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GE General Electric Switch ZTSCT User's Manual

1. 98 Accessory Definitions 10 13 Controls Power Supply CPS 99 How to Set the System Clock 13 SCHEMAS 5 54 ee Ee S 30 CDI CU ENDE E Troubleshooting amp Diagnostics 31 T Maintenance and Testing 32 19 Inspection and Cleaning 32 User Setup SET Menu 17 Servici thers 32 SC ae ea Que eode 32 introduction GE Zenith Transfer Switches are used to provide a continuous source of power for lighting and other critical loads by automatically transferring from source 1 power to source 2 power in the event that source 1 voltage falls below preset limits Voltage sensing and system control is performed via a state of the art microcontroller located on the cabinet door It is designed to give highly accurate control of the transfer switch system GE Zenith transfer switches are designed for use on emergency or standby systems and are rated for total system or motor loads Transfer switches are UL Listed under Standard 1008 and CSA Certified under Standard C22 2 No 178 and IEC Listed under Standard 947 NOTES A protective device such as a molded case circuit breaker or fused disconnect switch MUST be installed on both sources of incoming power for circuit protection and as a disconnection device refe
2. S ET Network Communications Option USER SETUP PROG 1 MORE BACK PROG 2 GRD Input Sink LS OUT NIA OUT lt GEZA utut Madde ELEV PRE OUT ALARM OUT STE OUT SET SYSTEM CLOCK pg 13 DAYLIGHT SAVINGS ON OFF TMSIN CLOCK EXERCISER CDP pg 10 amp 15 LS IN OOOOOOOOOOO000000 amp R1 Output R1 Output EXER S2 RU NTI M E CDT Input and output availability Contact Rating 10A 250 VAC or 30 VDC p g i 1 0 amp 1 4 subject to factory configuration S1 UNDER VOLTAGE pg 8 Fail Restore 12v Output Source LN OUT L4 OUT L3 OUT Lithium Battery Exerciser Battery L2 OUT Replacement K 4100 BR2032 ervice Life 10 Years L1 OUT DUNNM gal operation S1 UNDER FREQUENCY pg 8 Fail Restore YN IN YEIN User Access Code Default 121212 TSNLIN Q2 TSL IN S12 IN 24 Hour Service 773 299 6600 OOOOOOOOOOOOOO S5 IN S1 OVER VOLTAGE pg 11 Fail Entelli Switch MX250 Restore Figure 11 S1 OVER FREQUENCY pg 8 Fail Restore TIME DELAY 52 START P1 pg 11 TIME DELAY S2 STABLE W S2 UNDER VOLTAGE pg 8 pg 13 Fail Restore LOAD PRESIGNAL TD T3 W3 pg 12 S2 UNDER FREQUENCY pg 8 Fail Restore LOAD DISCONNECT TD UMD pg 13 S2 OVER VOLTAGE pg 8 Fail Restore ATS OPEN TIME TO S2 DW DELAY units only pg 10 TIME DELAY 1 STABLE T pg 12 S2 OVER FREQUENCY pg 8 Fail Restore ATS OPEN TIME TO S1
3. DT DELAY units only pg 10 SET PHASE IMBALANCE VI FAIL 5 RESTORE 3 pg 13 S2 STOP DELAY U pg 12 CALIBRATE S1 pg 10 SET PHASE IMBALANCE VI TIME DELAY 30 seconds pg 13 CALIBRATE S2 pg 10 Optional Accessories E GE Zenith Controls ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 17H Entelli Switch 250 User Setup System Info MORE m18 S1 OK 01 50 FRI 31 MAY 2003 TEST PHASE TO PHASE VOLTAGE S1 amp 52 FREQUENCY INDICATION FOR S1 amp 52 K P pg 10 PLANT EXERCISER Next Impending Exerciser shows only if set SYSTEM INFO Serial Rev Event Log Data Unit Serial Software Revision Sequentially Numbered Log of 16 events that track date time reason and action taken Total Life Transfers N2P Days Powered Up Total Transfers to S2 Total S1 Failures Time S1 available in Hrs Time S2 available in Hrs N1P CHANGE USER ACCESS CODE View System Data Enter six digit access code The factory assigned six digit access code is located on the back of the controller Controller Inputs must be relay Isolated 3 Engine Start Relay De Energized A2 Al n RELAY 14 12 9 o ll Network Communications Option Customer GRD Input Sink LS OUT Controller Outputs have Limited Source Capacit NIA OUT Use only GE Zenith specified Output Modules ELEV PRE OUT ALARM OUT STE OUT MOTOR DISC OUT Output TMS I
4. access code is located on the back of the controller Engine Start Relay De Energized ll Network Communications Option GRD Input Sink LS OUT NIA OUT ELEV PRE OUT ALARM OUT STE OUT MOTOR DISC OUT TMS IN INHIB gt S1 INHIB gt S2 LS IN OOOOOOOOOOOOOOOO Input and output availability subject to factory configuration 12v Output Source LN OUT L4 OUT Lithium Battery L2 OUT L1 OUT YN IN YE IN TSNL IN Q2 TSL IN STAIN 24 Hour Service OOOOOOOOOOOOOO S5 IN Controller Inputs must be relay Isolated A2 Al n RELAY Customer Input Voltage Controller Outputs have Limited Source Capacity Use only GE Zenith specified Output Modules Output Contacts R1 Output R1 Output Contact Rating 10A 250 VAC or 30 VDC Exerciser Battery Replacement K 4100 BR2032 ervice Life 10 Years DU eal operation User Access Code Default 121212 Pyeindustrial com 773 299 6600 Entelli Switch MX250 Figure 11 GE Zenith Controls E ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A m16 Entelli Switch 250 User Setup SET Menu 1 OK Change adjustable values 01 50 2002 through the SET menu MORE TEST Enter six digit access code The factory assigned six digit access code 1VAB 2VAB ___ is located on the back of the controller ___ VBC X VCA _ VCA MORE CFG SET ESC Engine Start Relay De Energized
