 60 Hz a 3 phase exciter bridge produces a ripple current frequency of 1080 Hz 1080 Hz 6 60Hz 12 exciter poles 4 main poles A shorted diode produces increased ripple current at 1 6 of the normal ripple frequency or 180 Hz Similarly an open diode shows increased current at 1 3 of the normal ripple frequency or 360 Hz The CGCM unit senses harmonics in the 1 6 and 1 3 harmonic levels to provide protection for these conditions When the ripple current at one of these frequencies exceeds the applicable user specified threshold a timer is started Once the time delay is exceeded a rotating diode fault occurs If the ripple current falls below the threshold configured as percent
67. tag in the Output Scheduled Write Data table is set Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 The tags listed below determine the points shown in the UEL configuration diagrams below These tags are in the configuration table and are set by the like named fields in the UEL tab VAR values are actually negative indicating leading Configure the VAR and Watt tags with increasing real power values in point 1 through point x These tags define the curve breakpoints As shown the curve continues horizontally left from point I and vertically up from point 5 The tags are expressed in Watts or VARs respectively Reactive Power VARs Real Power Watts Point 1 is defined by tags UEL Curve W Ptl and UEL Curve VAR Pti Point 2 is defined by tags UEL Curve W Pt2 and UEL Curve VAR Ptr2 Point 3 is defined by tags UEL Curve W Pt3 and UEL Curve VAR Pt3 Point 4 is defined by tags UEL Curve W Pt4 and UEL Curve VAR Pt4 Point 5 is defined by tags UEL Curve W Pt5 and UEL Curve VAR Pt5 e Validate and Graph button Updates the graph in the UEL tab after entering new values Related Parameters e UEL Entagin the Output table Rockwell Automation Publication 1407 UM001H EN P November 2014 87 Chapter 4 CGCM Unit Configuration Gain Tab The Gain tab is used to configure the unit s gain parameters necessary
68. the AVR operating mode It also determines the characteristic of the dynamic response to a change in the voltage of the generator AVR_Traverse_Rate This parameter determines the time measured in seconds for the setpoint to move from zero to the rated generator voltage If determines how fast the regulator changes the voltage setpoint from the tracking value to the operating setpoint when the Regulator Operating mode changes to AVR AVR FCRAuxGain This tag lets you to adjust the overall gain of the auxiliary input s control on the AVR FCR operating mode The units for this are percent of nominal per volt A setting of one results in the controlled parameter being changed by one percent of the nominal value for each volt applied to the auxiliary input Rockwell Automation Publication 1407 UM001H EN P November 2014 215 Appendix E Detailed CGCM Unit Tag Descriptions AVR Mode Outputs from the CGCM Unit The AVR mode has one output e AVR FCR Selection This tag reports the selection of AVR or FCR control see AVR FCR Select FCR Mode This section describes the FCR mode inputs and outputs for the CGCM unit FCR Mode Inputs to the CGCM Unit The FCR mode has these inputs AVR_FCR Select This tag lets you select AVR or FCR control e FCRSetpt This tag sets the desired field current setpoint for operation in the FCR control mode e AVR_FCR_Kp This tag sets the Proportional Gain parameter for AVR and FCR control m
69. threshold the Reverse VAR fault timer is reset If this fault occurs the CGCM unit shuts down excitation and sets tag RevVARFIt 1 in the Scheduled Read table The Reverse VAR Characteristic graph shows more details Figure 35 Reverse VAR Characteristic 1 0 0 8 gt 06 0 4 gt Generator ab er 0 2 Characteristic Curve D 0 0 Z 8 2 Reyerse VAR 02 Trip Setting 0 6 f Trip Region 3 0 8 1 0 0 0 0 2 0 4 06 08 10 1 2 1 4 Real Power per Unit Rockwell Automation Publication 1407 UM001H EN P November 2014 57 Chapter 3 58 CGCM Unit Operation Over frequency 810 When generator frequency exceeds the over frequency setpoint for a specified amount of time a definite time over frequency fault occurs Once the frequency drops below the threshold the over frequency fault timer is reset If this fault occurs tag OvrFreqFlt I in the Scheduled Read table Under frequency 81U When generator frequency drops below the under frequency setpoint for a specified amount of time a definite time under frequency fault occurs This function is disabled during soft start timing when no voltage is present on the generator voltage sensing inputs or when the Engineldle tag is set Once the frequency rises above the threshold the under frequency fault timer is reset If this fault occurs tag UndrFregFlt 1 in the Scheduled Read
70. unit enters a configuration fault mode and ignores all data in the configuration write The Connection tab in the module configuration dialog box in RSLogix 5000 software displays an error code corresponding to the first offending configuration parameter The CGCM unit does not perform any application checking for example is a value suitable for the particular application or dependency checking for example is a value reasonable based on other values entered Data Table Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Software Interface Chapter 6 Table 18 Unscheduled Configuration Read Write Data Table Assembly Instance 4 Byte Size in Type Bits Tag Name Description Units Range Error Code Bytes 0 1 SINT N A Space Reserved for Logix controller Revision Configuration Number 1 3 SINT N A Pad Bytes Reserved for Logix controller Usage 4 1 Bool 0 RevVARFItQutEn Reverse VAR Fault Output 0 Disabled Enable 1 Enabled Bool 1 RevPwrFltOutEn Reverse Power Fault Output Enable Bool 2 OvrExcFltOutEn Over excitation Fault Output Enable Bool 3 Ovr I FltQutEn Over current Fault Output Enable Bool 4 Undr V FltOutEn Under voltage Fault Output Enable Bool 5 OvrVFItOutEn Over voltage Fault Output Enable Bool 6 UndrFreqFltQutEn Under frequency Fault Qut
71. voltage frequency and phase When the synchronizing conditions are met the CGCM unit sets the proper close breaker tag Dual bus The CGCM unit performs synchronization by using the generator bus inputs and the active bus inputs Dead bus If dead bus closure is enabled the CGCM unit sets the close breaker tag when the generator frequency and voltage are within the configured dead bus limits IMPORTANT Prior to Host FRN 4 9 regardless of the setting of the DeadbusGenFreqLoLimit parameter the CGCM unit disables synchronization when the generator frequency is below 45 Hz When the CGCM unit senses that all three one for single phase setup bus voltages are less than 10 of the configured voltage and frequency is less than 20 Hz it sets the Dead Bus Synchronizing mode tag The CGCM unit does not calculate voltage or frequency error signals during Dead Bus mode Phase rotation 3 phase connection only If the bus and generator are opposite in phase rotation synchronization fails The CGCM unit continually checks phase rotation match when synchronization is active e Permissive Synchronization The host controller sets the PermissiveSyncEn tag to enable Permissive Synchronization mode This mode is the same as Automatic Synchronizing mode except that the CGCM unit does not compute error and correction tags The CGCM unit sets the proper close breaker tag when the synchronizing conditions are met Rockwell Automation Pub
72. 0 0 Hz 2 E Lower Slope 2 0 Volts Hz 604 8 Generator 404 Rated Frequency 60 Hz dl 204 0 t t t t t t 0 10 20 30 40 50 60 70 80 90 Frequency Hz e amp Gr Status Offline Cancel Apr Help e Volts per Hertz Upper Knee Frequency Establishes the frequency at which the V Hz characteristic starts to reduce the generator voltage as a function of generator frequency Tag VperHz_HiKneeFreq in the configuration table stores this value expressed in Hertz The upper knee frequency must be greater than the lower knee frequency e Volts per Hertz Upper Slope Establishes the rate at which the V Hz characteristic reduces the generator voltage as a function of generator frequency between the upper and lower knee frequencies Tag VperHz_HiSlope in the configuration table stores this value expressed as a number that reflects per unit change in voltage for each per unit change in frequency e Volts per Hertz Lower Knee Frequency Establishes the frequency at which the V Hz characteristic starts to reduce the generator voltage at the lower slope rate as a function of generator frequency Tag VperHz_LoKneeFreq in the configuration table stores this value expressed in Hertz The lower knee frequency must be less than the upper knee frequency e Volts per Hertz Lower Slope Establishes the rate at which the V Hz characteristic reduces the generator voltage as a function of generator frequency below the Lower Knee Frequency setting Tag
73. 0 05 Hz Bus voltage 57 208V AC lt 0 2 50 60 Hz Bus frequency 10 90 Hz 0 05 Phase angle 180 1 0 Field voltage 0 200V DC 1 25 V or 1 0 whichever is greater Field current 0 30 A AC 0 15 A or 41 0 whichever is greater Power factor 0 5 0 5 lt 0 4 of actual PF Power real and reactive 0 200 of nom lt 0 4 of rated kVA Load share Resolution 0 1 of full scale voltage Load Share entity parameters Ui 0 5V LS Ci 101 nF LS li 111 ApA Li 0 Rockwell Automation Publication 1407 UM001H EN P November 2014 209 Appendix D Specifications Environment Attribute 1407 CGCM Temperature operating 20 70 C 4 158 F Temperature storage 40 85 C 40 185 F Humidity operating 5 95 noncondensing Shock operating 30g Shock nonoperating 50 g in 3 perpendicular planes Vibration operating 10 500 Hz 5 0 g 0 015 in max p p 2 hours each axis Dielectric strength Tested per IEEE 421 3 Salt fog Tested per MIL STD 810E Method 509 3 Agency Certifications Region 2 3 4 Certification Compliance Standard USA and Canada Class Zone 2 UL60079 0 6th Edition CSA60079 0 11 AEx ic nA IIC T4 Ex ic nA IIC T4 Gc UL60079 11 6th Edition CSA60079 11 11 UL60079 15 4th Edition CSA60079 15 12 Class Division 2 Groups A B C or D ANSI ISA 12 12 01 2013 CSA C22 2 No 213 M1987 UL File E220640 Europe 11 3
74. 00 1 Transformer Primary Voltage 12 4 Real N A GenVT_Sec_V Generator Voltage V 240 2 Transformer Secondary Voltage 16 4 Real N A BusA_VT_Pri_V Bus A Voltage Transformer V 30 000 3 Primary Voltage 20 4 Real N A BusA_VT_Sec_V Bus A Voltage Transformer V 240 4 Secondary Voltage 24 4 Real N A BusB_VT_Pri_V Bus B Voltage Transformer V 30 000 5 Primary Voltage 28 4 Real N A BusB_VT_Sec_V Bus B Voltage Transformer V 240 6 Secondary Voltage 32 4 Real N A GenCT Pri I Generator Current A 60 000 7 Transformer Primary Current 36 4 Real N A GenCT_Sec_ Generator Current A oD 8 Transformer Secondary Current 40 4 Real N A CCCT Pri I Cross Current A 60 000 9 Compensation Transformer Primary Current 44 4 Real N A CCCT Sec I Cross Current A nit 5 0 Compensation Transformer Secondary Current 48 2 INT A GenVT_Config Generator Voltage 4 1 Transformer Configuration 50 2 INT N A BusVT_Config Bus Voltage Transformer eid 2 Configuration 52 4 Real N A GenRated_W Generator Rated Power W 0 1E 09 3 56 4 Real N A GenRated_V Generator Rated Voltage V 85 30 000 14 60 4 Real N A GenRated Generator Rated Current A 10 60 000 15 64 4 Real N A GenRatedFreq Generator Rated Frequency Hz 50 60 6 68 4 Real N A GenRatedExcV Generator Rated Excitation V 1 200 7 Voltage 72 4 Real N A GenRatedExcl Generator Rated Excitation A 0 1 15 8 Current 76 4 Real A LS_FS_V Load Share Full Scale V
75. 30 40 50 60 D1090 01 ULTIPLES OF PICK UP 178 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Time Over current Characteristic Curves Appendix A Figure 49 Time Characteristic Curve I I1 Inverse Time 99 1373 similar to ABB CO 8 5 6 7891 2 3 4 5 6 7 8910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 T 10 9 or ny 8 E a 7 Z 6 O s5 D O Jo 4 wy A 3 zZ L 5 2 9 9 gt i 9 0 8 0 7 0 6 0 9 5 0 8 3 4 0 6 3 0 5 4 2 0 3 2 1 0 0 5 B 09 08 07 06 05 04 03 02 01 5 6 7 8 9 1 2 3 4 5 6 78910 20 30 40 50 60 01990502 MULTIPLES OF PICK UP Rockwell Automation Publication 1407 UM001H EN P November 2014 179 Appendix Time Over current Characteristic Curves Figure 50 Time Characteristic Curve I2 Inverse Time 99 1597 similar to GE IAC 51 5 6 7 8 91 2 3 4 5 6 78910 20 30 40 50608 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 k oO ANAOD
76. 4 Rea PhA_kW Phase A kW kW 3E 09 3E 09 36 4 Rea Ph_B_kW Phase B kW 40 4 Rea PhC kW Phase C kW 44 4 Rea Total KVAR Total KVAR KVAR 48 4 Rea PhA KVAR Phase A KVAR 52 4 Rea PhB KVAR Phase B kVAR 56 4 Rea PhC_kVAR Phase C kVAR 60 4 Rea Avg Average Current A 0 60 000 64 4 Rea PhA I Phase A Current 68 4 Rea PhB_ Phase B Current 72 4 Rea PhC_ Phase C Current 76 4 Rea PhAB_GenV Phase AB Generator Voltage V 0 30 000 80 4 Rea PhBC_GenV Phase BC Generator Voltage 84 4 Rea PhCA_GenV Phase CA Generator Voltage 88 4 Rea AvgLN_GenV Average LN Generator Voltage 92 4 Rea PhA_GenV Phase A Generator Voltage 96 4 Rea PhB_GenV Phase B Generator Voltage 00 4 Rea PhC_GenV Phase C Generator Voltage 04 4 Rea AvgLL_BusV Average LL Bus A Voltage 08 4 Rea PhAB_BusV Phase AB Bus A Voltage 12 4 Rea PhBC_BusV Phase BC Bus A Voltage 16 4 Rea PhCA_BusV Phase CA Bus A Voltage 20 4 Rea AvgLN_BusV Average LN Bus A Voltage 24 4 Rea PhA_BusV Phase A Bus A Voltage V 0 30000 28 4 Rea PhB_BusV Phase B Bus A Voltage 32 4 Rea PhC_BusV Phase C Bus A Voltage 36 4 Rea BusB_V Bus B Voltage 40 4 Rea Exc_V Excitation Voltage 0 200 142 Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Software Interface Chapter 6 Table 12 Unscheduled Read Data Table Assembly Instance 5 Byte Size in Type Tag Name Description Units Range Bytes 144 4 Real Exc_ Excitation Current Amps 0 15 148 4 Real ExcRipple I Rev 2 x Excitation Ripple
77. 42 droop 45 inputs 219 E electrical connections 15 Rockwell Automation Publication 1407 UM001H EN P November 2014 245 Index 246 AG voltage sensing 20 auxiliary input 30 chassis ground 20 communication connectors and settings 35 control power 19 cross current compensation 33 current sensing 20 discrete outputs 30 excitation output 19 excitation power 17 real power load sharing 33 remote excitation enable input 30 terminal block 15 electronic keying 74 equipment required 72 excitation output 19 power 17 tab 80 excitation control features 219 cross current compensation 219 droop 219 line drop compensation 221 over excitation limit 220 soft start 219 under excitation limit 221 222 under frequency limit 219 modes 44 214 automatic voltage regulation mode 45 auxiliary input regulation adjust 47 cross current compensation 46 droop 45 field current regulation mode 45 gains 44 general excitation control 214 internal tracking 49 line drop compensation 47 power factor regulation mode 47 reactive power regulation mode 48 traverse rates 49 F fault relay outputs 31 tab 105 FCR mode 216 inputs 216 outputs 216 field current regulation mode 45 regulator 195 field over voltage 55 firmware revision considerations 127 frequency tab 103 functions 9 control 9 inputs and outputs 11 metering 10 protection 10 regulation 9 G gain tab 88 AVR FCR control 88 other gains 91 over excitation limiting 90
78. 4V DC to the unit 2 Verify that following the CGCM unit s initial power self test the ControlNet media status indicators flash and then become solid green Rockwell Automation Publication 1407 UM001H EN P November 2014 109 Chapter5 CGCM Unit Startup Verify the ControlNet Network Connection Follow these steps to verify the ControlNet network connection 1 Use the RSWho function of RSLinx software to browse and confirm the CGCM unit is on the ControlNet network Verify the CGCM unit s firmware revision is the same or later than indicated on the firmware revision label Use RSLogix 5000 software to confirm that the CGCM unit s connection status is good and that the communication logic MSG instructions is executing properly Verify that scheduled and unscheduled data communication is updating by viewing changing data in the controller tag database Statically Test CGCM System Redundancy Operation These steps apply only for CGCM units configured in a redundant pair 1 Connect a suitable load to the excitation output terminals of the CGCM units through redundancy relays you provide Enable excitation in FCR mode with an FCR setpoint greater than the loss of field current setpoint Verify that only one CGCM unit is the primary by observing the status of the Sparel tag in the Input table the state of the primary CGCM unit s redundancy relay output and the exciter field output current
79. 5 30 000 32 High Limi 132 4 Rea N A BusA PhOffset Bus A Phase Offse Deg 180 180 33 136 4 Rea N A BusA V Scaler Bus A Voltage Scaler 0 30 000 34 140 4 Rea N A BusB_PhOffset Bus B Phase Offse Deg 180 180 35 144 4 Rea N A BusB V Scaler Bus B Voltage Scaler 0 30 000 36 148 4 Rea N A VperHz HiKneeFreq Volts per Hz Upper Knee Hz 15 90 37 Frequency 152 4 Real N A VperHz_HiSlope Volts per Hz Upper Slope PUV 0 3 38 PUHz 156 4 Rea N A VperHz_LoKneeFreq Volts per Hz Low Knee Hz 15 90 39 Frequency 160 4 Real N A VperHz_LoSlope Volts per Hz Low Slope PUV 0 3 40 PUHz 164 4 Real N A V_DroopSetpt Voltage Droop Setpoint 30 30 41 168 2 T N A OvrExcV_Setpt Over excitation Voltage Volts 100 20 000 42 Setpoint 100 170 2 NT N A OvrExcV_TimeDly Over excitation Voltage s 100 10 3000 43 Time Delay 172 2 NT N A Ovr_V_Setpt Over voltage Setpoint 100 10000 14000 44 174 2 NT N A Ovr_V_TimeDly Over voltage Time Delay s 100 10 30 000 45 176 2 T N A Undr_V_Setpt Under voltage Setpoint 100 6000 10 000 46 178 2 NT N A Undr_V_TimeDly Under voltage Time Delay s 100 10 30 000 47 180 2 NT N A OpenDiodeMonitorLevel Open Diode Monitor Level 100 0 10 000 48 182 2 T N A ShortedDiodeMonitorLev el Shorted Diode Monitor 100 0 10 000 49 Level 84 2 NT N A DiodeMonitorTimeDly Diode Monitor Time Delay s 100 10 30 000 50 86 2 NT N A MainPole Main Pole Poles 2 24 51 Rockwell Automation Publi
80. 5 loss of excitation current 55 loss of excitation power 57 loss of sensing 56 over excitation voltage 55 over frequency 58 phase rotation fault 59 reverse power 58 reverse VAR 5 rotating diode failure 58 under frequency 58 reactive current compensation 45 reactive power regulation mode 48 real power load sharing 33 63 recommended equipment programming terminal 108 two channel chart recorder 108 record system parameters 72 Rockwell Automation Publication 1407 UM001H EN P November 2014 247 Index 248 redundancy 66 165 235 inputs 235 operation 67 outputs 236 relay outputs 67 tracking 68 redundancy relay outputs 31 regulation functions 9 remote excitation enable input 30 required equipment test current and voltage source 109 reverse power protection 58 226 227 inputs 226 outputs 227 reverse VAR 57 225 inputs 225 outputs 225 rotating diode failure 58 rotating diode monitor 227 inputs 227 outputs 227 S safety 107 soft start inputs 219 soft start control 194 software inputs and outputs 43 software interface 127 specifications 201 agency certifications 210 auxiliary input 203 bus voltage sensing 203 communication ports 203 control power 201 environment 210 excitation power 201 field output 204 generator current sensing 202 generator voltage sensing 202 loss of excitation 205 loss of sensing protection 206 manual excitation control 209 metering 209 open collector outputs 204 ove
81. 7 Troubleshooting Table 23 Compensation Modes Droop Symptom Voltage does not change with changes in reactive load while not connected to the grid Most Likely Cause Droop not selected active Diagnostic Action Check tag Droop Ened Corrective Action If not active check correct logic for mode selection Cross current mode is enabled selected Check Droop_CCCT_Select tag If active check correct logic for mode selection Metering error See Metering troubleshooting See Metering troubleshooting Reactive power does not change with adjustments to the voltage setpoint while connected to the grid Droop not selected active Check tag Droop_Ened If not active check correct logic for mode selection PF or VAR control enabled selected Check tag PF_VAR_Control If active check correct logic for mode selection Metering error See Metering troubleshooting See Metering troubleshooting Voltage and or reactive load is unstable when operating in droop AVR Gains misadjusted Check voltage stability when operating isolated from load and if possible in constant voltage control Calculate correct AVR gains if required Metering error Table 24 Compensation Modes Cross Current Symptom VARs share but not equally even when the system load changes Most Likely Cause Gain mis adjustment See Metering trouble shooting Diagnostic Action Check CCCT Gain
82. 8 7 6 2 0 5 4 1 0 2 0 5 at 09 08 07 06 05 04 03 02 01 0 50 6 0 8 1 0 2 3 4 5 6 7 8910 20 30 40 50 60 02570 07 MULTIPLES OF PICK UP SETTING 188 Rockwell Automation Publication 1407 UM001H EN P November 2014 Introduction Synchronous Machine Terminal Voltage Transducer and Load Compensator Model Appendix B CGCM Unit Math Models This appendix contains the mathematical model of the CGCM unit s excitation systems The rotating rectifier model is based on the type AC8B model available in the reference Computer Models for Representation of Digital Based Excitation Systems in the IEEE Transactions on Energy Conversion September 1996 Vol 11 No 3 This paper was prepared by the Digital Excitation Task Force of the Equipment Working Group and jointly sponsored by the Performance and Modeling Working Group of the Excitation System Subcommittee The CGCM unit implements the load compensation by using the vector sum of the magnitudes of the terminal voltage and of the terminal current The model provided in IEEE Standard 421 5 1992 for terminal voltage transducers and load compensators can be used to model this function in the CGCM unit s system as shown in the following equation Figure 59 Terminal Voltage and Load Compensation Elements Vr sval Vei 1 Vey abs Vr Re jXc lr LU pp Ts gt ve R The values used in this model can be derived from the CGCM set
83. A connection is already established A change to the Configuration or Unscheduled Write data tables is made in the module profile tabs Appy or OK is clicked The controller attempts to write the Configuration automatically If excitation is enabled the configuration write is rejected If excitation is not enabled the CGCM unit accepts a valid configuration write Regardless of excitation status the CGCM unit de asserts the Unsched WriteRcvd bit during the execution of a Null Forward Open This action re enables the user program logic rung that controls the Unscheduled Write message When the CGCM unit accepts the Unscheduled Write the UnschdWriteRcvd bit is set With the UnschedWriteRcvd bit asserted the CGCM unit begins processing Scheduled Write Output data and is ready for normal operation based on configuration and outputs received The CGCM unit ignores any Scheduled Write Output data if the UnschedWriteRcvd bit is not asserted Configuration Summary These are the configuration changes to the CGCM unit e The CGCM unit accepts Configuration data only when excitation is disabled and all configuration data is in the correct range e The CGCM unit accepts Unscheduled Write data regardless of the excitation state provided that all Unscheduled Write data is in the correct range Rockwell Automation Publication 1407 UM001H EN P November 2014 131 Chapter6 CGCM Unit Software Interface Operating Interfaces In norma
84. ALL Regulatory requirements for safe work practices and for Personal Protective Equipment PPE gt gt gt Allen Bradley Rockwell Software Rockwell Automation ControlLogix Logix5000 and RSLogix are trademarks of Rockwell Automation Inc Trademarks not belonging to Rockwell Automation are property of their respective companies New and Updated Information Summary of Changes This manual contains new and updated information Changes throughout this revision are marked by change bars as shown to the right of this paragraph This table contains the changes made to this revision Topic Page Updated the dimension diagrams 14 Updated the Configuration Messaging section 129 Added information for the Network status indicator 164 Added information for the Module status indicator 165 Updated the Get Attributes All service code 0x01 table for Identity 198 Object Instance 1 Updated the Get Attributes All service code 0x01 table for Identity 199 Object Instance 2 Added a Device Status for Identity Object Instance 2 99 Updated the Certification information in the Agency Certifications 210 table Rockwell Automation Publication 1407 UM001H EN P November 2014 Summary of Changes Notes 4 Rockwell Automation Publication 1407 UM001H EN P November 2014 General Information Installation CGCM Unit Operation CGCM Unit Configuration CGCM Unit Startup CGCM Unit Software Interface
85. C 53 5 6 7 8 91 2 3 4 5 6 78910 20 30 40 50608 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 A a oND N SECONDS TIME gt omz H mavVov N WB JONDO O O 0000000 o o amp o ol 01 5 6 7 8 91 2 3 4 5 678910 20 30 40 50600 p2507 03 ULTIPLES OF PICK UP 182 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Time Over current Characteristic Curves Appendix A Figure 53 Time Characteristic Curve E E1 Extremely Inverse 99 1375 similar to GE IAC 11 5 6 7 8 91 2 3 4 5 6 78910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 80 70 60 50 40 30 20 a ANWOD N SECONDS TIME gt woaNawor gt O N Dai ON NOOO O O 000000 O De oO o a o e o ua 02
86. CGCM unit after verifying configuration settings Load sharing not enabled Check output tag kW_LS_EN is set and input tag W_LS_ACTIVE is true If Loadsharing must be disabled no anomaly is present otherwise correct loadsharing logic for tag kW_LS_En CGCM unit not properly configured Check configuration parameters Input correct configuration are properly set Refer to Load parameters Share tab Chapter 4 Wiring errors cause CGCM unit to not Check kW indication from CGCM Correct wiring errors meter kW properly unit against second meter for accurate kW indication Governor not responding to load Observe that load share error is Correct anomaly in Host controller if a share error being received from CGCM unit in host controller valid load share error is received Units do not share load equally one unit increases the other unit decreases 160 Load share lines connected with polarity reversed Rockwell Automation Publication 1407 UM001H EN P November 2014 Observe that load share error is being received from CGCM unit in host controller and error polarity is correct Correct polarity on LS lines Troubleshooting Chapter 7 Table 28 Real Power Load Sharing Symptom Units do not share load equally units both change together Table 29 Synchronizing Symptom No close indication from CGCM unit Most Likely Cause Series 2 CGCM unit on network is
87. CM unit if the Bus VT configuration selection is dual breaker e Generator CT Primary Current Is the primary current rating of the generator current transformers This parameter is stored in tag GenCT Pri Iin the configuration table e Generator CT Secondary Current The secondary current rating of the generator current transformers connected to the CGCM unit s terminals I1 12 and I3 This parameter is stored in tag GenCT_Sec_I in the configuration table e Cross Current CT Primary Current The primary current rating of the cross current generator current transformer This parameter is stored in tag CCCT Pri I in the configuration table It is used for monitoring generator reactive current in paralleling applications e Cross Current CT Secondary Current The secondary current rating of the cross current generator current transformer connected to the CGCM unit terminals ID and ID This parameter is stored in tag CCCT_Sec_I in the configuration table It is used for monitoring generator reactive current in paralleling applications EXAMPLE As an example consider a generator rated at 12 470V and 450 A VTs with ratios of 100 1 and CTs with ratios of 500 5 are used The appropriate settings for this configuration are e Generator VT Primary Voltage 12 000 e Generator VT Secondary Voltage 120 e Generator CT Primary Current 500 e Generator CT Secondary Current 5 Rockwell Automation Publication 1407 UM001H EN P Novemb
88. CM units or other compatible generator control devices such as the Line Synchronization Module bulletin number 1402 LSM to load the generators under their control such that the same per unit output is developed by each generator A 0 5V DC signal is developed proportional to the per unit kW output of the generator and fed to the load sharing terminals through an internal resistor The configurable full scale voltage corresponds to the rated generator kilowatts The load sharing output is updated every 50 ms The load sharing terminals are connected in parallel plus to plus minus to minus with other compatible devices If the CGCM unit s generator is more heavily loaded than the others its developed load share voltage is higher and current flows out of the CGCM unit and into other devices on the network A more lightly loaded generator results in a lower load share voltage and current flowing into the CGCM unit The direction and magnitude of current flow is used to develop the Load Share Error value the CGCM unit makes available to the host logic controller The host logic controller program can use this value to control the prime mover governor and balance generator output with others in the system The CGCM unit exhibits two rate of change features Limit and Rate that work together to protect against an unstable system Rockwell Automation Publication 1407 UM001H EN P November 2014 63 Chapter 3 CGCM Unit Operation 64
89. DC and provides a means to remotely adjust the regulation point of the generator Resistive isolation is provided through the use of differential amplifiers The auxiliary input terminals are labeled VREF and VREF Power Inputs The unit has two types of power inputs control power inputs and excitation power inputs Control Power Input The CGCM unit operates from a nominal 24V DC supply connected to the control power inputs The control power input is diode protected to protect against equipment damage due to improper polarity of the applied power The control power inputs are labeled BAT and BAT Excitation Power Input The CGCM unit accepts either 3 phase or single phase excitation power Excitation power can be obtained from the generator or the utility via shunt excitation SE or from the generator prime mover via a Permanent Magnet Generator PMG See Chapter 2 for details on connections for SE or PMG operation The excitation power input terminals are labeled PMG A PMG B and PMG C Discrete Inputs Remote Excitation Enable The remote excitation enable input is a 24V DC input When 24V DC is applied to the input CGCM unit excitation is permitted IMPORTANT for generator excitation to occur excitation must be enabled in software an active ControlNet connection must be present and a 24V DC signal must be applied to the remote excitation enable input The remote excitation enable input terminals are labe
90. Factory Calibration Port The factory calibration port is not intended for use by anyone other than qualified factory representatives Redundancy Port COM1 The DB 9 female connector on the bottom side of the CGCM unit is used for communication with another CGCM unit when operating in a redundant system configuration Use a null modem cable for this connection See CGCM Unit Interconnection Cable table for connector pin numbers functions names and signal directions The cable pin out is illustrated in the CGCM Unit Interconnection Cable Diagram Table 2 CGCM Unit Interconnection Cable Pin Name Description Function 1 Not used 2 XMIT Transmit Sends serial data from CGCM unit 3 RCV Receive Receives serial data from CGCM unit 4 DTR Data terminal ready Receives a signal that the sending unit is operational 5 GND Ground Provides the ground signal 6 DSR Data set ready Sends a signal that the CGCM unit is operational 7 8 9 Not used Figure 26 CGCM Unit Interconnection Cable Diagram To CGCM Unit To CGCM Unit DB 9 Female DB 9 Female DB 9 MALE DB 9 MALE NO CONNECTION 1 XMIT XMIT RCV RCV DTR DTR GND GND DSR 6 DSR NO CONNECTION NO CONNECTION NO CONNECTION Rockwell Automation Publication 1407 UM001H EN P November 2014 35 Chapter 2 36 Installation ControlNet Network Port Two ControlNet tap cables and channel labels are included with the 1407 CGCM unit
91. Freq Lower Frequency Boo 5 Raise Ph Raise Phase Boo 6 Lower Ph Lower Phase Boo 7 SyncFailure Synchronization Failure Rockwell Automation Publication 1407 UM001H EN P November 2014 135 Chapter 6 CGCM Unit Software Interface Table 7 Scheduled Read Data Table Byte Size in Type Bits Tag Name Description Units Range Bytes 9 1 Bool 0 AutoSync Auto Synchronization Enabled 0 Disabled Bool 1 CheckSync Check Synchronization Enabled Eg Bool 2 PermissiveSync Permissive Synchronization Enabled Boo 3 UndefinedSyncMode Undefined Synchronization Mode 0 No 1 Yes Bool 4 SyncModeConflict Synchronization Mode Conflict Boo 5 SyncDeadBus Dead Bus Synchronization Bool 6 CloseBusA_Brkr Close Bus A Breaker 0 Don t Close Boo 7 CloseBusB_Brkr Close Bus B Breaker rales 10 1 Boo 0 Spare2 Indicates when the excitation 0 Inactive output short circuit protection is 1 Active active Bool 1 FreqLessThan10Hz Frequency Less Than 10 Hz I O False 1 True Bool 2 Spare3 Bool 3 SetptTraverseActive Traverse Setpoint Active 0 Setpoint Traverse Bool 4 ShortedRotDiodeFlt Rotating Diode Shorted Fault O Inactive Bool 5 OpenRotDiodeFlt Rotating Diode Open Fault OE Bool 6 HardwareExcEned Hardware Excitation Enabled 0 Disabled Bool 7 SoftwareExcEned Software Excitation Enabled SE 11 1 Bool 0 ConfigRevd Co
92. G Ex ic nA IIC Ge DEMKO 14 ATEX 1230U E IECEx UL 14 0018U Ne EN 60079 15 2010 EN ISO IEC 80079 34 2011 CE Compliance EN 60947 1 Low voltage switch and control gear requirements EN 50081 2 Electromagnetic compatibility emissions EN 61000 4 2 Electromagnetic compatibility immunity EN 61000 4 2 ESD Immunity ENV 50204 Radiated immunity Pulse EN 61000 4 3 Radiated immunity Continuous EN 61000 4 4 Fast transient immunity EN 61000 4 5 Surge immunity EN 61000 4 6 Conducted immunity EN 61000 4 8 Power frequency magnetic field EN 55011 Conducted emissions Radiated emissions EN 61000 4 11 Line related tests 1 Mount this equipment in an EN 60079 15 certified enclosure with a minimum ingress protection of IP54 as defined in EN 60529 and used in an environment of not more 2 3 4 210 than Pollution Degree 2 as defined in EN 60664 1 when applied in Zone 2 environments Transient protection limiting transients to 140 of rated voltage must be provided The device is to be powered by a 24V Nominal Battery or 24V DC Power Supply with ATEX certification Use wire rated to 105 C 221 F minimum Rockwell Automation Publication 1407 UM001H EN P November 2014 Physical Characteristics Specifications Appendix D Attribute 1407 CGCM Width 247 7 mm 9 75 in Height 355 6 mm 14 00 in Depth 209 6 mm 8 25 in Weight 7 7 kg 17 Ib Heat dissipation 3 1 kW max Rockwell Automatio
