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SIN.NT.023.5.ENG

1. A wef pe H S NI zt del Jj y LLL 978 ar i 7 T 1 KH 98 ER s J SQ 2 J LIO Po 5 Q E 2 X i a Ane Pr sar A 2 o Umm gt gt amp LL c CE t e 9 Dc S o J VV A DI INN RI V e o Op 5 T di Y O 3 H N 4 FORI M6 D MarelliGenerators 29 ENGLISH D MarelliGenerators 52 5 353 30 N 4FORI 45 D MarelliGenerators INSTALLATION Fig 4 2 b MEC 100 Standard Fastening SIN NT 023 5 INSTALLATION ENGLISH D MarelliGenerators 4 5 CONNECTIONS TYPICAL 4 5 1 Power Supply from Auxiliary Winding x and V phases must always be connected to S1 and S2 Relay1 If the voltage sensing connection is single phase type S3 is not used All contact terminals can be associated Relay2 to each M term
2. 19 3 6 7 Diode Failure e 20 3 7 LIMITATION FUNCTIONS em 21 3 7 1 Under trequency Limiter orici eiit iet enini eo ne pe leali ipa 21 3 7 2 Over excitation Limiter ae ie 22 3 7 3 Under excitation Eilmilter iir ee ee Aes 23 3 7 4 Inr sh GCurrent Limiter ierit gie efc tet HD P Hg ene 24 3 8 PROGRAMMABLE d e E C Ee e c D HE pL e ca 24 3 9 REACTIVE DROOP COMPENSATION i 24 310 24 3 11 SETTING THE P I D 25 3 11 1 Proportional Integral and Derivative 24440404 0 25 3 14 27 Derivative Ad UStITIents oscoci eo ER EE E 26 113 P ED in PEVAR Modes et eat e Erneut e ee aeu E 26 3 12 DE EXCITATION SHUTDOWN CONTACT INSTRUCTIONS 26 A INSTALLATION n 27 4 1 INTRODUCTION EE 27 4 2 MOUNTING ir E ideas dip elie nee Re HI ed GS eel HI CR 27 MarelliGenerators 4 SIN NT 023 5 CONTENTS ENGLISH MarelliGenerators 4 3 SERIAL COMMUNICATION AND PRELIMINARY SET UP 27 4 4 IMPORTANT NOTES CONCERNING CONNECTIONS RESTRICTIONS
3. 8 EHE 8 2 TECHNICALSPECIFICATIONS i asili 9 2 1 SUPPEY AND POWER lla e UE etes AERE ENS 9 2 2 GENERATOR VOLTAGE SENSING 9 2 3 NETWORK VOLTAGE SENSING 9 2 4 GENERATOR CURRENT SENSING 9 2 5 ANALOGUE AUXILIARY INPUTS 10 2 6 EXCITER FIEUD ii ee dees 10 2 7 AGGURACY M 10 2 8 LIMITERS AND OTHER FUNCTIONS 10 2 9 le 11 210 CONTAC IS EE 11 211 5 12 2 12 PHYSICAL 12 MI peer ee 12 3 FUNCTIONAL DESCRIPTION 13 3 1 ie 13 3 2 POWER AND CARD SUPPLY P1 P2 P3 ui 13 3 3 OPERAMNG MODES sai EE 13 3 3 1 AVR Automatic Voltage Regulation MOde 13 3 3 2 PF Power Factor Regulation Mode 13 3 3 3 VAR Reactive Power Regulation 13 3 3 4 FCR Field Current Regulation M
4. 2 12 PHYSICAL SPECIFICATIONS PARAMETER DATA Weight Total weight 1973g Length 353 0mm Dimensions Width 183 5mm Height 52 5mm 2 13 EMC Emission Reference standard EN 61000 6 3 2001 EN 61000 6 3 A11 2004 Test specifications Environmental Phenomena Result EN 55022 Conducted disturbance Complies EN 55022 Radiated disturbance Complies EN 55014 1 Discontinuous disturbance voltage Complies EN 61000 3 2 Harmonic current emissions Complies EN 61000 3 3 Voltage fluctuations and flicker Complies Immunity Reference standard EN 61000 6 2 2005 Test specifications Environmental Phenomena Result EN 61000 4 2 Electrostatic discharge Complies EN 61000 4 3 Radiated electromagnetic field Complies EN 61000 4 4 Electrical fast transients Complies EN 61000 4 5 Surge Complies EN 61000 4 6 Injected currents Complies EN 61000 4 8 Power frequency magnetic field N A EN 61000 4 11 Dips short interruptions Complies Apparatus does not contain devices susceptible to magnetic fields The compatibility test results according to the 89 336 EEC and 2004 108 EC Directives and subsequent amendments MarelliGenerators SIN NT 023 5 FUNCTIONAL DESCRIPTION ENGLISH MarelliGenerators 3 FUNCTIONAL DESCRIPTION 3 1 INTRODUCTION In the following section a short description of the functions implemented by the MEC 100 and the relevant limits of u
5. MEC 100 gt U C JJ D 4 Z Current sensing CT ft Generator VT Generator P2 E Mya Supply VT De excitation contact MarelliGenerators 34 SIN NT 023 5 MEC 100 INTERFACE SYSTEM ENGLISH MarelliGenerators 5 MEC 100 INTERFACE SYSTEM 5 1 INTRODUCTION The MEC 100 Interface System provides an interface tool between the MEC 100 and the user capable of Providing a user friendly and intuitive working environment for the setting of the regulation system parameters Displaying in real time the electrical data of the system controlled by the MEC 100 Allowing the system status control Enabling the storage of the complete set of system parameters the form of program files or text files 5 2 INSTALLING MEC 100 INTERFACE SYSTEM The CD ROM provided together with the MEC 100 system includes the utility for the installation of the MEC 100 Interface System software and the user and maintenance manuals User Manual of the regulation system 5 2 1 Minimum System Requirements Here below the minimum system requirements for the proper installation and utilization of the software are listed IBM compatible Intel Pentium Il 300MHz or higher recommended 128 of RAM 256MB or more recommended Microsoft Windows 95 98 Me 2000 XP Vista CD ROM drive R
6. Settings In Fig 5 7 5 a the stability parameters configuration area is shown PID SETTINGS PARAMETER UNIT MIN MAX DATA Stability Settings custom Settings Voltage Regulation Stability Proportional Gain 8 8 8 Integral Gain Derivative Gain Derivative Adjustments 1 Derivative Item Time IL 80 2 Derivative Item Filter 16 PF YAR Regulation Stability Proportional Gain 8 Integral Gain 8 Fig 5 7 5 a Stability Parameter Area Four sets of parameters can be identified Stability settings Custom setting select this item in order to set individually each one of the following fields LIMI Standard setting each configuration set contains an entire parameter set stored by factory or by user Voltage Regulation Stability see Par 3 11 1 Q Proportional Gain enter in this field the proportional constant value of the regulation loop Q Integral Gain enter in this field the integrative constant value of the regulation loop Q Derivative Gain enter in this field the derivative constant value of the regulation loop Derivative Adjustments see Par 3 11 2 1 Derivative Term Time enter in this field the parameter Time for derivative adjustment Q 2 Derivative Term Filter enter in this field the parameter Filter for derivative adjustment D MarelliGenerators SIN NT 023 5 49 ENGLISH MEC 100 INTERFACE SYSTEM 50 D MarelliGe
7. sese 28 4 5 CONNECTIONS TXYPIGAL cater pearl Yea 31 4 5 1 Power Supply from Auxiliary Winding 31 4 5 2 Power Supply from PMG Permanent Magnet 32 4 5 3 Power Supply from Main Terminals Low Voltage 33 4 5 4 Power Supply from Main Terminals Medium 34 5 MEC 100 INTERFACE SYSTEM 35 Sele INTRODUCTION EC m 35 5 2 INSTALLING MEC 100 INTERFACE SYSTEM 35 5 2 1 Minimum System Requirements 35 5 2 2 Installing the MEC 100 Interface SySstem 35 5 2 9 Stating the PROGM Gli suos ccce eanne niei 35 5 2 4 Uninstalling the MEC 100 Interface System 36 5 2 5 Connection Between MEC 100 and PC 36 595STAREUP EE 36 5 3 1 Acceptance of the General Contract Conditions i 36 5 3 2 Description of the Work 37 5 3 3 Establishing a Communication LInK 38 5 4 PASSWORD MANAGEMENT 39 5 4 1 Entering Password eie cd ee reme eA eee bebe Le eee 39 5 42 Changing Password 39 5 5 CHANGING THE SYSTEM S
8. 55 5 8 4 Auxiliary Parameter Display 56 5 8 5 Phase Graphical Display nic eee 56 5 8 6 Oscillographic Display EL 56 5 8 7 Power Diagram recette te ep ri i eee ee 57 6 SET UP PROCEDURE 58 6 1 MEC 100 INTERFACE SYSTEM 58 6 2 PREPARAZIONE DEL MEG2100 intret eere i aaa 58 6 3 STARTING THE PROGRAM etre le dialer 59 6 4 ESTABLIGHING COMMUNICATION nennen nennen trennen trennen nens 59 6 5 ENTERING THE 55 60 6 6 CONFIGURE THE SYSTEM 5 60 6 7 SAVING A SET OF PARAMETERS 68 7 WARRANTY AFTER SALES SERVICE AND MAINTENANCE 69 yeast 69 7 2 PREVENTIVE MAINTENANCE eins iiri ete dat Cin GSi Ae 69 AFTER SALES SERVICE ri a cea alari RRS 69 MarelliGenerators 6 SIN NT 023 5 GENERAL INFORMATION ENGLISH MarelliGenerators 1 GENERAL INFORMATION 1 1 INTRODUCTION MEC 100 SERIES The Marelli Motori Digital Regulation Systems included in MEC 100 series are microprocessor based electronic devices for the set up and monitoring of the excitation system of Marelli generators with frame size ranging between 400 and 8
9. Primary Current A enter in this field the primary current value of the CT used 1 to 10000A with minimum increase of 1A Secondary Current A select in this field the secondary current value of the TA used by choosing between the two standard values 1A and 5A Calibrations this set of parameters allows to calibrate the MEC 100 sensing function in case of non ideal transformation ratios in this way the correct voltage current and phase values are guaranteed to both the regulation and monitoring areas Generator VT Ratio 95 if the MEC 100 Interface System senses and displays a generator voltage value higher of a given percentage than the actual value you need to add this percentage to the percentage already entered in the field 100 of default to obtain a correct and accurate sensing calibration 95 to 105 with minimum increase of 0 1 Line VT Ratio if the MEC 100 Interface System senses and displays a network voltage value higher of a given percentage than the actual value you need to add this percentage to the percentage already entered in the field 100 of default to obtain a correct and accurate sensing calibration 95 to 105 with minimum increase of 0 1 Generator CT Ratio if the MEC 100 Interface System senses and displays a generator current value higher of a given percentage than the actual value you need to add this percentage to the percentage already entered in the field 100 of defaul
10. 6 7 SAVING A SET OF PARAMETERS Gey TO DO Click the Database button in the menu bar of the MEC 100 Interface System In the displayed pull down menu point to the Save Parameter File On line item and click In the File Manager window select a directory where to save the file type the file name and click on OK To load a parameter set see the User Manual A PAY ATTENTION TO SAVE ALWAYS THE PARAMETER FILE AFTER PRELIMINARY SET UP D MarelliGenerators 68 SIN NT 023 5 WARRANTY AFTER SALES ENGLISH MarelliGenerators 7 WARRANTY AFTER SALES SERVICE AND MAINTENANCE 7 1 WARRANTY The General Contract Conditions are specified in the presentation window at the MEC 100 Interface System start up see Par 5 3 1 see also the packing documentation and the relevant file in installation CD ROM Please always refer to this document for all the warranty details 7 2 PREVENTIVE MAINTENANCE The only preventive maintenance required on the MEC 100 is a periodical check up of the connections between the MEC 100 and the system pay attention that all the connections are clean and tight and no damages or faults are affecting the wiring The MEC 100 is completely resin bonded and isolated to keep a high operating reliability even in difficult working conditions high levels of humidity dust salty atmosphere and in presence of vibrations if it is not working or not correct behaviours are present MEC 10
11. Field Overvoltage Voltage Threshold V enter the maximum allowed field voltage level value 0 to 200V with minimum increase of 1V Field Overvoltage Time Delay s enter in this field the protection time delay 0 to 300s with minimum increase of 0 1s Field Overvoltage Enable Protection click to activate the field over voltage protection function Field Overvoltage Apply to Relay 1 click to assign the protection intervention signal to relay 1 FIELD PROTECTIONS PARAMETER UNIT MIN DATA Field Overcurrent 10 0 n Apply to Relay2 Maximum Current 0 15 Time Delay s 0 Apply to Relay Enable Protection Field Overvoltage Voltage Threshold 0 Time Delay s 0 Enable Protection Apply to Relayl 200 Apply to Relay2 Field Overvoltage Apply to Relay 2 click to assign the protection intervention signal to relay 2 Generator Protections Window TO DO 2 2 Generator Overcurrent Enable Protection click to Voltage Threshold x 0 10 75 activate the generator over current protection function Time Delay 0 a Generator Overcurrent Maximum Current enter the maximum allowed generator current expressed in percentage with respect to the generator rated current value 0 to 120 with minimum increase of 1 Generator Overcurrent Maximum Continuative Current enter the maximum continuous generator current expressed
12. MAX DATA order to tune the parameters each one Stability Settings Voltage Regulation Stability Proportional Gain enter Custom Settings 21 5 Remove the proportional constant value of the regulation loop Voltage Regulation Stability Integral Gain enter the eltage Regulation Stability integrative constant value of the regulation loop Proportional Gain 700 Voltage Regulation Stability Derivative Gain enter the Integral Gain 90 derivative constant value of the regulation loop Derivative Gain 500 Derivative Adjustments 1 Derivative Term Time Derivative Adjustments enter the parameter Time for derivative adjustment 1 Derivative Item Time 60 Derivative Adjustments 2 Derivative Term Filter enter the parameter Filter for derivative adjustment 2 Derivative Item Filter 20 PF VAR Regulation Stability Power Factor Regulation Stability Proportional Gain Gain 100 enter the proportional constant value of the regulation Integral Gain 100 loop Power Factor Regulation Stability Integral Gain enter the parameter Filter for derivative adjustment iMi PID setting advises in case of MEC 100 without factory set up take the PID parameters from the following table Generator AVR MODE PF VAR MODE Type KD KI MJB 400 MJB 450 MJB 500 MJB 560 MJH 630 MJH 710 They are only
13. Q SIN NT 023 5 Voltage Threshold V enter in this field the maximum allowed field voltage level value 0 to 200V with minimum increase of 1V Time Delay s enter in this field the time interval value during which the MEC 100 is authorized to supply the Voltage Threshold value before the activation of the relevant protection 0 to 10s with minimum increase of 0 1s MarelliGenerators 51 ENGLISH MEC 100 INTERFACE SYSTEM D MarelliGenerators M Enable Protection protection activation flag click on this button to activate the field over voltage protection function M Apply to Relay 1 relay 1 assignment flag click on this button to assign the protection intervention signal to relay 1 M Apply to Relay 2 relay 2 assignment flag click on this button to assign the protection intervention signal to relay 2 AN BY DEFAULT PROTECTIONS ARE INITIALLY DISABLED Pay particular attention when configuring the MEC 100 to the activation of all concerned protections 5 7 8 Generator Protections In Fig 5 7 8 a the generator protection parameters configuration area is shown GENERATOR PROTECTIONS PARAMETER UNIT MIN MAX DATA Generator Overcurrent Maximum Current Maximum Continuative Curent 2 0 110 100 Time Delay v Enable Protection V Relay Apply to Relay2 Generator Overvoltage Voltage Threshold 100 150 112 Time Delay 0 300 10
14. if FCR is selected an instantaneous switch to FCR Mode will be operated when the loss of sensing occurs Diode Monitoring Window TO DO Low Level Maximum Ripple enter the maximum DIODE MONITORING DEVICE allowed excitation current ripple low level of failure SS SI IE expressed in percentage with respect to the generator Low Level 2 2 2 2 2 2 rated excitation current value 0 to 100 with minimum increase of 1 Maximum Ripple 0 100 40 Low Level Delay s enter the time delay 0 to 100s with minimum increase of 1s High Level Maximum Ripple 26 enter the maximum HighLevel allowed excitation current ripple high level of failure Ripple S M 100 expressed in percentage with respect to the generator Des s 0 10 5 0 rated excitation current value 0 to 10096 with minimum increase of 1 Protection Options High Level Delay s enter the time delay 0 to 10s v Enable Monitoring Enable Shutdown with minimum increase of 1s Alarm Options Protection Options Enable Monitoring click to activate Low Level v ApplytoRelay Apply to Relay2 the diode monitoring function both Low Level and High High Level Apply to Relay Apply to Relay2 Level Protection Options Enable Shutdown click to activate the shutdown option only for High Level Alarm Options Low Leve
15. 734 0629 T 460 3 7805 3736 27 11 828 8089 44 1509 615514 usa marellimotori com F 60 3 7803 9625 southafrica marellimotori com uk marellimotori com asiapacific marellimotori com MARELLI MOTORI reserves the right to change the design technical specification and dimensions in order to update or improve Rs products without prior notice
16. ATTENTION TO THE MODIFICATION OF THE SETPOINT VALUES The limit thresholds set by the MEC 100 Interface System to the setpoint values do not protect against the selection of setpoints which may be potentially dangerous for devices and or installations connected to the generator In all configuration operations of the MEC 100 Interface System always check that the new setpoints to be entered are appropriate to the devices and or installations connected to the generator Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to a wrong setpoint setting MarelliGenerators SIN NT 023 5 MEC 100 INTERFACE SYSTEM ENGLISH MarelliGenerators Voltage Matching Q Minimum Limit enter the minimum value of the network voltage range within which the voltage matching is enabled this limit is expressed in percentage respect to the rated generator voltage 90 to 100 with minimum increase of 1 Q Maximum Limit enter the minimum value of the network voltage range within which the voltage matching is enabled this limit is expressed in percentage respect to the rated generator voltage 10096 to 110 with minimum increase of 1 Droop Settings Q Reactive Droop 96 enter in this field the Droop Compensation value 95 for parallel operations 0 to 10 with minimum increase of 0 1 5 7 5 Stability
17. Current i 0 6 displayed A indicator in Fig 5 8 6 a Next to each one of the items corresponding to the measured parameters an option button for the selection of the parameter to be displayed is located To select the parameter to be displayed click on the option button associated to the relative item Fig 5 8 6 a E Visualisation of the selected parameter in Oscillographic Display function of the time B indicator in Fig 5 8 6 a A C indicator shows the button to open the oscillographic display settings In the example in the Fig 5 8 6 a the time profile of the voltage between the U and V phases measured during the SOFT START phase is shown Line Voltage Line Frequency a Apparent Power FK Real Power FK qot Va or Reactive Power Power Factor MarelliGenerators SIN NT 023 5 MEC 100 INTERFACE SYSTEM ENGLISH MarelliGenerators 5 8 7 Power Diagram 539 e EXCITATION CURRENT ia Generator Parameter Setting POWER DIAGRAM 7 MEC 100 Interface System Database Tools Help cabo MarelliGen iators All sere li 100 75 REACTIVE POWER RATED APPARENT POWER Fig 5 8 7 a Power Diagram In Fig 5 8 7 a an image of the power diagram is shown It provides in real time the generator operating point with A instantaneous indication of active and reactive power B indicator in Fig 5 8 7 a A visua