5. and frequency reach the preset Restore values the time delay to open Source 1 timer W begins its timing cycle to ensure voltage and frequency stabiliza tion before re transfer A manual pushbutton BYPASS is provided to bypass the W time delay if desired After the W time delay the MX controller initiates a transfer signal through the SCR NO to operate the main transfer operator The load is now transferred to the Open position The time delay to Source 2 timer DW begins its timing cycle After the DW time delay the MX controller initiates a transfer signal through the SCR E to operate the main transfer operator The load is now transferred to Source 2 line The transfer switch is mechanically locked SN limit switch awaits the next operation to Source 1 Restoration of Source 1 Power When Source 1 power reach the preset Restore values the controller initiates re transfer to Source Isequence The delay to open Source 2Timer T begins its timing cycle to ensure voltage and frequency stabilization before retransfer A manual pushbutton BYPASS is provided to bypass the T time delay if desired After the T time delay the MX controller initiates a transfer signal through the SCR EO to operate the main transfer operator The load is now transferred to the Open position The time delay to Source 1 timer DT begins its timing cycle After the DT time delay the MX controller initiates a transfer signal through the SCR N to op
6. as a line under character to be changed Change values with up and down keys 20 Press SAVE when complete 2 Press MORE repeatedly until SET USER SETUP then press BACK then ESC to the SI OK screen How to Initiate CDT Exerciser and to start an exercise cycle every 1 7 14 or 28 days From 51 screen 1 Press TEST 2 Pres MORE 3 Press START TEST TIMER to initiate Test 14 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A e If the CDT Exerciser is Factory configured for a Load Exerciser the Controller will immediately start a load exercise The controller will start the generator transfer the load to Source 2 and remain in Source 2 for the duration set for EXER S2 RUN TIME in the SET menu The controller will retransfer the load back to Source 1 after the SI stable timer has timed out and run the generator unloaded for the duration of the S2 stop delay timer Engine Cool Down Timer e If the CDT Exerciser is Factory configured for a No Load Exerciser the Controller will immediately start a No load exercise The controller will start the generator and run it unloaded for the duration of the S2 stop delay timer Engine Cool Down Timer Exercise will be repeated at the same time as initiated on every 1 7 14 or 28 days according to the selection made in the Configure CFG menu How to Bypass Cancel an exercise during an exercise cycle Press BPASS 2 Allow the controller to complete the Engine cool dow
7. both Source 1 and Source 2 contacts remain open 1 Close the bypass switch contacts BN as indicated on the bypass instruction label on the cabinet door 2 Disconnect all power sources from bypass isolation closed transition transfer switch 3 Open bottom cabinet door Turn the Disconnect Switch DS to the INHIBIT position 4 Remove the service access cover on the left side of the transfer switch 5 The manual operator and the manual handle will not be exposed Insert the handle into Source 1 side and close Source 1 contacts 6 Close the bottom cabinet door 7 Energize Source 1 power 8 Remove the automatic transfer switch from the bypass isolation transfer switch 9 Re install the transfer switch after maintenance with contacts closed to the same source as the bypass switch Reinstall the manual handle in its holder and the service access cover on the left side of the transfer switch 10 Re connect the transfer switch to AUTO As described in the following Sequence of Operation in this manual ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A GE Zenith Controls E Sequence of Operation Open Transition Source 1 Power Failure When Source 1 voltage or frequency has fallen below the preset Fail values the controller initiates the Time Delay Source 2 Start Engine Start Timer P cycle Upon completion of the P time delay an Engine start Signal is sent to Source 2 When Source 2 voltage
8. cabinet door and turn DS to Inhibit b Turn Bypass Selector Switch BSS to same power source as ATS c Position manual bypass handle MBH upward 3 To Test ATS a Bypass per above instructions b Rotate crank mechanism counter clockwise until ATS test light is illuminated c Turn DS to Auto d Test Switch TS on bottom cabinet door will allow electrical operation of ATS 4 To Isolate ATS a Bypass per above instructions b Rotate crank mechanism counter clockwise until ATS Isolated light is illuminated i pa i d 5 To Remove ATS SOURCE 1 a Bypass and isolate per above instructions b Disconnect multipin plugs and external connections to ATS Slide four corner latches of ATS to innermost B S7 WSU LE SOURCE 2 SOURCE 1 Ht sl os K 1 TH ATS I TEST d ATS can now be removed from cabinet IAC 2HNECTIT S OPER 1 6 To Reconnect ATS a Roll cart back into cabinet b Slide four corner latches of ATS to outermost position c Turn DS to Inhibit d Manually position ATS into same source as Bypass Switch e Reconnect multipin plugs and external connections to ATS f Rotate crank mechanism clockwise until ATS Test light is illuminated g Turn DS to Auto and use TS to electrically operate ATS h Turn DS to Inhibit i Rotate crank mechanism clockwise until ATS location pointer is aligned with Auto mark on location indica