93. GCM unit verifies that the generator output phase rotation matches the user configured selection of ABC or ACB To enable the dual bus mode select the Bus VT Configuration as Dual Breaker Single phase The CGCM unit is also capable of synchronizing where only a single line to line input is available from the generator or bus This is the case for single phase systems or in systems where only one phase has a transformer connected for synchronizing purposes The CGCM unit can perform no phase rotation check on the generator output with single phase generator voltage sensing The reference bus connection can be either single or 3 phase Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Operation Chapter 3 To enable single phase synchronizing select the Generator VT Configuration as Single phase Configurable Synchronization Parameters The CGCM unit provides a number of configurable settings to facilitate synchronizing between systems with different voltages and metering configurations Please refer to Chapter 4 for more information Initiating Synchronization Prior to performing synchronization the host controller must initialize tags in the Output table to their appropriate values as described below e Automatic Synchronization The host controller sets the AutoSyncEn tag to enable the synchronizer to compute error and correction tags in the software interface for control of the synchronization bus
94. M Unit Software Interface Chapter 6 Table 7 Scheduled Read Data Table Byte Size in Type Bits Tag Name Description Units Range Bytes 5 1 Boo 0 CGCM_FIt CGCM Internal Fault O Inactive Boo 1 LossExcFlt Loss of Excitation Current Fault FE Boo 2 OEL Active Over excitation Limiting Active Boo 3 UEL_Active Under excitation Limiting Active Boo 4 LossSensingFlt VT Sensing Loss Boo 5 LossPMGFIt PMG Loss Boo 6 RotDiodeFlt Rotating Diode Fault Boo 7 PhRotFit Phase Rotation Fault 6 1 Boo 0 BusRot ABC ACB Rotation Bus 0 ABC 1 ACB Boo 1 GenRot ABC ACB Rotation Generator Boo 2 FitOut Output Active Fault D Inactive 1 Active Boo 3 ExcOut Excitation Out Enabled 0 Disabled 1 Enabled Boo 4 PF VAR Selection Power Factor VAR Selection 0 PF 1 VAR Boo 5 PF VAR Control Ened Power Factor VAR Control Enabled 0 Disabled 1 Enabled Bool 6 AVR_FCR_Selection AVR FCR Control Selection 0 AVR 1 FCR Boo 7 FLTResetAck Reset Acknowledge Fault 0 No 1 Yes 7 1 Boo 0 BusV_Present Bus Voltage Present 0 False 1 True Boo 1 GenV_Present Generator Voltage Present Boo 2 PhRotMatch Phase Rotation Match Boo 3 V_Match Voltage Match Boo 4 FreqMatch Frequency Match Boo 5 PhMatch Phase Match Boo 6 CGCMInControl CGCM Control 0 No 1 Yes Boo 7 Spare1 CGCM is active in a redundant pair I O False 1 True 8 1 Boo 0 Activebus A B Bus A B Active 0 Bus A 1 Bus B Boo 1 Raise V Raise Voltage 0 False 1 True Boo 2 Lower V Lower Voltage Boo 3 Raise Freq Raise Frequency Boo 4 Lower
95. N When this tag is set to 1 the CGCM unit enables the kilowatt load share function Rockwell Automation Publication 1407 UM001H EN P November 2014 231 Appendix E Detailed CGCM Unit Tag Descriptions kW LS OutV This tag sets the voltage that the CGCM unit attempts to output from the load sharing terminals KVAR LS OutV This tag is reserved for future use LS FS V This tag sets the voltage the load share output reaches when the generator is producing I p u kVA The base for this calculation is the calculated generator kVA LSRate This tag configures the time required for the load share output to change the per unit amount defined above LSLimit This tag configures the amount of per unit change allowed in the load share output per unit of time defined below KWAnalogTargetPU Value The value of this tag is used to provide the bias to the load share lines when the kW_LS_BridgeEN tag is set to 1 KWDigitalTargetPU Value This tag is reserved for future use KVARAnalogTargetPU Value This tag is reserved for future use KVARDigitalTargetP UValue This tag is reserved for future use Load Sharing Outputs from the CGCM Unit KVAR LS Active This tag is reserved for future use kW LS Active This tag follows the KW LS En tag setting in the Scheduled Write tag LS_Err This tag reports the load share error that is the difference between the kW_LS_OutV and the kW LS InputV kW LS InputV This tag rep
96. P Q plane The desired UEL curve is generated based on the user input points Typical UEL reference is illustrated in Under excitation Limiter Reference Figure 63 Per unit Block Diagram for Under excitation Limiter To PID Controller Figure 64 Under excitation Limiter Reference reactive power Q real power P user defined 2 UEL curve et Pie Per unit Block Diagram for Over excitation Limiter shows the model of the CGCM over excitation limiter OEL The OEL makes up the inner loop of the voltage regulator and uses a PI type controller In this control scheme the actual field current is compared with a reference field current The operating characteristics are designed to mimic the field current short time overload capability given in ANSI standard C50 13 1977 The reference field current is calculated based on the user input parameters as shown in Over excitation Limiter Reference Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Math Models Appendix B Figure 65 Per unit Block Diagram for Over excitation Limiter To PID Controller OEL REF Figure 66 Over excitation Limiter Reference Reference Field Current I og rer Count Down For Reset OEI1 OEI2 OEI3 Time s OET 1 OET2 gt gt V Hz Limiter V Hz limiter is designed to protect the generator and step up transformer from damage due to excessive magnetic flux resulting fro
97. Rockwell Automation Publication 1407 UM001H EN P November 2014 225 Appendix E Detailed CGCM Unit Tag Descriptions Definite Time Over frequency Outputs from the CGCM Unit e OvrFreqFlt This tag is used to communicate the occurrence of an Over frequency Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Definite Time Under frequency Inputs to the CGCM Unit e UndrFreqFltOutEn When this tag is a 1 in the configuration and an Under frequency Fault occurs as defined by the UndrFreqSetpt tag the Fault Relay is energized When this tag is a 0 in the configuration an Under frequency Condition has no effect on the Fault Relay e UndrFreqSetpt This tag configures the generator under frequency setpoint at which the CGCM unit recognizes an under frequency condition is present and starts timing to trip based on the Under frequency Time Delay e UndrFregTimeDly This tag configures the time to shutdown annunciate once the generator Under frequency Setpoint has been exceeded Engineldle Setting this tag to 1 disables the under frequency under voltage and Loss of PMG protections until the generator is at rated speed Definite Time Under frequency Outputs from CGCM e UndrFreqFlt This tag is used to communicate the occurrence of an Under frequency Fault to the host Logix controller When this
98. Rs transfer opposite from one generator to another CT polarity or differential circuit wiring error Verify CT polarity on each generator by disconnecting differential circuit and operating on cross current control Correct CT polarity and differential circuit wiring as needed VARs share but are unstable Gain mis adjustment Table 25 Compensation Modes Line Drop Symptom Voltage does not change with changes in reactive load while not connected to the grid Most Likely Cause Line Drop not active Check CCCT Gain Diagnostic Action Check tag LineDropComp Correct as required Corrective Action If not active check correct logic for mode selection Metering error See Metering troubleshooting See Metering troubleshooting Voltage is unstable AVR Gains misadjusted Check voltage stability when operating isolated from load and if possible in constant voltage control Calculate correct AVR gains if required Table 26 Limiting Modes UEL Symptom VARs absorbed exceed the programmed UEL limit UEL does not Metering error Most Likely Cause See Metering troubleshooting Diagnostic Action See Metering troubleshooting Corrective Action limit activate UEL not enabled Check tag UEL_En and Correct logic or configuration as configuration required UEL Gain misadjusted Force into UEL Adjust gains as required UEL not configured Check UEL curve interc
99. Tag Name Description Units Range Error Code Bytes 264 4 Real N A OEL_OnlineHiTimeDly Over excitation Online High s 0 60 79 Time Delay 268 4 Real N A OEL_OnlineMedSetpt Over excitation Online A 0 9999 80 Medium Setpoint 272 4 Real N A OEL_OnlineMedTimeDly Over excitation Online s 0 120 81 Medium Time Delay 276 4 Real N A OEL_OnlineLoSetpt Over excitation Online Low 0 9999 82 280 4 Real N A OEL_OfflineHiSetpt Over excitation Offline High 0 9999 83 Setpoint 284 4 Real N A OEL_OfflineHiTimeDly Over excitation Offline High s 0 10 84 Time Delay 288 4 Real N A OEL_OfflineLoSetp Over excitation Offline Low A 0 9999 85 Setpoint 292 4 Real N A AVR_Traverse_Rate AVR Traverse Rate S 0 200 86 296 4 Real N A FCR_Traverse_Rate FCR Traverse Rate s 0 200 87 300 4 Real N A VAR_Traverse_Rate VAR Traverse Rate S 0 200 88 304 4 Real N A PF_Traverse_Rate PF Traverse Rate S 0 200 89 308 4 Real N A Softstart_InitLevel Soft Start Initial Level 0 90 90 312 4 Real N A SoftStartTime Soft Start Time s 1 7200 91 316 4 Real N A InternalTrackRate Internal Track Rate s FS 1 80 92 320 4 Real N A InternalTrackDly Internal Track Delay s 0 8 93 324 4 Real N A RedndtTrackRate Redundant Track Rate s FS 1 80 94 328 4 Real N A RedndtTrackDly Redundant Track Delay s 0 8 95 332 4 Real N A CrossCurrentGain Cross Current Gain 30 30 96 336 4 Real N A AVR_FCRAuxGain AVR FCR Auxiliary Gain 99 99 97
100. Time Delay s Under voltage Setpoint percent of rated Under voltage Time Delay s Over excitation Voltage Setpoint VDC Over excitation Time Delay s Droop Percentage Line Drop Voltage Compensation Table 57 Current Tab Parameter Units Setting Over current Setpoint Over current Curve Over current Time Dial Over current Voltage Restraint Setpoint Table 58 Frequency Tab Parameter Units Setting Over frequency Setpoint Hz Over frequency Delay s Under frequency Setpoint Hz Under frequency Delay s Table 59 Power Tab Parameter Units Setting Reverse kW Setpoint Reverse kW Fault Delay s Reverse kvar Setpoint Reverse kvar Fault Delay s 244 Rockwell Automation Publication 1407 UM001H EN P November 2014 A AG voltage and current sensing 20 generator and bus voltage 20 generator current 21 AG voltage sensing 20 analog inputs 38 auxiliary 40 bus voltage sensing 39 crosscurrent 39 generator line currents 39 generator voltage sensing 38 analog outputs 41 excitation 41 real power load sharing 41 applying configuration 75 automatic operating modes 120 cross current 120 droop 120 PF control 122 real power load sharing 122 VAR control 121 automatic voltage regulation mode 45 auxiliary input 30 auxiliary input regulation adjust 47 AVR mode 215 inputs 215 outputs 216 C CGCM applying configuration 75 dimensions 14 front pa
101. Type dialog box appears Add the CGCM unit as a ControlNet module under the 1756 CNB R ControlNet Bridge module in the controller Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 2 Select 1407 CGCM click Create and then in the Select Major Revision dialog box enter the Major Revision of the host firmware for example 4 where the host firmware revision is 4 x or 2 where the host firmware is revision 2 x IMPORTANT You must enter the correct Major Revision at this time Do not change the Major Revision number once the module is created If you need to change it at a later time you must delete the module and configure a new module Select Module Type Catalog Module Discovery Favorites 1407 Clear Filters Catalog Number Description Vendor Category 1407 CGCM Combination Generator Control Module Allen Bradley Other Select Major Revision xs Select major revision for new 1407 CGCM module being created Major fa X OK Cancel Help 3 Click OK The Module Properties dialog box appears 4 Enter a Name for the module its ControlNet Node address and its Revision the minor revision number for example 25 where the host firmware revision is 4 25 Rockwell Automation Publication 1407 UM001H EN P November 2014 73 Chapter4 CGCM Unit Configuration 5 Select an Electronic Keying mode to s
102. User Manual Allen Bradley Combination Generator Control Module Catalog Numbers 1407 CGCM Allen Bradley Rockwell Software Automation Important User Information Read this document and the documents listed in the additional resources section about installation configuration and operation of this equipment before you install configure operate or maintain this product Users are required to familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes laws and standards Activities including installation adjustments putting into service use assembly disassembly and maintenance are required to be carried out by suitably trained personnel in accordance with applicable code of practice If this equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired In no event will Rockwell Automation Inc be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment The examples and diagrams in this manual are included solely for illustrative purposes Because of the many variables and requirements associated with any particular installation Rockwell Automation Inc cannot assume responsibility or liability for actual use based on the examples and diagrams No patent liability is assumed by Rockwell Automation Inc with respect to use of information circuits
103. a percentage of the nominal generator voltage e SoftStartTime This tag configures the time it takes to go from the Soft Start Initial Voltage to the nominal generator voltage Droop Reactive Current Compensation Inputs to the CGCM Unit Droop_CCC_Select If Droop is enabled this tag selects CCC when set to 1 or Droop when set to 0 e V DroopEn This tag configures whether Droop is enabled e V_DroopSetpt This tag configures the amount of voltage droop that is experienced during paralleling generator applications Under frequency Limit Inputs to the CGCM Unit e VperHz_HiKneeFreq The Knee Frequency tag configures the frequency at which the V Hz characteristic starts to reduce the generator voltage as a function of generator frequency e VperHz_HiSlope The Upper Slope tag configures the rate at which the V Hz characteristic reduces the generator voltage as a function of generator frequency The steeper the slope the faster the prime mover is unloaded and smaller the frequency variations are experienced during load applications e VperHz_LoKneeFreq The Knee Frequency tag configures the frequency at which the V Hz characteristic starts to reduce the generator voltage as a function of generator frequency e VperHz_LoSlope The Lower Slope tag configures the rate at which the V Hz characteristic reduces the generator voltage as a function of generator frequency after the Lower Knee Frequency is exceeded Cross current Co
104. abled e Droop reactive power compensation Cross current compensation Line drop compensation Two OEL current levels high and low are defined for offline operation as shown in the graph below The generator can operate continuously at or below the low OEL current level and for a time at the high OEL current level that you configure Figure 32 Offline Over excitation Limiting EEE ENE EE EEE e l High M Current 2 High Low Level oO a Current CONTINUOUS Current 0 30 A de Time Level Lu T 0 10 seconds 0 15 Adc TIME IN SECONDS Three OEL current levels high medium and low are defined for online operation as shown in the graph below The high and medium current levels can be maintained only for time periods you define The generator can operate continuously at or below the low OEL current level Figure 33 Online Over excitation Limiting High ce Current DE 5 Medium Level 2 i f i Current 0 0 30 A de a High Medium Current Low Level u j Current CONTINUOUS 00 20Ade x Time Time Current 0 10 d 0 120 seconds Level AG 0 0 15 A de TIME IN SECONDS 52 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 The CGCM unit also uses two counters the reset counter and the time limit counter The counters are used to prevent excessive heating of the exciter field that can be a result of repeated ov
105. ady state is too long increase Ki The tag PF_Ki in the Unscheduled Write table stores this parameter e Overall Gain Kg Sets the overall gain which determines the characteristic of the dynamic response to changes in power factor If the transient response has too much overshoot decrease Kg If the transient response is too slow with little or no overshoot then increase Kg The tag PF_Kg in the Unscheduled Write table stores this parameter VAR Control The VAR Control gains determine the response of the VAR control loop for the voltage regulation function when in VAR mode These settings can be adjusted during system startup Please refer to Chapter 5 for more information on tuning the VAR control gains Integral Gain Ki Sets the integral gain Generally if the time to reach steady state is too long increase Ki The tag VAR_Ki in the Unscheduled Write table stores this parameter e Overall Gain Kg Sets the overall gain which determines the characteristic of the dynamic response to changes in VARs If the transient response has too much overshoot decrease Kg If the transient response is too slow with little or no overshoot then increase Kg The tag VAR_Kg in the Unscheduled Write table stores this parameter Over excitation Limiting The OEL gains determine the response of the OEL control loop for the voltage regulation function when OEL is active These settings can be adjusted during system startup Please refer to Ch
106. age 112 generator under voltage 112 loss of excitation current 111 loss of PMG 114 loss of sensing 113 over excitation voltage 112 over frequency 114 phase rotation error 116 reconnect all permanent connections 116 reverse power 115 reverse VAR 114 rotating diode monitor 115 under frequency 115 test redundancy operation 110 test synch breaker normal position 119 Rockwell Automation Publication 1407 UM001H EN P November 2014 breaker test position 119 time over current characteristic curves 169 time over current graphs 170 time dial setting cross ref 171 voltage restraint 172 tracking tab 92 internal tracking 92 redundant tracking 93 traverse rates 94 transformers tab 78 traverse rates 49 troubleshooting 153 communication 164 metering 162 protection 166 redundancy 165 U UEL tab 86 under excitation limit 53 inputs 221 222 outputs 222 under frequency 58 under frequency limit inputs 219 user program interface 128 configuration messaging 129 operating interfaces 132 Index V VAR mode 218 inputs 218 outputs 218 VAR power factor controller 191 verify ControlNet connection 110 verify limiter functions and diode monitor diode monitor 124 OEL 124 UEL 123 volts Hz 123 voltage regulator 190 voltage tab 100 compensation settings 101 over voltage 100 under voltage 101 volts hertz limiting 51 volts Hz tab 83 volts per hertz limiter 193 Ww watchdog timer 69 worksheet 237 configuration 238 Rockwe
107. age sensing burden is lt 1VA per phase TIP For all wiring configurations the minimum voltage sensing threshold is 2V AC typical Maximum voltage withstand limit is 360V AC These limits are provided for reference only Metering accuracy applies only when operating in the range specified for voltage and frequency in the table above for the specified wiring configuration Generator Current Sensing Attribute 1407 CGCM Type 3 phase plus cross current compensation input Frequency 50 60 Hz Range 1 or 5 A max continuous Burden lt 0 1 VA per phase for metering CTs lt 2 5 VA per phase for cross current inputs Cross current compensation entity parameters ID 1A ID 5A ID Ui 12V Ci 14 1 nF li 5 AAC Li 1 5 pH 202 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Specifications Appendix D Bus Voltage Sensing Phase Wiring Grounded Voltage Frequency Configurations Connection Available Single V Bus A and No Min 57 Vrms Min 20 Hz phase V Bus C Max 150 Vrms Max 90 Hz Three Floating wye No Min 99 Vrms L L Min 20 Hz phase Max 208 Vrms L L Max 90 Hz Three Grounded wye Yes Min 99 Vrms L L Min 20 Hz phase grounded neutral Max 208 Vrms L L Max 90 Hz Three Open delta grounded Yes Min 99 Vrms L L Min 20 Hz phase B phase Max 150 Vrms L L Max 90 Hz Auxiliary Input Attribute 1407 CGCM Range 10 10V DC Input impe
108. an be determined by creating a step change in the voltage setpoint Increasing and decreasing the voltage setpoint creates the step change The typical change in setpoint is between 1 and 10 Observe the resulting generator response Observe the voltage overshoot and settling time and adjust the following gain settings to obtain the desired performance A typical test is to operate the generator at nominal voltage With a chart recorder or suitable voltage recording device monitoring the generator s output voltage initiate a change in the setting If the transient response observed has too much overshoot reduce the Kp value If the overshoot is small and the response is too slow increase the Kp value Increasing the Ki value decreases the time required to reach steady state To improve the transient response to a step change increase Ky If there is too much jitter in the steady state output decrease Ky Because all of these terms impact the characteristic response it is necessary to balance all three to obtain the desired generator response Start the Generator Follow these steps when starting the generator 1 Verify the appropriate measures have been taken to allow rotation of the prime mover and generator without applying excitation 2 Disable the excitation enable inputs to the CGCM unit 3 Start and accelerate the prime mover to synchronous speed Verify and Apply PMG Power Follow these steps to verify and apply PMG pow
109. apter 5 for more information on tuning the OEL control gains e Integral Gain Ki Sets the integral gain If the time to reach steady state is too long increase Ki The tag OEL_Ki in the Unscheduled Write table stores this parameter e Overall Gain Kg Sets the overall gain which determines the characteristic of the dynamic response when OEL is active If the transient response has too much overshoot decrease Kg If the transient response is too slow with little or no overshoot then increase Kg The tag OEL_Kg in the Unscheduled Write table stores this parameter Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 Under excitation Limiting The UEL gains determine the response of the UEL control loop for the voltage regulation function when UEL is active These settings can be adjusted during system startup Please refer to Chapter 5 for more information on tuning the UEL control gains Integral Gain Ki Sets the integral gain If the time to reach steady state is too long increase Ki The tag UEL_Ki in the Unscheduled Write table stores this parameter e Overall Gain Kg Sets the overall gain which determines the characteristic of the dynamic response when UEL is active If the transient response has too much overshoot decrease Kg If the transient response is too slow with little or no overshoot then increase Kg The tag UEL_Kg in the Unscheduled Write table stores this para
110. at a field over excitation voltage alarm is annunciated following the expected delay 5 Reset the field over excitation voltage setpoint to the desired level Generator Over voltage 59 Follow these steps to test that the Generator Over voltage function is working properly 1 Set the generator over voltage setpoint to a level that causes an alarm 2 Apply simulated generator voltage signals by using the test voltage source 3 Adjust the simulated generator voltage to exceed the generator over voltage setpoint 4 Verify that a generator over voltage alarm is annunciated following the expected delay 5 Reset the generator over voltage setpoint to the desired level Generator Under voltage 27 Follow these steps to test that the Generator Under voltage function is working properly 1 Connect a suitable load to the excitation output terminals of the CGCM unit 2 Increase the generator under voltage setpoint to a level that causes an alarm Enable excitation in FCR mode Clear the Engineldle tag in the controller tag database Apply simulated generator voltage signals by using the test voltage source Dy YY By a Adjust the simulated generator voltage below the generator under voltage setpoint 112 Rockwell Automation Publication 1407 UM001H EN P November 2014 7 8 CGCM Unit Startup Chapter 5 Verify that a generator under voltage alarm is annunciated following the expected delay Reset the gene
111. ation UEL operates in the area below the Armature Core End Iron Heating Limitation curve in the generator capability curve TIP The UEL function is not designed to prevent the loss of excitation function from operating A customizable UEL limiting curve is defined by a piecewise linear curve specified by five points you select as shown in the Typical UEL Limiting Curve diagram Generator is operating in the area of its characteristic curve below the UEL curve when the excitation current is less than the UEL curve the UEL alarm tag UEL_Active 1 In FCR mode UEL limiting is not active although the tag is set This tag is in the Scheduled Read table Rockwell Automation Publication 1407 UM001H EN P November 2014 53 Chapter3 CGCM Unit Operation Figure 34 Typical UEL Limiting Curve Real Power Generate W x 1000 0 0 7 5k 15 0k 22 5k 30 0k 37 5k 45 0k 0 0 8 z 2 5k S 50k 3 2 75 5 10 0k fo 2 125k o ic 15 0k Protection Functions The CGCM unit detects the fault conditions listed and described below Faults detected by the CGCM unit are communicated to the host Logix programmable controller Fault flags are communicated in the Scheduled Read table A fault flag is latched until the host controller resets it The host Logix controller can reset all CGCM unit faults by setting the tag FltReset 1 once the fault condition is cleared The CGCM unit automaticall
112. b are stored in the Unscheduled Write table and are not automatically written to the unit Refer to Chapter 6 for a discussion of user programming necessary to transfer these parameters AVR FCR Control The AVR FCR gains determine the response of the main control loop of the voltage regulation function The PID calculator software available in the Tools folder on the RSLogix 5000 software installation CDs can be used to assist in determining appropriate initial AVR gain settings for Kp Ki Kd and Kg These settings can be fine tuned during system startup Please refer to Chapter 5 for more information on tuning the regulator gains Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 Proportional Gain Kp Sets the proportional gain which determines the characteristic of the dynamic response to changes in generator voltage If the transient response has too much overshoot decrease Kp If the transient response is too slow with little or no overshoot then increase Kp The tag AVR_FCR_Kp in the Unscheduled Write table stores this parameter Integral Gain Ki Sets the integral gain If the time to reach steady state is too long increase Ki The tag AVR_FCR_Ki in the Unscheduled Write table stores this parameter e Derivative Gain Kd Sets the derivative gain To improve the transient response to a step change increase Kd If there is too much jitter in the steady state volta
113. ber 2014 173 Appendix Time Over current Characteristic Curves Figure 44 Time Characteristic Curve S2 Short Inverse 99 1595 similar to GE 5 67891 2 3 4 5 678910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 no Q 5 10 O eo LU 8 DN 7 Zz 6 wos 3 2 T j M 9 8 E 7 D 6 5 A 4 L 3 a 9 9 TEAN 90 2 a 8 0 Se 3 RJ TT 50 A Bm 4 0 09 3 0 08 lt o 2 0 06 o rH 05 1 0 04 5 0 5 03 02 01 5 67891 2 3 4 5 678910 20 30 40 50 609 2307 02 MULTIPLES OF PICK UP 174 Rockwell Automation Publication 1407 UM001H EN P November 2014 Time Over current Characteristic Curves Appendix A Figure 45 Time Characteristic Curve L L1 Long Inverse 9 9 1370 similar to ABB C05 5 6 7 8 91 2 3 4 5 678910 20 30 40 50 60 1000 900 800
114. block diagram for the CGCM unit Figure 27 Simplified Block Diagram MEMORY CIRCUITS FLASH MEMORY RAM EEPROM WATCH DOG la OPEN FLT gt TIMER Lp COLLECTOR OUTPUTS RD RLY gt VREF 1 gt i dr LOAD apc H Lg gt VREF gt SHARING DAC LS gt COMO FACTORY TEST PORT EXD gt Xeon gt MICROPROCESSOR I COMMU Ji gt COM1 REDUNDANCY PORT EX D gt ENABLE NICATIONS gt CONTROLNET 1 5 CROSSCURRENT m CHOPPER i EXC gt GENERATOR LINE CURRENT gt ANALOG gt PWM H EXC 1 gt INPUT GENERATOR VOLTAGE CIRCUITS BUS VOLTAGE gt I 1 OPERATING DIGITAL POWER ADC gt SIGNAL i PMG INPUTS PROCESSOR i gt 5 POWER gt 12 CONTROL POWER 24V DC gt SUPPLY 12 1 gt 24 i Rockwell Automation Publication 1407 UM001H EN P November 2014 37 Chapter3 CGCM Unit Operation Inputs and Outp uts The figure below shows the front panel layout of the CGCM unit Input and output connections are made through the terminal blocks TB1 TB7 Figure 28 Front Panel Layout J De ov Re Sp ea 5 Combination Generator o Module Manufactured by Beaster Electric Analog Inputs The CGCM unit provides a number of analog inputs for use in the regulation and control of stand alone an
115. c response to a change in the VAR setting VAR Traverse Rate This parameter determines the time measured in seconds for the setpoint to move from zero to the rated generator KVA It determines how fast the regulator changes the VAR setpoint from the tracking value to the operating setpoint when the Regulator Operating mode changes to VAR PF_VARAuxGain This tag lets you adjust the overall gain of the auxiliary input s control on the VAR PF operating modes The units for the var controller are percent of nominal per volt A setting of one results in the controlled parameter being changed by one percent of the nominal value for each volt applied to the auxiliary input For PF control the units are 0 01PF per volt A setting of 5 results in the regulated PF being changed by 0 05 for each volt applied to the auxiliary input Outputs from the CGCM Unit The VAR mode has these outputs PF_VAR Selection This tag reports the selection of PF or VAR control see PF VAR Select PF VAR Control This tag reports your selection of PF VAR or AVR FCR mode Rockwell Automation Publication 1407 UM001H EN P November 2014 Detailed CGCM Unit Tag Descriptions Appendix E Excitation Control Features This section describes the excitation control features Soft Start Inputs to the CGCM Unit e SoftStart_InitLevel This tag configures the generator voltage that is generated immediately after enabling the CGCM unit This parameter is based on
116. c unstable Gain mis adjusted Check gains entered into CGCM unit configuration Calculate adjust as required Wiring error Table 20 Excitation Control AVR Symptom No excitation current output 154 Most Likely Cause Excitation is not enabled Check wiring for excitation enable excitation current output fuses open grounding and PMG supply Diagnostic Action Check excitation enable hardware and software and AVR select Correct wiring as required Corrective Action Correct Logix controller logic or 1 0 as required Wiring error Check wiring for excitation enable Correct wiring as required excitation current output VT inputs fuses open grounding and PMG supply No supply PMG power Measure Voltage at CGCM unit Correct supply anomaly if PMG supply input terminals Rockwell Automation Publication 1407 UM001H EN P November 2014 insufficient voltage is measured Troubleshooting Chapter 7 Table 20 Excitation Control AVR Symptom Voltage output is less than setpoint Most Likely Cause AVR not selected enabled Diagnostic Action Check excitation enable hardware and software and AVR select Corrective Action Correct Logix controller logic or 1 0 as required Wiring error Check wiring for excitation enable excitation current output VT inputs fuses open grounding and PMG supply Correct wiring as required Insufficient
117. can damage integrated circuits or A semiconductors Follow these guidelines when you handle the module Touch a grounded object to discharge static potential e Wear an approved wrist strap grounding device e Do not open the module or attempt to service internal components e If available use a static safe workstation e When not in use keep the module in its static shield bag Recommended Equipment You need the following equipment to help in the startup of the CGCM unit Programming Terminal A suitable programming terminal typically a notebook personal computer with RSLinx RSLogix 5000 and RSNetWorx for ControlNet software is required The programming terminal must be equipped with a suitable interface to support communication with the Logix controller A typical communication interface can be a ControlNet network interface card catalog number 1784 PCC and its cable Two channel Chart Recorder or Other Suitable Data Recording Method A two channel recorder or other suitable method is recommended for the verification procedure Chart recorder connections vary depending on the test being performed 108 Rockwell Automation Publication 1407 UM001H EN P November 2014 Recommended Start up Procedure CGCM Unit Startup Chapter 5 Test Current and Voltage Source An appropriately calibrated 3 phase voltage and 3 phase current source is recommended to simulate generator and system power conditions at known operating points o
118. cation 1407 UM001H EN P November 2014 149 Chapter 6 CGCM Unit Software Interface Table 18 Unscheduled Configuration Read Write Data Table Assembly Instance 4 Byte Size in Type Bits Tag Name Description Units Range Error Code Bytes 88 2 INT N A ExciterPole Exciter Pole Poles 2 24 52 90 2 INT N A Rev_kW_Setpt Reverse kW Setpoint 100 100 10 000 53 92 2 INT A Rev_kW_TimeDly Reverse kW Time Delay s 100 10 30 000 54 94 2 INT N A Rev KVAR Setpt Reverse kVAR Setpoint 100 100 10 000 55 96 2 INT N A Rev_kVAR_TimeDly Reverse KVAR Time Delay s 100 10 3000 56 98 2 INT N A OvrFreqSetpt Over frequency Setpoint Hz 100 3000 7000 57 200 2 INT N A OvrFreqTimeDly Over frequency Delay s 100 10 30 000 58 202 2 INT N A UndrFreqSetpt Under frequency Setpoint Hz 100 3000 7000 59 204 2 INT A UndrFreqTimeDly Under frequency Delay s 100 10 30 000 60 206 2 INT A Ovr I Setpt Over current Setpoint 100 1000 32 000 61 208 2 INT N A Ovr_l_TimeDly Over current Time Delay Time 0 990 62 dial setting 100 210 2 INT A Ovr Curve Over current Curve 1 17 63 212 2 INT N A Ovr_ _VrestSetpt Over current Voltage 100 0 20 000 64 Restraint Setpoint 214 2 INT N A Spare13 65 216 2 INT N A L