18. Enable Protection Apply to Relay Apply to Relay2 Generator Undervoltage Voltage Threshold 0 100 75 Time Delay ES 0 300 10 Enable Protection V Apply to Relayl lt Apply to Relay2 Loss of Sensing jw Enable Protection Applyto Relay Apply to Relay2 Shutdown FCR Fig 5 7 8 a Generator Protection Parameter Area Four sets of parameters can be identified Generator Overcurrent see Par 3 6 5 0 Maximum Current 96 enter in this field the maximum allowed generator current level value related to the following Time Delay and expressed in percentage with respect to the generator rated current value 0 to 120 with minimum increase of 1 Q Time Delay s enter in this field the time interval value during which the MEC 100 is authorized to supply the Maximum Current before the activation of the relevant protection 0 to 3600s with minimum increase of 1s Maximum Continuative Current 95 enter in this field the maximum continuous generator current value expressed in percentage with respect to the generator rated current value 0 to 11096 with minimum increase of 1 Enable Protection protection activation flag click on this button to activate the generator over current protection function Apply to Relay 1 relay 1 assignment flag click on this button to assign the protection intervention signal to relay 1 Apply to Relay 2 relay 2 assignment flag click on
19. Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to no insulation between MEC 100 and other external device connected to these inputs 3 5 1 START C1 Contact Excitation start contact normally open switch logic when this contact is closed the MEC 100 supplies power to the exciter field and continues to do so until the contact remains closed When this contact is opened the power supply to the exciter field is stopped If the excitation is present START contact closed and the temporary STOP contact is closed see Par 3 5 2 the START contact is disabled and to supply the excitation power again it is necessary first to open and then re close the START contact with STOP opened When the START contact is closed the LED corresponding to the Excitation State item in the system status window in System Monitoring see Par 5 8 2 becomes green AN WARNING START CONTACT MUST NOT BE CONSIDERED OR USED AS EMERGENCY AND OR SAFETY DEVICE START contact has only an operating function it can not be considered or used as emergency and or safety device Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to a not allowed use of START contact 3 5 2 STOP C2 Contact Excitation stop contact normally
20. Voltage Matching Minimum 9 100 100 Maximum 100 110 110 Droop Settings Reactive Droop 1 10 4 0 Fig 5 7 4 a Other Settings Area Four sets of parameters can be identified Soft Start see Par 3 10 a Soft Start Time s enter in this field the time required by the voltage ramp at the excitation Start up to reach the setpoint value defined in the setpoints window see Par 5 7 3 0 to 3600s with minimum increase of 1s Traverse rate Voltage s enter in this field the variation speed of the generator voltage setpoint when this last is modified by means of the UP DOWN contacts or the corresponding buttons of the MEC 100 Interface System see Par 5 3 2 0 1 s to 5 s with minimum increase of 0 1 s Power Factor hundredthsPF s enter in this field the variation speed of the power factor setpoint when this last is modified by means of the UP DOWN contacts or the corresponding buttons of the MEC 100 Interface System see Par 5 3 2 1hundredthsPF s to 10hundredthsPF s with minimum increase of 0 1 hundredthsPF s Reactive Power s enter the variation speed of the reactive power setpoint when this last is modified by means of the UP DOWN contacts or the corresponding buttons of the MEC 100 Interface System see Par 5 3 2 0 1 s to 5 s with minimum increase of 0 1 s The traverse rate of the excitation current is fixed and kept slow by default PAY PARTICULAR
21. a safety value within a pre established time interval which can be derived from the curve shown in Fig 3 7 2 a A Maximum Current Allowed Field Current A Minimum Time Delay 1 1 1 1 n 1 1 1 Time s Fig 3 7 2 a Excitation Limiter Curve This characteristic curve is calculated starting from the determination of a maximum current level which can never be exceeded with value included between 0 and 25A minimum increase of 0 1A a minimum operation time value 0 to 10s minimum increase of 0 1s and a maximum field current value which the MEC 100 can support continuously without the activation of the relevant protection 0 to 15A minimum increase of 0 14 When the field current value exceeds the maximum continuative current value the field over current limitation is activated after a time interval depending on the field current value which has been reached according to the curve of Fig 3 7 2 a Higher the over current shorter the operation time The activation of this limitation consists in reducing the field current until the maximum continuative current value is reached This current value is maintained until both the following conditions are simultaneously satisfied Enough time is passed to eliminate the generator overheating The operating conditions set the excitation current value
22. curve which the card processor makes the voltage setpoint follow to reach 100 of the pre established value Obviously under real conditions and at full rom the generator voltage does not start from OVac but from the residual machine voltage value moreover under real conditions starting from Orpm up to reach the rated speed the voltage ramp up may not be perfectly linear but on the contrary may present a light overshoot at low frequencies and voltages in any case included within a range of not significant values MarelliGenerators SIN NT 023 5 FUNCTIONAL DESCRIPTION ENGLISH D MarelliGenerators Voltage in of the voltage setpoint 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time s Fig 3 10 a Generator Voltage Setpoint when the SOFT START Function is Active 3 11 SETTING THE PARAMETERS One of the functions which make the MEC 100 a particularly efficient and flexible device is the configurability of the parameters that define the transient performances and the stability of the control system In particular the MEC 100 system allows to use P I D Proportional Integral Derivative controllers which can be individually set by the direct insertion of the values corresponding to the relevant constants Kp Ki and Kp 3 11 1 Proportional Integral and Derivative Controllers In the Table below an indicative scheme is provided where the Ke Ki and Kp values are determined starting from the hyp
23. discrete time used for the derivate calculation 2 Derivative item Filter describes the time constant referred to the discrete time of the low pass filter used to eliminate the derivate noise 3 11 3 P I D in PF VAR Modes The MEC 100 Interface System provides P I D controllers and 2 derivative adjustments to set the stability in AVR Mode Only P I controllers must be set in PF and VAR Modes For the setting of each parameter see Par 5 7 5 3 12 DE EXCITATION SHUTDOWN CONTACT INSTRUCTIONS Most of the generator connection diagrams include a de excitation shutdown contact between the generator power source main terminals auxiliary winding PMG etc and the MEC 100 supply terminals P1 P2 P3 if used see Par 4 4 Switching off the de excitation contact leads to stop powering the generator exciter in a short time Especially in generator hydro turbine applications the load rejection i e when generator is paralleled with the network must be always simultaneously accompanied by the prompt excitation shutdown of the generator in order to limit the generator over voltage due to the load rejection and the turbine over speed In case of hydro turbine applications the de excitation contact must be always switched off simultaneously with the load rejection and or disconnection from parallel operation Generally Marelli Motori recommends to associate the momentary switch on of the STOP contact C2 to the sw
24. in this field the time interval value during which the MEC 100 is authorized to supply a voltage lower than or equal to the Voltage Threshold value before the activation of the relevant protection 0 to 300s with minimum increase of 1s Enable Protection protection activation flag click on this button to activate the generator under voltage protection function Apply to Relay 1 relay 1 assignment flag click on this button to assign the protection intervention signal to relay 1 Apply to Relay 2 relay 2 assignment flag click on this button to assign the protection intervention signal to relay 2 Loss of Sensing see Par 3 6 6 M Enable Protection protection activation flag click on this button to activate the loss of sensing protection function M Apply to Relay 1 relay 1 assignment flag click on this button to assign the protection intervention signal to relay 1 M Apply to Relay 2 relay 2 assignment flag click on this button to assign the protection intervention signal to relay 2 Shutdown FCR protection type selection If Shutdown is selected an instantaneous de excitation of the generator will be operated when the loss of sensing occurs if FCR is selected an instantaneous switch to FCR Mode will be operated when the loss of sensing occurs BY DEFAULT PROTECTIONS ARE INITIALLY DISABLED particular attention when configuring the MEC 100 to the activation of all concerned protections
25. of the Work Window After starting the MEC 100 Interface System as described in Par 5 2 3 e 5 3 1 the work window for the configuration and monitoring of the regulation system parameters appears In Fig 5 3 2 a the displayed screen is shown 7 MEC 100 Interface System Database Tools Help Sib MarelliGenerators GENERATOR RATED DATA e SERIAL NUMBER 111111 S RATED VOLTAGE 400 RATED CURRENT 50 00 A as RATED POWER FACTOR 0 800 Us RATED FREQUENCY 50 00 Hz PARAMETER UNIT O EXCITATION VOLTAGE 30 0 Y c Generator Voltage U V E 3 158 DOWN EXCITATION CURRENT 1 60 C Generator Voltage V W a 4 803 v Generator Voltage U W 0 v GENERATOR PARAMETER SETTING Generator Current W 0 SYSTEM PARAMETERS Generator Frequency 0 0 Hz PARAMETER UNIT MIN DATA Excitation Voltage a o v Excitation Current 0 138 SYSTEM PARAMETERS Generator Data e Line Voltage a SENSING Reed M 400 0 Line Frequency e 0 0 Hz Rated Current Es 5017 e Apparent Power 0 SETPOINT Real Power kw ss Rated Power Factor 2 0 800 Reactive Power g KVAR Rated Frequency 50 00 Power Factor PID SETTIN
26. on OK RATED CURRENT RATED POWER FACTOR P This operation only allows to check the configuration file it is not possible Fig 5 6 3 a lo save a new configuration file in Off line operating mode In order to Opening a Configuration Set Off line modify a parameter set previously stored please follow the instructions of Par 5 5 e 5 6 1 5 6 4 Printing a Set of Parameters Gey TO DO To print a whole set of parameters Connect to the MEC 100 see Par 5 3 3 if required Enter the password if required see Par 5 4 1 Click the button shown in Fig 5 6 4 a A new window will appear see Fig 5 6 4 b Type the required data and click the button Preview A preview of the parameter list will appear lt To print it click the button shown in Fig 5 6 4 c MEC 100 Interface System MarelliGenerators Report Data MEC 100 serial number 000999 Order number 765432 Customer Customer name Type MJB800 hr Test date 06 04 2008 Preview Close Fig 5 6 4 b Print data typing MEC 100 Interface Syste Database Tools Help cab ON lliGeneratoi Fig 5 6 4 a Print function selection Parameters Report f 2 arelliGenerators MEC 100 Interface System Order number 165432 Test date 06 04 2009 NEM se nr Customer Customer name Software Release 3 0 1 MEC 100 serial numb d Type MJBS00 Firmware Release 0 00 PARAMETER SYSTEM PARAMETERS Generat
27. open momentary pushbutton logic when this contact is temporarily closed the MEC 100 stops the power supply to the exciter field When the stop command is given the MEC 100 does not supply the exciter field e the contact can be left again This input is priority to the START contact If the excitation is present START contact closed and the temporary STOP contact is temporarily closed the STAHT contact is disabled and to supply the excitation power again it is necessary first to open and then re close the START contact with STOP opened When the STOP contact is closed the LED corresponding to the Operating Status item in the system status window in System Monitoring see Par 5 8 2 turns off STOP can be associated to the de excitation shutdown contact see Par 3 12 WARNING STOP CONTACT MUST NOT BE CONSIDERED OR USED AS EMERGENCY AND OR SAFETY DEVICE STOP contact has only an operating function it can not be considered or used as emergency and or safety device Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to a not allowed use of STOP contact MarelliGenerators SIN NT 023 5 15 ENGLISH FUNCTIONAL DESCRIPTION MarelliGenerators 3 5 3 UP C3 Contact Active operational setpoint increasing contact normally open momentary pushbutton logic AVR Mode increases the generator volt
28. remote control 8 contacts for external interface MarelliGenerators ENGLISH 1 2 3 Outputs MarelliGenerators lt PWM output up to a maximum of 15A in continuous current 2 programmable output relays for signalling the occurred alarm 1 2 4 Human Machine Interface GENERAL INFORMATION RS 232 communication port to interface with PC through MEC 100 Interface System software 100 Interface System software for Windows to set the generator adjustment and control parameters 1 3 DEVICE SELECTION The part number and the name together with the proper suffix describe the options included in the specific device Here below the selection tables STYLE NUMBER SELETION DEVICE MODEL NAME SUFFIX PART NUMBER gt MEC 100 5 M71FA300A Basic MEC 100 B M71FA310A With Diode Monitoring MEC 100 D M71FA320A OPTIONS GUIDE FEATURE M71FA300A M71FA310A M71FA320A AVR v FCR PFR VAR P D parameterization Soft start Reactive Droop Compens Field over voltage Field over current Generator over voltage Generator under voltage Generator over current Loss of voltage sensing NISSEN Diode Failure Monitoring Over excitation Limiter Under excitation Limiter Under frequency Limiter Internal Inrush Current Lim 2 analogue inputs 4 20mA 8 digital inputs Human M
29. required to the MEC 100 below the maximum continuous current value MarelliGenerators SIN NT 023 5 FUNCTIONAL DESCRIPTION ENGLISH 5 5 MarelliGenerators The activation of this limitation is accompanied by a visual warning in the MEC 100 Interface System Overexcitation Limiter item flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays This function can be enabled disabled If enabled it can operate in all working Modes Even if disabled the MEC 100 limits the maximum excitation current which can be supplied to the maximum allowed set value 3 7 3 Under excitation Limiter The MEC 100 is capable of activating an under excitation limitation function to avoid demagnetizing effects and losses of synchronism during the paralleling operations When this function is active the activation results from the relevant authorization the MEC 100 senses the reactive power output of demagnetizing type and limits any consequent field current reduction The area of operation of the under excitation limitation function is identified by a curve like that shown in Fig 3 7 3 a B 10096 2 a 50 ra 0 0 0 0 50 100 Reactive Power Fig 3 7 3 a Under excitation Limitation Curve As you can see in the figure above the dashed portion is the area where the MEC 100 cannot operate the limitation will be activated to
30. shown It allows to display in real time B The status of the limiters E The status of the protections In the last column each one of the illuminated LEDs identifies the relevant active alarm Together with the LED also the relative description of the alarm is flashing red PARAMETER TYPE DATA UNIT Generator Voltage U V Generator Voltage U W Generator Voltage V W Generator Current W Generator Frequency Excitation Voltage Excitation Current Line Voltage Line Frequency Apparent Power Real Power Reactive Power Power Factor Fig 5 8 1 a Electrical System Parameter Monitoring DESCRIPTION STATUS Voltage Matching Reactive Droop Compensation Parallel with Line Field Current Regulation FCR Operating Status GOGO Fig 5 8 2 a System Status Monitoring ALARM DESCRIPTION STATUS Overexcitation Limiter Underexcitation Limiter Underfrequency Limiter Field Overcurrent Protection Field Overvoltage Protection Generator Overcurrent Protection Generator Overvoltage Protection Generator Undervoltage Protection Loss of Sensing Protection Diode Monitoring Low Level Diode Monitoring High Level Fig 5 8 3 a Alarm Status Monitoring D MarelliGenerators SIN NT 023 5 55 ENGLISH MEC 100 INTERFACE SYSTEM 56 MarelliGenerators 5 8 4 Auxiliary Parameter Display MEC 100 Interface System Database Tools Help In Fig 5 8 4 a an ima
31. standard parameters not the optimum and a subsequent tuning step by step is necessary to get the best PID setting for the application In order to tune correctly the PID parameters enter the values shown in table 6 6 a for the proper generator frame size and verify if they are proper for the application if necessary modify one by one KP KI KD with this order changes have to be lower then 10 of the actual value and can be increasing or decreasing depending on the generator time response Chosen voltage regulation PID parameters can be verified as follows by applying a small load not higher than 50 of the rated value and measuring voltage dip and related recovery time rejecting the same load and measuring the voltage overshoot and related recovery time Chosen PF regulation PI parameters can be verified as follows applying a PF step value not higher than 0 1 and measuring PF overshoot if present and recovery time MarelliGenerators SIN NT 023 5 SET UP PROCEDURE ENGLISH D MarelliGenerators Should better transient performances be required contact the Marelli After Market Department for more information see Section 7 Should the chosen PID parameters be unproper or dangerous for the application stop the generator and contact the Marelli After Market Department see Section 7 Limiters Window 2 2 DO Underfrequency Limiter Corne