9. for the lifetime of the switch Should debris contaminate the mechanism clean and apply additional Lubriplate GE Zenith can provide complete preventative main tenance services Please contact the GE Zenith Technical Services Department for additional information 832 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A CDT battery replacement lithium batteries may last up to 10 years however it is recommended that battery replacement be included in a 3 5 year service cycle The battery maintains the exerceser memory only and does not otherwise affect the operation Testing A manual operator handle is provided with the transfer switch for maintenance purposes only Manual operation of the switch must be checked before it is operated electrically Both power sources must be disconnected before manual operation of the switch Insert the handle and operate the transfer switch between the Source 1 and Source 2 positions The transfer switch should operate smoothly without binding Return the switch to Source 1 position remove the handle and return it to the holder provided After completing the inspection cleaning and servicing of the transfer switch reinstall the switch cover and close and lock the cabinet door Reclose the circuit breakers feeding the utility and generator sources to the switch Initiate the electrical transfer test by activating the TS test switch P timer will time out and the micro controller w
10. for the engine start control wires engine start relay terminals located to the left of the microprocessor Figure 6 shows the location of these terminals E GE Zenith Controls ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 5 Entelli Switch 250 Controller Entelli Switch 250 Controller Consists of two major assemblies Engine Start Relay P I The Microprocessor contains the following I O Interface A Entelli Switch 250 Board Customer Input b and Output 1 for system interface Located on the left hand side of the back of the unit see figure 7 1 accessories that can be found here are a Engine start relay P output b Pre Signal to transfer T3 and Entelli Switch 250 Board Battery Strip and UMD output optional Mau c Transfer Inhibit Q3 and Q7 input optional d Remote test O2 input optional e Network interface ZNET input output optional B LCD and Keypad located on the exterior of the door see figure 8 1 User accessibility to the following a LED indication of source availability b LED indication of transfer switch position c LCD screen indicates 1 timer count down numeric eas 2 event reporting text d Keypad provides user interface to in conjunction with LCD screen 1 Setting sensors and timers 2 Configuring logic accessories II The Controls Power Supply CPS Figure 7 Contains transformers which drop line voltage to control l
11. m2 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A GE Zenith Controls Installation A DANGER HAZARDOUS VOLTAGE Can Cause Severe Injury or Death Turn OFF all power before installation adjustment or removal of transfer switch or any of its components P Relay Engine Start Contact rating is 10 Ampere at 120VAC or 28VDC Gold plated Figure 2 Engine Start Control Connections The engine start terminals are clearly identified by a label on the microcontroller backplate In the case of manual transfer switches or in other applications not requiring the microprocessor clearly marked terminal blocks are provided in the upper left corner of the con trol panel for the engine start control wires Figure 3 shows location of engine start connections for Bypass Isolation Transfer Switch Figure 6 pg 5 shows location of engine start connections for Automatic Transfer Switch Terminals for field connections to the A3 Source 2 auxiliary contacts and the A4 Source 1 auxiliary contacts are also provided These terminals are clearly marked and appear on the side of the power panel On 400 amp metal frame units these terminals appear on the bracket above the operator handle Ubypous al i ewer Ir HB CONNECTION Kn cal Pir tls Coal TRANSFER FETI E eT LI weil Sa Figure 3 Typical Initial Energization Be
12. the available source Interlocks prevent both this transfer if the ATS is in the circuit and connected to the opposite source or reconnection of the ATS unless the positions match A WARNING A While the bypass switch is out of the AUTO position mode the ATS is INHIBITED from automatic operation Make certain the ATS is left in automatic after completion of any service B GE Zenith Controls BYPASS SOURCE 2 BYPASS SOURCE 1 e ATS TEST ATS INHIBIT SOURCE 2 AVAILABLE SOURCE 1 AVAILABLE o ATS ISOLATED DISCONNECT SWITCH INHIBIT POSITION LOAD DISCONNECT TD TIME REMAINING 04 02 Entelli Switch 250 Figure 13 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 25 B Sequence of Operation 100 400 AMP SOURCE 2 1 Automatic LOAD a Manually operated Bypass Switch contacts S LURCE 1 BN BE are open and ATS is supplying load b Disconnect Switch DS is in Auto 2 To Bypass ATS a Open bottom cabinet door and turn DS to Inhibit b Position manual bypass handle MBH to same power source as ATS 3 To Test ATS a Bypass per above instructions b Move ATS location handle ALH to Test location c Turn DS to Auto d Test Switch TS on bottom cabinet door will allow electrical operation of ATS 4 To Isolate ATS a Bypass per above instructions b Move ALH to Isolate location 5 To Remove ATS SOURCE 7 a Bypass and isolate per above instructions LOAD b Move AL
13. the test button before W timer timeout will abort the test Exception when the transfer commit option is configured ON To test lamps press TEST then scroll through MORE then press LAMP TEST To cancel LAMP TEST press MORE 820 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A Open Transition Source 1 Power Failure When a Test is initiated the controller initiates the initiates the Time Delay Source 2 Start Engine Start Timer P cycle Upon completion of the P time delay an Engine start Signal is sent to Source 2 When Source 2 voltage and frequency reach the preset Restore values the time delay to open Source 1 timer W begins its timing cycle to ensure voltage and frequency stabilization before re transfer A manual pushbutton BYPASS is provided to bypass the W time delay if desired After the W time delay the MX controller initiates a transfer signal through the SCR NO to operate the main transfer operator The load is now transferred to the Open position The time delay to Source 2 timer DW begins its timing cycle After the DW time delay the MX controller initiates a transfer signal through the SCR E to operate the main transfer operator The load is now transferred to Source 2 line The transfer switch is mechanically locked SN limit switch awaits the next operation to Source 1 Restoration of Source 1 Power Deactivating the Test switch initiates the re transfer When Source 1 power re