119. ce Chapter 6 Byte Size Type Bits Tag Name Description Units Range in Bytes 2 1 Bool 0 Spare2 Boo 1 Spare3 Boo 2 Engineldle Engine Idle 0 False 1 True Boo 3 Spare4 Boo 4 PF VAR Select Power Factor VAR Select 0 PF 1 VAR Boo 5 PF VAR En Power Factor VAR Enable 0 Disabled 1 Enabled Boo 6 AVR FCR Select Automatic Voltage O AVR 1 FCR Regulator Field Current Regulator Select Boo 7 FltReset Fault Reset 0 De assert 1 Assert 3 1 Boo 0 AutoSyncEn Auto Synchronization Enable 0 Disabled 1 Enabled Boo 1 CheckSyncEn Check Synchronization Enable Boo 2 PermissiveSyncEn Permissive Synchronization Enable Boo 3 Spare5 Boo 4 Spare6 Boo 5 Bus A B Select Bus A B Select 0 Bus A 1 Bus B Boo 6 DeadBusClosureEn Dead Bus Closure Enable 0 Disabled 1 Enabled Boo 7 InitiateSync Initiate Synchronization Q Inactive 1 Active 4 1 Boo 0 Clear_kW_Hrs Rev 2 x Set Clear kW Hours 0 De assert Set KW Hrs Rev 3 x or later 1 Assert Boo 1 Clear KVAR Hrs Rev 2 x Set Clear KVAR Hours Set KVAR Hrs Rev 3 x or later Boo 2 Clear KVA Hrs Rev 2 x Set Clear KVA Hours Set KVA Hrs Rev 3 x or later Boo 3 Spare7 Boo 4 Droop CCC Select Droop Cross Current 0 Droop 1 CCC Compensation Select Boo 5 V_DroopEn Voltage Droop Enable 0 Disabled 1 Enabled Boo 6 Spare8 Boo 7 SoftwareExcEn Software Excitation Enable 0 Disabled 1 Enabled
120. ce is required above and below the unit when mounted Overall dimensions for the unit are shown in CGCM Unit Overall Dimensions on page 14 WARNING Explosion Hazard e Substitution of components can impair suitability for Class I Division 2 e Do not replace components or disconnect equipment unless power has been switched off or the area is known to be non hazardous e Do not connect or disconnect components unless power has been switched off or the area is known to be non hazardous e This product must be installed in an enclosure All cables connected to the product must remain in the enclosure or be protected by conduit or other means e All wiring must comply with N E C article 501 4 b Rockwell Automation Publication 1407 UM001H EN P November 2014 13 Chapter2 Installation Figure 1 CGCM Unit Overall Dimensions 9 75 247 7 9 00 228 6 0 38 9 5 1 00 25 4 6 00 152 4 14 00 355 6 6 00 152 4 lt 0 281 7 1 0 75 19 1 NOTES 1 DIMENSIONS ARE IN INCHES MILLIMETERS 6 26 159 0 14 Rockwell Automation Publication 1407 UM001H EN P November 2014 Installation Chapter 2 Electrical Connections The CGCM unit s connections are dependent on the application and excitation scheme All inputs or outputs cannot be used in a given installation Incorrect wiring can result in damage to the unit Connect the CGCM unit s terminals with copper wire rated for a mini
121. ct wiring as required voltmeter at CGCM unit PMG input erminals PMG failure Check PMG supply Measure with Repair as required p voltmeter at CGCM unit PMG input erminals Incorrect configuration Check single phase versus 3 phase Correct as required selection Reverse var 400 Under excitation Check UEL configuration if required Correct as required Incorrect operating mode selected Check selected operating mode for Select as appropriate operating requirements Over frequency 810 Governor error Correct as required Under frequency 81U Governor error Correct as required Reverse power 32R 166 Governor error Rockwell Automation Publication 1407 UM001H EN P November 2014 Correct as required Troubleshooting Chapter 7 Table 35 Protection Symptom Most Likely Cause Diagnostic Action Corrective Action Rotating diode monitor Failed diode Remove and test diodes Replace diode Incorrect configuration Confirm test set up of diode Correct as required monitor parameters with active parameters Insufficient number of fly back Check number of external flyback Install as required diodes installed diodes installed at CGCM excitation output if required Phase rotation error 47 Wiring error See troubleshooting voltage Correct wiring as required metering Generator over current 51 Fault or large load condition Incorrect c
122. ction This sets the value of the RedndtTrackDelay tag in the Configuration table expressed in seconds Its purpose is to reduce the likelihood that the short term response of the active CGCM unit s Regulating mode to an upset will be transferred to the back up CGCM unit when it becomes primary The redundant tracking function performs in a similar fashion to the internal tracking example above Increasing the redundant tracking rate makes the tracking function less responsive to changes in the regulator output by reducing the slope of the tracking function Increasing the tracking delay offsets the tracking response to the right in the figure Traverse Rates These parameters adjust how fast the regulator changes its operating point from one setpoint the tracking value to another when changing regulator operating modes In general the lower the rate the faster the regulator operating point changes A value of 200 puts the regulator in Hold mode and prevents the field current from changing when the Regulator Operating mode is changed Please refer to Chapter 3 for more information AVR Control Traverse Rate Sets tag AVR Traverse Rate in the Configuration table This parameter determines the time measured in seconds for the setpoint to move from zero to the rated generator voltage It determines how fast the regulator changes the voltage setpoint from the tracking value to the operating setpoint when the Regulator Operating mode chan
123. d in tag LossExc_I_TimeDly in the configuration table e Rotating Diode Fault Main Pole Indicates the number of poles of the main field of the generator Stored in tag MainPole in the configuration table e Rotating Diode Fault Exciter Pole Indicates the number of poles of the exciter field of the generator Stored in tag ExciterPole in the configuration table e Rotating Diode Fault Open Diode Level Establishes the percent ripple at which the rotating diode monitor alarm turns on when an open diode condition occurs This parameter is stored in tag OpenDiodeMonitorLevel in the configuration table and is expressed in percent of maximum ripple current e Rotating Diode Fault Shorted Diode Level Establishes the percent ripple at which the rotating diode monitor alarm turns on in the event a shorted diode condition occurs Tag ShortedDiodeMonitorLevel in the configuration table stores this value expressed in percent of maximum ripple current Rockwell Automation Publication 1407 UM001H EN P November 2014 81 Chapter 4 82 CGCM Unit Configuration e Rotating Diode Fault Delay Establishes the time duration that the ripple current must be at or above the fault level before the CGCM unit annunciates a rotating diode fault Tag DiodeMonitorTimeDelay in the configuration table stores this value expressed in seconds TIP Refer to Chapter 5 for more information on configuring rotating diode protection parameters Excitatio
124. d paralleled generator systems Each of the inputs is outlined below Generator Voltage Sensing Inputs The CGCM unit senses generator voltage through voltage transformers VTs installed across the generator output leads 38 Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Operation Chapter 3 The CGCM unit uses voltages measured through the generator voltage sensing inputs for generator voltage VAR and or power factor regulation kW and KVAR load sharing synchronization metering and protection The inputs accept signals with up to 40 Total Harmonic Distortion THD and are connected for single phase and 3 phase applications The generator voltage inputs are internally scaled by the CGCM unit according to its transformer configuration settings Generator voltage sensing inputs are labeled V Gen A V Gen B V Gen C and V Gen N Bus Voltage Sensing Inputs Voltages measured through the bus voltage sensing inputs are used for generator to bus synchronizing The CGCM unit senses bus voltage through VTs Depending upon the number of busses and the type of synchronizing required there is one or two sets of bus sensing transformers If dual bus synchronizing is required the sensing transformer configuration is limited to single phase In a single breaker system the inputs are connected in either single phase or 3 phase configurations The inputs accept signals with up to 40 THD The bus voltage inputs are int
125. dance 20kQ Communication Ports Attribute 1407 CGCM ControlNet network Contro Net 1 5 interface Redundancy port DB9 Connector 9600 bps 8N1 For redundant CGCM unit use only Factory port DB15 Connector 9600 bps 8N1 Not for customer use Rockwell Automation Publication 1407 UM001H EN P November 2014 203 Appendix D 204 Specifications Remote Excitation Enable Input Attribute o Taree Voltagerating f2avbenm Input impedance 5 6K Q Logical high voltage min 18V DC Logical low voltage max 5V DC Open Collector Outputs fault relay and redundancy relay Attribute 1407 CGCM Voltage rating 24V DC nom Voltage range 18 30V DC Rated current max 500 mA Field Output Attribute 1407 CGCM Continuous voltage 32 63 125V DC Continuous current 15 ADC 10 second forcing voltage 50 100 or 200V DC 10 second forcing current 30 A DC Field resistance min 32V DC 213Q 63V DC 42Q 125V DC 83Q 1 Available output voltage is dependent on magnitude of excitation power input voltage Rockwell Automation Publication 1407 UMO001H EN P November 2014 Specifications Appendix D Regulation The following modes are used to regulate the CGCM unit AVR Operating Mode e Accuracy 0 25 over the load range at rated power factor and constant generator frequency e Steady State Stability 0 1 at constant load and generator frequency e Temperature Drift The maximum error du
126. ddress Steady off 3 View independently Channel disabled or not supported Flashing red and green 6 Invalid link configuration Flashing red 7 Link fault or no frames received Flashing green 8 Temporary channel error or listen only Steady green 9 lowest Normal operation TIP A test sequence is performed on this status indicator during startup Table 32 Network Status Indicator A B Series D units Status Indicator Aand B Of Status Indicator State Description Not online No power Flashing Red 1 Hz Incorrect node configuration duplicated MAC ID Al ernating Red Green Self test of bus controller Re d Fatal event or faulty unit AorB Of Channel is disabled Al ernating Red Green Invalid link cofiguration Flashing Green 1 Hz Temporary errors node self corrects or node is not configured to go online Green Normal operation Flashing Red 1 Hz Media fault or no other nodes on the network Rockwell Automation Publication 1407 UM001H EN P November 2014 Troubleshooting Chapter 7 Table 34 Redundancy Symptom Both CGCM units operate as primary both provide excitation to the generator Table 33 Module Status Indicator MS Series D units Status Indicator Description State Off No power Green Operating in normal condition controlled by a scanner in Run state Flashing Green 1 Hz The module is not configured or
127. dium Current Time 0 120 seconds t CONTINUOUS Low Current Level Current Level 0 0 20 A de 0 0 15 A de Chapter 4 High Current Level 0 0 30 A de TIME IN SECONDS Point A is defined by tags OEL_OnlineHiSetpt and OEL_OnlineHiTimeDly Point B is defined by OEL_OnlineMedSetpt and OEL_OnlineMedTimeDly Point C is defined by OEL_OnlineLoSetpt Figure 38 Offline OEL Configuration __ High Current Time FIELD CURRENT CONTINUOUS gt 0 10 seconds Low Current Level 0 15A de High Current Level 0 30 A de TIME IN SECONDS Point D is defined by OEL_OfflineHiSetpt and OEL_OfflineHiTimeDly Point E is defined by OEL_OfflineLoSetpt Online Offline graph button Toggles to show online or offline OEL characteristics The graph pictorially represents the OEL settings Validate and Graph button Updates the graph in the OEL tab after entering new values Related Parameters GenRatedExcI e OEL En tag in the Output table Rockwell Automation Publication 1407 UM001H EN P November 2014 85 Chapter 4 86 CGCM Unit Configuration UEL Tab The UEL tab is used to configure the unit s settings related to operation of the Under excitation Limiting UEL function The values entered in this tab establish break points in a piecewise linear curve that defines the characteristic curve for this function See the
128. dule is created Disable keying the inserted module does not reject a connection to the controller An I O module that is connected in a ControlLogix system compares the following information for itself to that of the original configuration e Vendor Product type e Catalog number e Major revision This feature can prevent the inadvertent operation of a control system if a CGCM unit is replaced with an incompatible unit Device Setup You must configure the CGCM unit for the unit to function Configuration tabs in the module set up screen divide the required information into sub categories Evaluate the system and generator information to determine the appropriate configuration settings and use the configuration tabs to enter the settings TIP Some screens shown in this document can vary slightly from the RSLogix 5000 software that is currently provided Please review each screen carefully Applying the Configuration to the CGCM Unit The configuration tabs provide a simple way for you to enter and edit CGCM unit configuration parameters Changes you make to the configuration are not always immediately sent to the unit The configuration data is stored in two controller tags in the ControlLogix controller the Configuration tag and the Unscheduled Write tag Refer to Chapter 6 for details on these data tags The Unscheduled Write tag contains the parameters from the Gain tab along with the Line Drop Voltage Compensation from the
129. e frequency error generator frequency and selected bus frequency reported by CGCM unit during synchronization If no frequency error is reported by CGCM unit correct wiring and verify appropriate Synchronization mode is active If frequency error reported verify governor is responding to CGCM unit reported error Sync parameter configuration incorrect Observe configured synchronization limits VT input configuration and generator rated entries Rockwell Automation Publication 1407 UM001H EN P November 2014 Correct any errors in the configuration entries 161 Chapter7 Troubleshooting Table 29 Synchronizing Symptom No close indication from CGCM unit cont Most Likely Cause Diagnostic Action Corrective Action Voltage not matched Observe voltage match tag during If voltage match indicated check synchronization close command tag If no voltage match indicated check voltage match error Observe voltage error generator If no voltage error is reported by voltage and selected bus voltage CGCM unit correct wiring and verify reported by CGCM unit during appropriate Synchronization mode is synchronization active If voltage error is reported verify voltage setpoint to CGCM unit is being adjusted appropriately to provide voltage correction Close indication from CGCM unit when sync parameters not met Table 30 Metering Symptom Voltage does not read correctly 162
130. e maximum per unit load share error reported to the host controller The tag LSLimit in the configuration table stores this value expressed in per unit power Rate Sets the maximum change in the load share error per CGCM unit update cycle The tag LSRate in the configuration table stores this value expressed in seconds per rated watts Related Parameters e GenRated W Rockwell Automation Publication 1407 UM001H EN P November 2014 99 Chapter 4 CGCM Unit Configuration 100 Voltage Tab The Voltage tab is used to configure the unit s parameters related to the voltage protection and compensation functions Excitation Volts Hz Gain Tracking Load Share Synch Power UEL QEL Fault Relay General Connection Module Info Generator Transformers Voltage Current Frequency Over Voltage Setpoint 110 0 of Rated Volts Delay 1 0 sec Under Voltage Setpoint 85 0 of Rated Valts Delay 20 0 sec Droop Percentage 5 0 Over voltage Voltage Compensation Unscheduled Write Line Drop Voltage Compensation 0 0 A Voltage Compensation Data will be applied to UnschWrite member in Configuration Tag The tag values of the UnschWrite member must then be transferred to the module via user logic When applying changes made to the fields on this tab while excitation is enabled any error message which indicates that the configuration was not applied do
131. e of the unit and to the CH GND terminal with 1 6 mm 14 AWG copper wire When installed in a system with other CGCM units use a separate lead to the ground bus from each unit AC Voltage and Current Sensing The CGCM unit supports generator and bus voltage sensing and generator current sensing Generator and Bus Voltage Sensing CGCM units accept single phase or 3 phase generator and bus voltage sensing input with nominal voltages of 120 or 208V AC Refer to Terminal Block Label Description on page 15 for possible wiring configurations The terminals found on TBS provide connections for generator voltage sensing and are labeled V GEN A V GEN B V GEN C and V GEN N The terminals found on TB6 provide connections for bus voltage sensing and are labeled V BUS A V BUS B V BUS C and V BUS N The connection examples below show typical connections for various generator and bus connection schemes The CGCM unit supports these generator connection schemes e Single phase Delta or Two transformer Open Delta Three wire Wye e Four wire Wye The CGCM supports these bus connection schemes e Single phase Delta or Two transformer Open Delta Three wire Wye e Four wire Wye Dual Breaker Single phase only Rockwell Automation Publication 1407 UM001H EN P November 2014 Installation Chapter 2 Generator Current Sensing CGCM units provide 3 phase AC current sensing with provisions for 1 A and 5 A nominal sensing
132. e particular curve R Constant defining the reset time These equations comply with IEEE Standard C37 112 1996 The 51P and 51N Time Characteristic Curve Constants table lists the time characteristic curve constants Rockwell Automation Publication 1407 UM001H EN P November 2014 169 Appendix Time Over current Characteristic Curves Table 36 51P and 51N Time Characteristic Curve Constants Curve Curve Name Trip Characteristic Constants Reset Selection A B C N K R 1 S Short Inverse 0 2663 0 03393 1 000 1 2969 0 028 0 5000 2 S2 Short Inverse 0 0286 0 02080 1 000 0 9844 0 028 0 0940 3 L1 Long Inverse 5 6143 2 18592 1 000 1 000 0 028 15 750 4 L2 Long Inverse 2 3955 0 00000 000 0 3125 0 028 7 8001 5 D Definite Time 0 4797 0 21359 000 1 5625 0 028 0 8750 6 M Moderately Inverse 0 3022 0 12840 1 000 0 5000 0 028 1 7500 7 Inverse Time 8 9341 0 17966 1 000 2 0938 0 028 9 0000 8 Inverse Time 0 2747 0 10426 000 0 4375 0 028 0 8868 9 V Very Inverse 5 4678 0 10814 1 000 2 0469 0 028 5 5000 10 V2 Very Inverse 4 4309 0 09910 1 000 1 9531 0 028 5 8231 11 Extremely Inverse 7 1624 0 02758 000 2 0938 0 028 7 7500 12 E2 Extremely Inverse 4 9883 0 01290 1 000 2 0469 0 028 4 7742 13 Standard Inverse 0 01414 0 00000 1 000 0 0200 0 028 2 0000 14 B Very Inverse It 1 4636 0 00000 1 000 1 0469 0 028 3 2500 5 Ext
133. e stores this parameter Line Drop Voltage Compensation Establishes the output voltage increase at rated current Tag LineDropComp in the Configuration table stores this parameter Related Parameters GenRated_V GenRated_I GenRated_W SoftStartTime Engineldle Rockwell Automation Publication 1407 UM001H EN P November 2014 101 Chapter4 CGCM Unit Configuration Current Tab The Current tab is used to configure the CGCM unit parameters related to the over current protection function Refer to Appendix A for more information on setting the parameters in the Current tab as well as the available time over current characteristic curves a Module Properties Report CNBR 1407 CGCM 4 1 xa General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking Load Share Synch Voltage Current Frequency Power UEL QEL Fault Relay Over Current 105 0 Over Current Setpoint Rated 10 Curve 1 Time Dial 0 5 102 Voltage Restraint Status Offline 0 0 Rated Y 0 1 Time Out sec 100 Multiple of Setpoint Solid Curves Time Dials Over current e Setpoint Establishes the over current threshold When the generator current exceeds this threshold the CGCM unit starts timing toward a trip based on the selected over current curve voltage restraint setting and time dial setting Tag Ovr_I_Setpt stores this parameter expressed in percen
134. e to temperature drift will be 0 005 of full scale per degrees Celsius for voltage and current measurements and 0 010 of full scale per degree Celsius for watt and VAR measurements e V Hz Characteristic Slope from 0 to 3PU is adjustable in 0 1PU increments Two knees and two slopes are available Response Time lt 1 cycle FCR Operating Mode e Accuracy 1 of rated current VAR Operating Mode e Accuracy 0 4 of the nominal VA rating at the rated frequency Power Factor Mode e Accuracy 0 02 of the PF setpoint for the real power between 10 100 at the rated frequency Parallel Compensation Attribute 1407 CGCM Modes Reactive Droop Reactive Differential cross current Droop adjust range 0 30 Accuracy 0 3 of rated cross current input current Line drop compensation range 0 10 of rated voltage in 0 1 increments Loss of Excitation Attribute Increment Pickup 0 1 15A 0 1A Time delay 0 1 9 9s 0 15 Rockwell Automation Publication 1407 UM001H EN P November 2014 205 Appendix D 206 Specifications Over excitation Voltage Protection Pickup 1 200V DC 1V DC Time delay 0 1 30s 0 1s Over current Protection Attribute Range Increment Accuracy Pickup 10 320 of rated 1 2 rated current generator current Time delay Characteristic inverse 0 1 s per ANSI C50 13 configurable Under voltage Protection Attribute Accuracy 60 100
135. ed V Hz upper knee frequency Verify the voltage decreases at the configured upper slope rate 3 Adjust the prime mover speed down to below the configured V Hz lower knee frequency Verify the voltage decreases at the configured lower slope rate Under excitation Limiting UEL Operation Perform this test with the generator operating in parallel droop or PF VAR control with a large power source that is maintaining constant voltage Follow these steps to test the UEL operation 1 Disable the UEL function 2 Set the online under excitation limit for 5 VARs into the generator 3 Adjust the VARs into the generator for 15 at 25 load to create an under excited condition 4 Enable the UEL function This creates a step change into the UEL limit 5 Observe the response of the excitation current reported by the CGCM unit 6 Adjust the UEL gains as required to obtain the desired stable response 7 Verify stable performance of the UEL by testing the machine from 25 100 real power loading while under excited 8 Increase the excitation above the UEL limit 9 Return the UEL settings to the values determined for the application Rockwell Automation Publication 1407 UM001H EN P November 2014 123 Chapter5 CGCM Unit Startup Over excitation Limiting OEL Operation Perform this test with the generator operating unloaded in Constant Speed mode and constant voltage AVR mode Follow these steps to test the OEL operat
136. eduled data transfers to occur General Excitation Control This section describes the excitation control modes inputs and outputs for the Modes CGCM unit Inputs to the CGCM Unit e SoftwareExcEn This tag is controlled by the host Logix controller and if set to 1 provides one of the necessary conditions for the field excitation to be enabled Outputs from the CGCM Unit Internal Tracking En When this tag is set to I the CGCM unit enables internal tracking between the various regulating modes InternalTrackRate This tag configures the rate at which the tracking mode of the CGCM unit matches the non active excitation control modes to the active excitation control mode InternalTrackDly This tag changes the initial delay of the tracking function of the CGCM unit to prevent the Tracking mode from adjusting the non active modes into an undesirable condition For example while the unit is operating in AVR mode the sensing VT fails to open If the CGCM unit s Tracking mode were allowed to instantly track the full on condition created by the loss of sensing the transfer to the CGCM unit s Manual mode results in an undesirably high generator voltage even when operating in FCR mode Adding a tracking delay enables the unit to transfer to a different Regulating mode without letting the CGCM unit follow into a potentially undesirable operating point 214 Rockwell Automation Publication 1407 UM001H EN P November 2014 Deta
137. el ripple Number of main poles N A Number of exciter poles N A Table 49 Volts Hz Tab Parameter units i Seiya V Hzupperknee frequency nm sti lt i iS V Hz upper slope p u V p u Hz V Hz lower knee frequency Hz V Hz lower slope p u V p u Hz Figure 70 Under frequency Slope and Knee Voltages 100 90 80 70 60 50 40 30 20 10 0 Voltage Underfrequency Slope 10 50 60 70 80 90 Frequency Hz Rockwell Automation Publication 1407 UM001H EN P November 2014 239 Appendix F Configuration Record Worksheet Table 50 Over excitation Limiting OEL Tab Parameter Units Setting Online high level setpoint A DC Online high level time delay s Online medium level setpoint ADC Online medium level time delay s Online low level setpoint ADC Offline high level setpoint ADC Offline high level time delay S Offline low level setpoint ADC Figure 71 Offline Over excitation Limiting FIELD CURRENT Figure 72 Online Over excitation Limiting High L Current Time FIELD CURRENT 0 10 seconds Medium Current continuous Iw Time Current Level 0 120 seconds 0 0 15 Adc y77777 er High i Current High Low Level I Current CONTINUOUS Current 0 30 A de Time Level 0 10 seconds 0 15 Adc TIME IN SECONDS Hig Current Medium Level Current 00 30 A de
138. ell Automation Publication 1407 UM001H EN P November 2014 71 Chapter 4 CGCM Unit Configuration e Generator capability curve e Generator decrement curve Consult with the generator manufacturer to be sure that you have the correct data Record System Parameters Verify and record system information and generator information required for configuration of the CGCM unit Typically this information can be obtained from the generator nameplate manufacturer s data sheets and system electrical drawings Equipment Required You need a suitable personal computer running RSLogix 5000 software The software is used to configure the CGCM unit for desired operation RSLogix 5000 software contains a device profile that provides a user interface to the CGCM unit configuration Refer to the CGCM Release Notes publication 1407 RN001 for information on compatible RSLogix 5000 software versions and ControlLogix controller firmware revisions Create a New Module in Follow these steps to create a new module in the ControlLogix controller with the ControlLogix Controller 72 RSLogix 5000 software IMPORTANT You must be offline when you create a new module 1 Under I O Configuration right click 1756 CNB R and choose New Module from the menu 2 43 1 0 Configuration 9 1 1756 ENET 7 4 ENET f 2 1756 DNB DNET 4 1756 DHRIO B DHRIO I 5 1756 CNBR D JE 14070 MAE gt tr PS The Select Module
139. em LIA L2A L3A LIB L2B L3B VBus A VBus B oO VBus C VBus N TB6 o VGenB o VGenc o VGen N TB5 To optional cross current reactive compensation loop let bY i Po pe Be pa 13 5A 113 od 12 1A O 1 hr Pfft E ian w E H Ren o TB3 Customer Supplied CT A Shorting Switch or Test Cross current CT input Block not required for parallel droop operation 28 Rockwell Automation Publication 1407 UM001H EN P November 2014 L1 L2 L3 Installation Chapter 2 Figure 16 Voltage and Current Connection for Single Phase Bus and Single phase Generator System ID 1A ID 5A ID 13 4 1 A 13 5 A 13 12 1 A 12 5 A 12 1 1A 5 A Customer Supplied CT Shorting Switch or Test Cross current CT input Block not required for parallel droop operation Rockwell Automation Publication 1407 UM001H EN P November 2014 29 Chapter 2 30 Installation Figure 17 Current Connections for 3 phase Delta Generator with Two CTs The connections shown in this diagram can be used if only two CTs are available in the generator circuit Two CTs can be used only with a three wire delta generator The circuit shown in this diagram can be substituted for the CT connections shown in Figures 9 1 1 14 and 16 1A 5A 1A 5A 1A 5A Customer Supplied CT Shorting Switch or Test C Block
140. emes are described below e 3 phase In this scheme the 3 phase output of the generator and all three phases of the reference system are connected to the CGCM unit This lets the CGCM unit match voltage frequency phase and phase rotation of the generator to the reference system The 3 phase scheme provides the CGCM unit with the most power system data allowing it to perform the most thorough synchronization To enable a 3 phase connection the user selects the Generator and Bus VT Configurations as two transformer open delta three wire wye or four wire wye When synchronizing delta systems the CGCM unit uses line to line voltage for voltage frequency and phase matching When synchronizing wye systems the CGCM unit uses line to line voltage for voltage and frequency matching and line to neutral voltage for phase matching Dual Bus The CGCM unit has the ability to synchronize a generator to either one of two reference busses The CGCM unit supports this by monitoring one line to line phase of the two reference busses The user must select the appropriate bus for synchronization It is not possible to synchronize to two different busses at the same time For dual bus synchronization the 3 phase output of the generator and a single phase from each reference bus are connected to the CGCM unit This lets the CGCM unit match voltage frequency and phase but not phase rotation of the generator to the reference system However the C
141. ency Tag DeadbusGenFreqHiLimit e Min Voltage Tag DeadbusGenV LoLimit expressed in volts e Max Voltage Tag DeadbusGenV_HiLimit IMPORTANT Prior to Host FRN 4 9 regardless of the setting of the DeadbusGenFreqLoLimit parameter the CGCM unit disables synchronization when the generator frequency is below 45 Hz Rotation Generator Specifies the generator phase rotation Configuration table tag GenRotABC_ACB Select stores this value 0 ABC 1 ACB e Bus Specifies the bus phase rotation Configuration table tag BusRotABC_ACB Select stores this value 0 ABC 1 ACB Related Parameters e GenVT_Config BusVT_Config GenRated_V Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 Load Share Tab The Load Share tab is used to configure the unit s parameters related to the real power load sharing function of the unit a Module Properties Report CNBR 1407 CGCM 4 1 Sc Voltage l Current Frequency Power al VEL m als n OEL m m a Fault Relay General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking Load Share Synch Full Scale Voltage 4 0 Volts Limit 0 3 PU Rate 10 0 sec Rated Watts e Full Scale Voltage Sets the load share output voltage when the generator is producing rated real power The tag LS_FS_V in the configuration table stores this value expressed in volts e Limit Sets th
142. epts against Correct as required reactive capability curve Metering error See Metering troubleshooting See Metering troubleshooting Excitation is unstable when UEL is active UEL Gain misadjusted Force into UEL Rockwell Automation Publication 1407 UM001H EN P November 2014 Adjust gains as required 159 Chapter7 Troubleshooting Table 27 Limiting Modes OEL Symptom Excitation Current exceeds the programmed OEL limit OEL does not limit activate Most Likely Cause Diagnostic Action Corrective Action OEL not enabled Check tag OEL_En and configuration Correct logic or configuration as required OEL Gain misadjusted Force into OEL Adjust gains as required OEL not configured Check OEL settings against generator Correct as required excitation requirements limits Metering error See Metering troubleshooting See Metering troubleshooting Excitation is unstable when OEL is active OEL Gain misadjusted Table 28 Real Power Load Sharing Symptom Units do not share load Most Likely Cause Load share lines not properly connected Force into OEL Diagnostic Action Measure voltage at each LS terminal Verify voltage represents PU load Adjust gains as required Corrective Action Re connect LS lines Open LS terminals apply a load measure LS voltage Voltage equals kW Rated W LSFSVoltage If Voltage not correct replace
143. er 1 Rotate the generator at rated speed 2 Measure the PMG voltage and compare with generator manufacturer s data to be sure PMG voltage is as expected 3 Apply the PMG supply voltage at the CGCM unit s PMG input terminals Verify and Adjust FCR Operation Follow these steps to verify and adjust the FCR operation 1 Select the FCR mode of operation 2 Set the FCR setpoint to the generator manufacturer s specified no load exciter field current 3 Enable the CGCM unit excitation 4 Monitor the generator exciter field current exciter field voltage and generator voltage Rockwell Automation Publication 1407 UM001H EN P November 2014 117 Chapter 5 118 CGCM Unit Startup 7 Verify that the configured soft start occurs and the generator voltage increases to near the specified rated output voltage Adjust the FCR setpoint and verify that the metered field current responds as desired Adjust gains as required to achieve the desired result Verify Metered Voltages and Phase Rotation Follow these steps to verify metered voltages and phase rotation 1 2 Observe the reported phase rotation for the generator Confirm that the metered rotation matches the configured rotation and that no phase rotation fault exists Measure the VT inputs at the CGCM unit s VT input terminals and verify that they are correct for the selected wiring configuration Verify that the phase line and avera
144. er 2014 Field Current Regulator CGCM Unit Math Models Appendix B Per unit Block Diagram for Rotating Rectifier Excitation System shows the model of the CGCM field current regulator used with a brush type rotating exciter Vp is the input from the power source for the excitation system Typical value for Ta is 0 The forcing limit Vpy yr is related to the power input voltage Vp to the CGCM the exciter field voltage Vp and the programmed gain Kg in this equation The gain Kg is used for compensating variations in system configuration dependent gains such as power input voltage The PI gains Kp and Kj are the same as the PI gains Kp and Kj for the voltage regulator The PID gains can be obtained from the PID Calculator software available from Rockwell Automation Figure 69 Per unit Block Diagram for Rotating Rectifier Excitation System FD Vatut Vp 0 00013 Rockwell Automation Publication 1407 UM001H EN P November 2014 195 AppendixB CGCM Unit Math Models Notes 196 Rockwell Automation Publication 1407 UM001H EN P November 2014 ControlNet Application Objects Appendix C Additional ControlNet Network Information In addition to the standard adapter class ControlNet core objects the CGCM unit also supports these application specific objects Identity Object Assembly Object Data Types The ControlNet and Logix controller data types used by the CGCM unit assembly objects are sho