32. value 0 to 100 with minimum increase of 1 Q Delay s enter in this field the time interval value during which the MEC 100 is authorized to work at over Maximum Ripple before the activation of the relevant protection 0 to 10s with minimum increase of 1s Protection Options see Par 3 6 7 Enable Monitoring protection activation flag click on this button to activate the diode monitoring function M Enable Shutdown shutdown activation flag click on this button to activate the shutdown option for High Level monitoring AN SHUTDOWN OPTION CAN BE USED ONLY ASSOCIATED TO HIGH LEVEL OF FAILURE Low Level can be only associated to external annunciation Alarm Options see Par 3 6 7 High Level M Apply to Relay 1 relay 1 assignment flag click on this button to assign the protection intervention signal to relay 1 M Apply to Relay 2 relay 2 assignment flag click on this button to assign the protection intervention signal to relay 2 Low Level M Apply to Relay 1 relay 1 assignment flag click on this button to assign the protection intervention signal to relay 1 M Apply to Relay 2 relay 2 assignment flag click on this button to assign the protection intervention signal to relay 2 AN BY DEFAULT PROTECTIONS ARE INITIALLY DISABLED Pay particular attention when configuring the MEC 100 to the activation of all concerned protections 54 MarelliGenerators SIN NT 023 5 MEC 100 INTERFACE
33. 0 must not be repaired or modified without Marelli Motori S p A approval 7 3 AFTER SALES SERVICE For any malfunctions damages or any other queries please contact Marelli Motori S p A After Sales Department AFTER MARKET DEPARTMENT MARELLI MOTORI S p A Tel 39 0444 479 775 Fax 39 0444 479 757 E mail service marellimotori com Web www marellimotori com D MarelliGenerators SIN NT 023 5 69 ENGLISH NOTES 70 MarelliGenerators MarelliGenerators NOTES SIN NT 023 5 NOTES ENGLISH D MarelliGenerators NOTES D MarelliGenerators SIN NT 023 5 71 ENGLISH NOTES 72 MarelliGenerators MarelliGenerators NOTES SIN NT 023 5 lt MarelliGenerators Tutti i diritti di traduzione riproduzione e addattamento totale o parziale con qualsiasi mezzo comprese le copie fotostatiche e i microfilm sono riservati Neither this book nor any part may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying microfilm and recording or by any information storage and retrieval system without permission and writing from the publisher Questo manuale stampato su carta riciclata un contributo MarelliMotori alla salvaguardia dell ambiente This manual is printed on recycled paper MarelliMotori contribution to the sa
34. 00 The configurability of the system and control parameters makes the MEC 100 series regulators flexible and suitable for a wide range of applications These regulators are completely resin bonded and isolated to keep a high operating reliability even in difficult working conditions high levels of humidity dust salty atmosphere and in presence of vibrations 1 2 MEC 100 SERIES CHARACTERISTICS 1 2 1 Functions 2 2 v 2 2 2 2 Four operating modes e Automatic voltage regulation AVR Mode e Power Factor Regulation PF Mode e Reactive Power Regulation VAR Mode e Field Current Regulation FCR Mode Stability parameters which can be individually set P 1 D or predefined standard parameterizations Soft start with a ramp which can be set in AVR Mode Generators parallel operation by means of Reactive Droop Compensation Generator protections e Field over voltage Field over current Generator over voltage Generator under voltage Generator over current Loss of voltage sensing e Diode Failure Monitoring Excitation limiters over excitation and under excitation Under frequency limiter Internal Inrush Current limiter 1 2 2 Inputs SIN NT 023 5 Generator voltage single phase or three phase sensing Current sensing on single phase 1A or 5A Network voltage single phase sensing 2 auxiliary analogue inputs 4 20mAdc for the setpoint
35. 00s 18 increment 1 maximum continuative threshold Range from 0 to 110 of the rated stator current 196 increment Loss of sensing Alarm time delay Diode Monitoring Excitation current ripple levels and time delays 1 low failure level Range from 0 to 100 of the rated excitation current 196 increment Time delay from 0 to 100s 18 increment 1 high failure level Range from 0 to 100 of the rated excitation current 1 increment Time delay from 0 to 10s 1s increment 2 10 CONTACTS PARAMETER DATA Dry contacts only for devices equipped with galvanically insulated outputs START excitation start contact STOP excitation stop contact increase setpoint Input contacts Function DOWN decrease setpoint enable par operation with enable VAR PF regulation enable voltage matching FCR enable FCR mode Function Relays individually associated to alarm functions Rated data 1A 120Vac 24Vdc resistive Output relays Max switched voltage 120 0 60 Max switched current 1A Max switched power 120VA 30W SIN NT 023 5 D MarelliGenerators 11 ENGLISH TECHNICAL SPECIFICATIONS MarelliGenerators 2 11 ENVIRONMENT PARAMETER DATA Operating temperature 30 to 706 Storage temperature 40 to 806
36. 1 M Apply to Relay 2 relay 2 assignment flag click on this button to assign the limitation intervention signal to relay 2 5 7 7 Field Protections In Fig 5 7 7 a the field protection parameters configuration area is shown FIELD PROTECTIONS PARAMETER UNIT MIN MAX DATA Field Overcurrent Maximum Current A 15 10 0 Time Delay E 0 10 5 Enable Protection Apply to Relay1 Apply to Relay2 Field Overvoltage Voltage Threshold 0 200 Time Delay E 0 Enable Protection Apply to Relay Apply to Relay2 Fig 5 7 7 a Field Protection Parameter Area Two sets of parameters can be identified Field Overcurrent see Par 3 6 2 Q Q Maximum Current A enter in this field the maximum allowed field current level value 0 to 15A with minimum increase of 0 1A Time Delay s enter in this field the time interval value during which the MEC 100 is authorized to supply the Maximum Current before the activation of the relevant protection 0 to 10s with minimum increase of 0 1s Enable Protection protection activation flag click on this button to activate the field over current protection function Apply to Relay 1 relay 1 assignment flag click on this button to assign the protection intervention signal to relay 1 Apply to Relay 2 relay 2 assignment flag click on this button to assign the protection intervention signal to relay 2 Field Overvoltage see Par 3 6 1 Q
37. 5 7 9 Diode Monitoring In Fig 5 7 9 a the diode monitoring parameters configuration area is shown Four sets of parameters can be identified Low Level see Par 3 6 7 A Maximum Ripple enter in this field the maximum allowed excitation current ripple related to the following Time Delay and expressed in percentage with respect to the generator rated excitation current value 0 to 100 with minimum increase of 1 Q Delay s enter in this field the time interval value during which the MEC 100 is authorized to work at over Maximum Ripple before the activation of the relevant protection 0 to 100s with minimum increase of 1s 55 D MarelliGenerators SIN NT 023 5 53 ENGLISH MEC 100 INTERFACE SYSTEM D MarelliGenerators DIODE MONITORING DEVICE Ih PARAMETER UNIT MIN MAX DATA Low Level Maximum Ripple 0 100 40 Delay s 0 100 10 0 High Level Maximum Ripple 0 100 100 Delay s 0 10 50 Protection Options Enable Monitoring Enable Shutdown Alarm Options Low Level Apply to Relay Apply to Relay2 High Level Apply to Relay Apply to Relay2 Fig 5 7 9 a Diode Monitoring Parameter Area High Level see Par 3 6 7 Maximum Ripple 96 enter in this field the maximum allowed excitation current ripple related to the following Time Delay and expressed in percentage with respect to the generator rated excitation current
38. ETTINGS rr ciue eus ceu i vided nnd Ve APR LOU EE Lv EE RUD ATE Reda 40 5 6 SAVING AND RETRIEVING A SET OF PARAMETERS 41 5 6 1 Saving a Set of Parameters EEEa 41 5 6 2 Loading a Set of 41 5 6 3 Checking a Set of Parameters Off line 42 5 6 4 Printing a Set of 5 42 5 7 DEFINITION OF CONFIGURABLE PARAMETERS ii 43 5 7 11 System Patamlelets iced he Bessere ese these eeu Aaa Fea REL RE HER ORE euis 44 57 45 SRTA e elol EE E E E E 46 S ONET Sellings LEE 48 5 7 5 stability Settings 49 5 7 0 LIMINE iS aiar ee 50 5 7 7 Field Prole ON S e 51 5 7 8 Generator Protections eap ago cua leali 52 5 7 9 Diode MOnitoring ep 53 MarelliGenerators SIN NT 023 5 5 ENGLISH CONTENTS MarelliGenerators 5 8 SYSTEM MONITORING 55 5 8 1 Electrical System Parameters nennen nnren nennt neret rennen etre enne 55 5 8 2 System StAtUs T 55 5 8 3 Status corsia
39. GS Rated Excitation Curent 1 60 M STATUS Voltage Matching R sati Tana na m i active Droop Compensation FIELD PROTECTIONS Parallel with Line o Rated Reactive Power KVAR 20 85 Field Current Regulation FCR GENERATOR PROTECTIQH Anna Power 34 76 Operating Status ALARM DESCRIPTION STATUS System Options Overexcitation Limiter Voltage Sensing C 1 Phase 3Phase Underexcitation Limiter A PF VAR PF C VAR Underfrequency Limiter A Field Overcurrent Protection Aux Analog Input Setting Field Overvoltage Protection A Single operation No 4 2 in Generator Overcurrent Protection A PR operates S No Cn T dn Generator Overvoltage Protection Generator Undervoltage Protection 5 Loss of Sensing Protection Diode Monitoring Low Level 559 Diode Monitoring High Level Fig 5 3 2 a MEC 100 Interface System Work Window The Work Window is composed of the following sections 1 Rating data area shows the generator rating data It does not contain operating data but only the indications which identify the machine the MEC 100 has been configured for 2 System monitoring area displays in real time the values relative to the electrical system data the status of contacts and alarms 3 Generator parameter area set of pages dedicated to the system configuration It includes the fields where to assign the appropriate values to all parameters involved in the syst
40. Limit enter in this field the minimum value which the voltage setpoint can reach expressed in percentage with respect to the machine rated voltage see Par 5 7 1 70 to 100 with minimum increase of 1 A Maximum Limit 96 enter this field the maximum value which the voltage setpoint can reach expressed in percentage with respect to the machine rated voltage see Par 5 7 1 100 to 13095 with minimum increase of 1 If one of the two limits is modified and the actual voltage setpoint is outside the new defined range the setpoint is automatically brought to the just modified limit value Power Factor Setpoint Power Factor Setpoint defines if the power factor setpoint should be inductive or capacitive A Power Factor enter in this field the power factor setpoint you like to keep the minimum leading and minimum lagging limits are set in the following two fields minimum increase of 0 001 Q Leading PF enter in this field the minimum leading value which the power factor setpoint can reach 0 5 to 1 with minimum increase of 0 01 A Lagging PF enter in this field the minimum lagging value which the power factor setpoint can reach 0 5 to 1 with minimum increase of 0 01 If one of the two limits is modified and the current power factor setpoint is outside the new defined range the setpoint is automatically brought to the just modified limit value Reactive Power Setpoint Reactive Power enter in th
41. MarelliGenerators 60 SIN NT 023 5 SET UP PROCEDURE Sensing Window MarelliGenerators 2 2 ENGLISH Generator VT Primary Voltage V enter the primary SENSING voltage value of the TV used otherwise the generator n c MM MN rated voltage 100 to 22000V with minimum increase Generator VT of 1V z Generator VT Secondary Voltage V the secondary voltage value of the TV used otherwise the generator 8222792 40 rated voltage 100 to 500 with minimum increase of Line VT 1 V Primary Voltage V 100 22000 400 Secondary Voltage V 100 500 400 Line VT Primary Voltage V enter the primary voltage Generator CT value of the TV used otherwise the line network rated Primary Current 10000 500 voltage 100 to 22000V with minimum increase of 1V Secondary Current A 1 5 Line VT Primary Voltage V the secondary voltage value of the TV if used otherwise the line network Adjustments rated voltage 100 to 500V with minimum increase of Generator VT Ratio 93 15 1006 1V Line VT Ratio X s 105 1029 Generator CT Primary Current V A enter the a 6 primary current value of the CT used 1 to 10000 with aT T minimum increase of 1A Generator CT Primary Current A select in this field the secondary curr
42. ON SET TO THE MEC 100 WHEN THIS LAST IS COMMUNICATING WITH THE OPERATING GENERATOR Perform the above mentioned operations to apply a configuration set to the MEC 100 regulating the generator involves a regulation setting alteration it could be dangerous if the system parameters are not properly set for the application Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to a not allowed setting of the MEC 100 IT IS ALWAYS ADVISABLE TO LOAD A NEW CONFIGURATION FILE WHEN THE MEC 100 IS NOT REGULATING THE GENERATOR SEE SECTION 6 D MarelliGenerators SIN NT 023 5 41 ENGLISH MEC 100 INTERFACE SYSTEM MarelliGenerators 5 6 3 Checking a Set of Parameters Off line TO DO To check a whole set of parameters without applying to MEC 100 Interrupt the connection to the MEC 100 see Par 5 3 3 Click the Database button in the menu bar of the MEC 100 Interface System see Fig 5 6 3 a 7 MEC 100 Interface System 80218 18558 Tools Help Open Parameter File Off line Open and Apply Parameter File On line In the displayed pull down menu point to the Open Parameter Save Parameter File On line Gene File Off line item and click Exit R n the File Manager window select the directory where the file Open Comm RATED VOLTAGE to load is stored select it and click
43. PF VAR contacts are opened When the VMATCH contact is closed and both the PAR and PF VAR contacts are disabled the LED corresponding to the Voltage Matching item in the system status window in System Monitoring see Par 5 8 2 becomes green 3 5 8 FCR C8 Contact except for M71FA300A model FCR enabling contact normally open switch logic this input enables the FCR Mode for excitation current regulation Field Current Regulation see Par 3 4 4 FCR Mode can be automatically selected in case of loss of sensing and Shutdown Mode enabled see Par 5 7 8 and it does not depend on the status of FCR contact When the FCR function is operating the LED corresponding to the Field Current Regulation FCR item in the system status window in System Monitoring see Par 5 8 2 becomes green AN WARNING BE CAREFUL IN THE USE OF THE FCR MODE The excitation current value in FCR mode must be chosen considering the generator specifications and the operations to do a too high excitation current value can lead to over excitation and or overvoltage conditions dangerous for the generator and or the plant incautious use A initial low value is suggested not higher than the excitation current in no load condition Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to an incautious use of FCR mode 3 5 9 RESET C8 Contact
44. Par 5 8 2 becomes green WARNING CONTACT MUST ALWAYS BE TURNED OFF C5 OPEN BEFORE STOPPING THE GENERATOR 16 MarelliGenerators SIN NT 023 5 FUNCTIONAL DESCRIPTION ENGLISH D MarelliGenerators 3 5 6 PF VAR C6 Contact PF VAR Mode enabling contact normally open switch logic this input activates the PF Power Factor or VAR Reactive Power regulation Mode depending on the previously selected Mode see Par 5 7 1 for the mains parallel operations When this contact is closed the excitation limiters provided for the operating mode in parallel are enabled and the voltage matching function is disabled see Par 3 5 7 When the PF VAR contact is closed the LED corresponding to the Parallel with Line item in the system status window in System Monitoring see Par 5 8 2 becomes green 3 5 7 VMATCH C7 Contact Voltage matching enabling contact normally open switch logic this input enables the voltage matching function from the MEC 100 if the network voltage value measured by the MEC 100 is included in the range of set values values referred to the generator rated voltage see Par 5 7 4 the generator voltage setpoint is automatically modified from the pre established value to the network voltage value in a fixed time interval of 10 15 seconds approximately When the PAR or the PF VAR contact is closed the voltage matching function is disabled and remains disabled until both the PAR and
45. R FIELD PARAMETER Available inputs 2 channels Range 4 to 20 mAdc DATA Field resistance Minimum value 20 Continuative operation Current range 0 to 10 Adc Voltage range 0 to 60 10 seconds forcing operation 2 7 ACCURACY Current range 0 to 20 Adc Voltage range 0 to 120 Vdc PARAMETER DATA Voltage regulation 0 25 over load range at rated power factor and accuracy constant generator frequency AVR Mode Steady state stability 0 1 at constant load and generator frequency Thermal drift 0 5 for a 30 change in 10 minutes V Hz voltage accuracy 2 Response time lt 1 cycle FCR Mode Accuracy 2 PF Mode Accuracy 2 VAR Mode Accuracy 2 Voltage matchin Accurac 0 5 2 8 LIMITERS AND OTHER FUNCTIONS 10 PARAMETER DATA Soft start Time adjust range 1 to 36005 1s increment Voltage matching Minimum threshold 90 to 100 of the rated generator voltage 1 increment Maximum threshold 100 to 110 of the rated generator voltage 1 increment Parallel operation Type Reactive droop compensation Range 0 to 10 Over excitation limiter Type Inverse time curve Thresholds Dd Dd 2 1 maximum threshold Range from 0 to 25A 0 1A increment Time delay from 0 t