14. to start Source 2 Under Voltage Restore Factory Default 90 This adjustment determines the minimum acceptable en required to transfer to Source 2 ust via the SET menu Range is 85 to 100 in 1 increments see page 17 Once satisfied the W timer will begin timing to transfer to Source 2 ES ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A Under Voltage Fail Factory Default 80 This adjustment determines the low voltage threshold Adjust via the SET menu Range is 75 to 98 in 1 increments see page 17 Fail must be a minimum of 2 96 below Restore setting Once voltage falls below threshold T timer will be bypassed to expedite the transfer to Source 1 Over Voltage Fail Factory Default 110 This adjustment determines the maximum acceptable Over Voltage Adjust via the SET menu Range is 105 to 110 in 1 increments see page 17 Once exceed ed the T timer will be bypassed to expedite the transfer to Source 1 Over Voltage Restore Factory Default 105 This adjustment determines the minimum acceptable Over Voltage threshold at which the transfer switch is allowed to transfer to Source 2 Adjust via the SET menu Range is 103 to 105 in 196 increments see page 17 Restore must be a minimum of 2 below Fail setting Under Frequency Restore Factory Default 95 This adjustment determines the minimum acceptable frequency required to transfer to Source 2 Adjust via th
15. 000A GE Zenith Controls E Troubleshooting and Diagnostics A DANGER HAZARDOUS VOLTAGES CAN CAUSE SEVERE INJURY OR DEATH These charts may indicate problems that require authorized GE Zenith service personnel Hazardous voltages may exist on termination plugs other than those that go into the Entelli Switch 250 General Troubleshooting The following troubleshooting guide is used to recognize and determine basic faults When using this guide it will ask several questions about the condition of the switch This guide will then list an order of the possible faults You will then look at the first suspected fault to determine if it is the problem If it is not a fault you go to the Annunciation SOURCE 2 AVAILABLE Engine does not START Possible Cause s Engine start wires not terminated properly second suspected fault If you go through all of the suspected faults or the chart instructs you to call a GE Zenith Representative for further assistance NOTE When you use the troubleshooting charts the Annunciation column refers to the LED s on the control panel Corrective Action Check engine start connections LED off Generator is in OFF position Engine does not stop LCD Display TD Engine Cool Down SOURCE 1 POSITION and SOURCE 1 and SOURCE 2 Engine start wires not terminated correctly Investigate why Engine Control Switch was turned off U timing cycle not complete Check U tim
16. 167 F 4 F to 149 F 40 4000 AMP all other frame and panel types 20 C to 60 C 4 F to 140 F Final Equipment Inspection Prior to energizing the transfer switch 1 Remove any debris incurred with a vacuum due to shipment or installation A WARNING A Do not use a blower since debris may become lodged in the electrical and mechanical components and cause damage B GE Zenith Controls 2 Verify that all cabled connections are correct and that phase rotation of both sources match 3 Check engine start connections 4 Verify the correct connection of all control wires 5 Check settings of all timers and adjust as necessary 6 Adjust any optional accessories as required 7 Check the lug torque values of the power connections NOTE Lug torque values are specified in table 2 on pg 2 8 Make sure that all covers and barriers are installed and properly fastened NOTE Power panels ship from GE Zenith in Source 1 Position Each GE Zenith transfer switch is factory wired and tested A complete information package is furnished with each switch which includes a Sequence of operation b Description and operation of all accessories supplied c Power panel connection diagram and schematic d Description and identification of all customer field connections Installation of GE Zenith transfer switches includes a Mounting the transfer switch cabinet b Connection of Source 1 Sour
17. 3 E CDT One Event Timer Exerciser Load No Load One event Exerciser with adjustable Timer Exercise duration can be set between 5 and 60 minutes in 1 minute increments Can be configured to run every 1 7 14 or 28 days Factory default is 20 minutes How to CONFIGURE CFG and Set SET the Timer Exerciser 1 Beginning from the S1 OK screen press MORE then CFG 2 Press MORE to scroll to CONFIG TIMER EXERCISER screen 3 The third line of the CONFG TIMER EXERCISER will show either DAILY WEEKLY 14 DAY 28 DAY or OFF 4 Ifthe third line of the CONFG TIMER EXERCISER shows DAILY WEEKLY 14 DAY or 28 DAY as desired then proceed to step 10 5 If the third line of the CONFG TIMER EXERCISER shows OFF or if another timer selection is desired continue 6 Press SEL 7 Enter ACCESS code located on white label on the back of the controller 8 Press UP or DOWN to select DAILY WEEKLY 14 DAY or 28 DAY as desired 9 Press SAVE 10 Press MORE to scroll to CONFG TIMER EXERCISER XFR or NO XFR 11 Press Up or Down to select XFR Load Transfer or NO XFR No Load Transfer 12 Press SAVE 13 Press MORE repeatedly to BACK then S1 OK screen Set SET the Exerciser 14 Beginning from the S1 OK screen press MORE then SET 15 Press MORE repeatedly until EXER S2 RUN TIME screen 16 Press SEL 17 Enter ACCESS code located on white label on the back of the controller 18 Press SEL 19 Cursor is indicated