145. er 2014 79 Chapter4 CGCM Unit Configuration Excitation Tab The Excitation tab is used to configure the unit s settings related to operation and protection of the exciter a Module Properties Report CNBR 1407 CGCM 4 1 x Voltage Current Frequency Power VEL OEL Fault Relay General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking Load Share Synch Soft Start Excitation Select Initial Voltage 5 0 OG PMG Time 5 0 per Shunt Over Excitation Voltage PMG Phase Select 150 0 Setpoint Volts 1 Phase Delay 1 0 sec 3 Phase Loss Excitation Current Setpoint 05 Amps Delay 5 000000 sec Rotating Diode Fault Main Pole 4 Poles Exciter Pole 8 Poles Open Diode Level 5 0 Shorted Diode Level 30 0 Delay 15 0 sec Status Offline Cancel App Help e Soft Start Initial Voltage The generator voltage setpoint that is applied immediately after enabling the CGCM unit excitation output This parameter is stored in tag SoftStart_InitLevel in the Configuration table Its value is a percentage of the nominal generator rated voltage Take care to set this parameter higher than the generator residual voltage Soft Start Time The desired time to ramp up from the Soft Start Initial Voltage to the nominal generator output voltage This parameter is stored in tag SoftStartTime in the Configuration table and is expressed in seconds
146. er Factor mode inputs and outputs for the CGCM unit Inputs to the CGCM Unit The Power Factor mode has these inputs PF VAR Select This tag lets you select PF or VAR control PF_VAR_En When this tag is set to 1 the CGCM unit uses the PF_VAR Select tag to determine its control mode When this tag is set to 0 the CGCM unit uses the AVR_FCR_Select tag to determine its control mode PFSetpt This tag sets the desired power factor setpoint for operation in the PF control mode PF_Kg This tag lets you adjust coarse loop gain and overall gain of the power factor controller It also determines the characteristic of the dynamic response to a change in the power factor of the generator PF Ki This tag lets you adjust the integral gain of the power factor controller This tag determines the characteristic of the dynamic response to a change in the power factor setting PF_Traverse_Rate This parameter determines the time measured in seconds for the PF setpoint to move from 0 50 lagging to 0 50 leading or vice versa It determines how fast the regulator changes the power factor setpoint from the tracking value to the operating setpoint when the Regulator Operating mode changes to PF PF_VARAuxGain This tag lets you adjust the overall gain of the auxiliary input s control on the VAR PF operating modes The units for the var controller are percent of nominal per volt A setting of one results in the controlled parameter being chan
147. er Tag is automatically read by the host controller from the unit at the scheduled update rate whenever a connection between the two exists This occurs independently of the user program The Input data table can also be read by using unscheduled messaging Data Type The Input data table is automatically created by using module defined data type AB 1407_CGCM 1 0 Assembly Object Instance 2 Input Data Table Scheduled Read The Get Attributes Single service for instance 1 of the Assembly Object can access the following information Table 6 Get Attributes Single Service Code 0x0E Attribute ID Data Type Data 3 UINT See Scheduled Read Data Table Size 4 UINT 76 Configuration Checking No range checking is performed on the Input data table Table 7 Scheduled Read Data Table Byte Size in Type Bits Tag Name Description Units Range Bytes 0 4 DINT O27 Status_32_bit Connect Status 4 1 Bool 0 RevVARFIt Reverse KVAR Fault 0 Inactive 1 Active Bool 1 RevPwrFlt Reverse kW Fault Bool 2 OvrExcFl Over excitation Fault Bool 3 Ovr 1FI Over current Fault Bool 4 Undr V Fit Under voltage Fault Bool 5 Ovr V Flt Over voltage Fault Bool 6 UndrFreqFlt Under frequency Fault Bool 7 OvrFreqFlt Over frequency Fault 134 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGC
148. er excitation The time limit counter monitors the duration of an over excitation condition The reset counter counts backward from either the high OEL time setting or the sum of the high and medium OEL times depending on the value of the time limit counter If during an OEL cycle excitation current returns below the low current value the reset counter begins counting backwards from its present value If it reaches zero the time limit counter is reset to zero and a new OEL cycle can then occur If the reset counter does not reach zero before the excitation current rises above the low current value the time limit counter begins counting where it stopped when the excitation current last fell below the low current value If the time limit counter is greater than the programmed high OEL time the excitation current is limited to the medium current value This prevents repeated cycling of the exciter field at its highest possible current value When the excitation current exceeds the OEL limit the OEL alarm tag OEL Active 1 In FCR mode OEL limiting is not active although the tag is set This tag is in the Scheduled Read table The OEL function meets ANSI IEEE C50 13 Under excitation Limit Under excitation limiting UEL operates in all modes except FCR mode UEL senses the leading var input of the generator and limits any further decrease in excitation to prevent loss of synchronization and excessive end iron heating during parallel oper
149. erator bus in three phase metering In single phase metering these bits reflect the configuration value PhRotMatch This tag reports that the phase rotation between the two busses to be synchronized matches and is acceptable for synchronizing V_Match This tag reports that the voltage difference between the two busses is within the configured acceptable range FreqMatch This tag reports that the frequency difference between the two busses is within the configured acceptable range 230 Rockwell Automation Publication 1407 UM001H EN P November 2014 Detailed CGCM Unit Tag Descriptions Appendix E e PhMatch This tag reports that the phase difference between the two busses is within the configured acceptable range e V MatchErr This tag reports the percentage difference in voltage between the two busses to be synchronized e FreqMatchErr This tag reports the difference in frequency between the two busses to be synchronized e PhMatchErr This tag reports the phase difference between the two busses to be synchronized e CloseBusA Brkr When this tag is 1 it indicates that synchronization has reached a status where it is acceptable to close the breaker to Bus A e CloseBusB_Brkr When this tag is 1 it indicates that synchronization has reached a status where it is acceptable to close the breaker to Bus B e Raise V This tag indicates to the host Logix controller that the synchronizing bus has a lower voltage level tha
150. ernally scaled by the CGCM unit according to its transformer configuration settings Bus voltage sensing inputs are labeled V Bus A V Bus B V Bus C and V Bus N Generator Line Current The CGCM unit senses generator current through current transformers installed on the generator output leads Current measured through the line current inputs is used for metering purposes regulating generator vars regulating generator PF real power load sharing and for protection purposes and is required for operation in AVR Droop PF and VAR operating modes Line current inputs are galvanically isolated via CTs internal to the CGCM unit The CGCM unit accepts either 1 A or 5 A current inputs wired to the corresponding input Line current inputs are labeled I1 1 A I1 5 A I1 and so forth Cross current The CGCM unit senses reactive differential current through properly connected current transformers typically installed on the B phase output leads of each paralleled generator See Typical Cross current CT Locations and Polarity on page 34 for more information Line current inputs are galvanically isolated via CTs internal to the CGCM unit The CGCM unit accepts either 1 A or 5 A current inputs The cross current input terminals are labeled ID 5A ID 1A and ID Rockwell Automation Publication 1407 UM001H EN P November 2014 39 Chapter 3 40 CGCM Unit Operation Auxiliary Input This input is an analog voltage 10 10V
151. es not refer to this data e Setpoint Establishes the over voltage setpoint used by the CGCM unit This setpoint is stored in tag Ovr V Setpt in the configuration table and scaled in per cent rated generator volts e Delay Establishes the time the generator voltage must be above the over voltage setpoint before the CGCM unit annunciates an over voltage fault This setpoint is stored in tag Ovr_V_TimeDly in the configuration table and scaled in seconds Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 Under voltage e Setpoint Establishes the under voltage setpoint used by the CGCM unit This setpoint is stored in tag Undr V Setpt in the configuration table and scaled in per cent rated generator volts Delay Establishes the time the generator voltage must be below the under voltage setpoint before the CGCM unit annunciates an under voltage fault This setpoint is stored in tag Undr V TimeDly in the configuration table and scaled in seconds Compensation Settings Droop Percentage Establishes the voltage droop level at rated load when operating in Voltage Droop reactive current compensation mode This setting determines the change in voltage setpoint expressed in percent of rated voltage A setting of 5 for example results in the voltage setpoint being changed by 5 of rated voltage for a change in kVARs equal to the rated kVA The tag V_DroopSetpt in the Configuration tabl
152. eutral PhC_GenV This tag reports the Voltage from Generator Phase C to Neutral AvgLL_BusV This tag reports the Average Line to Line Voltage of the active phases of the bus PhAB BusV This tag reports the Line to Line Voltage between Bus Phases A and B PhBC_BusV This tag reports the Line to Line Voltage between Bus Phases B and C PhCA BusV This tag reports the Line to Line Voltage between Bus Phases C and A AvgLN_BusV This tag reports the Average Line to Neutral Voltage of the active phases of the bus PhA BusV This tag reports the Voltage from Bus Phase A to Neutral PhB BusV This tag reports the Voltage from Bus Phase B to Neutral PhC BusV This tag reports the Voltage from Bus Phase C to Neutral BusB_V Reference Bus voltage for the B reference in a dual breaker scenario Rockwell Automation Publication 1407 UM001H EN P November 2014 Detailed CGCM Unit Tag Descriptions Appendix E Exc_V This tag reports the Excitation Voltage Exc I This tag reports the Excitation Current e ExcRipple This tag reports the Ripple Current component of the Excitation Current e kW_Hrs This tag reports the cumulative kWHours produced by the Generator KVAR Hers This tag reports the cumulative kVARHours produced by the Generator e kVA_Hrs This tag reports the cumulative kVAHours produced by the Generator e GenFreq This tag reports the Generator frequency BusFreq This tag report
153. evision 3 x and later If an unscheduled write with length of 76 bytes is attempted toa CGCM unit with firmware revision 2 x the message returns an error due to the data size mismatch Rockwell Automation Publication 1407 UM001H EN P November 2014 127 Chapter6 CGCM Unit Software Interface Table 5 Summary of Data Tables CGCM Unit Data Table Summary This table summarizes what information the data tables provide g p e 5 188 5 2 N 3 o a 3 I 2 2 l e iq 25 a 2 8 br 2 2 5 5 a Z S lt je a E s z s Zo gt 2 2s 5 z E of a 2 Eo a iz a lt Fy S cc Input Scheduled N A R AB 1407 CGCM l 0 2 76 S N A 134 Read Output Scheduled 2 x W AB 1407_CGCM 0 0 1 56 S Y 38 Write 3 x 4 x AB 1407_CGCM 0 1 Unscheduled Read 2 x R AB 1407_CGCM Unscheduled Read 5 172 U N A 142 3 X 4 x AB 1407 CGCM Unscheduled Read3 Unscheduled Write 2 X W AB 1407_CGCM Unscheduled Write 6 64 U Y 144 3 X 4 x AB 1407_CGCM Unscheduled_Write3 76 Configuration 2 X R W AB 1407_CGCM C 0 4 344 S W N 147 37 0 AB 1407 CGCM C 1 U R 1 Series C units with ControlNet Daughter Card firmware revision 1 09 or later and Series D units have an additional instance that can be used to access this data The assembly instance is 7 and the size is 352 This instance eliminates the need for the user to deal with internal bytes used by RSLogix software
154. f interest These can be connected to the CGCM VT and CT input terminals in place of system VT and CT instruments primary current applied Wiring between the CTs and the CGCM unit must include a shorting terminal block in the CT secondary circuit Shorting the secondary with primary current present lets you remove other connections if needed An open CT secondary with primary current applied produces a hazardous voltage which can lead to personal injury death property damage or economic loss WARNING Never open a current transformer CT secondary circuit with Perform the static and dynamic redundancy tests described below Perform recommended start up procedures on each unit when commissioning redundant CGCM systems Remove control power from the other CGCM unit prior to start up procedures Initial Checkout Follow these steps to perform the initial checkout 1 Inspect physical installation of the CGCM unit and associated hardware 2 Inspect all related CGCM unit wiring interconnections 3 Verify that grounding wiring is correctly installed and that CT wiring has been correctly installed by using shorting terminal blocks or test switches you provided 4 Verify that all safety related measures have been properly taken such as locking and tagging out power interconnections and prime mover capability Apply Power to the CGCM Unit 24V DC Follow these steps to apply power to the CGCM unit 1 Apply control power 2
155. from the CGCM Unit e Owr V Flt This tag is used to communicate the occurrence of an Over voltage Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Inputs to the CGCM Unit e Undr_V_FltOutEn When this tag is a 1 in the configuration and an Under voltage Fault occurs as defined by the Undr_V_Setpt tag the Fault Relay is energized When this tag is a 0 in the configuration an Under voltage Condition has no effect on the Fault Relay e Undr_V_Setpt This tag configures the generator under voltage setpoint that the CGCM unit uses to recognize an under voltage condition When the condition occurs the CGCM unit starts timing toward a trip e Undr_V_TimeDly This setting establishes the time to trip the unit once the generator Under voltage Setpoint has been exceeded Engineldle Setting this tag to 1 enables Soft Start mode and disables the under frequency under voltage and Loss of PMG protections until the generator is at rated speed Generator Under voltage Outputs from the CGCM Unit e Undr V Flt This tag is used to communicate the occurrence of an Under voltage Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Loss of Sensing Inputs to the CGCM Uni
156. g Ovr I Flt 1 in the Scheduled Read table Synchronizing The CGCM unit monitors the generator and bus voltage sensing inputs to provide synchronization between the generator and either of two buses The CGCM unit provides voltage phase and frequency error parameters and a breaker close permissive signal to its host Logix controller This lets the controller control the prime mover achieve phase synchronization and voltage matching The CGCM unit can also provide synchronization between two busses by measuring appropriate synchronization parameters For synchronizing between two busses substitute the term second bus for generator in the discussions that follow When synchronizing a system between systems with differing metering configurations the synchronization configuration must account for any phase shift or voltage differences between the two systems For example when synchronizing a three wire delta generator to four wire wye bus system the synchronization configuration must take into account the 30 phase shift between line to line and line to neutral voltage Rockwell Automation Publication 1407 UM001H EN P November 2014 59 Chapter 3 60 CGCM Unit Operation Synchronizing Connection Schemes The CGCM unit provides information that its host Logix controller uses to synchronize the generator output voltage frequency and phase to a reference power system or bus 3 phase dual bus and single phase connection sch
157. ge decrease Kd The tag AVR FCR Kdiin the Unscheduled Write table stores this parameter Time Constant Td The filtering time constant Td is used to remove the noise effect on the numerical differentiation The tag AVR_FCR_Td in the Unscheduled Write table stores this parameter expressed in seconds e FCR Overall Gain Kg Sets the overall gain of the voltage regulator in FCR mode It determines the characteristic of the dynamic response to a change in the CGCM unit output current The tag FCR_Kg in the Unscheduled Write table stores this parameter e AVR Overall Gain Kg Sets the overall gain of the voltage regulator in AVR mode It determines the characteristic of the dynamic response to a change in the voltage of the generator The tag AVR_Kg in the Unscheduled Write table stores this parameter Voltage Matching Gain This parameter is not used Set to zero The tag V_Match_Gain in the Unscheduled Write table stores this parameter Rockwell Automation Publication 1407 UM001H EN P November 2014 89 Chapter 4 90 CGCM Unit Configuration Power Factor Control The Power Factor Control gains determine the response of the power factor control loop for the voltage regulation function when in PF mode These settings can be adjusted during system startup Please refer to Chapter 5 for more information on tuning the power factor control gains Integral Gain Ki Sets the integral gain Generally if the time to reach ste
158. ge 66 for the sign convention of power and current values Metered Parameters The CGCM unit provides the following metered parameters The collection of metering data is dependent on the metering wiring mode selected for example single phase open delta four wire wye and three wire wye Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 Table 3 Metered Parameter Accuracy Metered Parameter Metering Wiring Mode Single phase Delta Three wire Wye Four wire Wye Dual bus Gen Voltages 3 L L CA AB BG CA AB BC CA AB BC CA Gen Voltage avg L L Yes CA Yes Yes Yes Gen Voltages 3 L N N A N A N A A B C Gen Voltage avg L N N A N A N A Yes Gen Currents 3 A B C A B C A B C A B C Gen Current avg Yes Yes Yes Yes Gen Kilowatts 3 N A N A N A A B C Gen Kilowatts total Yes Yes Yes Yes Gen kVA 3 N A A N A A B C Gen kVA total Yes Yes Yes Yes Gen kVAR 3 N A A N A A B C Gen KVAR total Yes Yes Yes Yes Gen Power Factor 3 N A N A N A A B C Gen Power Factor avg Yes Yes Yes Yes Gen Frequency Yes Yes Yes Yes Excitation Current Yes Yes Yes Yes Gen Kilowatt Hours Yes Yes Yes Yes Gen kVAR Hours Yes Yes Yes Yes Gen kVA Hours Yes Yes Yes Yes Diode Ripple Level Yes Yes Yes Yes Load Share Error Yes Yes Yes Yes Voltage Match Error 1 1 1 1 1 Sync Pha
159. ge Frequency VA max pm Single phase PMG A and PMG C Min 56 Vrms Min 50 Hz 3070 Max 300 Vrms Max 342 Hz PMG 3 phase Floating wye Min 56Vrms L L Min 50 Hz 3070 Max 300 Vrms L L Max 342 Hz Sp Single phase PMG A and PMG C Min 56Vrms Min 50 Hz 3070 Max 300 Vrms Max 342 Hz SE 3 phase Floating wye Min 56Vrms L L Min 50 Hz 3070 Max 300 Vrms L L Max 342 Hz SE 3 phase Grounded wye Min 56Vrms L L Min 50 Hz 3070 grounded neutral Max 300 Vrms L L Max 342 Hz SE 3 phase Floating delta Min 56Vrms L L Min 50 Hz 3070 Max 300 Vrms L L Max 342 Hz SE 3 phase Open delta floating Min 56Vrms L L Min 50 Hz 3070 Max 300 Vrms L L Max 342 Hz 1 PMG Permanent Magnet Generator 2 SE Separately Excited Rockwell Automation Publication 1407 UM001H EN P November 2014 201 Appendix D Specifications Generator Voltage Sensing Phase Wiring Grounded Voltage Range for Frequency Range Single V Gen A and No Specified for Specified Accuracy Accuracy Min 57 Vrms Min 20 Hz Max 150 Vrms Max 90 Hz Min 99 Vrms L L Min 20 Hz Max 208 Vrms L L Max 90 Hz Configurations Connection Available phase VGenC Three Floating wye No phase Three Grounded wye Yes phase grounded neutral Min 99 Vrms L L Min 20 Hz Max 208 Vrms L L Max 90 Hz Three Open delta grounded Yes phase B phase Min 99 Vrms L L Min 20 Hz Max 208 Vrms L L Max 90 Hz IMPORTANT Volt
160. ge voltages reported in the CGCM unit s controller tags are as expected for the selected configuration Verify and Adjust AVR Mode Operation constant voltage Follow these steps to verify and adjust the AVR mode operation A QD Adjust the AVR setpoint to the generator rated voltage Select Constant Voltage mode by disabling reactive compensation droop Select the AVR mode of operation Monitor the generator exciter field current and generator voltage Verify that the metered generator voltage is near the rated output voltage setpoint entered previously Adjust the AVR setpoint and verify the metered voltage responds as desired Adjust gains as required to achieve the desired result Disable excitation and allow the generator voltage to collapse With the AVR mode of operation still selected enable excitation and verify the configured soft start is performed and the generator voltage increases to the AVR setpoint Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Startup Chapter 5 Verify CGCM Unit Redundancy Operation when applicable Follow these steps to verify the CGCM unit s redundancy operation 1 Determine which CGCM unit is the primary of the redundant pair by monitoring the Sparel tag in the Input table 2 Disable excitation on the primary CGCM unit by removing the hardware excitation enable input or clearing the software excitation enable tag or removi
161. ged by one percent of the nominal value for each volt applied to the auxiliary input For PF control the units are 0 01PF per volt A setting of 5 results in the regulated PF being changed by 0 05 for each volt applied to the auxiliary input Outputs from the CGCM Unit The Power Factor mode has these outputs PF VAR Selection This tag reports the selection of PF or VAR control see PF VAR Select PF VAR Control This tag reports your selection of PF VAR or AVR FCR mode Rockwell Automation Publication 1407 UM001H EN P November 2014 217 Appendix E Detailed CGCM Unit Tag Descriptions VAR Mode 218 This section describes the VAR mode inputs and outputs for the CGCM unit Inputs to the CGCM Unit The VAR mode has these inputs PF VAR Select This tag lets you select PF or VAR control PF VAR En When this tag is set to 1 the CGCM unit uses the PF VAR Select tag to determine its control mode When this tag is set to 0 the CGCM unit uses the AVR FCR Select tag to determine its control mode VARSetpt This tag sets the desired KVAR setpoint for operation in the VAR control mode VAR Kg This tag lets you adjust coarse loop gain and overall gain of the power factor controller It also determines the characteristic of the dynamic response to a change in the power factor of the generator VAR Ki This tag lets you adjust the integral gain of the VAR controller It also determines the characteristic of the dynami
162. generator and bus voltages For example if the generator nominal voltage is 4160V and the nominal Bus A voltage is 12 480V each measured line to line a voltage multiplier value of 0 333 permits voltage matching during synchronization Configuration table tag BusA_V_Scaler stores this parameter e Phase Establishes an offset angle added to the measured Bus A phase angle It can be used to compensate for phase shift across transformers or between delta and wye connected systems As an example consider the system shown in Voltage and Current Connection for Four wire Wye Bus and Two or three Transformer Delta Generator System on page 24 When a generator with three wire delta metering is synchronized to a bus with four wire wye metering set the phase offset to 30 to compensate for the 30 lag between the delta and wye systems Configuration table tag BusA PhOffset stores this parameter expressed in degrees Bus B Offsets e Voltage multiplier Establishes a factor by which the Bus B voltage is scaled during synchronization It can be used to compensate for transformer ratio differences between the generator and bus voltages Configuration table tag BusB_V_Scaler stores this parameter e Phase Establishes an offset angle added to the measured Bus B phase angle It can be used to compensate for phase shift across transformers or between delta and wye connected systems Configuration table tag BusB_PhOffset stores this
163. generator manufacturer s data for the proper setting information Refer to Chapter 3 for more information on the operation of the UEL function a Module Properties Report CNBR 1407 CGCM 4 1 Ea General al Connection Module Info Generator J Transformers _ Excitation Volts Hz Gain Tracking Load Share Synch Voltage IP Current I Frequency Power UEL OEL Fault Relay I Under Excitation Limiting Enable Real Power W Under Excitation Limiting Curve 0 40000 100000 160000 220000 280000 25004 4 4 4 4 4 4 4 4 4 4 4 4 4 4 W Point 1 25000 0 Ww W Point 2 50000 0 w 525004 W Point 3 100000 0 w a WPointit4 200000 0 w T 41025004 W Point 5 300000 0 Ww 3 1525004 VAR Point amp 1 275000 0 VAR Pa VAR Point 2 250000 0 VAR S 5025004 VAR Paint 3 200000 0 VAR ce VAR Point 4 100000 0 VAR 2525004 VAR Point amp 5 20000 0 VAR 302500 e amp Gr Status Offline l OK Cancel Apr Help e Under excitation Limiting Enable Select this check box to enable over excitation limiting Tag UEL_En in the configuration table stores this parameter In addition to selecting the check box which sets the UEL_En tag in the configuration table the UEL_En tag in the Output Scheduled Write Data table must also be set to enable this function In Series B deices with firmware revision 3 3 or earlier the UEL limiter operates if either the enable box is checked or the UEL_En
164. ges to AVR Power Factor Traverse Rate Sets tag PF Traverse Rate in the Configuration table This parameter determines the time measured in seconds for the PF setpoint to move from 0 50 lagging to 0 50 leading or vice versa It determines how fast the regulator changes the power factor setpoint from the tracking value to the operating setpoint when the Regulator Operating mode changes to PF VAR Control Traverse Rate Sets tag VAR Traverse Rate in the Configuration table This parameter determines the time measured in seconds for the setpoint to move from zero to the rated generator KVA It determines how fast the regulator changes the VAR setpoint from the tracking value to the operating setpoint when the Regulator Operating mode changes to VAR e Manual Control FCR Traverse Rate Sets tag FOR Traverse Rate in the Configuration table This parameter determines the time measured in seconds for the setpoint to move from zero to the rated exciter current It determines how fast the regulator changes the field current setpoint from the tracking value to the operating setpoint when the Regulator Operating mode changes to FCR Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Configuration Chapter 4 The following diagram shows the function of internal tracking and traverse rates on a switch from VAR to PF operating modes Figure 40 Internal Tracking and Traverse Rates Generator Voltage Power Factor
165. gix 5000 software and programmed the host Logix controller configured the ControlNet network performed the initial configuration of the CGCM unit This suggested procedure is a basic guide that can be altered to suit the needs of your particular installation For additional information on how to perform specific steps refer to Chapter 3 CGCM Unit Operation and Chapter 4 CGCM Unit Configuration If errors are encountered during startup refer to Chapter 7 Troubleshooting WARNING Only qualified personnel following accepted safety A procedures can install wire and service the CGCM unit and its associated components Before beginning any work disconnect all sources of power and verify that they are de energized and locked out Failure to follow these instructions can result in personal injury or death property damage or economic loss primary current applied Wiring between the CTs and the CGCM unit must WARNING Never open a current transformer CT secondary circuit with include a shorting terminal block in the CT secondary circuit Shorting the secondary with primary current present lets you remove other connections if needed An open CT secondary with primary current applied produces a hazardous voltage which can lead to personal injury death property damage or economic loss Rockwell Automation Publication 1407 UM001H EN P November 2014 107 Chapter5 CGCM Unit Startup ATTENTION Electrostatic discharge
166. hibit Levels Attribute 1407 CGCM Field current lt 1 5ADC Generator frequency lt 45Hz Generator frequency gt 70 Hz Phase Rotation Check Pickup 67 of rated voltage 2 of rated voltage Time delay 1s 0 1 s Soft Start Function Attribute 1407 CGCM Soft start initial voltage 0 90 of rated voltage in 1 increments Soft start time 1 7200 s in 1 s increments Voltage Matching Attribute 1407 CGCM Accuracy Generator rms voltage is matched with the rms bus voltage to within 0 5 of the generator voltage Over excitation Limiting Online Attribute High Limiting Medium Limiting Low Limiting Pickup range 0 30 0 A DC 0 20 0 A DC 0 15 A DC Pickup increment 0 1A DC 0 1A DC 0 1A DC Time range 0 60 s 0 1205 Continuous Time increment 1s 1s Response time lt 3 cycles 208 Rockwell Automation Publication 1407 UM001H EN P November 2014 Specifications Appendix D Over excitation Limiting Offline Pickup 0 15A DC 0 1 A DC Time delay 0 10s 1s Under excitation Limiting Attribute 1407 CGCM Real power 0 100 kW for each of 5 points Reactive power 0 100 kvar for each of 5 points Manual Excitation Control Attribute 1407 CGCM Range 0 15 0 ADC Increment 0 1 ADC Metering Attribute Range Accuracy Generator voltage 57 208V AC 0 2 50 60 Hz Generator current 0 5AAC 0 2 50 60 Hz Generator frequency 10 90 Hz
167. hoot as non redundant CGCM unit Rockwell Automation Publication 1407 UM001H EN P November 2014 Correct or replace as needed 165 Chapter7 Troubleshooting Table 35 Protection Symptom Loss of excitation current 40 Protection Most Likely Cause Wiring error Diagnostic Action Check excitation output wiring Corrective Action Correct wiring as required Gains mis adjusted Check AVR gains Calculate adjust gains as required Over excitation voltage 59F Wiring error Check excitation output wiring Correct wiring as required Gains mis adjusted Check AVR gains Calculate adjust gains as required OEL limit exceeded Check OEL operation Correct as required Generator over voltage 59 Rapid loss of large load Gains mis adjusted Check AVR gains Calculate adjust gains as required Generator under voltage 27 Over load Wiring error Check VT wiring See Voltage Correct wiring as required metering trouble shooting Loss of sensing 60FL Fuse open Check VT fuses Replace as required Wiring error Check for open connections and Correct wiring as required phase rotation reversal Loss of permanent magnet generator PMG Excitation power 27 Supply circuit breaker trip fuse open Check PMG supply Measure with voltmeter at CGCM unit PMG input erminals Correct replace PMG input protection as required Wiring error Check PMG supply Measure with Corre
168. iate synchronization Rockwell Automation Publication 1407 UM001H EN P November 2014 119 Chapter 5 120 CGCM Unit Startup 5 Confirm that the CGCM unit reports appropriate error signals and issues a close command when appropriate Verify Applicable Automatic Operating Modes The CGCM unit has these automatic operating modes Droop reactive current compensation Operation Cross Current reactive differential compensation Operation VAR Control e PF Control e Real Power Load Sharing Operation Droop reactive current compensation Operation Perform this test with the generator operating in parallel with a large power source that is maintaining constant voltage You could also use one or more additional generators Follow these steps to test Droop operation 1 Adjust the prime mover to maintain constant real power 2 Adjust the voltage setpoint with the CGCM unit in Voltage Droop mode 3 Monitor the reactive power and verify that the measured reactive power changes by the expected amount EXAMPLE If the droop setpoint is 5 and the voltage setpoint is changed by 1 the expected change in reactive power is 20 of rated KVA Cross Current reactive differential compensation Operation Perform this test with the generator operating in parallel with a large power source that is maintaining constant voltage You could also use one or more additional generators Follow these steps to test the cross current operat
169. iled CGCM Unit Tag Descriptions Appendix E HardwareExcEned This tag reports the state of the Excitation Input EX D EX D terminals on Terminal Block TB7 Field excitation is disabled when this bit is in a 0 state SoftwareExcEned This tag reports the state of the SoftwareExcEn tag ExcOut This tag reports the state the CGCM unit is commanding the excitation output to take SetptTraverseActive This tag indicates when the CGCM unit is traversing between an internal tracking setpoint establish by the internal tracking function and the final setpoint provided by the schedule write data Traversing occurs when switching from the active Regulation mode and any of the other regulating modes AVR Mode This section describes the AVR mode inputs and outputs for the CGCM unit AVR Mode Inputs to the CGCM Unit The AVR mode contains these inputs AVR FCR Select This tag lets you select AVR or FCR control AVRSetpt This tag sets the desired voltage setpoint for operation in the AVR control mode AVR_FCR_Kp This tag sets the Proportional Gain parameter for AVR and FCR control modes AVR FCR Ki This tag sets the Integral Gain parameter for AVR and FCR control modes AVR FCR Kd This tag sets the Derivative Gain parameter for AVR and FCR control modes AVR_FCR_Td This tag sets the filtering Time Constant for AVR and FCR control modes AVR_Kg This tag lets you adjust coarse loop gain and overall gain of