46. S 232 Serial port or USB port 5 2 2 Installing the MEC 100 Interface System Gey TO DO To install the MEC 100 Interface System in the PC you must Insert the CD ROM disk provided with the MEC 100 into the PC CD ROM drive When the installation menu appears click the Install button the set up utility of the MEC 100 Interface System will install automatically the software Follow the instructions which appear on the PC screen 5 2 3 Starting the Program 3 TO DO To start the MEC 100 Interface System you must Click the Windows Start button Select Programs Point to the MarelliMotori directory Select the MEC 100 Interface System icon 2 Follow the instructions which appear the start menu MarelliGenerators SIN NT 023 5 35 ENGLISH MEC 100 INTERFACE SYSTEM D MarelliGenerators 5 2 4 Uninstalling the MEC 100 Interface System TO DO To uninstall the 100 Interface System from your PC you must Open the Windows File Manager Select the MEC 100 Interface System installation folder Double click on unins000 exe file Follow the instructions which appear on the PC screen 5 2 5 Connection Between MEC 100 and PC Connect a serial communication cable to the MEC 100 RS 232 connector and to the relevant PC communication port The MEC 100 RS 232 connector is located in the top of the device see Par 4 3 5 3 START UP 5 3 1 Acceptance of the General Contract Conditions T
47. SYSTEM ENGLISH MarelliGenerators 5 8 SYSTEM MONITORING The MEC 100 allows to display on a real time basis the value taken by the main electrical system parameters and the status of inputs and outputs The section of the MEC 100 Interface System dedicated to the system monitoring is that identified by the label 2 as shown in Figure 5 3 2 a It consists of six monitoring areas which are described here below 5 8 1 Electrical System Parameters In Fig 5 8 1 a the system parameters monitoring area is shown It allows to measure in real time 9 The three phase to phase voltages The current in the sensed phase The generator electrical frequency Excitation current and voltage Network frequency and voltage Real reactive and apparent powers The power factor In the last column the units of measurement of the measured electrical parameters are defined 10 gn dn 5 8 2 System Status In Fig 5 8 2 a the system status monitoring area is shown It allows to display in real time The status of the voltage matching The status of the generators or the network parallel The status of the FCR Mode The excitation status of the system In the last column each one of the illuminated LEDs identifies the relevant active function see the description of contacts in Par 3 5 5 8 3 Alarm Status In Fig 5 8 3 a the alarm status monitoring area is
48. User Manual English MARELLI ENERGY CONTROLLER MEC 100 Regulation System for Three phase Synchronous Generators SIN NT 023 5 ENG MarelliGenerators This page is intentionally blank PRELIMINARY INSTRUCTIONS ENGLISH MarelliGenerators This Manual provides information about installation and operation of MEC 100 Regulation System It deals extensively with the following subjects 2 2 2 2 General information Technical specifications Functional description Installation MEC 100 Interface System MEC 100 Interface System setting procedure Warranty After Sales Service and Maintenance Several operations described in this manual are preceded by recommendations or symbols which alert about possible risks of accidents It is therefore important to understand the following symbols Refers to operations which may cause damage to the product accessories or to the components connected to the same It also refers to procedures and operations which may cause serious injury or death to persons Refers to immediate electrical dangers which may cause the death of persons WARNING It is not the intention of this manual to cover all installation or connection diagram variations nor does this manual provide information for every possible contingency Only the technical information provided by Marelli Motori s Technical Personnel can integra
49. achine Interface NI SNES lt lt lt TSE lt lt lt lt lt lt lt lt lt lt lt lt SI lt lt lt lt lt lt lt lt lt 44 lt lt Example to order a MEC 100 with diode monitoring the following model must be required MEC 100 D M71FA320A D MarelliGenerators SIN NT 023 5 TECHNICAL SPECIFICATIONS ENGLISH MarelliGenerators 2 TECHNICAL SPECIFICATIONS 2 1 SUPPLY AND POWER PARAMETER DATA Single phase Three phase Auxiliary winding Mains PMG External supply AC 50 to 277Vac 50 to 400Hz DC 60 to 400Vdc Voltage build up gt 5Vac Connection type Supply type Supply voltage type 2 2 GENERATOR VOLTAGE SENSING PARAMETER DATA Connection type Single phase Three phase Voltage Range From 100Vac to 500Vac at 50 60Hz 2 3 NETWORK VOLTAGE SENSING PARAMETER DATA Connection type Single phase Voltage Range From 100Vac to 500Vac at 50 60Hz 2 4 GENERATOR CURRENT SENSING PARAMETER DATA Available inputs 1 channel with 2 available ranges 1Aac 50 60Hz 5Aac 50 60Hz Generator current sensing on W phase Current range n SIN NT 023 5 9 ENGLISH TECHNICAL SPECIFICATIONS MarelliGenerators 2 5 ANALOGUE AUXILIARY INPUTS PARAMETER DATA Auxiliary inputs 2 6 EXCITE
50. age setpoint PF Mode if the power factor setpoint is of inductive type decreases the power factor if the setpoint is of capacitive type increases the power factor Mode increases the reactive power setpoint FCR Mode increases the excitation current setpoint The setpoint increase is strictly related to the range established for the setpoint see Par 5 7 3 and the variation speed or traverse rate see Par 5 7 4 It is assumed that the inductive reactive power is of positive sign and the capacitive reactive power of negative sign In parallel with the network PF Mode or VAR Mode active the UP contact increases the reactive power value so as to obtain the desired power factor or reactive power setpoint depending on the selected regulation Mode WARNING THE UP CONTACT NOT BE USED FOR ENDLESS REPETITIVE PURPOSES The UP contact can only perform a current setpoint change for spot operations the endless repetitive use of the contact is forbidden If a continuous setpoint matching is required the auxiliary analogue inputs E1 E2 M must always be used see Par 3 4 4 3 5 4 DOWN C4 Contact Active operational setpoint decreasing contact normally open momentary pushbutton logic AVR Mode decreases the generator voltage setpoint PF Mode if the power factor setpoint is of inductive type increases the power factor if the setpoint is of capacitive type decreases the power factor Mo
51. arelliGenerators SIN NT 023 5 MEC 100 INTERFACE SYSTEM ir i D MarelliGenerators ENGLISH 5 4 PASSWORD MANAGEMENT After starting the MEC 100 Interface System and establishing the connection the System Monitoring section is operative and shows the value of the regulation system electrical quantities on a real time basis In the System Parameters section the values of the system parameters stored in the MEC 100 are displayed they can correspond to the default values in case of first configuration or to those saved during a previous configuration operation Immediately after establishing the connection to the MEC 100 or after 5 minutes from the last use of the MEC 100 Interface System the System Parameters section appears to be write protected it is therefore necessary to remove the write protection by entering a password Here below the password management modes for the MEC 100 Interface System are described 5 4 1 Entering Password TO DO To remove the write protection of the MEC 100 Interface System and enter the password 2 2 2 Click on the Enter Password button placed at the left bottom of the main screen see Fig 5 4 1 a Enter the password in the field of the displayed window see Fig 5 4 1 b The default password is Marelli Click Apply 5 4 2 Changing Password 2 2 TW I D MarelliGenerators TO DO To modify the password Click on
52. can be selected by the relevant button in the frame indicated with 6 in Fig 5 3 2 a After selecting one of the categories the corresponding set of parameters is displayed If connected to the MEC 100 see Par 5 3 3 the above mentioned set of parameters can also be configured A parameter can be configured by clicking in the appropriate field and typing the desired value or selecting the desired option In any field you can only enter values falling within determined limits established on the basis of the parameter type the particular application and the other set parameters The limits are normally indicated next to the name of the parameter to be configured If you try to enter a value outside the allowed range a red exclamation mark will appear next to the entered item After configuring a group of parameters you need to send the entered data to the MEC 100 before switching to the next group otherwise the typed data will be lost ug EXCITATION VOLTAGE VA Down ATION CURRENT TO DO EXCIT To configure the MEC 100 that is to enter the desired GENERATOR PARAMET values for the system parameters you must SYSTEM PARAMET Connect to the MEC 100 see Par 5 3 3 Enter la password if required see Par 5 4 1 parameters a tota 7 Select the desired group of data see Fig 5 5 a SENSING LL Click in the field to modify and enter the desired value Repeat the operation for each
53. cording to the provided connection diagrams or supplied from an external supplier It is always advisable to supply the MEC 100 with the minimum voltage values included into the allowed supply voltage range see Par 2 1 It is strongly recommended to not supply MEC 100 with voltage values gt 220Vac See the Set up Procedure widely described in Section 6 AA WARNING Before doing any operations and or any set up on MEC 100 is to be taken into consideration that lethal voltage is present at the top panel when the unit is energized Top panel connections and or operations should be made only when the unit is de energized 4 4 IMPORTANT NOTES CONCERNING CONNECTIONS RESTRICTIONS The MEC 100 is equipped with an RS 232 serial port located on the card component side it consists of a DB 9 female connector AN WARNING For all the applications with MEC 100 the CONNECTIONS MUST ALWAYS COMPLY WITH THE MARELLI CONNECTION DIAGRAMS provided with the generator If included in the Marelli connection diagrams the DE EXCITATION SHUTDOWN CONTACT MUST ALWAYS BE USED see instructions in Par 3 12 ALL TYPES OF SWITCH OR OTHER DEVICE not formally included in the Marelli connection diagrams CAN NOT BE USED AND OR PUT on the MEC 100 output and or exciter field without previous authorization of Marelli Motori S p A skilled personnel Should further information about the connection diagrams and or the used components be required Marelli Service s
54. d by applying a 4 20mA current and they can be individually associated to two regulation Modes To the control current range corresponds the range established during set up for the relative associated setpoint see Par 5 7 3 For example if voltage setpoint limits are set to 80 and 12096 of the generator rated voltage 4mA will be associated to the minimum limit 80 and 20mA to the maximum limit 120 and all the intermediate values of the generator voltage setpoint will proportionally correspond to the current values between 4 and 20 AN WARNING THESE INPUTS ARE NOT INTERNALLY INSULATED The external device to which these inputs should be connected must be equipped with a galvanically insulated output Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to no insulation between MEC 100 and other external device connected to these inputs MarelliGenerators SIN NT 023 5 FUNCTIONAL DESCRIPTION ENGLISH D MarelliGenerators 3 5 INPUT CONTACTS The MEC 100 is equipped with 8 input contacts for the operational control of the regulation modes Here below the description of the functions related to these contacts is provided AN WARNING THESE INPUTS ARE NOT INTERNALLY INSULATED The external device to which these inputs should be connected must be equipped with a galvanically insulated output Marelli
55. de decreases the reactive power setpoint FCR Mode decreases the excitation current setpoint The setpoint decrease is strictly related to the range established for the setpoint see Par 5 7 3 and the variation speed traverse rate see Par 5 7 4 It is assumed that the inductive reactive power is of positive sign and the capacitive reactive power of negative sign In parallel with the network PF Mode or VAR Mode active the DOWN contact decreases the reactive power value so as to obtain the desired power factor or reactive power setpoint depending on the selected regulation Mode AN WARNING THE DOWN CONTACT CAN NOT BE USED FOR ENDLESS REPETITIVE PURPOSES The DOWN contact can only perform a current setpoint change for spot operations the endless repetitive use of the contact is forbidden If a continuous setpoint matching is required the auxiliary analogue inputs E1 E2 M must always be used see Par 3 4 4 3 5 5 PAR C5 Contact Generators parallel enabling contact normally open switch logic this input activates the Droop mode for paralleling one or more generators for the Droop function see Par 3 9 When this contact is closed the excitation limiters provided for the operating mode in parallel are enabled and the voltage matching function is disabled see Par 3 5 7 When the PAR contact is closed the LED corresponding to the Reactive Droop Compensation item in the system status window in System Monitoring see
56. e manual file with the desired language Installing the MEC 100 Interface System To install the MEC 100 Interface System in the PC refer to Par 5 2 Commissioning Warnings WARNING Unless prior agreement has been made with Marelli Motori the initial start up of a plant with MEC 100 regulation unit MUST be always conducted by Marelli Motori personnel strictly in accordance with the provided connection diagrams Any amendments to such diagrams must be either made or approved by Marelli Motori Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to either a start up not performed by a Marelli Motori s skilled personnel and diagrams modifications not carried out or previously approved by Marelli Motori itself WARNING Before doing any operations and or any set up on MEC 100 is to be taken into consideration that lethal voltage is present at the top panel when the unit is energized Top panel connections and or operations with or without tools should be made only when the unit is de energized Should further information be required please contact MarelliService AFTER MARKET DEPARTMENT MARELLI MOTORI S p A Tel 39 0444 479 775 Fax 39 0444 479 757 E mail service marellimotori com Web www marellimotori com MarelliGenerators iv SIN NT 023 5 PRELIMINARY INSTRUCTIONS ENGLISH Mar
57. ease of 0 19 D MarelliGenerators SIN NT 023 5 61 ENGLISH SET UP PROCEDURE D MarelliGenerators System Parameters Window Gey TO DO Generator Data Rated Voltage V enter the generator SYSTEM PARAMETERS rated voltage value phase phase MIRO sn Generator Data Rated Current A enter the generator Generator Data rated current value Rated Voltage 4000 Generator Data Rated Power Factor enter the Rated Current hi si generator rated power factor value Rated Power Factor 0 800 Generator Data Rated Frequency Hz enter the Rated FISQuericy nomm sona generator rated frequency value Rated Excitation Current x 1 60 Generator Data Rated Excitation Current A enter the generator rated excitation current value Rated Real Power kw 2781 Rated Reactive Power 20 85 System Options Voltage Sensing select the desired sensing mode System Options PF VAR select the desired regulazion System Options Rated Apparent Power mode during parallel operations C 1 Phase 3Phase FF VaR Aux Analog Input Setting Single Operation select the anlaog input to which associate the setpoint during Sa TU UE FU single operation Aux Analog Input Setting Parallel Operation select SS the anlaog input to which associate the setpoint during parallel operation The two analog input are curre
58. ection Button TO DO To select a PC communication port other than the default execute the following operations Click on the Tools item the menu bar of the MEC 100 Interface System see Fig 5 3 3 b In the displayed pull down menu select the Port Configuration item 2 A window see Fig 5 3 3 c appears where the desired communication port be selected MEC 100 Interface System 7 MEC 100 Interface System Database MEAS Help Modify Password Language SERIAL NUMBER Open Comm RATED VOLTAGE RATED CURRENT RATED POWER FACTOR Fig 5 3 3 b Fig 5 3 3 c Communication Port Setting Communication Port Selection After establishing the connection the MEC 100 Interface System configuration parameters initially set to zero by default are automatically updated to the values saved in the MEC 100 these last can correspond to the default values if the regulator is set for the first time or to those stored in the in case of previously performed configuration operations The communication initialization and the update of the regulation system parameters may take a few seconds In view of the correct execution of such operations it is recommended to wait until they are completed before entering any data It is possible to set the MEC 100 regulation parameters only if MEC 100 is properly supplied as described in Par 2 1 For preliminary set up see Par 7 2 M
59. ection item flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays This function can be enabled disabled 3 6 6 Loss of Sensing Protection The MEC 100 is capable of sensing the over excitation conditions resulting from the loss of voltage sensing and coming into operation by a warning signal in less than 1s The activation of this protection is accompanied by a visual warning in the MEC 100 Interface System Loss of Sensing Protection item flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays The Loss of Sensing protection can directly operate one of the two following actions preliminary choice is required see Par 5 7 8 Shutdown the MEC 100 operates the instantaneous de excitation shutdown of the generator FCR the MEC 100 automatically changes over to FCR mode supplying the excitation current value set in the Setpoint window see Par 5 7 3 D MarelliGenerators SIN NT 023 5 19 ENGLISH FUNCTIONAL DESCRIPTION 20 MarelliGenerators This function can be enabled disabled A WARNING Any activation of the protection when it is enabled will cause an excitation shutdown or a change over to the FCR mode Before enabling the protection please make sure that the choosen protection option is not dangerous for the plant or the network to which the generator is connected Marelli Motori is under no liability for an