18. 40 400 Amp Denotes an Accessory with circuits as a standard GE Zenith Controls ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A omn Accessory Definitions 6P Test Switch Momentary 6A Test Switch Maintained Auto Momentary Test 6AP Test Switch Maintained Momentary utilizing keypad 6B Test Switch Maintained Auto Momentary Test Key Operated 6C Test Switch Maintained Auto Maintained Test Key Operated A1 Auxiliary Contact operates on Source 1 line failure ATE Auxiliary Contact operates on Source 2 line failure Auxiliary Contact Closed in emergency Source 2 Additional Available 10 max and need to be specified A4 Auxiliary Contact Closed in normal Source 1 Additional Available 10 max and need to be specified A62 Sequential Universal Motor Load Disconnect Circuit Normally closed auxiliary contacts for motor loads Open 0 60 seconds prior to transfer after transfer or both in either direction then re close in timed sequence after transfer ABS Auxiliary Contact Closed in bypass emergency Source 2 S P D T Standard up to 400 Amp Additional Available 10 max and need to be specified AB4 Auxiliary Contact Closed in bypass normal Source 1 S P D T Standard up to 400 Amp Additional Available 10 max and need to be specified B9 Battery charger connections Calibrate While monitoring the actual Pha
19. E Sequence of Operation cont d 600 1200 AMP 1 Automatic a Manually operated Bypass Switch contacts BN BE are open and ATS is supplying load b Disconnect Switch DS is in Auto 2 To Bypass ATS a Open bottom cabinet door and turn DS to Inhibit b Turn Bypass Selector Switch BSS to same power source as ATS c Position manual bypass handle MBH upward 3 To Test ATS a Bypass per above instructions b Rotate crank mechanism counter clockwise until ATS test light is illuminated c Turn DS to Auto d Test Switch TS on bottom cabinet door will allow electrical operation of ATS 4 To Isolate ATS a Bypass per above instructions b Rotate cank mechanism counter clockwise until ATS Isolated light is illuminated 5 To Remove ATS a Bypass and isolate per above instructions b Disconnect multipin plugs and external connections to ATS c Rotate four power panel latches to vertical position slide ATS forward and lock mechanism in place d ATS can now be removed from cabinet 6 To Reconnect ATS a Place ATS in slide mechanism b Unlock slide mechanism Slide ATS over power panel latches and rotate latches to horizontal position c Turn DS to Inhibit d Manually position ATS into same source as Bypass Switch e Reconnect multipin plugs and external connections to ATS f Rotate crank mechanism clockwise until ATS Test light is illuminated g Turn DS to Auto and use TS to electr
20. GE Zenith Controls ZISCT ZBTSCT Series Closed Transition Transfer amp Transfer Bypass Isolation Switches 100 4000 Amps 718 5000A Operation and Maintenance Manual Authorized Service For GE parts and service call 773 299 6600 Table of Contents Modicon dedu ve Redde ii Testno ooo ex eo ro wea dace 19 Sale ceo Vong 1 Introduction eee 19 Equipment Inspection and Storage 1 TESCO DUONG dose Ake a win dad at 19 Final Equipment Inspection 1 ATS 20 Mounung n 1 Open Transiiol se er ats 20 Installation D E 2 Closed pend e ton ee 9 Power GCONNECHONS cuu ema mers eie eet 2 eu Engine Start Control Connections 2 3 as Ns for Extended Parallel Time 22 Initial Energization 3 4 Control Connections 5 Sequencer bL M UE LL D QM 23 Entelli Switch 250 Microprocessor Controller 6 a Mg 25 Closed Transition 24 eoe p qr eec eed re d 6 LOD amp Keypad 7 Bypass Isolation Operation 20 ER g 00 400 MP rora uS ok tren et i ea 26 dodo DAE EO 600 1200 AMP axons rita amt hla eint t tois 27 dM MU Ri i 1600 4000 AMP
21. H to Release location SOURCE 1 c Disconnect multipin plugs d Lift ATS out of drawer 6 To Reconnect ATS a Place ATS into drawer slots front rollers first E SOREN WTR 575 S SOURCE I SOURCE 2 LOR LI SOURCE 1 webbed Ht sl b Turn DS to Inhibit TE os KP n SEF 1 TH ITE TZ ST c Manually position ATS into same source LOAD Z 2IRNECTII uS OPER 1 as Bypass Switch d Reconnect multipin plugs and external a 2 j ATS connections to ATS BN DUALE 1 e Push ATS inward to engage carriage f Move ALH to Test location as indicated by light g Turn DS to Auto and use TS to electrically operate ATS h Turn DS to Inhibit i Move ALH to Auto location j Turn DS to Auto and open Bypass with MBH k ATS is now fully automatic Fea a Am SPF TTA Is OF 5 Notes Figure 14 1 DS in Inhibit will prevent ATS electrical operation 2 Do not use excessive force on mechanical handles 3 Figures depict Bypass Source 1 Sequence is the same for Bypass Source 2 4 When ATS is in Test or Isolate Bypass Switch is manual transfer switch to either available source indicated on light panel 5 To operate Bypass Switch when ATS is in Test or Isolate position MBH to available power source Legend 1 BP Bypass switch indicated by contacts BN BE is a three position switch 2 ATS Automatic Transfer Switch m26 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A GE Zenith Controls