170. ion 1 Enable the OEL function 2 Determine the field current required to reach 105 of the rated generator voltage 3 Set the offline OEL high and low setpoints for a value equal to the field current determined above 4 Set the voltage setpoint to rated generator voltage 5 Enable excitation 6 Set the voltage setpoint to 110 of the rated output 7 Verify that the generator maximum voltage remains at approximately 105 and that the OEL Active tag 1 8 Observe the response of the excitation current reported by the CGCM unit 9 Adjust the OEL gains as required to obtain the desired stable response 10 Return the AVR setpoint to the rated output level 11 Return the OEL settings to the values determined for the application Diode Monitor Perform this test with the generator operating in any mode Follow these steps to test the Diode Monitor operation 1 2 Input the number of main poles and exciter poles Determine the normal percent ripple by observing the ExcRipple tag value Find the highest percent ripple while operating the generator and prime mover through the normal operating range Set the Open Diode Level to a value that is three times the highest normal percent ripple found above The multiplier can be varied from 2 5 to adjust the trip margin Reducing the multiplier could result in nuisance EDM open diode indications 124 Rockwell Automation Publication 1407 UM001H EN P November 2014 Docu
171. ion 1 Safely disconnect the cross current loop reactive differential inter connection with parallel machines The cross current CT for the generator under test must remain connected to its CGCM unit 2 Adjust the prime mover to produce a constant power of approximately 25 of rated output with the voltage control in AVR Droop mode Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Startup Chapter 5 3 Change the mode of operation to cross current compensation Adjust the voltage setpoint Monitor the reactive power and verify that the measured reactive power changes by the expected amount For example if the cross current compensation gain is 5 and the voltage setpoint is changed by 1 the expected change in reactive power is 20 of rated kVA Repeat the same test on each machine Reconnect the cross current loop Connect two or more machines in parallel not connected to an infinite source and apply a load Verify that the generator voltage does not decrease and the reactive power is shared among the machines VAR Control Perform this test with the generator operating in parallel with a large power source that is maintaining constant voltage Follow these steps to test the VAR control operation 1 2 Place the voltage control in Droop mode Adjust the prime mover to produce a constant power of approximately 25 of rated output Verify that the VAR setpoint is adjusted t
172. ion output negative EXC Excitation output positive Rockwell Automation Publication 1407 UM001H EN P November 2014 15 Chapter2 Installation Table 1 Terminal Block Label Description Terminal Block Wire Gauge Label Description Range TB3 26 2 1 mm Di 1 A 1 A cross current compensation CT input 10 12 AWG D 5 A 5 A cross current compensation CT input D Cross current compensation CT common input 3 1 A 1 A phase C CT inpu 3 5 A 5 A phase C CT inpu 3 Phase C CT common input 2 1 A 1 A phase B CT inpu 2 5 A 5 A phase B CT inpu 2 Phase B CT common input 1 1 A 1 A phase A CT inpu 1 5 A 1 A phase A CT inpu 1 Phase A CT common input TB4 16 1 0 mm BAT 24V DC control power input 14 18 AWG BAT 24V DC control power return FLT Open collector fault output RD RLY Open collector output for redundancy relay CH GND Chassis ground TB i V Gen Phase generator voltage input V Gen B Phase B generator voltage input V Gen C Phase C generator voltage input V Gen N Neutral generator voltage input TB6 V Bus A Phase A bus voltage input V Bus B Phase B bus voltage input V Bus C Phase C bus voltage input V Bus N Neutral bus voltage input TB7 1 6 1 0 mm VREF Remote setpoint adjust input 14 18 AWG VREF Remote setpoint adjust input return SHLD3 Shield 3 landing
173. it Software Interface Table 14 Set Attributes Single service code 0x10 Name Attribute ID Data Type Value See Unscheduled Write Data Table Data 3 UINT Assembly Instance 6 Configuration Checking When an unscheduled write is received the CGCM unit verifies that individual parameters are within the range indicated in the table below for example perform range checking If an out of range parameter is detected the CGCM unit ignores all data in the unscheduled write in the message instruction The CGCM unit does not perform application checking is a value suitable for the particular application or dependency checking is a value reasonable based on other values entered Data Table Although the Unscheduled Write tag is contained in the Configuration tag in the Logix controller tags the Unscheduled Write must be read back from the CGCM unit independently Table 15 Unscheduled Write Data Table Assembly Instance 6 Byte Size in Type Tag Name Description Units Range Error Bytes Code 0 4 Real LineDropComp Line Drop Compensation 0 10 1 4 4 Real AVR FCR Kp Automatic Voltage Regulator Field Current 0 1000 2 Regulator Proportional Gain 8 4 Real AVR FCR Ki Automatic Voltage Regulator Field Current 0 1000 3 Regulator Integral Gain 12 4 Real AVR FCR Kd Automatic Voltage Regulator Field Current 0 1000 4 Regulator De
174. ith other power sources such as a utility grid LossExc_I_TimeDly This tag configures the amount of time the CGCM unit s excitation is below the Loss of Excitation Current Setpoint before the CGCM unit trips the generator off line by opening the generator breaker Rockwell Automation Publication 1407 UMO001H EN P November 2014 Detailed CGCM Unit Tag Descriptions Appendix E Loss of Excitation Outputs from the CGCM Unit e LossExcFlt This tag is used to communicate the occurrence of a Loss of Excitation Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Shorted Excitation Output from the CGCM Unit e Spare2 Indicates when the excitation output short circuit protection is active When this tag is a 1 it indicates that a shorted output exists and the excitation current output has been clamped to a very low level The tag is reset by either setting the tag SoftwareExcEN 0 or by cycling the control power to the CGCM unit Over excitation Voltage Inputs to the CGCM Unit e OvrExcFltOutEn When this tag is a 1 in the configuration and an Over excitation Fault occurs as defined by the OvrExcV_Setpt tag the Fault Relay is energized When this tag is a 0 in the configuration an Over excitation Condition has no effect on the Fault Relay e OvrExcV_Setpt This tag configures the over excita
175. kVA The tag CrossCurrentGain in the Configuration table stores this parameter Related Parameters e GenRated_V e GenRated_I e GenRatedExcl Rockwell Automation Publication 1407 UM001H EN P November 2014 91 Chapter4 CGCM Unit Configuration Tracking Tab The Tracking tab is used to configure the unit s internal and redundant tracking parameters Enter the internal tracking redundant tracking and traverse rates in the appropriate fields of the Tracking tab a Module Properties Report CNBR 1407 CGCM 4 1 x Voltage Current Frequency Power UEL OEL i Fault Relay General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking Load Share Synch Internal Tracking Traverse Rates v Enable Internal Tracking AVR Control 20 0 sec Rated V Rate 50 sec FS Power Factor 20 0 sec 1 0PF Delay 0 5 sec VAR Control 20 0 sec Rated kVA Manual Control FOR 20 0 sec Rated Field I Redundant Tracking Rate 20 sec FS Delay 01 sec Status Offline OK Cancel App Help 92 Internal Tracking e Enable internal tracking This checkbox sets the Boolean tag Internal Tracking En in the Configuration data table When the value of this tag is 1 internal tracking between voltage regulating modes is enabled and the Traverse Rates are enabled If the tag value is 0 both the Traverse Rates and tracking between regulation modes is disable Internal Tracking Rate This set
176. king information and remains in Secondary mode The primary CGCM unit indicates its status by setting the Sparel tag in the software interface to the host controller If the primary CGCM unit fails or if its excitation is disabled it stops sending tracking data on the redundancy communication channel When the secondary senses a loss of tracking data it automatically switches to Primary mode and takes over excitation control It remains primary until the host controller disables its excitation Rockwell Automation Publication 1407 UM001H EN P November 2014 67 Chapter 3 CGCM Unit Operation Once the primary and secondary CGCM unit roles have been established by the host controller they remain in their respective modes indefinitely You can force a transfer by disabling excitation on the primary unit This causes the secondary unit to sense a loss of tracking information switch to Primary mode and take over excitation control Following a transfer if the original failed primary CGCM unit is repaired and returned to service it detects tracking information from the primary unit and remain in Secondary mode In this state it is capable of taking over if the primary unit fails In a typical redundant CGCM unit application the host Logix controller determines the generator s offline or online status by monitoring the status of the generator breaker When operating offline the CGCM unit normally regulates generator voltage in AVR mode
177. l operation the ControlLogix controller and the CGCM unit share operating data through scheduled and unscheduled ControlNet network messaging The overall functions and detailed content of the CGCM unit data tables are described in the next section CGCM Unit Data Tables The tables in this section show the content and organization of the CGCM Unit data tables Terms These terms are used in the following tables e Spare Unused now can be available for future use If read spares are zero value If written spare data is ignored by the CGCM unit Reserved Used internally by CGCM unit If read reserve data can be any value If written reserved data is ignored by the CGCM unit Generator Generator output point e Bus Indicates the synchronizing reference point Bus A Indicates either a three phase reference bus or the first single phase reference bus e Bus B Ifused the second single phase reference bus 132 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Software Interface Chapter 6 Abbreviations The standard abbreviations shown below are used in the data table names for the assembly object table data names Abbreviation Definition Abbreviation Definition Ack Acknowledge Lo Low Aux Auxiliary LS Load Share Avg Average Max Maximum AVR Automatic Voltage Med Medium Regulat
178. lay 2 0 eae a thal a 12 00 Medium Level Setpoint 15 0 Amps TT E 10 00 Medium Level Time Delay TT cae amp 8 00 Low Level Setpoint Amps 5 G 6 00 Offline 4 00 High Level Setpoint 20 0 Amps 2 00 High Level Time Delay 20 sec 0 00 Low Level Setpoint 10 0 Amps 1 5 2 2 5 3 35 4 Time sec Graph Online Graph f Status Offline OK Cancel Appl e Over excitation Limiting Enable Select this check box to enable over excitation limiting Tag OEL En in the configuration table stores this parameter In addition to selecting the check box which sets the OEL En tag in the configuration table the OEL En tag in the Output Scheduled Write Data table must also be set to enable this function In Series B deices with firmware revision 3 3 or earlier the OEL limiter operates if either box is checked or the OEL En tag in the Output Scheduled Write Data table is set e The tags listed below determine the points shown in the OEL configuration diagrams below These tags are in the configuration table and are set by the like named fields in the OEL tab They are expressed as amperes and seconds respectively Rockwell Automation Publication 1407 UMO001H EN P November 2014 Figure 37 Online OEL Configuration High Current Time FIELD CURRENT SORES RRIIRRIIRRIIRIIIRIIKIIIIIIIS SSS SRG 0 10 seconds Ne KKK xy IIIZ RAK KKK Sr SRR CGCM Unit Configuration Medium Me
179. led EX D and EX D Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 Analog Outputs The unit has two types of analog outputs excitation output and real power load sharing Excitation Output The CGCM unit Pulse Width Modulated PWM power stage provides DC generator exciter field current The excitation power stage is designed to accommodate up to 125V DC nominal field voltages Refer to Excitation Control Modes on page 44 for a description of operation Care must be taken that the field resistance does not allow more than 15 A DC to flow continuously at rated field voltage Minimum resistance for common voltages is given in Appendix D The CGCM unit excitation output is equipped with a high speed circuit for detecting a shorted output The excitation output is clamped at a very low level when a low impedance connection is detected The CGCM unit indicates that the clamp is active by setting Spare2 bit in the Scheduled Read Data Table The Spare2 bit indication is reset by either setting the tag SoftwareExcEN 0 or by cycling the control power to the CGCM unit Note that a loss of ControlNet network communication with the host Logix controller causes the CGCM unit to automatically shutdown generator excitation The excitation output terminals are labeled EXC and EXC Real power Load Sharing Real power load sharing terminals are provided to allow two or more CGCM unit
180. librate the CGCM unit during factory testing Com 1 Redundancy Port The redundancy port lets one CGCM unit communicate with its partner CGCM unit in a redundant system letting the partner unit auto track the primary unit s control modes ControlNet Network Port The version 1 5 ControlNet network port is used to interface with a Logix family programmable logic controller Through this port RSLogix 5000 software facilitates setting CGCM unit configuration parameters Control metering and protection settings are communicated to the CGCM unit by using this port The CGCM unit firmware is flash programmable through this port Rockwell Automation Publication 1407 UMO001H EN P November 2014 Operational Functions CGCM Unit Operation Chapter 3 Software Inputs and Outputs Your Logix family host programmable controller must include the hardware and communication interfaces with the generator prime mover power system and balance of plant that are not specifically included in the CGCM unit module The software interface between the CGCM unit and its host controller is made via the ControlNet software interface The specific interface consists of several assembly instances or data tables The Input Scheduled Read table provides time critical status and fault parameters and control commands from the CGCM unit to the host Logix controller The Output Scheduled Write table provides time critical enable commands selection com
181. lication 1407 UM001H EN P November 2014 61 Chapter 3 62 CGCM Unit Operation e Check Synchronization The host controller sets the CheckSyncEn tag to enable Check Synchronization mode This mode is the same as the Automatic Synchronization mode except the CGCM unit does not set a close breaker tag This mode is useful for testing the system e Initiate Synchronization The host Logix controller sets the InitiateSync tag to begin the synchronization process This tag must remain set during the entire process If the initiate synchronization tag is reset the CGCM unit terminates the synchronization process Similarly a write of the Unscheduled Write table terminates an active synchronization process The Initiate Synchronization tag enables the operation of the selected Synchronizing mode The host controller must select one and only one of the three modes described above before or at the same time as the Initiate Synchronization tag If none are enabled the CGCM unit sets the undefined Synchronization mode error flag If more than one of these inputs is enabled the CGCM unit sets the conflict error flag In either case synchronization fails and the CGCM unit sets the synchronization failure flag Synchronizing Error Calculation When Synchronization is active the CGCM unit computes synchronizing errors as follows Voltage Match Error 100 x Bus Voltage Generator Voltage Bus Voltage Frequency Match Error Bus Frequency
182. ll Automation Publication 1407 UM001H EN P November 2014 249 Index Notes 250 Rockwell Automation Publication 1407 UM001H EN P November 2014 Rockwell Automation Support Rockwell Automation provides technical information on the Web to assist you in using its products At http www rockwellautomation com support you can find technical and application notes sample code and links to software service packs You can also visit our Support Center at https rockwellautomation custhelp com for software updates support chats and forums technical information FAQs and to sign up for product notification updates In addition we offer multiple support programs for installation configuration and troubleshooting For more information contact your local distributor or Rockwell Automation representative or visit http www rockwellautomation com services online phone Installation Assistance If you experience a problem within the first 24 hours of installation review the information that is contained in this manual You can contact Customer Support for initial help in getting your product up and running United States or Canada 1 440 646 3434 Outside United States or Canada Use the Worldwide Locator at http www rockwellautomation com rockwellautomation support overview page or contact your local Rockwell Automation representative New Product Satisfaction Return Rockwell Automation tests all of its products t
183. ltage applied to the CGCM unit If the generator voltage drops indicating a close in fault to the generator the generator voltage decays and the available fault current can be less This parameter shifts the characteristic curve in such a manner as to compensate for the reduction of available fault current Generator Over current Outputs to the CGCM Unit Ovr_I_Fit This tag is used to communicate the occurrence of an Over current Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Synchroni zing This section describes the synchronizing inputs and outputs for the CGCM unit Synchronizing Inputs to the CGCM Unit AutoSyncEn This tag is used to configure the CGCM unit to perform Auto Synchronization This is one of three synchronization modes each selected by their respective tag Only one can be active 1 or the SyncModeConflict tag is activated and the synchronization fails indicated by SyncFailure tag 228 Rockwell Automation Publication 1407 UM001H EN P November 2014 Detailed CGCM Unit Tag Descriptions Appendix E e CheckSyncEn This tag is used to configure the CGCM unit to perform Check Synchronization This is one of three synchronization modes each selected by their respective tag Only one can be active 1 or the SyncModeConflict tag is activated and the synchronization fails indica
184. lts Hz Gain Tracking Load Share j Synch Voltage Current Frequency Power UEL OEL Fault Relay Reverse kW Setpoint 5 0 of Rated VA FaultDelay 5 0 sec Reverse KVAR Setpoint 10 0 of Rated VA Fault Delay 20 0 sec e Reverse kW Setpoint Establishes the generator reverse kW setpoint in percent of rated VA The tag Rev_kW_Setpt stores this value in the configuration table e Reverse kW Fault Delay Establishes the amount of time in seconds that the reverse KW must be above the reverse kW setpoint before the CGCM annunciates the fault This parameter is stored in tag Rev_kW_TimeDly in the configuration table e Reverse KVAR Setpoint Establishes the generator reverse kVar setpoint in percent of rated VA The tag Rev_kVAR_Setpt stores this value in the configuration table e Reverse KVAR Fault Delay establishes the amount of time in seconds that the reverse KVAR must be above the reverse KVAR setpoint before the CGCM unit annunciates the fault This parameter is stored in tag Rev_kVAR_TimeDly in the configuration table Related Parameters e GenRated V e GenRated I 104 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Fault Relay Tab CGCM Unit Configuration Chapter 4 The Fault Relay tab is used to configure the unit s parameters related to the fault relay output Checking the box enables the fault output for that particular fault The fault output relay operates when a selected fa
185. m a slope of one corresponds to 2V per Hz The generator output voltage is maintained at the configured level for any frequency at or above the configured knee frequency up to 90 Hz Excitation is inhibited when the frequency is at or below the 10 Hz cutoff frequency The Under frequency Slope and Knee Voltages graph shows a typical Volts Hz characteristic as displayed in the RSLogix 5000 software CGCM unit configuration screen Volts Hertz limiting is automatically enabled in AVR mode and limits the voltage increase in Soft Start mode Figure 31 Under frequency Slope and Knee Voltages Underfrequency Slope 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 90 Voltage Frequency Hz Rockwell Automation Publication 1407 UM001H EN P November 2014 51 Chapter3 CGCM Unit Operation Over excitation Limit Over excitation limiting OEL operates in all modes except FCR The CGCM unit senses and limits the field current to prevent field overheating When the limit is reached the limiter function overrides AVR VAR or Power Factor modes to limit field current to the preset level OEL operates in the area above the Field Winding Heating Limitation curve in the generator capability curve The generator operates in one of two different states offline or online The generator is offline when it is operating in a constant voltage mode The CGCM unit is considered online if any of these modes are en
186. m low frequency operation and or over voltage V Hz limiter has been designed with an adjustable slope Ky 4z from flat to 3 pu V Hz When the system is in an under frequency condition the voltage reference is adjusted by the amount calculated based on two programmable parameters the corner frequency and the V Hz slope Its mathematical model is shown in V Hz Limiter Figure 67 V Hz Limiter VREF generator 10 AVR frequency T Summing Point Corner Kviz z g frequency 0 Ve Rockwell Automation Publication 1407 UM001H EN P November 2014 193 AppendixB CGCM Unit Math Models Soft Start Control The soft start control function is provided to cause orderly build up of terminal voltage from the residual voltage to the rated voltage in desired time with minimal overshoot In CGCM units the fast dynamic response is used while the voltage reference is adjusted based on the elapsed time When the system is under start up condition the voltage reference is adjusted by the amount calculated based on two programmable parameters initial soft start voltage level Vo and desired time Ts to build up to the rated voltage Its mathematical model is shown in Soft Start Control The soft start gain Kgg is calculated by using this formula Kss Vrer Vo Tss Figure 68 Soft Start Control AVR Summing Point SS Time From Start Vo 194 Rockwell Automation Publication 1407 UMO001H EN P Novemb
187. mands and setpoints from the host controller to the CGCM unit e The Unscheduled Read table provides non time critical metering data from the CGCM unit to the host controller e The Unscheduled Write table provides a means to adjust selected gains and in firmware revision 3 x or later energy counter presets while excitation is enabled The Configuration table contains the basic CGCM unit configuration parameters and is automatically transferred from the host controller to the CGCM unit on powerup and at other times when excitation is not enabled Refer to Chapter 6 CGCM Unit Software Interface for more detailed information on the CGCM unit software interface The following sections describe the operational functions of the CGCM unit The functions include the following e Excitation Control Modes e Limiting Functions e Protection Functions e Synchronizing e Real power Load Sharing e Metering e Redundancy e Watchdog Timer Rockwell Automation Publication 1407 UM001H EN P November 2014 43 Chapter 3 44 CGCM Unit Operation Excitation Control Modes The CGCM unit controls the DC excitation current of the generator exciter based on a number of factors including the following The selected control mode The configuration of the CGCM unit including gains e Measured generator voltage and current e The applicable setpoint or setpoints e The value of the Auxiliary Input e Various limiting functi
188. mation Publication 1407 UM001H EN P November 2014 5 Table of Contents CGCM Unit Math Models Additional ControlNet Network Information Specifications Detailed CGCM Unit Tag Descriptions Configuration Record Worksheet Index Appendix B redd see Synchronous Machine Terminal Voltage Transducer and Load Compensator Model raisuantetrrkrn seere ENG Voltage Regulator sanser VAR Power Factor Controller 0 ccc cece uceseacncucseees Eimitersa rsta Sarre VA Emiter svarte de ad Saturn EG Field Current Regulator noncSensiaceenevdacerenieveierseecetnas 44 Appendix C ControlNet Application Objects vaar badssksvksesenk ne Appendix D Appendix E Generator Parameters and Configuration Status 4 General Excitation Control Modes c0ccecececceeeevecs DN RR NM eats hs oop ea se NE FOR Moderat setet a a a aha tek Panes Power Factor Mode ra VAR N d se ES Excitation ControlP tiressarusnss id asveee sd Protection send hava nsdn bre bees nm dastedarsrtestusfeet Sriekrona karse SSG oad Sharing arte Mee Sek Redunaaney s 12 sachet wee toad eh ees eh Rie oh i aie elle thal Appendix F Generator Information 0 cee cece cece c cece eee eeeneeenas 6 Rockwell Automation Publication 1407 UM001H EN P November 2014 Preface The information in this manual applies to the 1407 CGCM module Series D Revision A with host firmware revision 4 25 and ControlNet firmware revision 1 07
189. mber 2014 Detailed CGCM Unit Tag Descriptions Appendix E Line drop Compensation Inputs to the CGCM Unit LineDropComp This tag configures the amount of voltage droop that is experienced during paralleling generator applications Under excitation Limit Inputs to the CGCM Unit UEL_En Setting this tag enables the Under excitation Limiting function UEL_Kg This tag lets you adjust the proportional gain of the Under excitation limiter It also determines the response of the limiter to an Under excitation event Increasing this term increases the speed of the response of the limiter UEL Ki This tag lets you adjust coarse loop gain and overall gain of the Under excitation limiter This tag determines the characteristic of the dynamic response to an Under excitation event UEL_Curve_W_Pt1 This tag is used as the Watt coordinate in the first Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve UEL_Curve_W_Pt2 This tag is used as the Watt coordinate in the second Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve UEL_Curve_W_Pt3 This tag is used as the Watt coordinate in the third Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve UEL Curve W Pt4 This tag
190. ment Configuration Parameter and Wiring Changes Oo IQ 10 11 12 CGCM Unit Startup Chapter 5 Set the Shorted Diode Level to a value that is 50 times the highest normal percent ripple found above The multiplier can be varied from 40 70 to adjust the trip margin Regardless of the calculated value the level has a maximum value of 70 Reducing the multiplier could result in nuisance EDM shorted diode indications Set the EDM time delays as desired Disable excitation and shut down the prime mover Disconnect one diode to create an open diode condition Start the prime mover enable excitation and verify that the CGCM unit annunciates an open diode fault Disable excitation and shut down the prime mover Reconnect the diode disconnected above Start the prime mover enable excitation and verify that the CGCM unit no longer annunciates an open diode fault When all tests have been performed and all adjustments are complete use the configuration record to document the installed configuration Use the system design documentation to clearly identify any required changes made to CGCM unit s related wiring See Appendix F for the configuration record Rockwell Automation Publication 1407 UM001H EN P November 2014 125 Chapter5 CGCM Unit Startup Notes 126 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Introduction Chapter b CGCM Unit Software Interface This chapter pr
191. meter Other Gains The remaining three gains are stored in the Configuration table and can only be written to the CGCM unit when excitation is disabled Please refer to Chapter 6 for more information e AVR FCR Control Auxiliary Gain Sets the influence of the auxiliary input on the AVR FCR operating setpoint The units are percent of rated generator voltage or excitation field current as applicable per auxiliary input volt The tag AVR_FCRAuxGain in the Configuration table stores this parameter e PF VAR Auxiliary Gain Sets the influence of the auxiliary input on the VAR PF operating setpoint The units for the var controller are percent of rated generator KVA For PF control the units are 0 01 PF per volt A setting of 5 results in the regulated PF being changed by 0 05 for each volt applied to the auxiliary input The tag PF_VARAuxGain in the Configuration table stores this parameter e Cross current Gain sets the gain of the cross current input The measured cross current value is multiplied by this setting This setting determines the change in voltage setpoint expressed in percent of rated voltage for a change in kVARs equal to the rated generator kVA This parameter adjusts the characteristic of VAR sharing between machines connected in the cross current compensation method of VAR sharing A setting of 5 for example results in the voltage setpoint being changed by 5 of rated voltage for a change in kVARs equal to the rated
192. mpensation Inputs to the CGCM Unit e Droop_CCC_Select If Droop is enabled this bit selects CCC when set to 1 or Droop when set to 0 e CrossCurrentGain This setting lets you adjust the gain of the cross current input The actual value measured by the cross current input is multiplied by this setting It can be used to improve the var sharing between machines connected in cross current Rockwell Automation Publication 1407 UM001H EN P November 2014 219 Appendix E Detailed CGCM Unit Tag Descriptions Over excitation Limit Inputs to the CGCM Unit OEL En Setting this tag enables the Over excitation Limiting function OEL Kg This tag lets you adjust the proportional gain of the Over excitation limiter It also determines the response of the limiter to an Over excitation event OEL Ki This tag lets you adjust coarse loop gain and overall gain of the Over excitation limiter This tag determines the characteristic of the dynamic response to an Over excitation event OEL_OnLineHiSetpt This tag sets the high current level for the online over excitation limiting function The CGCM unit s over excitation limiter limits excitation current at this level Operation at this level is allowed for a time no longer than programmed in the OEL OnLineHiTimeDly tag OEL OnLineHiTimeDly This tag sets the amount of time the online over excitation limiting function lets the unit operate at the excitation current level programmed in the
193. mum of 600V General appliance wire rated for minimum temperatures of 105 C 221 F is acceptable All wire must be copper Select circuit conductors based on good design practice The wire gauge range listed in the Terminal Block Label Description table indicates the physical capabilities of the connector The CGCM unit s terminals are on the front bottom and right panel of the unit The nine pin connector on the bottom of the unit is used for communication between CGCM units in a redundant system Suggested torque for terminal screws is I Nem 9 Ibein Refer to pages 17 34 for typical connection diagrams Terminals to be used as landing points for shielded wires are provided on several terminal strips Shield terminals with the same name are internally connected together but are not connected to protective earth or any internal unit circuitry Table 1 Terminal Block Label Description Terminal Block TB1 TB2 Wire Gauge Range 2 6 2 1 mm 10 12 AWG Label Description PMG A Phase A excitation power supply PMG B Phase B excitation power supply three phase only PMG C Phase C excitation power supply SHLD1 Shield 1 landing points are tied together but are not connected internally to protective earth or other unit circuitry SHLD1 SHLD2 Shield 2 landing points are tied together but are not connected internally to protective earth or other unit circuitry SHLD2 EXC Excitat
194. n Publication 1407 UM001H EN P November 2014 211 Appendix D Specifications Notes 212 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Appendix E Detailed CGCM Unit Tag Descriptions Generator Parameters and This section describes the generator parameters and configuration status input Configuration Status and output tags for the CGCM unit Inputs to the CGCM Unit e GenVT Pri V This tag defines the rated primary voltage for the Generator potential transformers e GenVT Sec V This tag defines the rated secondary voltage for the Generator potential transformers BusA_VT_Pri_V This tag defines the rated primary voltage for the BusA potential transformers e BusA VT Sec V This tag defines the rated secondary voltage for the BusA potential transformers BusB_VT_Pri_V This tag defines the rated primary voltage for the BusB potential transformers BusB VT Sec V This tag defines the rated secondary voltage for the BusB potential transformers e GenCT Pri I This tag defines the rated primary current for the Generator current transformers e GenCT Sec I This tag defines the rated secondary current for the Generator current transformers e CCCT Pri I This tag defines the rated primary current for the cross current transformers e CCCT Sec I This tag defines the rated secondary current for the cross current transformers e GenVT Config This tag defines the wiring configurati
195. n Select Selects the excitation power source This parameter is stored in the Boolean tag PMG_Shunt_Select in the Configuration table In this tag 0 PMG 1 Shunt Select PMG to enable the loss of PMG sensing Select Shunt for obtaining excitation power from the generator s terminals and for systems using series boost PMG Phase Select Establishes whether the excitation power source to the CGCM unit is single or 3 phase to assure correct operation of the loss of PMG sensing function This parameter is stored in the Boolean tag PMG 1Ph 3Ph Select in the Configuration table In this tag 0 single phase 1 3 phase Related Parameters e Over excitation voltage protection Over excitation limiting OEL configuration parameters e GenRated_V Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 Volts Hz Tab The Volts Hz tab is used to configure the unit s settings related to operation of the Volts Hz compensation function The parameters define a curve which determines the Volts Hz response 8 Module Properties Report CNBR 1407 CGCM 4 1 Ex Voltage Current Frequency Power UEL _OEL Fault Relay General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking Load Share Synch Volts Hz ganan 57 0 Hz SG Underfrequency Slope Upper Slope 10 Volts Hz 804 Lower Knee Frequency 5