60. ee Par 7 3 must always be contacted and or involved BEFORE the MEC 100 commissioning A WARNING if the MEC 100 application environment is affected by electromagnetic 28 disturbance EMI higher than the specific limits described in Par Errore L origine riferimento non stata trovata the User must equip the MEC 100 system of the the proper and suitable protections shielded cables ferrites etc on his own EMI out of specifications can lead to unproper working of MEC 100 and or to hardware damages Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to missing application of EMI protections Should further information about the EMI protection of the system be required Marelli Service see Par 7 3 must always be contacted and or involved BEFORE the MEC 100 commissioning D MarelliGenerators SIN NT 023 5 INSTALLATION SIN NT 023 5 D MarelliGenerators ENGLISH 353
61. elliGenerators 4 5 3 Power Supply from Main Terminals Low Voltage 2 phases must always be Relay 1 connected to S1 and S2 If the voltage sensing connection is single phase type S3 is not used All contact terminals Relay 2 can be associated to each M terminal When U connected to S1 and connected to 2 current sensing Analogue must be on W phase auxiliary For M71FA300A C8 contact inputs is RESET not FCR tr START TO LOAD sT0P UP VW rm Network VT MARELLI ENERGY CONTROLLER MEC 100 Current sensing CT Y E 142 N lt E g N Exciter field S Generator U Supply by mains U De excitation contact U D MarelliGenerators SIN NT 023 5 33 ENGLISH INSTALLATION D MarelliGenerators 4 5 4 Power Supply from Main Terminals Medium Voltage U and V phases must always be Relay 1 connected to S1 and S2 If the voltage sensing connection is single phase type S3 is not used All contact terminals Relay 2 can be associated to each M terminal When U connected to S1 and V connected to S2 current sensing Analogue must be on W phase auxiliary For M71FA300A C8 contact inputs is RESET not FCR N Ir rm N rt S LOAD UP Network VT PF VAR VMATCH DEO Q Q e MARELLI ENERGY CONTROLLER
62. elliGenerators REVISION HISTORY The following tables are the lists of hardware firmware software and manual revisions of the MEC 100 listed in chronological order Part Number M71FA300A Version Date Change 1 series 07 07 Initial release Hardware 274 series 09 07 Revised current sensing 3 series 09 08 Revised surge suppressors 1 01 07 07 Initial release 1 02 10 07 Improvements to Underfrequency Limiter options Firmware 1 03 08 08 Improvements to transient performances from parallel operation to single unit operation 1 04 09 08 Decreased time delay of contact PF VAR 1 05 10 08 Reviewed START contact 1 0 v5 07 07 Initial release Software 1 0 v6 09 07 Added Italian and English language User Manuals 1 0 v7 11 07 Added auxiliary input display 1 0 v8 03 08 Revised English language version Part Number M71FA310A M71FA320A Version Change Hardware 3 serie Initial release Firmware 2 00 Initial release 3 0 v2 Initial release Software 3 0 v3 Revised printing tools MEC 100 Series Manuals Version Change Rev 0 Initial release Rev 1 Revision 0 corrections m Added user instructions of the De excitation Contact with MEC 100 Rev 2 Revision 1 corrections Rev 3 Revision 2 corrections Rev 4 Added Diode Monitoring Function and Field Current Regulation Mode Additional installation instructions De excitation Shutdown c
63. em configuration The parameters are grouped by type in 9 Categories system data sensing setpoints and other settings stability limitation parameters protections field and generator diode monitoring MarelliGenerators SIN NT 023 5 37 ENGLISH 5 38 100 INTERFACE SYSTEM MarelliGenerators 4 MEC 100 PC communication area area for the management of the communication between MEC 100 and PC It shows in real time the communication status Setpoint variation buttons tools for the modification of the controlled quantity setpoint voltage power factor or reactive power depending on the actual operating mode Group selection area frame to select the desired configuration window Oscillographic tracing of a system quantity Electrical system parameter monitoring System status window 0 Alarm window 5 3 3 Establishing a Communication Link Before configuring or monitoring the regulation system parameters you must establish a communication link between MEC 100 and MEC 100 Interface System TO DO To establish a communication link between MEC 100 and MEC 100 Interface System you must Verify that the connection between MEC 100 and Personal Computer has been established as described in Par 5 2 5 Start the MEC 100 Interface System software as described Open Comm OFF LINE in Par 5 3 1 Click on the Open Comm button as shown in Fig 5 3 3 a Fig 5 3 3 a Conn
64. ent value of the TA used by choosing between the two standard values 1A and 5A Adjustment Generator VT Ratio if the MEC 100 Interface System senses and displays a generator voltage value higher of a given percentage than the actual value you need to add this percentage to the percentage already entered in the field 100 of default to obtain a correct and accurate sensing calibration 95 to 105 with minimum increase of 0 1 Adjustment Line VT Ratio if the MEC 100 Interface System senses and displays a network voltage value higher of a given percentage than the actual value you need to add this percentage to the percentage already entered in the field 100 of default to obtain a correct and accurate sensing calibration 95 to 105 with minimum increase of 0 1 Adjustment Generator CT Ratio if the MEC 100 Interface System senses and displays a generator current value higher of a given percentage than the actual value you need to add this percentage to the percentage already entered in the field 100 of default to obtain a correct and accurate sensing calibration 95 to 105 with minimum increase of 0 1 Adjustment Phase Compensation degrees if the MEC 100 Interface System senses and displays a power factor value higher or lower than the actual value you need to introduce a compensation angle 0 default value to obtain a correct and accurate power factor measurement 10 to 109 with minimum incr
65. ercentage with respect to the rated excitation current 0 to 100 with minimum increase of 1 A Maximum Limit 95 enter in this field the maximum value which the excitation current setpoint can reach expressed in percentage with respect to the rated excitation current 1 to 120 with minimum increase of 1 AN PAY PARTICULAR ATTENTION TO THE SELECTION AND OR MODIFICATION OF THE SETPOINT VALUES The limit thresholds set by the MEC 100 Interface System to the setpoint values do not protect against the selection of setpoints which may be potentially dangerous for devices and or installations connected to the generator In all configuration operations of the MEC 100 Interface System always check that the new setpoints to be entered are appropriate to the devices and or installations connected to the generator Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to a wrong setpoint setting D MarelliGenerators SIN NT 023 5 47 ENGLISH 48 MEC 100 INTERFACE SYSTEM MarelliGenerators 5 7 4 Other Settings In Fig 5 7 4 a the configuration area relative to other functions is shown OTHER SETTINGS PARAMETER UNIT MIN MAX DATA Soft Start Soft start time s 1 3600 10 Traverse rate Voltage Kis Ds Power Factor 00 1 10 1 Reactive Power 5
66. feguarding of ay the environnement Ce manuel est imprim sur papier recycl une contribution de MarelliMotori pour la sauvegarde de l environnement Dieses Handbuch ist auf wiederverwertbarem Umweltpapier gedruckt Ein Beitrag von Marelli Motori zum Schutz der Natur Este manual ha sido impreso en papel reciclado una contribuci n de MarelliMotori para la salvaguardia del medio ambiente 5 3 I MarelliGenerators VarelliMotori Marelli Motori S p a Via Sabbionara 1 36071 Arzignano VI Italy T 39 0444 479711 39 0444 479888 www marellimotori com sales marellimotori com MarelliService T 39 0444 479775 39 0444 479757 service marellimotori com aie e e e MarelliMotori overseas offices GREAT BRITAIN CENTRAL EUROPE USA ASIA PACIFIC SOUTH AFRICA Marelli UK Ltd Marelli Central Europe Gmbh Marelli USA Inc Marelli Asia Pacific Sdn Bhd Marelli Electrical Machines South Africa Pty Ltd Meadow Lane Heilswannenweg 50 1620 Danville Road Lot 7 Jalan Majistret U1 26 Unit 4 55 Activia Rd Activia Park Loughborough 31008 Elze Germany PO Box 410 Harrodsburg Hicom Glenmarie Industrial Park Elandsfontein 1406 Leicester T 49 5068 462 400 KY 40330 USA 40150 Shah Alam Gauteng Republic of South Africa LE 11 1NB UK F 49 5068 462 409 T 1 859 734 2588 Selangor D E Malaysia T 27 11 822 5566 T 44 1509 615518 germany marellimotori com F 1 859
67. g when the current value exceeds a predefined limit for a pre established time interval this time interval can be derived from a curve of the type shown in Fig 3 6 5 a All of that before the over current causes a generator overheating failure a Current Reference Level Generator Current A Operation Time Delay ry Time s Fig 3 6 5 a Generator Over current Protection Curve The characteristic curve is calculated starting from the determination of a maximum continuative current level given in percentage compared with the generator rated current value with values included between 0 and 110 and minimum increase of 1 a current reference level expressed in percentage compared with the generator rated current value with values included between 0 and 120 and minimum increase of 1 and a minimum operation time value time delay from 0 to 3600s minimum increase of 1s associated to the reference level When the stator current value exceeds the maximum continuous current value the generator over current protection is activated by a warning signal after a time interval depending on the generator current value which has been reached according to the curve of Fig 3 6 5 a Higher the over current shorter the operation time time delay The activation of this protection is accompanied by a visual warning in the MEC 100 Interface System Generator Overcurrent Prot
68. ge of some auxiliary system chs parameters is shown Mareli enera The internal MEC 100 bus voltage Analogue Auxiliary Input 1 current value mA Ej Analogue Auxiliary Input 2 current value MA A Excitation Current Ripple 96 Power Factor F 1 0 This graphical area can be selected or de selected by Other parameters clicking the selection flag A indicator as shown in Fig Bus Voltage fa 169 v Analog Input 1 oO 0 0 ma 5 8 4 a Analog Input 2 65 0 0 m Excit Current Ripple 7 Firmware Release 2 01 Cad Type MEC 100 DM Fig 5 8 4 a Auxiliary Parameter Display 5 8 5 Phase Graphical Display In Fig 5 8 5 a an image of the graphical display relative to the angle deviation between generator voltage and current is shown Moreover it allows to display the numerical values of A Phase Degrees Sing Cosq Fig 5 8 5 a Phase Graphical Display 5 8 6 Oscillographic Display In Fig 5 8 6 a an image of the oscillographic indicator relative to the electrical system parameters V is shown t 400 jl so 0 PARAMETER Generator Voltage U V NOU Generator Voltage U W i 400 0 C Generator Voltage V W i gt 399 6 In the figure the three areas concerned by the use of Generator W 0 this functions can be identified Generator Frequency 50 0 Selection of the electrical parameter to be Excitation Voltage 107 Excitation
69. he first configuration step see Par 5 7 1 In the PF Mode also the Under excitation Limiter is active see Par 3 7 3 3 3 3 VAR Reactive Power Regulation Mode In this operating mode the MEC 100 allows to adjust the reactive power The activation of the VAR Mode is obtained by closing the PF VAR input contact C6 contact see Par 3 5 6 after enabling the same mode during the first configuration step see Par 5 7 1 In the VAR Mode also the Under excitation Limiter function is active see Par 3 7 3 MarelliGenerators 5 5 SIN NT 023 5 13 ENGLISH FUNCTIONAL DESCRIPTION MarelliGenerators 3 3 4 FCR Field Current Regulation Mode In this operating mode the MEC 100 allows to adjust the excitation current The activation of the FCR Mode can be obtained by closing the FCR input contact C8 contact see Par 3 5 8 3 4 ANALOGUE INPUTS S1 S2 S3 14 3 4 1 Generator Voltage Sensing The MEC 100 offers a wide range of measurement for the generator voltage You can connect the three sensing terminals S1 S2 S3 directly to the main machine terminals for the following range from 100Vac to 500Vac at 50 60Hz frequencies see Par 2 2 For applications with rated generator voltages higher than 500V you need to interpose a step down transformer with rated secondary voltage included in the ranges indicated in the relevant specifications For the sensing both the single phase and three phase connection co
70. ick to activate the generator over voltage protection function Generator Overvoltage Apply to Relay 1 click to assign the protection intervention signal to relay 1 Generator Overvoltage Apply to Relay 2 click to assign the protection intervention signal to relay 2 MarelliGenerators SIN NT 023 5 SET UP PROCEDURE ENGLISH D MarelliGenerators Generator Undervoltage Voltage Threshold enter the minimum generator voltage expressed in percentage with respect to the generator rated voltage value 0 to 100 with minimum increase of 1 Generator Undervoltage Time Delay s enter the time delay 0 to 300s with minimum increase of 1s Generator Undervoltage Enable Protection click to activate the generator undervoltage protection function Generator Undervoltage Apply to Relay 1 click to assign the protection intervention signal to relay 1 Generator Undervoltage Apply to Relay 2 click to assign the protection intervention signal to relay 2 Loss of Sensing Enable Protection click to activate the loss of sensing protection function Loss of Sensing Apply to Relay 1 click to assign the protection intervention signal to relay 1 Loss of Sensing Apply to Relay 2 click to assign the protection intervention signal to relay 2 Loss of Sensing Shutdown FCR select the desired intervention mode If Shutdown is selected an instantaneous de excitation of the generator will be operated when the loss of sensing occurs
71. in percentage with respect to the generator rated current value 0 to 110 with minimum increase of 196 Generator Overcurrent Time Delay s enter the time delay during which the MEC 100 is authorized to supply the Maximum Current 0 to 3600s with minimum increase of 1s Generator Overcurrent Apply to Relay 1 click to assign the protection intervention signal to relay 1 Generator Overcurrent Apply to Relay 2 click to assign the protection intervention signal to relay 2 Generator Overvoltage Voltage Threshold enter the maximum generator voltage expressed GENERATOR PROTECTIONS PARAMETER UNIT MIN MAX DATA Generator Overcurrent Maximum Current 110 100 0 3600 2 Apply to Maximum Continuative Current 0 Time Delay s Enable Protection Apply to Relay2 Generator Overvoltage Voltage Threshold 100 Time Delay s 0 150 112 12 Apply to Relayl Enable Protection Apply to Relay2 Generator Undervoltage Enable Protection Apply to Relay Apply to Relay2 Loss of Sensing Enable Protection Shutdown C FCR Apply to Relay Apply to Relay2 percentage with respect to the generator rated voltage value 100 to 150 with minimum increase of 1 Generator Overvoltage Time Delay s enter the time delay 0 to 300s with minimum increase of 1s Generator Overvoltage Enable Protection cl
72. inal ES When U connected to S1 and V connected to S2 current sensing JJ must be W phase Analogue auxiliary For M71FA300A C8 contact inputs is RESET not FCR START TO LOAD Network VT PAR PF VAR MARELLI ENERGY CONTROLLER 2277 100 FCR Current i sensing CT N Generator VT Generator Exciter Field o M Auxili De excitation m contact N U ev D MarelliGenerators SIN NT 023 5 31 ENGLISH INSTALLATION MarelliGenerators 4 5 2 Power Supply from PMG Permanent Magnet Generator Uand V phases must always be connected to S1 and S2 Relay 1 If the voltage sensing connection is single phase type S3 is not used contact terminals 2 to each M terminal When U connected to 51 and V connected to S2 current sensing Analogue must be on W phase auxiliary For M71FA300A C8 contact inputs is RESET not FCR START TO LOAD STOP m P UVW u DOWN Network VT PAR PF VAR MARELLI ENERGY CONTROLLER VMATCH MEC 100 FCR Current sensing CT Generator VT Generator Exciter field l gt De excitation contact MarelliGenerators 32 SIN NT 023 5 INSTALLATION ENGLISH D Mar
73. is Marelli Click Apply change the password see Par 5 4 2 MEC 100 Interface System X Enter Password Enter Password 0 Cancel Fig 6 5 a Fig 6 5 b Enter Password Button Password Entry 6 6 CONFIGURE THE SYSTEM SETTING TO DO sex Y EXCITATION VOLTAGE To carry out the complete MEC 100 set up by means of MEC ti MEA EXCITATION CURRENT 100 Interface System read carefully the following instructions GENERATOR Remember that all parameters are divided by type in 9 groups SYSTEM PARAMET each group associated to a setting window The window LLL selection is achievable by clicking on one of the nine items of SYSTEM PARAMETERS Generator Data the selection frame shown in 6 6 a SENSING As the set up is obtained window by window parameters set SETPOINT 2 other windows could be not consistent with the ones just She entered high lined red point Please respect the order of the following instructions in order a eee to get the total proper settup of MEC 100 RaedRedPowr KW Please check alla the entered parameters before using the HELD PROTECTIONS Rated Reactive Power M EC 1 00 GENERATOR PROTECTIONS Rated Apparent Power kVA DIODE MONITORING Voltage Sensing 1 Phase fin numi Fig 6 6 a Parameter Group Selection