22. N Contacts OOOOOOOOOOOOOOOO INHIB gt S1 INHIB gt S2 LS IN J J 14 12 21 24 22 R1 Output R1 Output Input and output availability Contact Rating 10A 250 VAC or 30 VDC subject to factory configuration 12v Output Source LN OUT L4 OUT L3 QUT Lithium Battery Exerciser Battery L2 OUT Replacement K 4100 BR2032 ervice Life 10 Years L1 OUT Dore gal operation YNIN YEIN User Access Code Default 121212 TSNLIN Q2 TSL IN US pe industrial com S12 IN 24 Hour Service 773 299 6600 S5 IN OOOOOOOOOOOOOO Entelli Switch MX250 Figure 11 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A GE Zenith Controls Testing A CAUTION Due to hazardous voltage and current GE Zenith recommends that a GE Zenith Certified technician or a qualified electrician must perform the installation and maintenance of the switch A WARNING A Both power sources must be disconnected before manual operation of the switch Introduction A manual operator handle is provided with the transfer switch for maintenance purposes only Manual operation of the switch must be checked before it is operated electrically Both power sources must be disconnected before manual operation of the switch Insert the handle and operate the transfer switch between the Source 1 and Source 2 positions The transfer switch should operate smoothly without binding Return the switch to the Source 1 position r
23. Source2 When synchronism is accomplished transfer will take place Notes If S2 Frequency is less than S1 Frequency display will show a series of symbols If 52 Frequency is greater than S1 Frequency display will show a series of symbols Each or symbol represents 10 electrical degrees out of phase A maximum of 18 symbols 180 electrical degrees can be monitored The number of or symbols decrease as the two sources approach synchronism and increase as the two sources drift out of synchronism If S1 and S2 Frequencies are identical the display will show a series of alternating symbols which also indicate the approximate out of phase degrees In the event that the Sources do not come within 7 electrical degrees of each other within 60 seconds the unit will display the message SYNCH CHECKING and will allow the user to BYPASS If the BYPASS button is pressed the unit will display the message WARNING MAY CAUSE DAMAGE TO THE LOAD Pressing XFR will actually bypass the R50 Since R50 is a passive device the length of time it takes to reach Synchronism is de pendent on the frequency difference between the two Sources Source 1 is usually a Utility and the frequency is not within the control of the consumer Source 2 needs to be adjusted to create an adequate difference in order for the transfer to happen a timely fashion Note For optimum performance Source 2 Ge
24. The controller initiates a transfer signal through the SCR EO which opens ATS out of Source 2 The SEO limit switch activates The ATS has now closed back into Source 1 position without interrupting the load The ATS defaults to an open transition transfer when Source 1 fails Closed transition transfer is not possible with only one source available If the optional Transition Mode Selector TMS is available one can select an Open Transition Transfer or a Closed Transition Transfer when both Sources are available B GE Zenith Controls If while in Closed Transition Mode the ATS fails to open the source it is attempting to transfer out of within 100 milliseconds an Alarm will sound and the source that the ATS just closed into will be opened leaving the ATS in its initial source while disabling all other transfer operations until the problem is corrected and the Fail to Open Lockout Reset has been pressed A signal will be provided STE to Shunt Trip the Generator Circuit Breaker if the Transfer Switch remains closed into both Sources for more than 325 milliseconds The load will then be fed by the Source 1 The maximum time that the two Sources would be parallel under these conditions is less than 500 milliseconds Before operating the Closed Transition Transfer Switch the condition must be corrected and the Shunt Trip reset Refer to procedure for servicing the Switch after Shunt Tripping occures The unit is Factory set to a
25. ach the preset Restore values the controller initiates re transfer to Source Isequence The delay to open Source 2Timer T begins its timing cycle to ensure voltage and frequency stabilization before retransfer A manual pushbutton BYPASS is provided to bypass the T time delay if desired After the T time delay the MX controller initiates a transfer signal through the SCR EO to operate the main transfer operator The load is now transferred to the Open position The time delay to Source 1 timer DT begins its timing cycle After the DT time delay the MX controller initiates a transfer signal through the SCR N to operate the main transfer operator The load is now transferred to Source 1 line The transfer switch is mechanically locked SE limit switch awaits the next operation to Source 2 Immediately after re transfer the S2 Stop Delay Timer Delay to Engine Stop U begins its cycle to allow Source 2 Engine to run unloaded A manual pushbutton BYPASS is provided to bypass the U time delay if desired Upon completion of the U timing cycle the controller sends an Engine stop signal GE Zenith Controls E Te sti n g cont d A NOTICE A A periodic test of the transfer switch under load conditions is recommended to insure proper operation See National Electric Code articles 700 and 701 Closed Transition GE Zenith Closed Transition Transfer Switches are designed to Transfer the Load between two available sourc