196. n that of the reference bus Lower_V This tag indicates to the host Logix controller that the synchronizing bus has a lower voltage level than that of the reference bus e Raise_Freq This tag indicates to the host Logix controller that the synchronizing bus is producing voltage at a frequency lower than that of the reference bus Lower_Freq This tag indicates to the host Logix controller that the synchronizing bus is producing voltage at a frequency higher than that of the reference bus Raise Ph This tag indicates to the host Logix controller that the synchronizing bus is producing a voltage that is between 0 and 180 degrees behind the reference bus Lower Ph This tag indicates to the host Logix controller that the synchronizing bus is producing a voltage that is between 0 and 180 degrees ahead of the reference bus e ActiveBusA B This tag provides feedback as to which reference bus is being monitored Load Sh aring This section describes the load sharing inputs and outputs for the CGCM unit Load Sharing Inputs to the CGCM Unit e KVAR LS BridgeEn This tag is reserved for future use KVAR LS En This tag is reserved for future use must be set to I in conjunction with kW LS EN tag in Rev 2 x e kW LS BridgeEn When this tag is set to 1 the CGCM unit uses the value of kw AnalogTargetPU Value as the kW Load Share setpoint to provide appropriate bias to the analog units connected to the LS lines kW LS E
197. nals insufficient voltage is measured Excitation output is less than setpoint FCR not selected enabled Check excitation enable hardware and software and FCR select Correct Logix controller logic or 1 0 as required Wiring error Check wiring for excitation enable excitation current output fuses open grounding and PMG supply Correct wiring as required Insufficient supply power Measure Voltage at CGCM unit PMG supply input terminals Correct supply anomaly if insufficient voltage is measured Field resistance too great Disconnect field current outputs at CGCM unit and measure load resistance Correct verify load resistance is within CGCM unit capability Gain mis adjusted Check gains entered into CGCM unit configuration Rockwell Automation Publication 1407 UM001H EN P November 2014 Calculate adjust as required 153 Chapter7 Troubleshooting Table 19 Excitation Control FCR Symptom Excitation output is greater than setpoint Most Likely Cause FCR not selected enabled Diagnostic Action Check excitation FCR select Corrective Action Correct Logix controller logic or 1 0 as required Wiring error Check wiring for excitation current output fuses open grounding and PMG supply Correct wiring as required Gain mis adjusted Check gains entered into CGCM unit configuration Calculate adjust as required Excitation is errati
198. nate in the fifth Watt VAR coordinate pair that in combination with four other Watt VAR coordinate pairs lets you enter an Under excitation Limiting curve Under excitation Limit Outputs from the CGCM Unit UEL_Active This tag is set to I when the exciter is operating in the Under excitation Limiting mode This section describes the protection tags for the CGCM unit General Protection Inputs to the CGCM Unit FltReset This tag is used by the host Logix controller to indicate to the CGCM unit that it has observed the fault condition reported by the CGCM unit and wants the fault condition reset General Protection Outputs from the CGCM Unit e FltOut This tag indicates that one of the configured protection faults has gone active FitResetAck This tag reports to the host Logix controller that the activation of the FltReset tag has been received by the CGCM unit and the protective fault has been cleared Loss of Excitation Inputs to the CGCM Unit e LossExcFltOutEn When this tag is a I in the configuration and a Loss of Excitation Fault occurs as defined by the LossExc_I_Setpt tag the Fault Relay is energized When this tag is a 0 in the configuration a Loss of Excitation Condition has no effect on the Fault Relay e LossExc_I_Setpt This tag configures the level of the CGCM unit s DC output current that is considered to be a minimum needed to maintain generator synchronization when in parallel w
199. nction is disabled during soft start timing or when the Engineldle tag is set If this fault occurs tag Undr_V_Flt 1 in the Scheduled Read table Rockwell Automation Publication 1407 UM001H EN P November 2014 55 Chapter3 CGCM Unit Operation Loss of Sensing 60FL For three wire and four wire sensing Loss of Sensing detection is based on the logical combination of several conditions They include these conditions 1 The average positive sequence voltage is greater than 8 8 of the AVR setpoint The negative sequence voltage is greater than 25 of the positive sequence 8 q geis g P q voltage The negative sequence current is less than 17 7 of the positive sequence current The positive sequence current is less than 1 of rated current for 0 1 seconds The generator positive sequence voltage is less than 8 8 of the AVR setpoint The positive sequence current is less than 200 of the rated current for 0 1 seconds The three phase loss of sensing is expressed by this logical formula Loss of Sensing 1 and 2 and 3 or 4 or 5 and 6 For single phase sensing Loss of Sensing is detected when the following conditions exist in the proper logical combination 1 The average generator terminal line to line voltage is less than 70 of the AVR setpoint The positive sequence current is less than 200 of the rated current The negative sequence current is less than or equal to 17 7
200. ncy 60 049999 Hz Max Voltage 500 0 Volts Status Offline OK Cancel App Help Synchronization Limits e Frequency Match Establishes the acceptance window for frequency matching defined by Configuration table tags SyncFreqLoLimit and SyncFreqHiLimit These tags are set by using the Lower Limit and Upper Limit fields in the Synch tab and are expressed in Hertz Voltage Match Establishes the acceptance window for voltage matching defined by Configuration table tags SyncV_LoLimit and SyncV_HiLimit These tags are set by using the Lower Limit and Upper Limit fields in the Synch tab and are expressed in percent of rated generator voltage e Phase Match Establishes the acceptance window for phase matching defined by Configuration table tags SyncPhLoLimit and SyncPhHiLimit These tags are set by using the Lower Limit and Upper Limit fields in the Synch tab and are expressed in degrees e Acceptance Delay Establishes the time that all sync parameters must be continuously within their respective acceptance windows to permit closing the breaker The Configuration table tag SynchAcceptDly stores this value expressed in seconds 96 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 Bus A Offsets e Voltage multiplier Establishes a factor by which the Bus A voltage is scaled during synchronization It can be used to compensate for transformer ratio differences between the
201. nel layout 38 chassis ground 20 Combination Generator Control Module See CGCM communication 42 164 ports 11 42 com 0 42 com 1 42 ControlNet 42 factory test 42 redundancy 42 software inputs and outputs 43 communication connectors and settings 35 ControlNet port 36 redundancy port 35 configuration 71 overview 71 preparation 71 record worksheet 237 tabs 76 current 102 excitation 80 fault relay 105 frequency 103 gain 88 generator 77 load share 99 Index OEL 84 power tab 104 synch 96 tracking 92 transformers 78 EL 86 voltage 100 volts hertz 83 control functions 9 control power 19 ControlLogix controller creating new module 72 electronic keying 74 ControlNet application objects 197 assembly object 200 data types 197 identity object 197 ControlNet information 197 create new module ControlLogix controller 72 cross current compensation 33 46 inputs 219 current sensing 20 current tab 102 over current 102 curve specifications 169 D data tables 132 abbreviations 133 assembly object properties 133 configuration 145 input data table 134 output 137 terms 132 unschedule write 143 unscheduled read 140 definite time over frequency 225 226 inputs 225 outputs 226 definite time under frequency inputs 226 outputs 226 device setup 75 applying configuration 75 configuration tabs 76 dimensions 14 discrete inputs 40 remote excitation enable 40 discrete outputs 30 42 fault 42 fault relay 31 redundancy relay 31
202. nerator field When the excitation outputs from two CGCM units are connected through relays to the generator exciter field you must place flyback diodes across the generator field winding to provide a path for exciter current during a transfer To prevent errors in field current measurement place three or four diodes in series If fewer diodes are used the field current splits between the external diode and the internal circuitry and prevent the current measurement circuit from sensing the total field current Redundancy Operation CGCM units in a redundant system must both be connected to the generator and bus VTs and the generator and cross current CTs as applicable Connect the units excitation outputs through the relays you provide to the generator exciter field In addition properly connect the redundancy communication cable and verify that the CGCM unit configurations match CGCM units used in a redundant configuration are normally designated as primary and secondary depending on the order in which the host controller enables excitation With excitation disabled each CGCM unit starts out in a Secondary mode When the host controller enables excitation on the first CGCM unit it checks for tracking information on the redundancy communication channel If no tracking information is received the CGCM unit switches to Primary mode When the host controller subsequently enables excitation on the secondary CGCM unit it begins receiving trac
203. nfiguration a these conditions has no effect on the Fault Relay e OpenDiodeMonitorLevel This tag sets the percent ripple at which the rotating diode monitor alarm announces when an open diode condition occurs ShortedDiodeMonitorLevel This tag sets the percent ripple at which the rotating diode monitor alarm announces when a shorted diode condition occurs e DiodeMonitorTimeDly This tag sets the amount of time the CGCM unit takes before the CGCM unit announces the rotating diodes have an anomaly e MainPole This tag sets the number of poles of the main field of the generator e ExciterPole This tag sets the number of poles of the exciter field of the generator Rotating Diode Monitor Outputs from the CGCM Unit e RotDiodeFlt This tag is used to communicate the occurrence of a Shorted or Open Rotating Diode Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag e ShortedRotDiodeFlt This tag indicates that a Shorted Rotating Diode Fault caused the RotDiodeFlt tag to be set e OpenRotDiodeFlt This tag indicates that an Open Rotating Diode Fault caused the RotDiodeFlt tag to be set Phase Rotation Check Inputs to the CGCM Unit PhRotFltOutEn When this tag is a 1 in the configuration and a Phase Rotation Fault occurs the Fault Relay is energized When this tag is a 0 in the configu
204. nfiguration Received 0 False True Bool 1 UnschdWriteRcvd Unscheduled Write Received Bool 2 Spare6 Bool 3 Spare7 Bool 4 Spare8 Bool 5 kVAR_LS_ Active kVAR Load Share Active O Inactive 1 Active Bool 6 Spare9 Bool 7 KW LS Active KW Load Share Active O Inactive 1 Active 12 4 Real N A Total kW Total kW kW 3E 09 3E 09 16 4 Rea N A LS_Err Load Share Error 20 4 Rea N A W_LS_Input_V kW Load Share Input Voltage Volts 24 4 Rea N A kW_PU_Load kW Load Per Unit 0 5 28 4 Rea N A W_AnalogPU_Load kW Analog Value Per Unit 0 1 32 4 Real N A VAR LS InputV KVAR Load Share Input Voltage Volts 0 1 36 4 Rea N A VAR_PU_load kVAR Load Per Unit 40 4 Rea N A VAR_AnalogPU_Load KVAR Analog Value Per Unit 0 1 44 4 Real N A AvgLLGenV Average Generator LL Voltage Volts 0 30 000 136 Rockwell Automation Publication 1407 UM001H EN P November 2014 Table 7 Scheduled Read Data Table CGCM Unit Software Interface Chapter 6 Byte Size in Type Bits Tag Name Description Units Range Bytes 48 4 Rea N A V MatchErr Voltage Match Error KV 100 100 52 4 Rea N A FreqMatchErr Frequency Match Error Hz 90 90 56 4 Rea N A PhMatchErr Phase Match Error Deg 180 180 60 4 Rea N A GenFreq Generator Frequency Hz 10 90 64 4 Rea N A BusFreq Active Bus Frequency Hz 10 90 68 4 Rea N A Spare10 72 4 Rea N A Spare11 Qutput scheduled write Data Table The Output data table contains time c
205. ng the ControlNet connections or removing 24V DC control power from the primary CGCM unit 3 Verify that control transfers to the back up CGCM unit and that its status is now primary Test Synchronization Synchronization testing is performed by using external independent metering equipment connected directly to the main leads at the circuit breaker This test verifies that the CGCM unit properly synchronizes the generator to the reference bus Generator Breaker in Test Position Follow these steps to test synchronization when the generator breaker is in the test position 1 Verify the generator main circuit breaker is in a test position that prevents the breaker from closing when the CGCM unit issues a close command 2 Observe the generator voltage bus voltage frequencies and phase synchronization by using independent metering equipment 3 Initiate synchronization in the CGCM unit 4 Confirm that the CGCM unit reports appropriate error signals and issues a close command when appropriate as indicated by independent metering equipment Generator Breaker in Normal Position Follow these steps to test synchronization when the generator breaker is in the normal position 1 Place the generator main circuit breaker into the normal position that enables the breaker to close when the CGCM unit issues a close command 2 Select manual load control for the prime mover 3 Select Voltage Droop mode for the CGCM unit 4 Init
206. nits Two settings you configure are provided The redundant tracking rate defines the rate at which the primary CGCM unit matches the output of the secondary CGCM unit with its own output and is scaled in seconds per full scale excursion of the excitation output Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 The redundant tracking delay setting adjusts the delay of the tracking function to prevent the secondary CGCM unit output from being adjusted into an undesirable condition For example with AVR mode active in the primary CGCM unit ifthe generator sensing VT fails open the excitation output goes to a full on state Applying a tracking delay reduces the likelihood of this undesirable operating point to be transferred to the secondary CGCM unit when it takes over control Watchdog Timer A watchdog timer time out is an indication that the CGCM unit is not capable of executing the proper instructions including those required to energize the fault output When the Watchdog Timer times out the CGCM unit removes excitation from the system the CGCM unit internal microprocessor is reset and the output relays fault and redundancy are disabled Rockwell Automation Publication 1407 UM001H EN P November 2014 69 Chapter3 CGCM Unit Operation Notes 70 Rockwell Automation Publication 1407 UM001H EN P November 2014 Introduction Overview of the Configuration Process Preparation
207. no scheduled connection to it Otherwise it returns the error CI GRO BAD 0BJ MODE Configuration Checking No range checking is performed on the Output data table Data Table Table 10 Output scheduled write Data Table Assembly Instance 1 Byte Size Type Bits Tag Name Description Units Range in Bytes 0 1 Boo 0 RevVARFItOutEn Reverse VAR Fault Output Enable 0 Disabled 1 Enabled Boo 1 RevPwrFitQutEn Reverse Power Fault Output Enable Boo 2 OvrExcFltOutEn Over excitation Fault Output Enable Boo 3 Ovr I FltQutEn Over current Fault Output Enable Boo 4 Undr_V_FitOutEn Under voltage Fault Output Enable Boo 5 Ovr V FltQutEn Over voltage Fault Output Enable Boo 6 UndrFreqFltOutEn Under frequency Fault Output Enable Boo 7 OvrFreqFltOutEn Over frequency Fault Output Enable 1 1 Boo 0 Spare1 Boo 1 LossExcFltOutEn Loss Excitation Fault Output 0 Disabled Enable 1 Enabled Boo 2 OEL En Over excitation Limiting Enable Boo 3 UEL_En Under excitation Limiting Enable Boo 4 LossSensingFltQutEn Loss Sensing Fault Output Enable Boo 5 LossPMGFLtOutEn Loss Permanent Magnet Generator Fault Output Enable Boo 6 RotDiodeFltOutEn Rotation Diode Fault Output Enable Boo 7 PhRotFltQutEn Phase Rotation Fault Output Enable 138 Rockwell Automation Publication 1407 UM001H EN P November 2014 Table 10 Output scheduled write Data Table Assembly Instance 1 CGCM Unit Software Interfa
208. nstallation Generator Current Connections 32 Figure 20 Typical Redundancy Current Sensing Connection Diagram CGCM 1 Typical connection for one current input Other current inputs including the cross current input should duplicate CGCM 2 Customer TB3 Supplied CT Shorting Blocks or Test Block Figure 21 Typical Redundancy Excitation Power Connection Diagram PMG Voltage Connections CGCM 1 CGCM 2 Figure 22 Typical Redundancy Relay Connection Diagram Exciter Voltage Connections TB2 User provided Relay Flyback Diodes RD RLY LO Exciter Field User provided Relay Rockwell Automation Publication 1407 UM001H EN P November 2014 Installation Chapter 2 Real power Load Sharing The load sharing terminals connect to a 0 5V DC internally powered circuit The load sharing terminals are on TB7 and are labeled LS and LS Terminal SHLD4 is provided to land the cable shield Twisted shielded cabling is required for the load sharing connections Figure 23 Real power Load Sharing a TB7 CGCM2 TB7 CGCM3 Ground shield at only one point Cross current Compensation The Cross current reactive differential Compensation Connection Diagram on page 34 shows a typical connection diagram for three paralleled generators using the 5 A sensing input range on the AC current input Make connections with 2
209. o help ensure that they are fully operational when shipped from the manufacturing facility However if your product is not functioning and needs to be returned follow these procedures United States Contact your distributor You must provide a Customer Support case number call the phone number above to obtain one to your distributor to complete the return process Outside United States Please contact your local Rockwell Automation representative for the return procedure Documentation Feedback Your comments will help us serve your documentation needs better If you have any suggestions on how to improve this document complete this form publication RA DU002 available at http www rockwellautomation com literature Rockwell Automation maintains current product environmental information on its website at http www rockwellautomation com rockwellautomation about us sustainability ethics product environmental compliance page Rockwell Otomasyon Ticaret A Kar Plaza Is Merkezi E Blok Kat 6 34752 erenk y stanbul Tel 90 216 5698400 www rockwellautomation com Power Control and Information Solutions Headquarters Americas Rockwell Automation 1201 South Second Street Milwaukee WI 53204 2496 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Europe Middle East Africa Rockwell Automation NV Pegasus Park De Kleetlaan 12a 1831 Diegem Belgium Tel 32 2 663 0600 Fax 32 2 663 0640 Asia Pacific Rockwell Automa
210. o maintain the commanded field current setpoint The FCR feedback loop includes adjustable proportional integral and derivative gains In FCR mode automatic voltage control reactive power control power factor control over excitation limiting and under excitation limiting are disabled To activate FCR mode the gains must be set e FCR mode must be selected tag AVR_FCR_Select 1 the desired setpoint must be written to the FCRSetpt tag e excitation enabled tag SoftwareExcEn 1 remote Excitation Enable On discrete input Automatic Voltage Regulation Mode AVR AVR mode provides automatic control of the excitation current In AVR mode the CGCM unit controls field excitation current output to maintain the commanded generator voltage setpoint The AVR feedback loop includes adjustable proportional integral and derivative gains To activate AVR mode the metering VTs must be properly connected and configured the AVR gains must be set AVR mode must be selected tag AVR_FCR_Select 0 e the desired setpoint must be written to the AVRSetpt tag e excitation enabled tag SoftwareExcEn 1 remote Excitation Enable On discrete input for constant voltage control droop must be disabled tag V_DroopEn 0 Droop reactive current compensation Droop reactive current compensation is a method of controlling reactive current when a generator is connected in parallel with another energy source Droop
211. o the produced VARs In the following step be prepared to transfer back to AVR Droop mode if the excitation increases or decreases suddenly Transfer to VAR Control mode 5 Adjust the VARs to 30 of the rated VA value Monitor the exciter field current and metered VARs to determine performance during the following step Perform a 5 step of the VAR setpoint and observe the response of the automatic VAR control Adjust gains as required to achieve the desired result and run the test again Rockwell Automation Publication 1407 UM001H EN P November 2014 121 Chapter5 CGCM Unit Startup PF Control Perform this test with the generator operating in parallel with a large power source that is maintaining constant voltage Follow these steps to test the PF control operation 1 2 Place the voltage control in Droop mode Adjust the prime mover to produce a constant power of approximately 25 of rated output Verify that the PF setpoint is adjusted to the measured PF Be prepared to transfer back to AVR Droop mode if the excitation increases or decreases suddenly Transfer to PF Control mode Monitor the exciter field current and metered PF to determine performance during the following step Perform a 0 10 step of the PF setpoint and observe the response of the automatic PF control Adjust gains as required to achieve the desired result and run the test again Real Power Load Sharing Operation
212. oad Share Synch Frequency Power _ are us OE Fault Relay Over frequency Setpoint Establishes the generator over frequency setpoint The tag OvrFreqSetpt in the configuration table stores this parameter expressed in Hz Over frequency Delay Establishes the amount of time in seconds that the frequency must be above the over frequency setpoint before the CGCM unit annunciates the fault This parameter is stored in tag OvrFreqTimeDly in the configuration table Under frequency Setpoint Establishes the generator under frequency setpoint The tag UndrFreqSetpt in the configuration table stores this parameter expressed in Hz Under frequency Delay Establishes the amount of time in seconds that the frequency must be below the under frequency setpoint before the CGCM unit annunciates the fault This parameter is stored in tag UndrFreqgTimeDly in the configuration table Related Parameters e Engineldle SoftStartTime Rockwell Automation Publication 1407 UM001H EN P November 2014 103 Chapter4 CGCM Unit Configuration Power Tab The Power tab is used to configure the unit s parameters related to reverse power and reverse reactive power protection A higher setpoint value corresponds to larger reverse power or VAR flow before a fault is declared a Module Properties Report CNBR 1407 CGCM 4 1 X General Connection Module Info Generator Transformers Excitation al Vo
213. odes e AVR FCR Ki This tag sets the Integral Gain parameter for AVR and FCR control modes e AVR FCR Kd This tag sets the Derivative Gain parameter for AVR and FCR control modes e AVR_FCR_Td This tag sets the filtering Time Constant for AVR and FCR control modes e FCR_Kg This tag lets you adjust coarse loop gain and overall gain of the FCR operating mode It also determines the characteristic of the dynamic response to a change in the CGCM unit s output current e FCR_Traverse_Rate This parameter determines the time measured in seconds for the setpoint to move from zero to the rated exciter current It determines how fast the regulator changes the field current setpoint from the tracking value to the operating setpoint when the Regulator Operating mode changes to FCR e AVR_FCRAuxGain This tag lets you adjust the overall gain of the auxiliary input s control on the AVR FCR operating mode The units for this are percent of nominal per volt A setting of one results in the controlled parameter being changed by one percent of the nominal value for each volt applied to the auxiliary input FCR Mode Outputs from the CGCM Unit The FCR mode has one output e AVR FCR Selection This tag reports the selection of AVR or FCR control see AVR FCR Select 216 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Power Factor Mode Detailed CGCM Unit Tag Descriptions Appendix E This section describes the Pow
214. oduct Name 7 CHAR 1407 CGCM DC Series C or earlier ControlNet Series D Table 43 Device Status Bits Name Notes 0 Module Owned 1 reserved 2 Configured 3 reserved 4 7 Extended Device 0000b Unknown Status Value eaning 0010b Faulted 1 0 Connection 0011b No I O connection established 0100b Nonvolatile configuration bad 0110b Connection in Run mode 0111b Connection in Idle mode 8 Set for minor recoverable faults 9 Set for minor unrecoverable faults 10 Set for major recoverable faults 11 Set for major unrecoverable faults 12 reserved 15 Ul This bit shows if the product has other settings than out of box The value is set to true if the configured attribute in the application object is set and or the module s NV storage is changed from default Rockwell Automation Publication 1407 UM001H EN P November 2014 199 Appendix C 200 Additional ControlNet Network Information Reset Service Code The Reset service for instance I of the Identity Object requests that a CGCM unit s communication reset be performed If excitation is enabled the request is denied If excitation is not enabled the request is accepted If a reset is accepted the CGCM unit resets the entire CGCM unit and communication with the Logix controller is lost After the reset is complete the CGCM unit automatically starts communicating and is immediately ready for normal
215. on Chapter 2 Figure 10 Voltage and Current Connection for Four wire Wye Bus and Four wire Wye Generator System with Grounded Neutral L1 L2 L3 N i _ VBus B VBusC gt _ VBusN TB6 cB le VGenA VGenB o VGenC Fo veen N reactive compensation loop TG S e hpa a ID 5A Fe DE an p e Ba i ews L 1130 EJ 1 pg FB A 21 12 5A Too T D F 5 11 1A Oo a jno ull TB3 Customer Supplied CT Shorting Switch or Test Cross current CT input Block not required for parallel droop operation FT I Rockwell Automation Publication 1407 UM001H EN P November 2014 23 Chapter2 Installation Figure 11 Voltage and Current Connection for Four wire Wye Bus and Two or three Transformer Delta Generator System Optional y Use of a third potential transformer is optional The CGCM unit can be connected in either open or closed delta Customer Supplied CT Shorting Switch or Test Cross current CT input Block not required for parallel droop operations 24 Rockwell Automation Publication 1407 UM001H EN P November 2014 Installation Chapter 2 Figure 12 Voltage and Current Connection for Two or three Transformer Delta Bus and Four wire Wye Generator System Optional Ground Use of a third potential transformer is optional The CGCM unit can be connected in either open or closed delta o VGenA VGenB
216. on of the generator system e BusVT Config This tag defines the wiring configuration of the bus system e GenRated W This tag defines the rated power for the Generator e GenRated V This tag defines the rated voltage for the Generator e GenRated I This tag defines the rated current for the Generator e GenRatedFreq This tag defines the rated frequency for the Generator e GenRatedExcV This tag defines the rated excitation voltage for the Generator e GenRatedExcl This tag defines the rated excitation current for the Generator Rockwell Automation Publication 1407 UM001H EN P November 2014 213 Appendix E Detailed CGCM Unit Tag Descriptions PMG Shunt Select This tag selects whether the CGCM unit receives power input voltages from the generator s terminals shunt or from a permanent magnet generator PMG If PMG is selected then the information for the PMG Phase Select parameter must be provided PMG_1Ph_3PhSelect This tag configures whether the PMG power applied to the CGCM unit is single or 3 phase Outputs from the CGCM Unit e ConfigRcvd This tag reports whether a valid Configuration has been received from the host Logix controller A 1 indicates a valid configuration This bit must be a 1 to allow scheduled data transfers to occur UnschdWriteRcvd This tag reports whether a valid Unscheduled Write has been received from the host Logix controller This bit must be a 1 to allow sch
217. onfiguration Check configuration Correct as required Rockwell Automation Publication 1407 UM001H EN P November 2014 167 Chapter7 Troubleshooting Notes 168 Rockwell Automation Publication 1407 UMO001H EN P November 2014 General Curve Specifications Appendix A Time Over current Characteristic Curves The CGCM unit time over current protection function provides time current characteristic curves that closely emulate most of the common electromechanical induction disk relays manufactured in North America To further improve relay coordination selection of integrated reset or instantaneous reset characteristics is also provided Timing Accuracy all 51 functions within 5 or 1 cycles F R response or 1 3 cycles A response whichever is greater for time dial settings of D greater than 0 1 and multiples of 2 40 times the pickup setting but not over 150 A for 5 ACT units or 30 A for 1 A CT units Sixteen inverse time functions and one fixed time function can be selected Characteristic curves for the inverse and definite time functions are defined by the following equations Figure 41 Equation 1 hever N M C Figure 42 Equation 2 R D TrR 1 I 1l TT Time to trip when M 1 TR Time to reset if relay is set for integrating reset when M lt 1 Otherwise reset is 50 ms or less D T IME DIAL setting 0 0 9 9 M Multiple of PICKUP setting 0 40 A B C N K Constants for th
218. ons The CGCM unit offers several modes of regulation that are selected and activated by using the software interface to the host Logix programmable controller An active ControlNet network connection must exist with the host Logix controller for any regulation mode to be active The CGCM unit automatically shuts down excitation if one of these faults occurs e Overexcitation voltage e Reverse VAR e Logix controller fault Gains The CGCM unit regulates excitation current by using a proportional integral and derivative PID control algorithm The regulatory response of the CGCM unit is determined by your gain settings The gains for each mode include the following e Proportional Gain Kp determines the basic response to changes in generator voltage e Integral gain Ki speeds the return to steady state voltage after a disturbance e Derivative gain Kd speeds the initial regulator response to a disturbance e Overall gain Kg adjusts the coarse loop gain of the regulator e Auxiliary Gain adjusts the effect of the auxiliary input on the regulator output Please refer to Chapter 4 CGCM Unit Configuration for more detailed information Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Operation Chapter 3 Field Current Regulation Mode FCR FCR mode provides manual control of the excitation current In FCR mode the CGCM unit measures and controls its field excitation current output t
219. or Brkr Breaker Min Minimum CCC Cross Current OEL Over excitation Limiting Compensation CCCT Cross Current Ou Output Compensation Transformer Comp Compensation Ov Over Config Configuration PF Power Factor CT Current Transformer Ph Phase Dly Delay PMG Permanent Magnet Generator En Enable Pri Primary Ened Enabled PU Per Unit Err Erro Pwr Power Exc Excitation Rcvd Received FCR Field Current Regulator Redndt Redundant Flt Faul Resvd Reserved Freq Frequency Rev Reverse FS Full Scale Rot Rotation Gen Generator Sec Secondary Hi High Setpt Setpoint Hrs Hours Sync Synchronization Hz Hertz Td Derivative Time Constant Current UEL Under excitation Limiting nit Initial Undr Under k Kilo Unschd Unscheduled d Derivative gain V Voltage g Overall gain VA Volt Amps i Integral gain VAR Volt Amps Reactive p Proportional gain VT or PT Voltage Potential Transformer Lim Limit W Watt Assembly Object Properties The CIP Assembly Object Class 0x04 provides assembly instances attributes and services that facilitate data transfer between the CGCM unit and the ControlLogix controller Specific assembly object properties are listed with each data table below Rockwell Automation Publication 1407 UM001H EN P November 2014 133 Chapter 6 CGCM Unit Software Interface Input Data Table scheduled read The Input data table contains time critical status data read from the CGCM unit by the ControlLogix controller Data in this Controll
220. orts the voltage present at the load sharing terminals kW PU Load This tag reports the total p u kVA being produced by the active phases of the generator The base for this calculation is the configured generator kVA kW AnalogPU Load This tag reports the value of the voltage present at the load share terminals divided by the configured full scale voltage It represents the system per unit load KVAR LS InputV The product of the RMS magnitude of the reactive portion of the differential current flowing in the input CT and the generator terminal voltage is computed The product is divided by the rated kVA to determine the reported value for this tag KVAR PU Load This tag reports the total p u KVAR being produced by the active phases of the generator The base for this calculation is the configured generator kVA KVAR AnalogPU Load This tag reports the difference between the KVAR PU Loadand the kVAR LS input 232 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Detailed CGCM Unit Tag Descriptions Appendix E Metering This section describes the metering inputs and outputs for the CGCM unit Metering Inputs to the CGCM Unit Set kW Hrs When this tag is set to a 1 the KW Hrs counter is set to 0 in versions 2 x In host firmware revision 3 x and later the value of the tag kWHoursPreset is loaded into the counter Set KVAR Hrs When this tag is set to a 1 the kVAR Hrs counter is set to 0 in versions 2 x