74. is field the primary voltage value of the TV used 100 to 22000V with minimum increase of 1V Q Secondary Voltage V enter in this field the secondary voltage value of the TV used 100 to 500V with minimum increase of 1V If the generator voltage value is lower than 500V the use of a step down transformer may not be necessary therefore the 100 is directly connected to the mains terminals In this case both the Primary and Secondary Voltage fields the same value equal to the predefined rated value should be entered Line VT present in the applications with network Line voltages higher than 500V which need a step down transformer between the network and MEC 100 sensing terminals A Primary Voltage V enter in this field the primary voltage value of the TV used 100 to 22000V with minimum increase of 1V Q Secondary Voltage V enter in this field the secondary voltage value of the TV used 100 to 500V with minimum increase of 1V MarelliGenerators SIN NT 023 5 45 ENGLISH 46 MEC 100 INTERFACE SYSTEM MarelliGenerators If the network voltage value is lower than 500V the use of a step down transformer may not be necessary therefore the MEC 100 is directly connected to the network terminals In this case in both the Primary and Secondary Voltage fields the same value equal to the predefined rated value should be entered TA generator makes the generator current sensing Q
75. is field the reactive power setpoint you like to keep expressed in percentage with respect to the maximum reactive power the maximum and minimum limits are established in the following two fields with minimum increase of 0 1 A Minimum Limit 96 enter in this field the capacitive minimum value which the reactive power setpoint can reach expressed in percentage with respect to the maximum reactive power 50 to 0 with minimum increase of 1 Q Maximum Limit enter in this field the inductive maximum value which the reactive power setpoint can reach expressed in percentage with respect to the maximum reactive power 0 to 100 with minimum increase of 1 By the term maximum reactive power it is meant the reactive power which can be obtained with rated voltage rated current and power factor PF 0 that is at zero active power If one of the two limits is modified and the current reactive power setpoint is outside the new defined range the setpoint is automatically brought to the just modified limit value Excitation Current Setpoint A Reactive Power enter in this field the excitation current setpoint you like to keep expressed in percentage with respect to the rated excitation current the maximum and minimum limits are established in the following two fields with minimum increase of 1 Q Minimum Limit enter in this field the minimum value which the excitation current setpoint can reach expressed in p
76. itch off of the de excitation contact This procedure permits to accelerate the excitation shutdown and strongly limit the generator over voltage WARNING during the parallel operations STOP contact and or de excitation contact can be only used simultaneously with the load rejection and or disconnection from parallel operation WARNING read carefully all the instructions about START and STOP contacts operating use see Par 3 5 WARNING Marelli Motori recommends to associate STOP contact to the de excitation contact only for improving the generator transient performance during the load rejection and or disconnection from parallel operation and safe the MEC 100 regulation system Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to a wrong or not allowed use of STOP and de excitation contacts MarelliGenerators 26 SIN NT 023 5 INSTALLATION ENGLISH D MarelliGenerators 4 INSTALLATION 4 1 INTRODUCTION In this section the instructions for the mechanical fastening of the MEC 100 and its electrical connection are provided 4 2 MOUNTING The MEC 100 support is conceived for two typologies of mounting On board machine mounting the fastening on vibration dampers and proper brackets is provided the brackets should be secured to the machine terminal board panel see Fig 4 2 a page 28 Panel mo
77. ith increases of 0 1s When the voltage falls below the defined threshold the protection timer is reset to zero This function can be enabled disabled 3 6 2 Field Over current Protection When the measured field current increases above a value threshold which can be set for a time interval whose length can be established the field over current protection is activated The activation of this protection is accompanied by a visual warning in the MEC 100 Interface System Field Overcurrent Protection item flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays The activation current threshold can be set between 0 and 15Adc with increases of 0 1Adc and the operation time measured by an internal timer between 0 and 10s with increases of 0 1s When the current falls below the defined threshold the protection timer is reset to zero This function can be enabled disabled 3 6 3 Generator Over voltage Protection When the measured generator voltage increases above a value threshold which can be set for a time interval whose length can be established the generator over voltage protection is activated The activation of this protection is accompanied by a visual warning in the MEC 100 Interface System Generator Overvoltage Protection item flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays The activation voltage threshold can be set in the for
78. l Apply to Relay 1 click to assign to relay 1 Alarm Options Low Level Apply to Relay 2 click to assign to relay 2 Alarm Options High Level Apply to Relay 1 click to assign to relay 1 Alarm Options High Level Apply to Relay 2 click to assign to relay 2 Levels Set up Diode Monitoring function is usually set in factory and left desabled Power Factor F 1 0 If tting should b follow thi dure ara new setting should be necessary follow this procedure Bus Voltage m m Generator start rated speed no load conditions Analog Input 1 0 0 4 Take note of the Excitation Current Ripple 96 measured ris In D n 2 h Excit Current Ripple 7 by MEC 100 If this value is higher than 10 stop the ware 201 Grd Tye 100 generator and check the rectifier bridge cause damage to one or more diodes is occurred Apply the rated load to the generator and take note of the new ripple measured by MEC 100 Low Level must be set to this value 5 High Level must be set to this value x 3 times Example ripple 20 gt Low Level 20 5 25 and High Level 20x3 60 If calculated High Level should be higher than 100 set this value to 100 anymore If the instructions above are not executable set Low Level 40 and High Level 100 or contact After Market Department see Section 7 D MarelliGenerators SIN NT 023 5 67 ENGLISH SET UP PROCEDURE MarelliGenerators
79. le On line item and click In the File Manager window select a directory where to save the file type the file name and click on OK 5 6 2 Loading a Set of Parameters TO DO To load a full set of system parameters Connect to the 100 see Par 5 3 3 Enter the password if required see Par 5 4 1 Click the Database button in the menu bar of the MEC 100 Interface System see Fig 5 6 2 a In the displayed pull down menu point to the Open and Apply Parameter File On line item and click In the File Manager window select the directory where the file to load is stored select it and click on OK This operation is possible only if the MEC 100 and the PC are communicating On line operating mode To check a parameter file without automatic applying to MEC 100 see Par 5 6 3 f MEC 100 Interface System DECERN Tools Help Open Parameter File Off line Open and Apply Parameter File On line Save Parameter File On line Exit R Open Comm RATED VOLTAGE RATED POWER FACTOR RATFN FRFOI IFNCY Fig 5 6 1 a Saving a Configuration Set MEC 100 Interface System PELES Tools Help Open Parameter File Off line Open and Apply Parameter File On line Bene Exit R Open Comm RATED VOLTAGE ud RATED POWER FACTOR Save Parameter File On line Fig 5 6 2 a Loading a Configuration Set BE CAREFUL TO APPLY A CONFIGURATI
80. lisation of the curve defined by setting the under excitation limiter C indicator in Fig 5 8 7 a see Par 3 7 3 Gey The A indicator in Fig 5 8 7 a identifies the button for the selection of the Power Diagram graphical display mode by clicking on it the described diagram replaces the System Parameters configuration window By clicking again on the same button the System Parameters configuration window reappears ____ D MarelliGenerators SIN NT 023 5 57 ENGLISH SET UP PROCEDURE MarelliGenerators 6 SET UP PROCEDURE In this Section basic instruction for the preliminary set up of MEC 100 by MEC 100 Interface System will be listed Should more detailed information be necessary please see Sections 3 4 and 5 6 1 MEC 100 INTERFACE SYSTEM INSTALLATION fa TO DO Insert the CD ROM disk provided with the MEC 100 into the PC CD ROM drive When the installation menu appears click the nstall button the set up utility of the MEC 100 Interface System will install automatically the software Follow the instructions which appear on the PC screen 2 2 6 2 PREPARAZIONE DEL 100 100 is equipped with an RS 232 serial port located on the card component side it consists of a DB 9 female connector For the connection to Personal Computer PC a standard communication cable ending with a DB 9 female connector is required If the DB 9 serial port is not available on PC one of the USB p
81. m in particular the voltage setpoint is automatically modified and reduced as soon as the generator frequency falls below a set value according to the curve shown in Fig 3 7 1 a Voltage in of rated voltage Corner Frequency Rated 0 ZeroVolt Frequency Frequency Frequency Hz Fig 3 7 1 a Generator Voltage Setpoint in Under frequency Conditions D MarelliGenerators SIN NT 023 5 21 ENGLISH FUNCTIONAL DESCRIPTION 22 MarelliGenerators The parameters which determine the curve and in particular its slope are the following The Corner Frequency which can be set from 40 to 60Hz with increases of 0 1Hz represents the frequency value below which the MEC 100 decreases the voltage setpoint The Zero Volt Frequency which can be set from 0 to 40Hz with increases of 0 1Hz represents the frequency relative to the point where the voltage setpoint is zeroed The activation of this limitation function is accompanied by a visual warning in the MEC 100 Interface System Underfrequency Limiter item flashing see Par 5 8 3 This function is always enabled and operates in AVR Mode 3 7 2 Over excitation Limiter The MEC 100 is capable of reducing the excitation current when this last reaches such a value as to cause the overheating of the exciter field When this function is active the activation results from the relevant authorization and a field over current takes place the field current value is decreased to
82. m of percentage of the generator rated voltage between 100 and 15096 with increases of 196 the operation time measured by an internal timer can be determined between 0 and 300s with increases of 0 1s When the voltage falls below the defined threshold the protection timer is reset to zero This function can be enabled disabled 3 6 4 Generator Under voltage Protection When the measured generator voltage falls below a value threshold which can be set for a time interval whose length can be established the generator under voltage protection is activated The activation of this protection is accompanied by a visual warning in the MEC 100 Interface System Generator Undervoltage Protection item flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays The activation voltage threshold can be set in the form of percentage of the generator rated voltage between 0 and 100 with increases of 1 the operation time measured by an internal timer can be determined between 0 and 300s with increases of 0 1s When the voltage increases above the defined threshold the protection timer is reset to zero This function can be enabled disabled MarelliGenerators SIN NT 023 5 FUNCTIONAL DESCRIPTION ENGLISH D MarelliGenerators 3 6 5 Generator Over current Protection The MEC 100 is capable of monitoring the value taken by the generator stator current under load conditions and sending a warnin
83. me Delay s enter in this field the minimum operation time value during which the MEC 100 is authorized to supply the Maximum excitation Current 0 to 600s with minimum increase of 1s Q Max Continuative Current A enter in this field the maximum continuative current level value 0 to 15A with minimum increase of 0 14 Enable Limiter limiter activation flag click on this button to activate the over excitation limitation function Apply to Relay 1 relay 1 assignment flag click on this button to assign the limitation intervention signal to relay 1 Apply to Relay 2 relay 2 assignment flag click on this button to assign the limitation intervention signal to relay 2 QA Underexcitation Limiter see Par 3 7 3 Q Leading Power at PF 0 enter in this field the maximum allowed absorbed reactive power value expressed in percentage with respect to the maximum reactive power 0 to 50 with minimum increase of 1 MarelliGenerators SIN NT 023 5 ENGLISH MEC 100 INTERFACE SYSTEM D MarelliGenerators By the term maximum reactive power it is meant the reactive power which can be obtained with rated voltage rated current and power factor PF 0 that is at zero active power M Enable Limiter limiter activation flag click on this button to activate the under excitation limitation function M Apply to Relay 1 relay 1 assignment flag click on this button to assign the limitation intervention signal to relay
84. nerators Power Factor Regulation Stability see Par 3 11 3 Proportional Gain enter in this field the proportional constant value of the regulation loop Q Integral Gain enter in this field the integrative constant value of the regulation loop 5 7 6 Limiters In Fig 5 7 6 a the limitation parameters configuration area is shown LIMITERS PARAMETER UNIT MIN MAX DATA Underfrequency Limiter Comer Frequency Hz 40 60 Zero Volt Frequency Hz 0 40 10 0 TU Overexcitation Limiter Maximum Current 0 25 10 0 Time Delay 0 600 3 Max Continuative Curent A 0 15 5 0 Enable Limiter Apply to Relay1 Apply to Relay2 Underexcitation Limiter of Rated Apparent Power Leading Power at PF 0 0 50 Enable Limiter ApplytoRelayl Apply to Relay2 Fig 5 7 6 a Limitation Parameter Area Three sets of parameters can be identified Underfrequency Limiter see Par 3 7 1 Q Corner frequency Hz enter in this field the corner frequency value in the under frequency voltage limitation curve 40 to 60Hz with minimum increase of 0 1 2 Zero Volt Frequency Hz enter in this field the zero Volt frequency value in the under frequency voltage limitation curve 0 to 40Hz with minimum increase of 0 1Hz Overexcitation Limiter see Par 3 7 2 Maximum Current A enter in this field the maximum allowed current level value 0 to 25A with minimum increase of 0 14 Q Ti
85. nfigurations are provided In the case of single phase sensing the voltage sensed is the line to line voltage between the phases U and V Uu This input is internally insulated 3 4 2 Generator Current Sensing A1 A5 B The MEC 100 is equipped with a double channel for the sensing of the generator current a 1A channel A1 B and a 5A channel A5 B at 50 60Hz frequency to be connected to a current step down transformer with a transformation ratio In 1 or In 5 where ly is the rated generator current The phase whose current value is measured is the W phase This input is internally insulated 3 4 3 Network Voltage Sensing L1 L2 The MEC 100 offers a wide range of measurement for the network voltage The two sensing terminals L1 L2 can be directly connected to the supply voltage for the following range from 100Vac to 500Vac at 50 60Hz frequencies see Par 2 3 For applications with supply voltages higher than 500V a step down transformer must be interposed with rated secondary voltage included in the ranges indicated in the relevant specifications The only single phase connection configuration is provided This input is internally insulated 3 4 4 Analogue Auxiliary Inputs E1 E2 M The MEC 100 is provided with two auxiliary inputs to control the voltage power factor reactive power and excitation current setpoints by means of an external device 1 In terminals E1 M 2 In terminals E2 M These inputs can be use
86. ng Power at PF 0 enter the maximum allowed absorbed reactive power value expressed in percentage with respect to the maximum reactive power 0 to 50 with minimum increase of 1 Underexcitation Limiter Enable Limiter click to activate the under excitation limiter Underexcitation Limiter Apply to Relay 1 click to assign the limitation intervention signal to relay 1 Underexcitation Limiter Apply to Relay 2 click to assign the limitation intervention signal to relay 2 BY DEFAULT LIMITERS AND PROTECTIONS ARE INITIALLY DISABLED Pay particular attention when configuring the MEC 100 to the activation of all concerned protections MarelliGenerators SIN NT 023 5 65 ENGLISH SET UP PROCEDURE MarelliGenerators Field Protections Window TO DO 66 2 2 2 2 e 2 v 2 2 2 e Field Overcurrent Maximum Current A enter the maximum allowed field current level value 0 to 15A with minimum increase of 0 1A Field Overcurrent Time Delay s enter in this field the protection time delay 0 to 10s with minimum increase of 0 1s Field Overcurrent Enable Protection click to activate the field over current protection function Field Overcurrent Apply to Relay 1 click to assign the protection intervention signal to relay 1 Field Overcurrent Apply to Relay 2 click to assign the protection intervention signal to relay 2
87. nt type 4 OmA for example if voltage setpoint limits are set to 80 and 120 of the generator rated voltage 4mA will be associated to the minimum limit 80 and 20mA to the maximum limit 120 and all the intermediate values of the generator voltage setpoint will proportionally correspond to the current values between 4 and 20mA Setpoint Window Gey TO DO Generator Voltage Setpoint Voltage enter the SETPOINT generator voltage setpoint expressed in percentage 07311 UNIT MIN DATA with respect to the machine rated value with minimum increase of 0 1 Generator Voltage Setpoint Minimum enter the minimum value which the voltage setpoint can reach Generator Voltage Setpoint 130 100 0 70 10 800 Voltage ee Minimum expressed in percentage with respect to the machine m Hg rated voltage 70 to 100 with minimum increase of Power Factor Setpoint Inductive 7 Capacitive 1 Power Factor 2 0 80 Generator Voltage Setpoint Maximum enter the Leading PF 05 1 0 80 maximum value which the voltage setpoint can reach Lagging PF EX i expressed in percentage with respect to the machine z x rated voltage 70 to 100 with minimum increase of Reactive Power Setpoint 1 Reactive Power 7 1 0 00 Minimum x so asso Power Factor Setpoint Select PF type inductive or Maximum 0 100 32 34 capacitive Excitation Current Setpoint Power Fac