26. ccomplish transfer within 5 electrical degrees Requires an Isochronous Governor with an operating frequency of 60 0 2 Hz Requires a Shunt Trip Breaker on the Generator set with a response time not exceeding 50 milliseconds ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 218 Te sti n g cont d A DANGER HAZARDOUS VOLTAGE Can Cause Severe injury or Death Turn OFF all power before installation adjustment or removal of transfer switch or any of its components Emergency Service Procedure for Extended Parallel Time ZTSCT Transfer Switch If Source 2 breaker shunt trip was triggered after an extended parallel time malfunction occurred Follow these steps to open the transfer switch 1 Disconnect all power sources from the transfer switch by opening all line breakers Source 1 and Source 2 2 Open the cabinet door and turn the disconnect switch to the INHIBIT position 3 Remove the service access cover on the left hand side of the transfer switch 4 The manual operator and the manual handle will now be exposed Insert the handle into Source 2 side operator Open Source 2 side contacts 5 Close the cabinet door 6 Energize Source 1 to supply the load until further repairs can be done ZBTSCT Transfer Bypass Switch a Auto Location Removal of closed transition transfer switch after Source 2 breaker shunt trip 1 Disconnect all power sources from bypass isolation transfer swi
27. ce 2 and Load cables or bus bars c Connection of external control circuits as required Mounting Adequate lifting means must be used to mount the transfer switch into place The recommended method for moving the transfer switch using the lifting eyes where supplied and a spreader bar is illustrated in Enough room should be allowed to open the cabinet doors fully for inspection and servicing of the switch per NEC and local codes A CAUTION Before drilling conduit entry holes or any accessory mounting holes cover and protect the switch and control panel to prevent dirt and metal fragments from entering the mechanical and electrical components Failure to do so may result in damage and malfunction of the switch Eenl 5i ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A Installation A DANGER A HAZARDOUS VOLTAGE Can Cause Severe Injury or Death Turn OFF all power before installation adjustment or removal of transfer switch or any of its components Power Connections C GE Zenith transfer switches are supplied with UL listed SPREADER BAR solderless screw type terminals as standard for the H _ Source 1 Source 2 and Load power connections Table 1 lists the number and sizes of cable lugs supplied as standard for each switch amp rating Connect Source 1 Source 2 and Load conducto
28. ce 2 Red indicates Source 2 Source 1 Position LED Green indicates Power Panel ATS acceptable for use is closed to Source 1 position LCD Screen is acceptable for use Exercise Event Impending S1 OK SES Current Time 01 50 Day and FRI 31 MAY 2003 SET Menu Date of Display MORE CFG TEST SET Keypad Menus MORE CFG TEST Entelli Switch 259 1 or the word 2 or the word on the LCD above the key The word above the key changes depending on which screen is being displayed on the LCD above the key The word above the key changes depending on which screen is being displayed 4 or the word on the LCD above the key The word above the key changes depending on which screen is being displayed 3 or the word on the LCD above the key The word above the key changes depending on which screen is being displayed Figure 9 B GE Zenith Controls ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 7H User Setting for Voltage amp Frequency Standard 3 Phase Sensing on 3 and 4 Pole Units Source 1 Under Voltage Restore Factory Default 90 This adjustment determines the minimum acceptable oe required to transfer to Source 1 ust via the SET menu Range is 85 to 100 in 197 increments see page 17 Once satisfied the T timer will begin timing to transfer to Source 1 Under Voltage Fail Factory Default 80 This adjustment determines the low
29. committed to transfer to Source 2 position once the W timer has begun timing even if Source 1 power returns before the transfer to Source 2 This is to ensure that the transfer takes place because one outage may be followed by another 14 Test Auto Source 1 Selector Door mount SW1 Auto Off Start Engine control selector Door mount Keyed or non keyed operation available SW2 Auto Off Engine control selector Door mount Keyed or non keyed operation available SWS3 Source Priority Selector Switch Door mount Allows selection of Source 1 or Source 2 to be the Prime Source Transfer Switch will transfer to selected Prime Source if that Source is available Keyed or non keyed operation available T Time Delay S1 Source 1 Stable Timer To delay trans fer to Source 1 immediate retransfer on Source 2 fail ure Adjustable 0 60 minutes in 1 second increments Standard setting is 30 minutes Adjust via SET menu see page 18 T3 W3 Elevator Pre Signal Auxiliary Contacts Open 0 60 seconds prior to transfer to either direction re closes after transfer U S2 Source 2 Stop Delay Timer Allows Engine to run unloaded after switch retransfer to Source 1 Adjustable 0 60 minutes in 1 second increments Standard setting is GE Zenith Controls E Accessory Definitions wona 5 minutes Adjust via SET menu see page 18 UMD Universal Motor Load Disconnect Circuit Auxiliary Contact opens 0 60 seconds