221. ossExc Setpt Loss Excitation Current A 100 10 1500 66 Setpoint 218 2 INT A LossExc TimeDly Loss Excitation Current s 100 10 990 67 Delay 220 4 Real A UEL_Curve_W_Pt1 Under excitation Limiting W 0 1E 09 68 Curve Power Poin 224 4 Real A UEL_Curve_W_Pt2 Under excitation Limiting W 0 1E 09 69 Curve Power Point 2 228 4 Real A UEL_Curve_W_Pt3 Under excitation Limiting W 0 1E 09 70 Curve Power Point 3 232 4 Real N A UEL_Curve_W_Pt4 Under excitation Limiting W 0 1E 09 71 Curve Power Point 4 236 4 Real N A UEL_Curve_W_Pt5 Under excitation Limiting W 0 1E 09 72 Curve Point 5 240 4 Rea N A UEL Curve VAR P Under excitation Limiting VARs 0 1E 09 73 VAR Poin 244 4 Rea 0 7 UEL_Curve_VAR_P Under excitation Limiting VARs 0 1E 09 74 VAR Point 2 248 4 Rea 0 7 UEL_Curve_VAR_P Under excitation Limiting VARs 0 1E 09 75 VAR Point 3 252 4 Rea 0 7 UEL_Curve_VAR_P Under excitation Limiting VARs 0 1E 09 76 VAR Point 4 256 4 Rea 0 7 UEL_Curve_VAR_P Under excitation Limiting VARs 0 1E 09 71 VAR Point 5 260 4 Real 0 7 OEL_OnlineHiSetpt Over excitation Online High A 0 9999 78 Setpoint 150 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Software Interface Chapter 6 Table 18 Unscheduled Configuration Read Write Data Table Assembly Instance 4 Byte Size in Type Bits
222. ot ensure that data is appropriate for the application No data range checking is performed on configuration data that is modified by the user program Out of range configuration data is not accepted by the CGCM unit and a communication error results If you wish to monitor the content of the Unscheduled Read data type in the user program you must create a tag with data type AB 1407_CGCM Unscheduled_Read and create logic in the user program to initiate unscheduled read messages to the CGCM unit Configuration Messaging The CGCM unit is not configured when power is applied Before the CGCM unit can operate use the ControlLogix controller to configure the unit There are two parts to the module configuration and a two step process that transfers the configuration into the CGCM unit The follow are the two parts of the configuration data e Configuration data table The configuration parameters for the CGCM unit are stored in the controller in the Configuration Data Table on page 145 e Unscheduled Write data table Voltage regulator gain and voltage compensation parameters are stored in the Unscheduled Write Data Table on page 143 The controller automatically writes the Configuration data table to the CGCM unit The user program controls the write of the Unscheduled Write data The two step configuration process is described in the Connection Behavior during Configuration section on page 130 Rockwell Automation Publication
223. ovides information on communicating with the CGCM unit by using the ControlNet network It discusses scheduled and unscheduled messaging between the ControlLogix controller and the CGCM unit and touches briefly on the user program communication interface The Summary of Data Tables on page 128 provides an overview of the module defined Data Types that are created in the ControlLogix controller when a CGCM unit is created Other tables display the content and format of the Data Types in greater detail CGCM Unit Firmware Revision Considerations Controller tags are created when a CGCM unit is added to the ControlLogix controller project The module defined data type depends on the major firmware revision selected If you need to change the major firmware revision in the ControlLogix project you must delete the CGCM unit from the controller I O configuration and install it again with the correct firmware revision selected In revision 3 x and later the size of the Unscheduled Write data type was increased from 64 bytes to 76 bytes Use the lt CGCM gt C UnschWrite controller tag as the source tag for the unscheduled write with either firmware revision where lt CGCM gt is the name of the CGCM unit in the controller I O configuration The data in this tag is accessed by using the Gain and Voltage tabs in the module properties dialog box Set the length of the unscheduled write message to 64 bytes for firmware revision 2 x and 76 bytes for r
224. oy Somer 300 kW AREP auxiliary winding regulation excitation principle machine Details can differ on other machines AJBI CIN 22 o n mcme Current Z1 PMG A PMG B PMG C SHLD 1 SHLD 1 Aux Windings TBS 18 Rockwell Automation Publication 1407 UMO001H EN P November 2014 Installation Chapter 2 Excitation Output The excitation outputs are on TB2 and are labeled EXC and EXC Twisted shielded cabling is required for the excitation outputs Figure 7 Excitation Output Connections Non redundant CGCM Exciter voltage connections TB2 EXC Exciter field When the redundancy function is used three or four external flyback diodes in series must be placed across the generator field winding Refer to the redundancy wiring diagrams on pages 31 32 Control Power The 24V DC control power inputs are on TB4 and are labeled BAT and BAT Figure 8 Control Power and Chassis Ground Connections 24V DCControl Power Source Ground stud ty pical Rockwell Automation Publication 1407 UM001H EN P November 2014 19 Chapter 2 20 Installation Chassis Ground The terminal labeled CH GND on TB4 is the chassis ground Ground studs are also provided on the lower part of the mounting flanges and are internally connected to the CH GND terminal Connect chassis ground to earth ground with minimum 2 6 mm 10 AWG copper wire attached to either stud on the lower part of either sid
225. parameter expressed in degrees TIP The Bus A examples also apply to Bus B IMPORTANT Table 4 provides a guide for adjusting phase offset for wiring configurations shown in Chapter 2 Installation Other wiring configurations are possible It is your responsibility to determine and verify phase offset values for wiring configurations that are not depicted in this manual Rockwell Automation Publication 1407 UM001H EN P November 2014 97 Chapter4 CGCM Unit Configuration Table 4 Phase Offset Guide Generator Bus Phase Shift Offset in CGCM Synch Tab Single phase line to line Dual breaker line to neutral 30 Single phase line to line Four wire wye 30 Open delta Dual breaker line to neutral 30 Open delta Four wire wye 30 Three wire wye Dual breaker line to line 60 Three wire wye Dual breaker line to neutral 30 Three wire wye Four wire wye 30 Four wire wye Dual breaker line to line 30 Four wire wye Single connected line to line 30 Four wire wye Open delta 30 Four wire wye Three wire wye 30 98 Dead Bus Limits The dead bus limits define the acceptance windows for generator frequency and voltage used by the CGCM unit when closing the breaker into a dead bus The following Configuration tab fields specify the acceptance windows These fields set the related tags in the Configuration table e Min Frequency Tag DeadbusGenFreqLoLimit expressed in Hertz Max Frequ
226. points are tied together but are not connected internally to protective earth or SHLD3 other unit circuitry A COM Analog common EX D Excitation enable input EX D Excitation enable return LS Real power load sharing input LS Real power load sharing return SHLD4 Shield 4 landing point is not connected internally to protective earth or other unit circuitry 1 When used in a dual breaker configuration Bus A voltage input is wired from V Bus A to V Bus N and Bus B is wired from V Bus B to V Bus N 16 Rockwell Automation Publication 1407 UM001H EN P November 2014 Installation Chapter 2 Excitation Power Excitation power is wired to the PMG terminals whether connected to the generator output Shunt Excited or to a PMG Connect shunt excited inputs with a voltage transformer VT PMG inputs are on TB1 and are labeled PMG A PMG B and PMG C illustrating their respective phase relationships Single phase excitation power must be connected to terminals PMG A and PMG C Twisted shielded cabling is required for the PMG inputs Refer to the wiring diagrams below Figure 2 Excitation Power Connections 3 phase PMG Figure 4 Excitation Power Connections Single phase Shunt Rockwell Automation Publication 1407 UM001H EN P November 2014 17 Chapter2 Installation Figure 5 Excitation Power Connections 3 phase Shunt Figure 6 Excitation Power Connections AREP Generator TIP This diagram is based on a Ler
227. present only in the CGCM unit host firmware revision 3 x or later Configuration Data Table The Configuration data table contains configuration parameters which are automatically written to the CGCM unit by the ControlLogix controller when a connection is first established or when the user changes parameters in the RSLogix 5000 software module configuration dialog boxes and clicks the Apply or OK buttons The CGCM unit accepts only Configuration data if all parameters are within range and excitation is disabled Data Type The Configuration data table is automatically created by using module defined data type AB 1407 CGCM C 0 for firmware revision 2 x or AB 1407 CGCM C 1 for firmware revision 3 x This tag does not show the first four bytes of the data table Unscheduled reads and writes of the Configuration data table are supported If you wish to perform unscheduled reads or writes you must create a user defined data type and tags based on it that begins with a four byte pad for example a DINT element followed by the remaining tags in the AB 1407 CGCM C 0 or C 1 module defined data type You can do this in RSLogix 5000 software by highlighting the tags in the module defined data type definition choosing Copy from the Edit menu selecting the element after the pad in the user defined data type and choosing Paste from the Edit menu In host firmware revision 3 4 and later the configuration is also available by using assembly ins
228. put Enable Bool 7 OvrFreqFltQutEn Over frequency Fault Output Enable 5 1 Bool 0 Spare1 Bool 1 Loss_Exc_Flt_Out_En Loss Excitation Fault Output 0 Disabled Enable 1 Enabled Bool 2 OEL_En Over excitation Limiting Enable Bool 3 UEL_En Under excitation Limiting Enable Bool 4 LossSensingFltOutEn Loss Sensing Fault Output Enable Bool 5 LossPMGFItOutEn Loss Permanent Magnet Generator Fault Output Enable Bool 6 RotDiodeFltQutEn Rotating Diode Fault Output Enable Bool 7 PhRotFltQutEn Phase Rotation Fault Output Enable 6 1 Bool 0 BusRotABC_ACB_ Select Bus Rotation ABC ACB 0 ABC 1 ACB Select Bool 1 GenRotABC_ACB_ Select Generator Rotation 0 ABC 1 ACB ABC ACB Select Bool 2 Spare2 Bool 3 PMG_Shunt_Select PMG Shunt Select 0 PMG 1 Shunt Bool 4 Spare3 Bool 5 Spare4 Bool 6 Internal_Tracking_En Internal Tracking Enable 0 Disabled 1 Enabled Bool 7 PMG_1Ph_3PhSelect PMG Single Phase Three 0 1Ph 1 3Ph Phase Select Rockwell Automation Publication 1407 UM001H EN P November 2014 147 Chapter 6 CGCM Unit Software Interface Table 18 Unscheduled Configuration Read Write Data Table Assembly Instance 4 Byte Size in Type Bits Tag Name Description Units Range Error Code Bytes 7 1 Bool 0 7 Spareb 12 8 4 Real N A GenVT_Pri_V Generator Voltage V 30 0
229. r under frequency 207 over current protection 206 over excitation limiting off line 209 over excitation limiting on line 208 over excitation voltage protection 206 over voltage protection 206 parallel compensation 205 phase rotation check 208 physical characteristics 211 regulation 205 remote excitation enable input 204 reverse power 207 Reverse VAR 207 rotating diode monitor 207 soft start function 208 under excitation limiting 209 under voltage protection 206 voltage matching 208 spin the generator 117 startup 107 start up preparation 108 recommended equipment 108 start up procedures 109 initial checkout 109 operational test functions 116 power up 109 simulate AC gen and bus inputs 111 test protective functions 111 test redundancy operation 110 test synch 119 verify automatic operating modes 120 verify ControlNet connection 110 verify diode monitor 123 verify limiter functions 123 verify metered parameters 111 synch machine term voltage transducer model 189 synch tab 96 bus a offsets 97 bus b offsets 97 dead bus limits 98 limits 96 rotation 98 synchronizing 59 228 configurable parameters 61 connection schemes 60 control software interface 63 error calculation 62 initiating 61 inputs 228 outputs 230 synchronizing control software interface 63 synchronizing error calculation 62 T tag descriptions 213 terminal block descriptions 15 test protective functions 111 generator over current 116 generator over volt
230. r wye configurations of the CGCM unit This parameter is stored in tag GenVT Sec V in the configuration table 78 Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Configuration Chapter 4 Bus VT Configuration The bus VT configuration selections are 1 single phase 2 two transformer open delta 3 three wire wye 4 four wire wye and 5 dual breaker This parameter is stored in the tag BusVT Config in the configuration table For applications that require synchronizing to one of two busses dual breaker must be selected e Bus A VT Primary Voltage The primary voltage rating of the bus voltage transformer is stored in tag BusA VT Pri V in the configuration table Bus A VT Secondary Voltage The secondary voltage rating of the bus voltage transformer connected to V Bus A V Bus B and V Bus C and V Gen N for wye configurations of the CGCM unit This parameter is stored in tag BusA VT Sec Vin the configuration table e Bus B VT Primary Voltage The primary voltage rating of the second bus voltage transformer when dual breaker bus VT configuration is selected This parameter is stored in tag BusB VT Pri V in the configuration table Bus B VT Secondary Voltage The secondary voltage rating of the second bus voltage transformer connected to V Bus B and V Bus N of the CGCM unit This parameter is stored in tag BusB VT Sec Vin the configuration table The Bus B VT settings are used only by the CG
231. ral gains To activate PF mode the metering CTs and VTs must be properly connected and configured the PF mode gains must be set the desired power factor setpoint must be written to the PFSetpt tag e excitation enabled tag SoftwareExcEn 1 remote Excitation Enable On discrete input the CGCM unit must be in AVR mode tag AVR FCR Select 0 e droop must be enabled V DroopEn tag 1 e droop must be selected Droop CCC Select tag 0 e automatic reactive power control must be enabled tag PF VAR En 1 e power factor control must be selected tag PF VAR Select 0 Rockwell Automation Publication 1407 UM001H EN P November 2014 47 Chapter 3 48 CGCM Unit Operation Reactive Power Regulation Mode VAR In VAR mode the CGCM unit controls field excitation current output to maintain the commanded reactive power setpoint The CGCM unit uses the measured generator voltages and currents to calculate reactive power The VAR feedback loop includes adjustable proportional and integral gains To activate VAR mode the metering CTs and VTs must be properly connected and configured the VAR mode gains must be set e the desired reactive power setpoint must be written to the VARSetpt tag e excitation enabled tag SoftwareExcEn 1 remote Excitation Enable On discrete input the CGCM unit must be in AVR mode tag AVR_FCR_Select 0 e droop must be enabled V_DroopEn tag 1 e droop must be
232. ration a Phase Rotation Fault has no effect on the Fault Relay Rockwell Automation Publication 1407 UM001H EN P November 2014 221 Appendix E Detailed CGCM Unit Tag Descriptions Phase Rotation Check Outputs from the CGCM Unit PhRotFlt This tag is used to communicate the occurrence of a Phase Rotation Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Generator Over current Inputs to the CGCM Unit Ovr_I_FltOutEn When this tag is a 1 in the configuration and an Over current Fault occurs as defined by the Ovr_I_Setpt tag the Fault Relay is energized When this tag is a 0 in the configuration an Over current Condition has no effect on the Fault Relay Ovr_I_Setpt This tag configures the threshold that the CGCM unit uses to recognize when a generator over current condition exists When the condition occurs the CGCM unit starts timing toward a trip based on the selected over current curve and time dial Ovr_I_TimeDial This tag configures the tripping time in relationship to the magnitude of the actual current applied to the CGCM unit Ovr_I_Curve This tag configures the time over current characteristic curve that is used by the over current function of the CGCM unit Ovr_I_VrestSetpt This tag lets the timed over current characteristic to be modified based on the amount of generator vo
233. rator under voltage setpoint to the desired level Loss of Sensing 60FL Follow these steps to test that the Loss of Sensing function is working properly 1 Connect a suitable load to the excitation output terminals of the CGCM unit Enable excitation in FCR mode with an FCR setpoint greater than the loss of field current setpoint 3 Apply simulated generator voltage signals by using the test voltage source Adjust the AVR setpoint equal to the simulated generator average line to line voltage Switch the CGCM unit from FCR to AVR mode Reduce one or more generator VT sensing inputs to less than 30 of the AVR setpoint IMPORTANT During this step excitation output increases to the OEL limiting setpoint if configured or the maximum output Exercise caution so that no damage occurs to the CGCM exciter field or simulated load Verify that a generator loss of sensing alarm is annunciated following the expected delay Rockwell Automation Publication 1407 UM001H EN P November 2014 113 Chapter5 CGCM Unit Startup Loss of Permanent Magnet Generator PMG Excitation Power 27 This fault is enabled only when PMG excitation is selected and excitation is enabled If shunt excitation is selected skip these steps Follow these steps to test that the Loss of Permanent Magnet Generator function is working properly 1 Verify that PMG excitation is selected and that PMG phase select is correctly set
234. remely Inverse 12t 8 2506 0 00000 1 000 2 0469 0 028 8 0000 6 Long Time Inverse 12t 12 1212 0 00000 1 000 1 0000 0 028 29 0000 7 Fixed Time 0 0000 1 00000 1 000 0 0000 0 028 1 0000 Time Over current The following illustrations show the characteristic curves of the CGCM Equivalent time dial settings were calculated at a value of five times pickup Characteristic Curve Graphs The Characteristic Curve Cross Reference table cross references each curve to existing electromechanical relay characteristics 170 Rockwell Automation Publication 1407 UM001H EN P November 2014 Time Over current Characteristic Curves Appendix A Table 37 Characteristic Curve Cross Reference Curve Curve Name Page Similar To 1 S Short Inverse 173 ABB CO 2 2 S2 Short Inverse 174 GE IAC 55 3 L L1 Long Inverse 175 ABB CO 5 4 L2 Long Inverse 176 GE IAC 66 5 D Definite Time 171 ABB CO 6 6 M Moderately Inverse 178 ABB CO 7 7 11 Inverse Time 179 ABB C0 8 8 2 Inverse Time 180 GE IAC 51 9 V V1 Very Inverse 181 ABB CO 9 10 V2 Very Inverse 182 GE IAC 53 11 E E1 Extremely Inverse 183 ABB CO 11 2 E2 Extremely Inverse 184 GE IAC 77 13 A Standard Inverse 185 BS IEC Standard Inverse 4 B Very Inverse It 186 BS IEC Very Inverse It 15 Extremely Inverse It 187 BS IEC Extremely Inverse It 16 Long Time Inverse 188 BS IEC Long Time Inverse 17 Fixed Time N A N A Time Dial
235. rgized When this tag is a 0 in the configuration an Over voltage Condition has no effect on the Fault Relay e Rev KVAR Setpt This tag configures the generator reverse KVAR setpoint at which the CGCM unit recognizes a reverse KVAR loss of excitation condition is present and starts timing to trip based on the Reverse KVAR fault Delay setting Rev KVAR TimeDly This tag configures the time to shutdown annunciate once the generator reverse KVAR setpoint has been exceeded Reverse VAR Outputs from the CGCM Unit e RevVARFit This tag is used to communicate the occurrence of a Reverse VAR Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Definite Time Over frequency Inputs to the CGCM Unit e OvrFreqFltOutEn When this tag is a 1 in the configuration and an Over frequency Fault occurs as defined by the OvrFreqSetpt tag the Fault Relay is energized When this tag is a 0 in the configuration an Over frequency Condition has no effect on the Fault Relay e OvrFreqSetpt This tag configures the generator over frequency setpoint at which the CGCM unit recognizes an over frequency condition is present and starts timing to trip based on the Over frequency Time Delay e OvrFreqrimeDly This tag configures the time to shutdown annunciate once the generator Over frequency Setpoint has been exceeded
236. ritical command and setpoint data written to the CGCM unit by the ControlLogix controller Data in this Controller Tag is automatically written by the host controller to the unit at the scheduled update rate whenever a connection between the two exists This occurs independently of the user program The Output data table can also be read and written by using unscheduled messaging An unscheduled write message is not accepted if there is a scheduled connection active Data Type The Output data table is automatically created by using module defined data type AB 1407_CGCM 0O 0 Revision 2 x or AB 1407 CGCM 0 1 Revision 3 x or 4 x Assembly Object Instance 1 Output Data Table scheduled write The Get Attributes Single service for instance 1 of the Assembly Object can access the following information Table 8 Get Attributes Single service code 0x0E Attribute ID Data Type 3 UINT See Output scheduled write Data Table Assembly Instance 1 Size 4 UINT 56 The Set Attributes Single service for instance 1 of the Assembly Object can access the following information Rockwell Automation Publication 1407 UM001H EN P November 2014 137 Chapter6 CGCM Unit Software Interface Table 9 Set Attributes Single service code 0x10 Name Attribute ID Data Type Value Data UINT See Output scheduled write Data Table Assembly Instance 1 TIP Set Attribute Single is supported for this instance only when there is
237. rivative Gain 16 4 Real AVR_FCR_Td Automatic Voltage Regulator Field Current 0 1000 5 Regulator Derivative Time Constant 20 4 Real AVR_Kg Automatic Voltage Regulator Overall Gain 0 1000 6 24 4 Real FOR Kg Field Current Regulator Overall Gain 0 1000 7 28 4 Real PF Kg Power Factor Overall Gain 0 1000 8 32 4 Real PF Ki Power Factor Integral Gain 0 1000 9 36 4 Real VAR Kg VAR Overall Gain 0 1000 10 40 4 Real VAR Ki VAR Integral Gain 0 1000 11 44 4 Real QEL Kg Over excitation Limiting Overall Gain 0 1000 12 48 4 Real OEL_Ki Over excitation Limiting Integral Gain 0 1000 13 52 4 Real UEL_Kg Under excitation Limiting Overall Gain 0 1000 14 56 4 Real UEL_Ki Under excitation Limiting Integral Gain 0 1000 15 60 4 Real V Match Gain Voltage Match Gain 0 1000 16 144 Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Software Interface Chapter 6 Table 15 Unscheduled Write Data Table Assembly Instance 6 Byte Size in Type Tag Name Description Units Range Error Bytes Code 64 4 Real kWHoursPreset kW Hours Preset 1x10 2 1x10 4 17 68 4 Real kVARHoursPreset kVAR Hours Preset 1x10 2 1x10 2 18 72 4 Real kVAHoursPreset kVA Hours Preset 0 1x1012 19 Message size depends on the unit s firmware revision 64 FRN 2 x or 76 FRN 3 x or later byte Message size from CNET to CGCM Written to the CGCM unit TIP The last three elements are
238. rse 99 1377 5 6 7 891 2 3 4 5 678910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 gt e uayoevo N SECONDS TIME wu oN oL ES t m gt r U o a O gt NAAFUONWOO Wo 000000000 02 01 5 6 7 8 91 2 3 4 5 6 7 8910 20 30 40 50 60 D1090 05 MULTIPLES OF PICK UP Rockwell Automation Publication 1407 UM001H EN P November 2014 187 Appendix Time Over current Characteristic Curves Figure 58 Time Characteristic Curve G Long Time Inverse 99 1622 0 50 6 0 8 1 0 2 3 4 5 678910 20 30 40 50 60 1000 900 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 T 19 E nm 8 D QO 7 Zz 6 s A O L fi 4 v 9 9 3 9 0 Z 8 0 ii 7 0 gt 6 0 F 5 0 4 0 3 0
239. s Static Tests of Protective Functions These tests can be performed to verify the applicable protective functions of the CGCM unit These tests can require the use of the test current and voltage source Some tests can require a load on the CGCM unit exciter output This load can be either the generator exciter field or a simulated load Loss of Excitation Current 40 Follow these steps to test that the Loss of Excitation current function is working properly 1 Connect a suitable load to the excitation output terminals of the CGCM unit Set the loss of field current setpoint to a level that causes an alarm Enable excitation in FCR mode with an FCR setpoint less than the loss of field current setpoint Verify that a field loss alarm is annunciated following the expected delay by viewing the appropriate controller tag Reset the loss of field setpoint to the desired level Rockwell Automation Publication 1407 UM001H EN P November 2014 111 Chapter5 CGCM Unit Startup Over excitation Voltage 59F Follow these steps to test that the Over excitation voltage function is working properly 1 Connect a suitable load to the excitation output terminals of the CGCM unit 2 Decrease the field over excitation voltage setpoint to a level that causes an alarm 3 Enable excitation in FCR mode with an FCR setpoint that produces a field voltage higher than the over excitation voltage setpoint 4 Verify th
240. s or other compatible generator control devices such as the Line Synchronization Module catalog number 1402 LSM to load the generators under their control such that the same per unit output is developed by each generator Load sharing terminals are labeled LS and LS Rockwell Automation Publication 1407 UM001H EN P November 2014 41 Chapter3 CGCM Unit Operation Communication 42 Discrete Outputs The CGCM unit provides two discrete open collector outputs the fault output and the redundancy relay output These are sinking type outputs internally connected to the control power BAT supply They are intended to drive a user supplied relay connected between the control power BAT supply and the applicable discrete output terminal Fault Output The fault output can be used to annunciate a fault via a user supplied relay The user chooses from a predetermined list the conditions for this output The fault output is labeled FLT The fault enable output tags in the Output table determine which faults activate the fault relay output Redundancy Relay Output The redundancy relay output is used to transfer excitation of the generator from the primary CGCM unit to the redundant CGCM unit in dual unit systems The redundancy relay output is labeled RD RLY The CGCM unit provides three communication ports along with software inputs and outputs Com 0 Factory Test Port Not for customer use This port is used to ca
241. s the Bus frequency e V_AdjustOffset This tag reports the voltage on the VREF terminals of the CGCM unit e BusV_Present This tag indicates if there is voltage present on the reference bus e GenV_Present This tag indicates if generator voltage is being developed e FreqLessThan10Hz This tag indicates that the generator frequency is less than 10 Hz Redundancy This section describes the redundancy inputs and outputs for the CGCM unit Redundancy Inputs to the CGCM Unit e RedndtTrackRate This tag configures the rate at which the Tracking mode of the redundant CGCM units matches the primary CGCM unit s active excitation control mode e RedndtTrackDly This tag changes the initial delay of the tracking function of the redundant CGCM unit to prevent the Tracking mode from adjusting the non active modes into an undesirable condition For example while the unit is operating in AVR mode the sensing VT fails to open If the redundant CGCM unit Tracking mode were allowed to instantly track the full on condition created by the loss of sensing the transfer to the redundant CGCM unit in an undesirably high generator voltage Adding a tracking delay enables the unit to transfer to a redundant CGCM unit without letting the redundant CGCM unit follow into a potentially undesirable operating point Rockwell Automation Publication 1407 UM001H EN P November 2014 235 Appendix E Detailed CGCM Unit Tag Descriptions Redundancy Outp
242. se Error 1 1 1 1 1 Sync Frequency Error 1 1 1 1 1 Bus Voltages 3 L L CA AB BC CA AB BC CA AB BC CA N A Bus Voltage avg L L Yes CA Yes Yes Yes Yes Bus Voltages 3 L N N A N A N A A B C N A Bus Voltage avg L N N A N A N A Yes N A Bus A Frequency Yes Yes Yes Yes Yes Bus B Frequency N A N A N A N A Yes Gen Phase Rotation N A Yes Yes Yes Yes Bus Phase Rotation N A Yes Yes Yes N A 1 Results updated only while Synchronization is active tag InitiateSync 1 Rockwell Automation Publication 1407 UM001H EN P November 2014 65 Chapter3 CGCM Unit Operation Figure 36 Power System Sign Conventions Forward Reactive Power Flow export A ll watts negative watts positive vars positive vars positive power factor lagging power factor lagging Reverse Real Power Flow Ie Forward Real Power Flow import 66 export watts negative watts positive vars negative vars negative power factor leading power factor leading Hl IV Vv Reverse Reactive Power Flow import Redundancy The CGCM unit is capable of being used in a Redundant mode that provides automatic transfer of control to a second CGCM unit In a redundant configuration the host Logix programmable controller is primarily responsible for sensing power system conditions that require a transfer of control The CGCM unit also can initiate a transfer of control in
243. signal changes the setpoint of the selected operating mode by one percent of the applicable rated value for each volt applied positive or negative multiplied by the auxiliary gain setting for AVR FCR or VAR PF Refer to Chapter 4 for more information Auxiliary input gain settings range from 99 99 If the gains are set to zero the auxiliary input is inactive A typical use for this input is with a Power System Stabilizer where adjusting the regulation point of the generator can increase system stability during power system kW swings Line drop Compensation Line drop compensation adjusts generator voltage proportional to generator load Line drop compensation can be used to maintain voltage at a load that is at a distance from the generator Generator output reactive current is used to increase the generator voltage with increasing load based on the user configurable line drop compensation factor Line drop compensation is adjustable from 0 10 of the voltage setpoint in 0 1 steps which represents the percent voltage change at rated generator current Line drop compensation cannot be used with droop or cross current compensation Power Factor Regulation Mode PF In PF mode the CGCM unit controls field excitation current output to maintain the commanded power factor setpoint The CGCM unit uses the measured generator voltages and currents to calculate power factor The PF feedback loop includes adjustable proportional and integ
244. similar type Cross current compensation monitors the ID current V GEN A and V GEN C inputs to adjust the excitation level A gain adjustment is provided to allow tuning of the cross current control Cross current compensation is configured and controlled by using the software interface to the Logix controller To activate cross current compensation e the generators must be connected in parallel the cross current CT and generator VTs must be properly connected the desired cross current gain must be written to the CrossCurrentGain tag e excitation enabled tag SoftwareExcEn 1 remote Excitation Enable On discrete input e the CGCM unit must be in AVR mode tag AVR_FCR Select 0 e droop must be enabled V_DroopEn tag 1 e cross current compensation must be selected Droop_CCC_Select tag 1 and KVAR LS En tag 1 for firmware rev 2 x When cross current compensation is disabled or control power is removed from the unit the cross current input terminals ID and ID are internally connected together through a very small impedance 1 For series B devices the input terminals are not connected together when control power is removed Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 Auxiliary Input Regulation Adjustment The auxiliary input provides a means to remotely adjust the regulation point of the generator This analog voltage 10 10V DC input
245. t e LossSensingFltOutEn When this tag is a I in the configuration and a Loss of Sensing Fault occurs the Fault Relay is energized When this tag is a 0 in the configuration a Loss of Sensing Condition has no effect on the Fault Relay Loss of Sensing Outputs from the CGCM Unit e LossSensingFlt This tag is used to communicate the occurrence of a Loss of Sensing Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag 224 Rockwell Automation Publication 1407 UM001H EN P November 2014 Detailed CGCM Unit Tag Descriptions Appendix E Loss of Operating Power Inputs to the CGCM Unit e LossPMGFltOutEn When this tag isa 1 in the configuration and a Loss of PMG Fault occurs the Fault Relay is energized When this tag is a 0 in the configuration a Loss of PMG Condition has no effect on the Fault Relay Loss of Operating Power Outputs from the CGCM Unit e LossPMGFlt This tag is used to communicate the occurrence of a Loss of PMG Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Reverse VAR Inputs to the CGCM Unit e RevVARFltOutEn When this tag isa 1 in the configuration and a Reverse VAR Fault occurs as defined by the Rev_kVAR Setpt tag the Fault Relay is ene
246. t of rated generator current Over current Curve Selects the time over current characteristic curve that are used by the over current function of the CGCM unit Tag Ovr_I_Curve stores this parameter Over current Time Dial Selects a particular curve from the family of curves contained in the selected over current characteristic curve Tag Ovr_I_TimeDial stores this parameter Over current Voltage Restraint Setpoint This setting establishes the generator voltage threshold below which the CGCM unit automatically reduces the selected time over current setpoint Tag Ovr I VrestSetpt stores this value expressed as a percent of rated generator voltage The over current setpoint is reduced to the same percentage as the voltage restraint threshold Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 e Validate and graph button Updates the graph shown on the Current tab to display the selected over current characteristic curve The specific curve selected by the over current time dial setting is displayed in black Related Parameters e GenRated I e GenRated V Frequency Tab The Frequency tab is used to configure the CGCM unit parameters related to the over frequency and under frequency protection functions a 1 Module Properties Report CNBR 1407 CGCM 4 1 x General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking L