88. o 600s 0 1s increment 1 maximum continuative threshold Range from 0 to 15A 0 1A increment Under excitation limiter Range Setpoint setting from 0 to 5096 of the maximum rated reactive power Curve defined by MEC 100 Interface System Under frequency limiter Corner frequency 40 to 60Hz 0 1Hz increment Zero Volt frequency 0 to 40Hz 0 1Hz increment MarelliGenerators SIN NT 023 5 TECHNICAL SPECIFICATIONS 2 9 PROTECTIONS ENGLISH MarelliGenerators PARAMETER DATA Range of voltage to 200Vdc threshold 1Vdc increment Field over voltage Alarm time dela 203005 y 015 Range of current Oto 15Adc Field over current threshold 0 1Adc increment 010105 Alarm time delay lt 0 15 increment Generator over voltage Range of voltage threshold 100 to 150 of the rated generator voltage 1 increment Alarm time delay lt 3005 0 15 increment 4 Generator under voltage Range of voltage threshold lt to 100 of the rated generator voltage 1 increment Alarm time delay lt 3005 0 15 increment Generator over current Type Inverse time curve Thresholds and alarm time delay 1 maximum threshold Range from 0 to 120 of the rated stator current 1 increment Time delay from 0 to 36
89. o start the MEC 100 Interface System follow the instructions provided in Par 5 2 3 At the start up a presentation window see Fig 5 3 1 a will be displayed with indication of the software version and the request for acceptance of the general contract conditions Informations TT INTERFACE SYSTEM __ Release 200 Please read this license contract carefully In order to use the software it is necessary to agree with the terms and conditions below MARELLI MOTORI S P A GENERAL USE AND GUARANTEE CONDITIONS MARELLI MOTORI S P A 100 REGULATION SYSTEM AND MEC 100 INTERFACE SYSTEM PROGRAMMING CALIBRATION AND MONITORING SOFTWARE CONTRACTUAL USE AND GUARANTEE CONDITIONS 1 INTRODUCTION IThe general guarantee conditions shown below refer to the use ofthe TO e MEO ann accept the contract terms www marelligenerators com Fig 5 3 1 a Start up Window MarelliGenerators 36 SIN NT 023 5 MEC 100 INTERFACE SYSTEM ENGLISH D MarelliGenerators start the 100 Interface System you must select accept the contract terms and then click on the Next button AN READ CAREFULLY THE GENERAL CONTRACT CONDITIONS Perform the above mentioned operations to start the program involves the SIGNING and FULL ACCEPTANCE by the user of the there described terms and conditions 5 3 2 Description
90. o wires coming from the measurement TA on the generator current sensing terminals Droop can be set from 0 to 10 with increase of 0 1 with phase current equal to the rated generator current and power factor corresponding to 0 80 This function is enabled by closing the PAR contact C5 contact see Par 3 5 5 It can only be activated in AVR Mode The switching to the PF or VAR Mode disables automatically the Reactive Droop Compensation During parallel operation between two or more generators PAR contact closed the LED corresponding to the Reactive Droop Compensation item in the system status window in System Monitoring see Par 5 8 2 becomes green 3 10 SOFT START 24 The MEC 100 provides the SOFT START function to bring linearly the generator voltage from the residual value to the reference one in a time interval whose length can be defined with minimum overshoot For this function it is enough to set only one parameter that is the ramp up time of the voltage setpoint This parameter whose value is included between 0 and 3600s with increases of 1s accounts for the time necessary to the MEC 100 to lead the voltage setpoint from OVac to 100 of its predefined value the rated voltage starting from the moment when the MEC 100 is enabled from the START contact see Par 3 5 1 In Fig 3 10 a the ideal time diagram of the voltage setpoint during the SOFT START function is shown The diagram in Figure 3 10 a refers to the ideal
91. ode 14 MarelliGenerators SIN NT 023 5 3 ENGLISH CONTENTS MarelliGenerators 3 4 ANALOGUE INPUTS 51 52 53 14 3 4 1 Generator Voltage Sensing 14 3 4 2 Generator Current Sensing A1 A5 B 14 3 4 3 Network Voltage Sensing 1 1 1 2 14 3 4 4 Analogue Auxiliary Inputs 1 2 14 3 5 15 3 5 1 START G1 Gontact rtc endet di 15 3 5 2 STOP C2 Contact lp dl AA lle 15 3 5 3 3 Contact emt 16 cr v mp Ee cec 16 3 55 lt A CS EGIT 16 3 9 6 JA iR Xni M u M s 17 3 5 7 VMATCH C7 Contact 17 3 5 8 FCR C8 Contact except for M71FA300A 17 3 5 9 RESET C8 Contact only for M71FA300A MOdel 17 3 6 MEG 100 PROTEGTIONS iiic eZ bee EE PARRA DSL e 18 3 6 1 Field Over voltage Protection i 18 3 6 2 Field Over current Protection 18 3 6 3 Generator Over voltage 18 3 6 4 Generator Under voltage 18 3 6 5 Generator Over current 19 3 6 6 Loss of Sensing Protection
92. of the power factor setpoint 1hundredthsPF s to 10hundredthsPF s with minimum 5 increase of 0 1 hundredthsPF s Traverse rate Reactive Power 9 5 enter the variation speed of the reactive power setpoint 0 1 s Reactive Power is to 5 s with minimum increase of 0 1 s Matching Minimum x 90 100 100 P The traverse rate of the excitation current is fixed and kept slow by Maximum 100 110 110 default Droop Settings Voltage Matching Minimum Limit 96 enter the Reactive Droop 1 10 4 0 minimum value of the network voltage range within which the voltage matching is enabled this limit is expressed in percentage respect to the rated generator m voltage 90 to 100 with minimum increase of 1 Voltage Matching Maximum Limit enter the minimum value of the network voltage range within which the voltage matching is enabled this limit is expressed in percentage respect to the rated generator voltage 100 to 110 with minimum increase of 1 MarelliGenerators SIN NT 023 5 63 ENGLISH SET UP PROCEDURE 64 MarelliGenerators Droop Settings Reactive Droop enter the Droop Compensation value for parallel operations 0 to 10 with minimum increase of 0 1 PID Setting Window TO DO Stability Settings select the desired predefined PID SETTINGS th standard setting or alternatively the custom setting in PARAMETER UNIT
93. on the data entered in the previous fields the MEC 100 Interface System calculates the generator rated reactive power value Rated Apparent Power kVA based on the data entered in the previous fields the MEC 100 Interface System calculates the generator rated apparent power value System Options Voltage Sensing in this field the user can define the type of sensing required by a given application single phase or three phase sensing PF VAR network parallel mode selection field in this field you can select which regulation mode should be used in the network parallel operations When the PF VAR contact see Par 3 5 6 is closed the MEC 100 will perform the adjustment of the power factor if PF has been selected or the reactive power if VAR has been selected Aux Analog Input Setting Single Operation see Par 3 4 4 No if this option is selected no analogue auxiliary input will be associated to the generator voltage setpoint 1 In if this option is selected analogue auxiliary input 1 will be associated to the generator voltage setpoint 2 In if this option is selected analogue auxiliary input 2 will be associated to the generator voltage setpoint MarelliGenerators SIN NT 023 5 MEC 100 INTERFACE SYSTEM ENGLISH MarelliGenerators Aux Analog Input Setting Parallel Operation see Par 3 4 4 No if this option is selected no analogue auxiliary input will be a
94. only for M71FA300A model Alarm reset contact normally open momentary pushbutton logic this input allows to reset all active alarms as a result of the intervention of one or more protections or limitations P The alarm reset should usually be operated after the intervention on the system to remove the causes of the alarm condition If the system is still working and the alarm causes have not been removed the RESET contact interrupts the alarms for about a second after which they are reactivated MarelliGenerators SIN NT 023 5 17 ENGLISH FUNCTIONAL DESCRIPTION D MarelliGenerators 3 6 MEC 100 PROTECTIONS 18 The MEC 100 offers 7 protection functions which consist in transmitting externally a warning of visual type through MEC 100 Interface System and or of signal type by associating this last to a relay 3 6 1 Field Over voltage Protection When the measured field voltage increases above a value threshold which can be set for a time interval whose length can be established the field over voltage protection is activated The activation of this protection is accompanied by a visual warning in the MEC 100 Interface System Field Overvoltage Protection item flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays The activation voltage threshold can be set between 0 and 200Vdc with increases of 1Vdc and the operation time measured by an internal timer between 0 and 300s w
95. ontact use restrictions and EMC immunity Rev 5 Additional instructions for UP DOWN contacts operating modes and restrictions 4 Additional instructions for RESET contact for M71FA300A code Manual MarelliGenerators SIN NT 023 5 v ENGLISH vi MarelliGenerators This page is intentionally blank MarelliGenerators PRELIMINARY INSTRUCTIONS SIN NT 023 5 MARELLI ENERGY CONTROLLER USER MANUAL Issued Date Stefano Massignani 22 04 2009 Checked Date User Manual Stefano Massignani 23 04 2009 Approved Date M EC 1 00 Documeni it Number Language Pages MarelliGenerators SIN NT 023 5 English 73 This page is intentionally blank CONTENTS ENGLISH MarelliGenerators CONTENTS Minimum PC System iv Installing the MEC 100 Interface System iv 1 GENERAL INFORMATION 7 1 1 INTRODUCTION MEC 100 SERIES 7 1 2 MEC 100 SERIES CHARACTERISTICS VERE VR Leu RT 7 1 2 1 7 122 2 ee eer ere pee ie illa 7 QAM 8 1 2 4 Human Machine 20 0 tienne
96. or Data Rated Voltage Rated Current Rated Power Factor Rated Frequency Rated Excitation Current Rated Real Power Rated Reactive Power Reted Apparent Power System Options Voltage Sensing PEVAR Aux Analog Input Setting Single operation Parallel operation SENSING Generator VT Primary Voltage Secondary Voltage Line VT Primary Voltage Fig 5 6 4 c Print MarelliGenerators 42 SIN NT 023 5 MEC 100 INTERFACE SYSTEM ENGLISH D MarelliGenerators 5 7 DEFINITION OF CONFIGURABLE PARAMETERS Each one of the 9 parameter categories is characterized by its own window which includes as many configurable fields as many parameters are here considered and contained Each field is generally characterized by 2 2 AN to Parameter name Unit of measurement Maximum and minimum entry limits Entered parameter At the moment of the first configuration operation each field includes a default value which prevents the MEC 100 from malfunctions or damages ALL PROTECTIONS AND LIMITATIONS ARE DISABLED Here below a description of the configurable fields is provided they are divided based on the group they belong fo N SIN NT 023 5 Numeric value entry Value calculated measured and or displayed by MEC 100 Interface System Choosing one option leads to the exclusion of the other options Enabling flag Pull down menu o
97. orts must be used paying attention to Interpose an USB DB 9 adapter between the standard cable and the PC Install the adapter driver files on PC please follow the provided instructions Ea TO DO The basic connection diagram for the preliminary MEC 100 set up is showm in Fig 6 2 a The proper actions are the following respect the shown order MEC 100 to by means of the communication cable Apply the supply voltage to supply terminalsi P1 and P2 The proper supply voltage ranges from 30Vac to 220Vac 2 SUPPLY VOLTAGE P2 a RS 232 MEC 100 9000900 9000 MarelliGenerators 58 SIN NT 023 5 SET UP PROCEDURE ENGLISH D MarelliGenerators AN FOR THE PRELIMINARY MEC 100 SET UP DISCONNECT ALL THE WIRING ADN SUPPLY THE CARD BY MEANS OF AN EXTERNAL POWER SOURCE Only the connections shown in Fig 6 2 a can be used WARNING Before doing any operations and or any set up on MEC 100 is to be taken into consideration that lethal voltage is present at the top panel when the unit is energized Top panel connections and or operations with or without tools should be made only when the unit is de energized 6 3 STARTING THE PROGRAM TO DO Click the Windows Start button Select Programs Point to the MarelliMotori directory Select the MEC 100 Interface Sy
98. othesis of submitting the closed chain system to a step input Controller Ramp up Time Overshoot Transient Length Steady State Error Increase of Kp Decreases Increases Does not influence Decreases Increase of Kj Decreases Increases Increases Eliminated Increase of Kp Does not influence Decreases Decreases Does not influence It is to be specified that the above mentioned relationships are not accurate since controllers depend each other but they can be considered enough to tune controllers in order to obtain the best possible transient response Generally speaking the Proportional controller Kp will contribute to reduce the step response rise time parameter which characterizes the response readiness and decrease but not to eliminate the steady state error The Integral controller controller with Kj constant eliminates the steady state error but worsens the transient response reduces the stability The Derivative controller Kp increases the stability of the system by improving the transient response MarelliGenerators SIN NT 023 5 25 ENGLISH FUNCTIONAL DESCRIPTION MarelliGenerators 3 11 2 Derivative Adjustments The MEC 100 Interface System provides two further adjustment parameters for derivative adjustments to improve the transient response 19 Derivative Item Time describes the number of sampling intervals referred to the
99. parameter to be configured see Fig 5 5 b As soon as all parameters into the group are set Rated Power Factor Rated Frequency Hz Rated Excitation Current click the Apply Current Page button located under Rated Real Power kW the configuration area see Fig 5 5 c FIELD PROTECTION Rated Reactive Power KAR GENERATOR PROTECTIONS Rated Apparent Power kVA IDIODE MONITORING System Options Voltage Sensing 1 Phase Fig 5 5 a Parameter Group Selection THAR pr Generator Data Rated Data 40 Rated Current B Apply Current Page Rated Power Factor Rated Frequency Hz Fig 5 5 b Fig 5 5 c Typing Parameters Button for Sending Data to the MEC 100 MarelliGenerators SIN NT 023 5 MEC 100 INTERFACE SYSTEM ENGLISH D MarelliGenerators 5 6 SAVING AND RETRIEVING A SET OF PARAMETERS E The MEC 100 offers the possibility of saving in a file the full set of system parameters to retrieve and load this last later in the same MEC 100 or in another unit 5 6 1 Saving a Set of Parameters TO DO To save a full set of system parameters Connect to the MEC 100 see Par 5 3 3 Enter the password if required see Par 5 4 1 Configure all the parameters to be set see Par 5 5 Click the Database button in the menu bar of the MEC 100 Interface System see Fig 5 6 1 a In the displayed pull down menu point to the Save Parameter Fi
100. prevent the working point from leaving the allowed operating area The limitation curve is obtained starting from the definition of the A point see example of Fig 3 7 3 a identified by the limit reactive power value with power factor equal to 0 expressed in percentage 0 to 50 minimum increase of 1 compared to the maximum reactive power By the term maximum reactive power it is meant the reactive power which can be obtained with rated voltage rated current and power factor PF 0 that is at zero active power The MEC 100 calculate automatically the limitation curve in particular the B point will have the half of the limit reactive power value at zero active power as abscissa 25 in the case shown in figure and 100 of the active power at PF 1 as ordinate The activation of this limitation is accompanied by a visual warning in the MEC 100 Interface System Underexcitation Limiter item flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays This function can be enabled disabled D MarelliGenerators SIN NT 023 5 23 ENGLISH FUNCTIONAL DESCRIPTION D MarelliGenerators 3 7 4 Inrush Current Limiter The MEC 100 is equipped with an internal protection against the so called Inrush Current or Input Surge Current that is the maximum instantaneous input current which appears when the device input stage is instantaneously energized The limiter acts only on the inrush cur
101. ption D MarelliGenerators 43 ENGLISH 44 MEC 100 INTERFACE SYSTEM MarelliGenerators 5 7 1 System Parameters In Fig 5 7 1 a the system parameters configuration area is shown SYSTEM PARAMETERS PARAMETER UNIT MIN MAX DATA Generator Data Rated Voltage 400 0 Rated Current 50 17 Rated Power Factor z 0 800 Rated Frequency Hz 8 50 00 Rated Excitation Current 1 60 Rated Real Power kw 27 81 Rated Reactive Power 20 85 Rated Apparent Power 34 76 System Options Voltage Sensing C 1 Phase 3 Phase aii VAR Aux Analog Input Setting Single operation C No 1 In C 2 ln Parallel operation Fig 5 7 1 a System Parameter Area Three sets of parameters can be identified Generator Electrical Data OOoood Rated Voltage V enter in this field the generator rated voltage value phase phase Rated Current A enter in this field the generator rated current value Rated Power Factor enter in this field the generator rated power factor value Rated Frequency Hz enter in this field the generator rated frequency value Rated Excitation Cirrent A enter in this field the generator rated excitation current value Rated Real Power kW based on the data entered in the previous fields the MEC 100 Interface System calculates the generator rated real power value Rated Reactive Power kvar based
102. r Frequency Hz enter the corner frequency value 40 to 60Hz with minimum increase of 0 1Hz Underfrequency Limiter Zero Volt Frequency Hz enter the zero Volt frequency value 0 to 40Hz with minimum increase of 0 1 2 Overexcitation Limiter Maximum Current A enter the maximum allowed current level value 0 to 25A with minimum increase of 0 14 Overexcitation Limiter Time Delay s enter the minimum operation time value during which the MEC 100 is authorized to supply the Maximum excitation Current 0 to 600s with minimum increase of 1s Overexcitation Limiter enter the maximum continuative current level value 0 to 15A with minimum increase of 0 14 Overexcitation Limiter Enable Limiter click to activate the over excitation limiter Overexcitation Limiter Apply to Relay 1 click to assign the limitation intervention signal to relay 1 Overexcitation Limiter Apply to Relay 2 click to assign the limitation intervention signal to relay 2 LIMITERS PARAMETER UNIT MIN MAX DATA Underfrequency Limiter Comer Frequency Hz Zero Volt Frequency Hz Overexcitation Limiter Maximum Current 0 25 10 0 Time Delay s 0 600 3 Max Continuative Curent A 0 15 5 0 Enable Limiter Apply to Relay Apply to Relay2 Underexcitation Limiter of Rated Apparent Power Leading Power at PF 0 0 60 50 Enable Limiter Apply to Relay Apply to Relay2 Underexcitation Limiter Leadi
103. rent while it has not any further influence on the normal working of the MEC 100 3 8 PROGRAMMABLE RELAYS The protection and limitation functions which can be set from MEC 100 Interface System can be individually associated to each one of the two programmable relays provided with the MEC 100 The provided contacts are normally open and the relevant technical data are specified in Par 2 10 3 9 REACTIVE DROOP COMPENSATION The MEC 100 provides a Reactive Droop Compensation function it is used to obtain the desired distribution of the reactive load between two or more generators which operate in parallel When this function is enabled the MEC 100 calculates the reactive part of the generator load starting from the measurement of the generator voltage between the U and V phases and the current of the W phase see Par 4 5 and modifies consequently the generator voltage setpoint A unit power factor does not lead to any change of the voltage setpoint An inductive power factor lagging leads to a decrease in the generator output voltage Droop A capacitive power factor leading leads to an increase in the generator output voltage If with inductive type load an increase in the generator voltage occurs the following conditions must be verified the U phase is connected to S1 and the V phase is connected to S2 the current sensing is made on the W phase If both points are verified then it is necessary to reverse the tw
104. se is provided Before using the MEC 100 on any generator make sure to read carefully and be familiar with all instructions contained in this documentation If you need more information please contact the Marelli Technical Support see Section 6 3 2 POWER AND CARD SUPPLY P1 P2 P3 The MEC 100 accepts terminals P1 P2 P3 a supply single phase or three phase alternating voltage ranging between 50 and 277V approximately with a frequency from 50 to 400Hz The voltage can be obtained from the main machine terminals the auxiliary winding or the PMG it is rectified filtered and used to energize the internal card circuitry and provide through the chopper output stage the power necessary for the appropriate generator excitation MEC 100 also accepts a supply continuous voltage included between 60 and 400V 3 3 OPERATING MODES 3 3 1 AVR Automatic Voltage Regulation Mode In this operating mode the MEC 100 allows to adjust the generator voltage At the START see Par 3 5 1 and FCR contact open C8 contact see Par 3 5 8 the MEC 100 always operates in AVR Mode and in this mode all the provided functions are active excepted for the Under excitation Limiter see Par 3 7 3 3 3 2 PF Power Factor Regulation Mode In this operating mode the MEC 100 allows to adjust the power factor The activation of the PF Mode is obtained by closing the PF VAR input contact C6 contact see Par 3 5 6 after enabling the same mode during t
105. ssociated to the power factor or reactive power setpoint it depends on the Operating Mode selected in System Parameter area see Par 5 7 1 19 if this option is selected the analogue auxiliary input 1 will be associated to the power factor or reactive power setpoint it depends on the Operating Mode selected in System Parameter area see Par 5 7 1 2 In if this option is selected the analogue auxiliary input 2 will be associated to the power factor or reactive power setpoint it depends on the Operating Mode selected in System Parameter area see Par 5 7 1 5 7 2 Sensing In Fig 5 7 2 a the sensing parameters configuration area is shown SENSING PARAMETER UNIT MIN MAX DATA Generator VT Primary Voltage 100 22000 400 Secondary Voltage 100 500 400 Line Primary Voltage V 100 22000 400 Secondary Voltage 100 500 400 Primary Current 0 10000 50 Secondary Current 1 5 Adjustments Generator VT Ratio X 9 105 1006 Line VT Ratio 95 15 1029 Generator CT Ratio 95 10 1000 Phase Compensation Excitation Current Measurement 116 Fig 5 7 2 a Sensing Parameter Area Four sets of parameters can be identified Generator VT present in the applications with generator voltages higher than 500V which need a step down transformer between generator and MEC 100 sensing terminals Q Primary Voltage V enter in th
106. stem icon Follow the instructions which appear in the start menu 6 4 ESTABLIGHING A COMMUNICATION LINK E TO DO Click the connection button Open Comm mostrato in Fig Open Comm 6 4 a If required enter the generator serial number e click OK Click OK to all the following messages The message ON LINE has to be displayed into the blue Fig 6 4 a bar below Connection button To select a PC communication port other than the default execute the following operations Click on the Tolls item in the menu bar of the MEC 100 Interface System see Fig 6 4 b Inthe displayed pull down menu select the Port Configuration item 2 window see Fig 6 4 appears where the desired communication port be selected MEC 100 Interface System E MEC 100 Interface System Database MEAS Help Modify Password Language G ene SERIAL NUMBER Open Comm RATED VOLTAGE RATED CURRENT RATED POWER FACTOR Fig 6 4 b Fig 6 4 c Communication Port Setting Communication Port Selection D MarelliGenerators SIN NT 023 5 59 ENGLISH SET UP PROCEDURE D MarelliGenerators 6 5 ENTERING THE PASSWORD Gey TO DO To remove the write protection of the MEC 100 and enter the password Click on the Enter Password button placed at the left bottom of the main screen see Fig 6 5 a Enter the password in the field on the displayed window see Fig 6 5 b The default password
107. t to obtain a correct and accurate sensing calibration 95 to 105 with minimum increase of 0 1 Phase Compensation degrees if the MEC 100 Interface System senses and displays a power factor value higher or lower than the actual value you need to introduce a compensation angle 0 default value to obtain a correct and accurate power factor measurement 10 to 109 with minimum increase 0 1 9 5 7 3 Setpoint In Fig 5 7 3 a the setpoint configuration area is shown SETPOINT PARAMETER UNIT MIN MAX DATA Generator Voltage Setpoint Power Factor Setpoint Inductive 7 Capacitive Power Factor E s loans Leading PF 05 Lagging PF 05 T zona Reactive Power Setpoint Reactive Power oo Minimum 50 0 a552 Maximum 0 100 3234 _ Excitation Current Setpoint Minimum 0 100 29 92 Maximum x A N e es Fig 5 7 3 a Setpoint Area Four sets of parameters can be identified MarelliGenerators SIN NT 023 5 MEC 100 INTERFACE SYSTEM ENGLISH PA D MarelliGenerators Generator Voltage Setpoint Q Voltage enter in this field the voltage setpoint which is required at the generator output terminals expressed in percentage with respect to the machine rated value see Par 5 7 1 the maximum and minimum limits are defined in the two following fields with minimum increase of 0 1 A Minimum
108. te this Manual Should further information be required please contact After Sales Department see the following reference MarelliService AFTER MARKET DEPARTMENT MARELLI MOTORI S p A Tel 39 0444 479 775 Fax 39 0444 479 757 E mail service marellimotori com Web www marellimotori com MarelliGenerators SIN NT 023 5 iii ENGLISH PRELIMINARY INSTRUCTIONS MarelliGenerators PRELIMINARY INSTRUCTIONS The CD ROM provided together with the MEC 100 includes the utility for the installation of the MEC 100 Interface System software for setting and monitoring operations The PC system has to match the following minimum requirements Minimum PC System Requirements Here below the minimum system requirements for the proper installation and utilization of the software are listed PC IBM compatible Intel Pentium Il 300MHz or higher recommended 128MB of RAM 256MB or more recommended Microsoft Windows OS CD ROM drive RS 232 Serial port or USB port The provided CD ROM includes also the MEC 100 User Manual files AN WARNING Before to use the MEC 100 regulation device and or install the MEC 100 Interface System carefully read all the instructions included into the User Manual User Manual Consultation In order to look the manual up consider the following instructions Insert the CD ROM disk provided with the MEC 100 into the PC CD ROM drive Open the folder Manuals and click th
109. the Tools item in the menu bar of the MEC 100 Interface System see Fig 5 4 2 a In the displayed pull down menu point to the Modify Password item and click In the window which appears enter the current password in the Previous Password field and the desired password in the New Password field afterwards enter the desired new password again for confirmation in the Confirm Password field see Fig 5 4 2 b Click OK 7 MEC 100 Interface System Database MEAS Help Port Configuration m Language G SERIAL NUMBER Open Comm RATED VOLTAGE RATED CURRENT Fig 5 4 2 a Change Password Selection SIN NT 023 5 Enter Password lt Fig 5 4 1 a Enter Password Button MEC 100 Interface System Ma NE Enter Password Cancel Fig 5 4 1 b Password Entry MEC 100 Interface System Modify Password Previous Password New Password Confirm Password Cancel Fig 5 4 2 b Modify Password 39 ENGLISH MEC 100 INTERFACE SYSTEM D MarelliGenerators 5 5 CHANGING THE SYSTEM SETTINGS 40 As anticipated in Par 5 3 2 the system parameters are grouped into eight main categories according to their typology System parameters Sensing Setpoint Stability Other settings Limiters Field protections Generator protections Diode monitoring Each category
110. this button to assign the protection intervention signal to relay 2 MarelliGenerators 52 SIN NT 023 5 MEC 100 INTERFACE SYSTEM ENGLISH D MarelliGenerators Generator Overvoltage see Par 3 6 3 Q Voltage Threshold enter in this field the maximum generator voltage level value which corresponds to the activation of the relevant protection It is expressed in percentage with respect to the generator rated voltage value 100 to 150 with minimum increase of 1 Q Time Delay s enter in this field the time interval value during which the MEC 100 is authorized to supply a voltage higher than or equal to the Voltage Threshold value before the activation of the relevant protection 0 to 300s with minimum increase of 1s Enable Protection protection activation flag click on this button to activate the generator over voltage protection function Apply to Relay 1 relay 1 assignment flag click on this button to assign the protection intervention signal to relay 1 Apply to Relay 2 relay 2 assignment flag click on this button to assign the protection intervention signal to relay 2 Generator Undervoltage see Par 3 6 4 Q Voltage Threshold enter in this field the minimum generator voltage level value which corresponds to the activation of the relevant protection It is expressed in percentage with respect to the generator rated voltage value 0 to 100 with minimum increase of 1 Q Time Delay s enter
111. tion current 0 to 100 with minimum increase of 1 Excitation Current Setpoint Maximum enter the maximum value of the excitation current setpoint expressed in percentage with respect to the rated excitation current 1 to 120 with minimum increase of 1 AN PAY PARTICULAR ATTENTION TO THE SELECTION AND OR MODIFICATION OF THE SETPOINT VALUES The limit thresholds set by the MEC 100 Interface System to the setpoint values do not protect against the selection of setpoints which may be potentially dangerous for devices and or installations connected to the generator In all configuration operations of the MEC 100 Interface System always check that the new setpoints to be entered are appropriate to the devices and or installations connected to the generator Marelli Motori is under no liability for any damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to a wrong setpoint setting Other Settings Window Gey TO DO Soft Start Soft Start Time s enter the voltage ramp OTHER SETTINGS Ih time 0 to 3600s with minimum increase of 1s NE boss o DATA Soft Start Soft start time s 1 3600 10 Traverse rate Voltage s enter the variation speed of the generator voltage setpoint 0 1 s to 5 s with minimum increase of 0 1 s Traverse tate Traverse rate Power Factor centesimiPF s enter the variation speed
112. tor Setpoint Power Factor enter the PF Excit Current 19 95 setpoint with minimum increase of 0 001 Menia 0 10 2992 Power Factor Setpoint Leading enter the minimum x 1 170 3383 leading limit 0 5 to 1 with minimum increase of 0 01 Power Factor Setpoint Lagging enter the minimum lagging limit 0 5 to 1 with minimum increase of 0 01 MarelliGenerators 62 SIN NT 023 5 SET UP PROCEDURE ENGLISH MarelliGenerators Reactive Power Setpoint Reactive Power enter the reactive power setpoint expressed in percentage with respect to the maximum reactive power with minimum increase of 0 1 Reactive Power Setpoint Minimum enter the capacitive minimum value of the reactive power setpoint expressed in percentage with respect to the maximum reactive power 50 to 0 with minimum increase of 1 Reactive Power Setpoint Maximum enter the inductive maximum value the reactive power setpoint expressed in percentage with respect to the maximum reactive power 0 to 100 with minimum increase of 1 Excitation Current Setpoint Excitation Current enter the excitation current setpoint expressed in percentage with respect to the rated excitation current with minimum increase of 1 Excitation Current Setpoint Minimum enter the minimum value of the excitation current setpoint expressed in percentage with respect to the rated excita
113. unting the fastening should be done at the 4 holes shown in Fig 4 2 6 page 29 4 3 SERIAL COMMUNICATION AND PRELIMINARY SET UP The MEC 100 is equipped with an RS 232 serial port located on the card component side it consists of a DB 9 female connector For the connection to Personal Computer see Section 5 for the MEC 100 Interface System setting instructions a standard communication cable ending with a DB 9 female connector is required In Fig 4 3 a the provided pin to pin connection is shown DB 9 Female DB 9 Male Connector Connector DCD 1 1 NC RXD 2 2 TXD TXD 3 3 RXD DIR 4 4 pes male Fot GND 5 are for DSR 6 6 NC RTS 7 7 ALI2 CTS 8 8 NC RI 9 9 NC Fig 4 3 a MEC 100 Serial Connection to Personal Computer MarelliGenerators SIN NT 023 5 27 ENGLISH INSTALLATION MarelliGenerators If the DB 9 serial port is not available on PC one of the USB ports must be used paying attention to 2 an USB DB 9 adapter between the standard cable and the PC Install the adapter driver files on PC please follow the provided instructions It is possible to set the MEC 100 regulation parameters only if the MEC 100 is properly supplied as described in Par 2 1 The MEC 100 is properly supplied if connected to a working generator operating at rated voltage and rated frequency ac
114. ure the rectifier bridge can be considered properly working If excitation current ripple is higher than the Low Level of failure for a period longer than the set delay but lower than the High Level of failure the Low Level allarm occures This situation could be associated for example to a light failure i e interrupted diode which can not damage the generator in a short period of time but has to be anyway solved f excitation current ripple is higher than the High Level of failure for a period longer than the set delay the High Level allarm occures This situation could be associated for example to a heavy failure i e shorted diode which can damage the generator in a short period of time and has to be solved as soon as possible The activation of this protection is accompanied by a visual warning in the MEC 100 Interface System when Low Level is reached Diode Monitoring Low Level item starts flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays When High Level is reached Diode Monitoring High Level item starts flashing see Par 5 8 3 and optionally can be associated to one of the two programmable output relays or to the Shutdown option This function can be enabled disabled 3 7 LIMITATION FUNCTIONS 3 7 1 Under frequency Limiter The MEC 100 reduces the excitation current any time the generator is used at low speed to avoid damages to the generator excitation syste
115. y damages which may occur to the AVR the plant or the persons or for lost earnings or financial loss or system stoppages due to a not suitable use of the Loss of Sensing Protection 3 6 7 Diode Failure Monitoring The MEC 100 is capable of sensing abnormal excitation currents due to the damaging of one or more diodes in the generator rectifier bridge interrupted or shorted diode These currents can lead to the exciter and or regulator damaging MEC 100 measures the excitation current average value and the width of its ripple If a diode is damaged the excitation current ripple is higher than the one present in correct behaviour conditions as showed in Fig 3 6 7 a MEC 100 offers two types of protection threshold or failure level Low Level and High Level of failure The two thresholds can be chosen in such a way to discern from a light failure i e interrupted diode to a heavy failure i e shorted diode Diode works fine Excitation current Interrupted diode Excitation current Excitation current Fig 3 6 7 a Excitation current when diode fails MarelliGenerators SIN NT 023 5 FUNCTIONAL DESCRIPTION ENGLISH D MarelliGenerators For example the two levels can be chosen with the following method f excitation current ripple is lower than the Low Level of fail

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