247. t which the system changes to the new setpoint when the mode changes At the instant the mode is changed the regulator begins changing its operating point from the internal tracking setpoint to the new mode s setpoint at a rate determined by the new mode s traverse rate Please refer to Chapter 4 for information on scaling and units of the traverse rate settings Increasing a traverse rate causes the regulator output to change more slowly A value of 200 seconds is a special case that causes the CGCM unit to hold the existing regulator output until the new setpoint is adjusted to become equal to or pass through the previous mode s setpoint Rockwell Automation Publication 1407 UM001H EN P November 2014 49 Chapter 3 CGCM Unit Operation 50 The tag SetptTraverseActive 1 when the CGCM unit is traversing between the internal tracking setpoint and the new operating mode s setpoint The tag 0 when the operating point has completed traversing to the new mode s setpoint This tag is used by the host Logix controller to determine when the new mode has taken control Limiting Functions This section discusses the different types of limiting functions the CGCM unit provides e Volts Hertz Limit e Over excitation Limit e Under excitation Limit Generator Capability Curve The generator capability curve graphically depicts the combinations of real and reactive power a generator is able to produce or absorb in the case of reactive
248. tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Reverse Power Protection Inputs to the CGCM Unit e RevPwrFltOutEn When this tag is a I in the configuration and a Reverse Power Fault occurs as defined by the Rev kW Setpt tag the Fault Relay is energized When this tag is a 0 in the configuration a Reverse Power Condition has no effect on the Fault Relay Rev kW Setpt This tag configures the generator reverse kW setpoint at which the CGCM unit recognizes a reverse power condition is present and starts timing to trip based on the Reverse kW fault Delay setting Rev_kW_TimeDly This tag configures the time to shutdown annunciate once the generator reverse kW setpoint has been exceeded 226 Rockwell Automation Publication 1407 UM001H EN P November 2014 Detailed CGCM Unit Tag Descriptions Appendix E Reverse Power Protection Outputs from the CGCM Unit e RevPwrFlt This tag is used to communicate the occurrence of a Reverse Power Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Rotating Diode Monitor Inputs to the CGCM Unit e RotDiodeFltOutEn When this tag is a 1 in the configuration and a Shorted or Open Rotating Diode Fault occurs the Fault Relay is energized When this tag is a 0 in the co
249. tal considerations 13 requirements 13 0 OEL tab 84 operation 37 operational functions 43 excitation control modes 44 limiting 50 metering 64 protection 54 real power load sharing 63 redundancy 66 synchronizing 59 watchdog timer 69 operational test functions 116 apply verify PMG power 117 spin the generator 117 verify adjust AVR mode 118 verify adjust FCR operation 117 verify metered voltages 118 verify phase rotation 118 verify redundancy operation 119 outputs 11 over excitation limit 52 inputs 220 outputs 220 over excitation voltage 55 inputs 223 outputs 223 Index over frequency 58 P phase rotation check 227 228 inputs 227 outputs 228 phase rotation fault 59 power factor mode 217 inputs 217 outputs 217 power factor regulation mode 47 power inputs 40 control power 40 excitation power 40 power tab 104 power up 24V DC 109 preparation 71 equipment required 72 record system parameters 72 protection 166 222 definite time over frequency 225 definite time overfrequency 226 definite time under frequency 226 general 222 generator over current 228 generator over voltage 223 224 generator under voltage 224 loss of excitation 222 223 loss of operating power 225 loss of sensing 224 over excitation voltage 223 phase rotation check 227 228 reverse power 226 227 reverse VAR 225 rotating diode monitor 227 protection functions 10 54 generator over current 59 generator over voltage 55 generator under voltage 5
250. tance 7 Instance 7 does not require the four byte pad described above Rockwell Automation Publication 1407 UM001H EN P November 2014 145 Chapter 6 146 CGCM Unit Software Interface IMPORTANT Writing the CGCM unit s configuration with unscheduled messaging is not recommended We recommend using only scheduled configuration messaging sent when the connection is opened or the module configuration is edited in RSLogix 5000 software Assembly Object Instance 4 Configuration Data Table The Get Attributes Single service for instance 4 of the Assembly Object can access the following information Table 16 Get Attributes Single service code 0x0E Attribute ID Data Type 3 UINT See Unscheduled Configuration Read Write Data Table Assembly Instance 4 Size 4 UINT 344 The Set Attributes Single service for instance 6 of the Assembly Object can access the following information Table 17 Set Attributes Single service code 0x10 Name Attribute ID Data Type Value Data 3 UINT See Unscheduled Configuration Read Write Data Table Assembly Instance 4 IMPORTANT Use of this service is not recommended See the note above Configuration Checking When configuration data is received the CGCM unit verifies that individual parameters are within the minimum and maximum values indicated in the table below for example perform range checking If an out of range parameter is detected the CGCM
251. tance in entering the correct primary and secondary voltages a Module Properties Report CNBR 1407 CG6CM 4 1 x Voltage Current Frequency Power UEL OEL Fault Relay Generator VT Configuration Primary Voltage Secondary Voltage Bus VT Configuration Bus AYT Primary Voltage Bus BYT Primary Voltage Status Offline General Connection Module Info Generator Secondary Voltage Secondary Voltage Transformers Excitation Volts Hz Gain Tracking Load Share Synch Generator CT Three Wire Wye mij Primary Current 500 0 Amps 480 0 Volts Secondary Current 5 0 Amps 120 0 Volts Cross Current CT Three Wire Wye ad Primary Current 500 0 Amps Secondary Current 5 0 Amps 480 0 Volts 120 0 Volts 480 0 Volts 120 0 Volts Cancel App Generator VT Configuration The generator VT configuration selections are 1 single phase 2 two transformer open delta 3 three wire wye and 4 four wire wye Use the two transformer open delta setting for any delta configuration This parameter is stored in the tag GenVT Config in the configuration table Generator VT Primary Voltage The primary voltage rating of the generator voltage transformer is stored in tag GenVT Pri Vin the configuration table Generator VT Secondary Voltage The secondary voltage rating of the generator voltage transformer connected to V Gen A V Gen B and V Gen C and V Gen N fo
252. tatus data read from the CGCM unit by the ControlLogix controller Data in this Controller Tag is read by the host controller from the unit by using unscheduled messaging controlled by the user program Data Type The Unscheduled Read data table must be created by the user by using module defined data type AB 1407 CGCM Unschduled Read Revision 2 x or AB 1407 CGCM Unscheduled Read3 Revision 3 x or 4 x 140 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Software Interface Chapter 6 Unscheduled Read Data Table The Get Attributes Single service for instance 5 of the Assembly Object can access the following information Table 11 Get Attributes Single service code 0x0E Attribute ID Data Type Data 3 UINT See Unscheduled Read Data Table Assembly Instance 5 Size 4 UINT 172 The Set Attributes Single service is not supported for instance 5 Configuration Checking No range checking is performed on this data table Energy Metering Considerations Energy metering values KW Hrs kVAR Hrs and kVA Hrs are provided using a REAL data type Values are expressed in a 32 bit floating point format with a precision of 7 digits The table lists the theoretical range of a REAL value The energy values accumulate when the average generator line current is no less than 1 of generator rated current The limit that can be represented by an energy tag is expressed by the following formulas KVA Hrs Limit
253. ted by SyncFailure tag e PermissiveSyncEn This tag is used to configure the CGCM unit to perform Permissive Synchronization This is one of three synchronization modes each selected by their respective tag Only one can be active 1 or the SyncModeConflict tag is activated and the synchronization fails indicated by SyncFailure tag e InitiateSync Setting this tag causes the CGCM unit to begin a synchronization sequence This bit must stay set throughout the synchronization or the sequence is terminated e SyncFreqHiLim This tag sets the upper limit frequency in Hz that is considered acceptable for a synchronization of two busses e SyncFreqLoLim This tag sets the lower limit frequency in Hz hat is considered acceptable for a synchronization of two busses e SyncV_HiLim This tag sets the upper limit voltage in percentage that is considered acceptable for a synchronization of two busses e SyncV_LoLim This tag sets the lower limit voltage in percentage that is considered acceptable for a synchronization of two busses e SyncPhHiLim This tag sets the upper limit phase in degrees that is considered acceptable for a synchronization of two busses e SyncPhLoLim This tag sets the lower limit phase in degrees that is considered acceptable for a synchronization of two busses e SyncAcceptDly This tag configures the time delay that is required to allow for breaker closing This setting is based on the time the
254. the following information Table 41 Get Attributes All service code 0x01 Name Attr ID Data Type Value Vendor Id 1 UINT 1 AB Device Type 2 UINT 115 or 0x73 Rockwell Automation Misc Product Code 3 UINT 59 or 0x03B Revision 4 USINT 2 Major Minor example 4 25 Status 5 WORD See Table 41 Device Status Serial Number 6 UDINT Unique device serial number factory assigned Product Name 7 CHARI CGCM Host Series C and earlier units 1407 CGCM Series D units Rockwell Automation Publication 1407 UM001H EN P November 2014 Additional ControlNet Network Information Identity Object Instance 2 communication module device instance Instance 2 of the Identity Object represents the ControlNet communication Appendix C module Series D units or daughter card DC in Series C and earlier CGCM units The Get Attributes All service for instance 2 of the Identity Object returns the following information Table 42 Get Attributes All service code 0x01 Name Attr ID Data Type Value Vendor Id 1 UINT 1 AB Series C and earlier 90 or Ox5A HMS Industrial Networks Series D Device Type 2 UINT 12 or OxOC Rockwell Automation Misc 43 or 0x2B Generic Device keyable Product Code 3 UINT 55 or 0x37 Revision Major Minor 4 USINT 2 Major Minor example 1 11 Status 5 WORD See Table 41 Device Status Serial Number 6 UDINT Unique device serial number Pr
255. the scanner in idle state Red Unrecoverable faults EXCEPTION or Fatal event Flashing Red 1 Hz Redundancy Most Likely Cause Serial cable not properly connected Diagnostic Action Disable excitation to one CGCM unit Recoverable faults MAC ID has been changed after initialization Corrective Action If excitation turns off as commanded one remaining CGCM operating repair replace cable If both CGCM units continues to excite replace CGCM units Connect personal computer by using hyperterminal or similar application o verify communication output from CGCM unit redundancy comm port If communication exists see above If no communication output exists replace CGCM unit One or both CGCM units will not operate as primary Faulty wiring Measure excitation enable input to CGCM unit that will not act as primary Verify voltage is applied to excitation enable input terminal Check operation of external relay and associated wiring for redundancy relay and output Correct excitation redundancy relay operation Check wiring of excitation output from CGCM unit Correct excitation output wiring Logix controller error Check output to excitation enable input hardware and software Correct logic as required Check logic to redundancy relay if applicable Correct logic as required One CGCM unit has failed or is not configured properly Troubles
256. ting changes the rate at which the internal tracking function matches the non active excitation control modes to the active excitation control mode This sets the value of the InternalTrackRate tag in the Configuration table expressed in seconds Internal Tracking Delay This setting adjusts the delay in the internal tracking function This sets the value of the InternalTrackDelay tag in the Configuration table expressed in seconds Its purpose is to reduce the likelihood that the short term response of the active regulating mode to an upset is transferred to a new mode of operation when the mode is switched If the internal tracking delay is too short the transient response to an upset is transferred to the new operating mode Conversely if the tracking delay is set too long there is a risk of an old operating point being transferred to the new operating mode resulting in an undesirable bump Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 An example of how these parameters affect tracking is shown in the Internal Tracking graph In this example a loss of sensing causes a full scale regulator output The internal tracking delay permits FCR mode to begin operation at the output level prior to the loss of sensing Figure 39 Internal Tracking lt Internal Tracking Delay AVR Setpoint Regulator Output Internal Tracking Setpoint Regulator Output FCR
257. tings as follows Rc 0 Resistive load compensation not available Xc 1 1 DRP 100 Tr 5ms where DRP is the percent droop programmed into the CGCM unit values range from 30 30 Rockwell Automation Publication 1407 UM001H EN P November 2014 189 AppendixB CGCM Unit Math Models Voltage Regulator The Per unit Block Diagram for Rotating Rectifier Excitation System shows the model of the CGCM excitation system used with a brush type rotating exciter The rotating exciter parameters are not included in this discussion because they are the responsibility of the exciter manufacturer Vp is the input from the power source for the excitation system A typical value for T4 is 0 The forcing limit Vp yz is related to the power input voltage Vp to the CGCM and the exciter field voltage Vp as follows The gain Kg is used for compensating variations in system configuration such as power input voltage The per unit base of the parameters Vp and Vp is the nominal exciter field voltage at no load The PID gains Kp Ky and Kp are custom designed for the best performance for each generator exciter system These continuous time gains are changed to discrete and implemented in the CGCM digital controller The PID gains can be obtained from the PID Calculator software available from Rockwell Automation Figure 60 Per unit Block Diagram for Rotating Rectifier Excitation System 190 Rockwell Automation Publica
258. tion Level 14 Core F Cyberport 3 100 Cyberport Road Hong Kong Tel 852 2887 4788 Fax 852 2508 1846 Publication 1407 UM001H EN P November 2014 Supersedes Publication 1407 UM001G EN P April 2013 Copyright 2014 Rockwell Automation Inc All rights reserved Printed in the U S A
259. tion 1407 UM001H EN P November 2014 CGCM Unit Math Models Appendix B VAR Power Factor The VAR PF controller is a summing point type controller and makes up the Controll er outside loop of a two loop system This controller is implemented as a slow PI type controller The voltage regulator forms the inner loop and is implemented as a fast PID controller The model of the CGCM VAR and power factor controller is shown in Per unit Block Diagram for Var Controller and Per unit Block Diagram for PF Controller respectively Non windup limit Vormr is used for bounding the VAR PF controller output voltages Vg and Vpp Figure 61 Per unit Block Diagram for Var Controller 0 0023 Ko To PID Controller VermT Figure 62 Per unit Block Diagram for PF Controller REF PF 0 00013 Ko To PID Controller PF c Vemr Limiters Both the over excitation limiter OEL and the under excitation limiter UEL in this implementation are of the summed limiter type as opposed to takeover type Per unit Block Diagram for Under excitation Limiter shows the model of the CGCM under excitation limiter The UEL makes up the outer loop and the voltage regulator makes up the inner loop The UEL uses a PI type controller Rockwell Automation Publication 1407 UM001H EN P November 2014 191 Appendix B 192 CGCM Unit Math Models The operating characteristics are designed to mimic the characteristics of the limiter on the
260. tion is working properly 1 Apply simulated generator voltage and current signals by using the test current and voltage source Adjust the simulated generator voltage to rated generator voltage Adjust the current above the desired test trip time point on the selected over current curve Verify that a generator over current alarm is annunciated following the expected delay The delay is a function of the curve time dial selections voltage restraint settings and the simulated generator current and voltage applied Repeat as desired to verify various points on the characteristic curve selected Reconnect All Permanent Connections Following all static testing reconnect all permanent connections that were temporarily removed These connections can include VT and CT input connections excitation power and exciter field connections Refer to the system installation and wiring documentation Operational Testing of the CGCM Unit s Functions These tests can be performed to verify the applicable operational functions of the CGCM unit These tests are performed with the generator and prime mover fully functional These steps are assumed to be performed in order so that the conditions at the end of one step exist at the beginning of the next step 116 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Startup Chapter 5 During the following tests the response of the AVR or FCR modes of operation c
261. tion voltage setpoint that the CGCM unit uses to recognize when an over excitation condition is present When the condition occurs the CGCM unit starts timing toward a trip based on the Over excitation Time Delay e OvrExcV_TimeDly This tag configures the time to trip the unit once the over excitation voltage setpoint has been exceeded Over excitation Voltage Outputs from the CGCM Unit e OvrExcFlt This tag is used to communicate the occurrence of an Over excitation Fault to the host Logix controller When this tag is a 1 it indicates that a fault has occurred The tag is latched until the host Logix controller resets it by setting the FltReset tag Generator Over voltage Inputs to the CGCM Unit e Ovr_V_FltOutEn When this tag is a I in the configuration and an Over voltage Fault occurs as defined by the Ovr_V_Setpt tag the Fault Relay is energized When this tag is a 0 in the configuration an Over voltage Condition has no effect on the Fault Relay e Ovr_V_Setpt This tag configures the generator over voltage setpoint that the CGCM unit recognizes an over voltage condition is present and starts timing to trip based on the Over voltage Time Delay e Ovr_V_TimeDly This tag configures the time to shutdown the unit once the generator Over voltage Setpoint has been exceeded Rockwell Automation Publication 1407 UM001H EN P November 2014 223 Appendix E Detailed CGCM Unit Tag Descriptions Generator Over voltage Outputs
262. to single or 3 phase Connect a suitable load to the excitation output terminals of the CGCM unit Enable excitation in FCR mode with an FCR setpoint greater than the loss of field current setpoint Remove one or more generator PMG supply leads to the CGCM unit Verify that a generator loss of PMG alarm is annunciated following the expected delay Reverse VAR 400 Follow these steps to test that the Reverse VAR function is working properly 1 Apply simulated generator voltage and current signals by using the test current and voltage source 2 Adjust the simulated reactive power until it exceeds the reverse VAR setting in the negative direction 3 Verify that a generator reverse VAR alarm is annunciated following the expected delay Over frequency 810 Follow these steps to test that the Over frequency function is working properly 1 2 Apply simulated generator voltage signals by using the test voltage source Adjust the simulated generator voltage frequency until it exceeds the over frequency setpoint Verify that a generator over frequency alarm is annunciated following the expected delay 114 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Startup Chapter 5 Under frequency 810 Follow these steps to test that the Under frequency function is working properly 1 AW ob WwW N Connect a suitable load to the excitation output terminals of the CGCM unit
263. troubleshooting above Then observe kVA indicated If kVA and voltage are correct see CT wiring troubleshooting See Voltage troubleshooting above kVAR does not read correctly CT Wiring error See Current troubleshooting above Observe KVA indicated If kVA and voltage is correct verify CT phase rotation See Current troubleshooting above VT wiring error See Voltage troubleshooting above Then observe kVA indicated If kVA and voltage are correct see CT wiring troubleshooting Rockwell Automation Publication 1407 UM001H EN P November 2014 See Voltage troubleshooting above 163 Chapter 7 164 Troubleshooting Communication The ControlNet Network Status indicators indicate the state of the ControlNet network connected to the BNC connectors If more than one state is present the status indicators always reflect the highest priority status present on the network The following tables describe the status indicator states and the priority of each status indicator Table 31 ControlNet A and ControlNet B Status Series C and earlier units Status Indicator Priority How to View Cause State Both steady off 1 highest View together Reset or no power Both steady red 2 Failed to link interface to ControlNet network Alternating red and 3 Self testing green Alternating red 4 Bad node configuration such as duplicate ControlNet network a
264. ts the kW being produced by Generator Phase B PhC kW This tag reports the kW being produced by Generator Phase C Rockwell Automation Publication 1407 UM001H EN P November 2014 233 Appendix E 234 Detailed CGCM Unit Tag Descriptions Total KVAR This tag reports the Total kVARs being produced by the active phases of the generator PhA KVAR This tag reports the kVARs being produced by Generator Phase A PhB KVAR This tag reports the kVARs being produced by Generator Phase B PhC KVAR This tag reports the kVARs being produced by Generator Phase C Avg I This tag reports the Average Current of the active phases of the generator PhA_I This tag reports the current in Generator Phase A PhB_I This tag reports the current in Generator Phase B PhC_I This tag reports the current in Generator Phase C AvgLLGenV This tag reports the Average Line to Line Voltage of the active phases of the generator PhAB_GenV This tag reports the Line to Line Voltage between Generator Phases A and B PhBC_GenV This tag reports the Line to Line Voltage between Generator Phases B and C PhCA_GenV This tag reports the Line to Line Voltage between Generator Phases C and A AvgLN_GenV This tag reports the Average Line to Neutral Voltage of the active phases of the generator PhA_GenV This tag reports the Voltage from Generator Phase A to Neutral PhB_GenV This tag reports the Voltage from Generator Phase B to N
265. u RSLogix 5000 software performs configuration data checking as specified by the limits shown in the data tables The data checking verifies that the entry is within range for the device however it does not verify that it is reasonable for the application You must be sure that the entry is reasonable for the specific application If you enter an out of range parameter in a Configuration tab a message box reports the error and the appropriate limits Refer to Chapter 6 for information on the limits specified by the data tables WARNING Data limit checking does not ensure values are appropriate for the application Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Configuration Chapter 4 Generator Tab The Generator tab is used to configure the unit to the design ratings of the generator Enter the generator s nameplate ratings in the appropriate fields of the Generator tab E Module Properties Report CNBR 1407 CGCM 4 1 Ba Voltage Current i Frequency Power UEL OEL Fault Relay General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking Load Share Synch Rated Frequency 60 Y Hz Voltage 480 0 Volts Current 100 0 Amps Power 300000 0 Watts Field Voltage 75 0 Volts Field Current 3 0 Amps Rated Frequency Sets the generator s rated frequency in Hz Sets the value of tag GenRatedFreq in the Config
266. ue correct VT wiring If voltage indicated does not correspond to measured voltage see configuration errors If configuration is correct replace CGCM unit Rockwell Automation Publication 1407 UMO001H EN P November 2014 Table 30 Metering Symptom Current does not read correctly Most Likely Cause Configuration errors Diagnostic Action Observe CT configuration parameters and to verify they reflect desired expected CT ratios Troubleshooting Chapter 7 Corrective Action Correct configuration to match expected CT wiring Wiring errors Observe each phase and average current indication Each phase current indicated is approximately equal and the average represents the average of the three If all low or high indicate ratio error if one or two are low or high indicate polarity grounding or disconnection Correct phase rotation polarity or grounding as applicable Confirm the correct CT inputs are used Measure signal at CGCM unit terminals If current indicated corresponds to measured value correct CT wiring If current indicated does not correspond to measured current see configuration errors If configuration is correct replace CGCM unit KW does not read correctly CT Wiring error See Current troubleshooting above Observe kVA indicated If kVA and voltage are correct verify CT phase rotation See Current troubleshooting above VT wiring error See Voltage
267. uit your application needs and click Finish TIP Alternately you can click Next to begin configuring the CGCM unit at this point Refer to the configuration tabs description below r New Module _ Type 1407 CGCM Combination Generator Control Module Vendor Allen Bradley Parent CNBR Name Node 2 gt Description Comm Format Data Z Revision 4 1 Electronic Keying Compatible Keying Open Module Properties Cancel 74 Once you have added the module you must schedule the connection to the CGCM unit with RSNetWorx for ControlNet software Electronic Keying ATTENTION Be extremely cautious when using the disable keying A option if used incorrectly this option can lead to personal injury or death property damage or economic loss Although the CGCM unit does not physically reside in a ControlLogix chassis electronic keying provides protection against module mismatch You must choose one of these keying options for the CGCM unit during module configuration e Exact match all of the parameters described below must match or the inserted module rejects a connection to the controller Rockwell Automation Publication 1407 UMO001H EN P November 2014 CGCM Unit Configuration Chapter 4 e Compatible module a unit with host firmware major revision 3 or 4 functions as a unit with host firmware major revision 2 if so configured when the new mo
268. ult occurs if the fault output is enabled and the corresponding fault tag in the Output Scheduled Write Data table is set In Series B devices with firmware revision 3 4 or earlier the fault relay operates if either the enable box is checked or the corresponding fault tag in the Output Scheduled Write Data table is set Load Share Synch LE ol R 3 1407 41 General Connection Module Info Generator Transformers Excitation Volts Hz Gain Tracking Voltage Current Frequency Power UEL OEL Phase Rotation Fault X Over Excitation Fault Diode Fault VW Under Excitation Fault PMG Loss V Over Voltage Fault PT Sensing Loss Under Voltage Fault v Over Frequency V Reverse kW Fault Under Frequency Reverse KVAR Fault v Over Current Fault Related Parameters e Fault output enable tags in the Output table Rockwell Automation Publication 1407 UM001H EN P November 2014 Fault Relay 105 Chapter4 CGCM Unit Configuration Notes 106 Rockwell Automation Publication 1407 UM001H EN P November 2014 Introduction Safety Chapter 5 CGCM Unit Startup This chapter provides a suggested set of steps that the user can follow in commissioning a CGCM system This assumes that you have evaluated the system design needs selected a suitable instrument wiring arrangement followed recommended installation procedures configured the RSLo
269. uration table Rated Voltage Sets the generator s rated line to line voltage in volts AC Sets the value of tag GenRated V in the Configuration table Rated Current Sets the generator s rated current in amperes AC Sets the value of tag GenRated_I in the Configuration table Rated Power Sets the generator s rated power in Watts Sets the value of tag GenRated_W in the Configuration table Rated Field Voltage Sets the generator exciter s rated field voltage while the generator is operating at rated voltage kW and kVAR Sets the value of tag GenRatedExcV in the Configuration table Rated Field Current Sets the generator exciter s rated field current in amperes DC This is the current that must be supplied to the exciter while the generator is operating at rated voltage kW and KVAR Sets the value of tag GenRatedExcl in the Configuration table Rockwell Automation Publication 1407 UM001H EN P November 2014 71 Chapter4 CGCM Unit Configuration Transformers Tab The Transformers tab is used to match the unit with the configuration of the generator voltage and current sensing transformers To configure the Transformer tab you must know the system wiring configuration The settings entered in the Transformers tab must correspond to the actual wiring configuration Please refer to Chapter 2 Installation for information on various wiring configurations Please refer to the VT and CT manufacturer s data for assis
270. uts from the CGCM Unit e CGCM Flt This tag indicates if the CGCM unit is still capable that the CGCM unit has a detected an internal failure e CGCMInControl This tag indicates that the CGCM unit has hardware and software excitation enabled e Sparel When operating in Redundant mode this tag indicates the CGCM unit has assumed the role of primary and is providing excitation to the generator 236 Rockwell Automation Publication 1407 UM001H EN P November 2014 Generator Information Appendix F Configuration Record Worksheet We suggest you use these charts to record the initial configuration settings of the CGCM unit for each generator Please make a copy of this appendix for each generator to be controlled After entering the data and settings keep this information for future reference Refer to Chapter 4 for more information on configuration of the CGCM unit Parameter Units Generator data Generator manufacturer and serial number N a Rated frequency Hz Rated voltage VAC Rated current A AC Rated power W PMG rated voltage VAC Rated field voltage VDC No load exciter field voltage VDC Rated field current ADC Exciter maximum forcing current ADC Generator direct access transient time constant TG Generator exciter field time constant Te In addition these generator characteristic curves provide information helpful in configuring specific functions e Reactive capability curve
271. wn in the table below Table 39 ControlNet Data Types Table BOOL Boolean SINT 8 bit byte value USINT 8 bit unsigned value INT 16 bit signed value UINT 16 bit unsigned value DINT 32 bit signed value UDINT 32 bit unsigned value REAL 32 bit floating point value All data is stored in Little Endian format least significant byte first This is assumed for all data and structure formats described in this document that do not have the storage format specifically defined All integers and double integers are displayed in decimal Identity Object class code 0x01 The Identity Object is used to provide identification information about the device Rockwell Automation Publication 1407 UM001H EN P November 2014 197 Appendix C 198 Additional ControlNet Network Information Identity Class Instance instance 0 Instance 0 of any ControlNet object represents the class itself The Get Attributes All service for instance 0 of the Identity Object returns the following information Table 40 Get Attributes All service code 0x01 Name Attr ID Data Type Value Revision 1 UINT 1 Max Instance 2 UINT 2 Max ID Number of Class Attributes 6 UINT 0 Max ID Number of Instance Attributes 7 UINT 0 Identity Object Instance 1 CGCM device instance Instance 1 of the Identity Object represents the CGCM device The Get Attributes All service for instance 1 of the Identity Object returns
272. y shuts down excitation if one of these faults occurs e Overexcitation voltage e Reverse VAR e Logix controller fault Fault conditions can also be configured to activate the CGCM unit fault relay output Once configured the CGCM unit fault relay operates independently of the host Logix controller program including Controller Run Program mode Refer to Chapter 4 for information on configuring the fault relay operation CGCM Protection Capabilities The protective functions in the CGCM unit are time proven and designed to provide a high degree of reliability repeatability longevity and accuracy The CGCM unit is designed to meet or exceed applicable CE standards but was not tested to all standards that many North American utilities use to define utility grade protection However the CGCM unit does possess many of the features that define utility grade protection 54 Rockwell Automation Publication 1407 UM001H EN P November 2014 CGCM Unit Operation Chapter 3 The CGCM unit can be used as primary protection in applications not requiring utility grade protection or in utility applications where the authority having jurisdiction has approved the CGCM unit for use as primary protection In applications requiring utility grade protection where the local authority has not evaluated or approved the CGCM unit the CGCM unit can be used for secondary protection in conjunction with a primary protection system Loss of Excitation Current

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