30. e SET menu Range is 90 to 100 in 1 increments see page 17 Once satisfied the W timer will begin timing to transfer to Source 2 Under Frequency Fail Factory Default 90 5 seconds minimum This adjustment determines the low frequency threshold Adjust via the SET menu Range is 88 to 98 in 1 increments see page 17 Fail must be a minimum of 2 below Restore setting Once satisfied the W timer will begin timing to transfer to Source 2 Over Frequency Fail Factory Default 105 This adjustment determines the maximum acceptable Over Frequency Adjust via the SET menu Range is 103 to 105 in 1 increments see page 17 Once exceeded the T timer will be bypassed to expedite the transfer to Source 1 Over Frequency Restore Factory Default 10296 This adjustment determines the minimum acceptable Over Frequency threshold at which the transfer switch is allowed to re transfer to Source 2 Adjust via the SET menu Range is 102 to 104 in 1 increments see page 17 Restore must be a minimum of 1 below Fail setting GE Zenith Controls E Accessory Group Packages Table 3 Accessories Group Packages Standard Accessory included in the group package O Optional Accessory not included but can be added to group package Optional Accessory Can not be used with accessory having the same symbol N A Denotes an Accessory with 2 circuits as a standard Optional for
31. e a minimum of 2 below Fail setting see page 18 R15 R15D Load Shed Should Source 2 become overloaded a signal can be given to switch to the dead or Mid position R16 Phase Rotation Sensing Can be turned on or off via CFG menu see page 17 Factory Default is on This feature prevents Line Source to Line Source trans fers from occurring between dissimilar phase sequences This condition is primarily caused by an installation error Connections from Source 1 and Source 2 need be verified compared and corrected to remedy the inconsistent phase rotation between the sources WARNING Turning off this feature can cause severe damage to loads R26 Interruptable Power Rate Provisions Allow transfer out of Source 1 position to Source 2 or dead Source 2 Alarm and Pre Signal circuit included ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 11 E Accessory Definitions wona R50 In Phase Monitor this feature restricts Live to Live Source Transfers to occur unless both Sources are within 7 electrical degrees or less of each other live Source to live Source transfers usually occur during transfer back to Source 1 or during Testing R50 does not change the operation of the Automatic Transfer Switch in a power failure mode After all timer functions have elapsed the CHECKING FOR SOURCE SYNCHRO NISM vill be displayed as well as the direction of transfer 51 52 for example denotes transfer from Source 1 to
32. ectrician must perform the installation and maintenance of the switch A WARNING A Both power sources must be disconnected before manual operation of the switch A preventive maintenance program will insure high reliability and long life for the transfer switch The preventive maintenance program for the transfer switch should include the following items Inspection and Cleaning The switch should be inspected for any accumulation of dust dirt or moisture and should be cleaned by vacuuming or wiping with a dry cloth or soft brush do not use a blower since debris may become lodged in the electrical and mechanical components and cause damage Remove the transfer switch barriers and check the condition of the contacts Any surface deposits must be removed with a clean cloth do not use emery cloth or a file If the contacts are pitted or worn excessively they should be replaced A general inspection of mechanical integrity should be made to include loose broken or badly worn parts Servicing All worn or inoperative parts must be replaced using GE Zenith recommended replacement parts Please refer to the Replacement Parts manual for specific part information and ordering procedures Please contact the GE Zenith Technical Services Department for the Replacement Parts manual The operating mechanism of the transfer switch is lubricated with Lubriplate 105 The lubricant applied at the factory provides adequate lubrication
33. emove the handle and return it to the holder provided After completing the inspection cleaning and servicing of the transfer switch reinstall the switch cover and close and lock the cabinet door Reclose the circuit breakers feeding the utility and generator sources to the switch Initiate the electrical transfer test by activating the test switch P timer will time out and the microcon troller will send an engine start signal When the W time has elapsed the switch will complete its transfer by closing into the Source 2 Deactivating the test switch will start retransfer to Source 1 The switch will complete its retransfer to Source 1 after the time delay of the T timer The U engine overrun timer allows the engine generator to run unloaded for a preset cool down period Test Options The ATS can be tested in either of two positions 1 Auto Position Full Transfer Test This test checks the complete operation of the ATS by transferring the load s power source from Source 1 to Source 2 2 Test Position This procedure is recommended for Preventive Maintenance PM of ATS without interrupting the Load thru the BYPASS ISOLATION SWITCH NOTE A periodic test of the transfer switch under load conditions is recommended to insure proper operation See National Electric Code articles 700 and 701 A WARNING A When performing a hi pot or dielectric test on the power section DISCONNECT the control panel plugs
34. er setting Check Engine Start Connections AVAILABLE LEDs on but U timer has timed out SOURCE 2 AVAILABLE LED off ATS will not transfer to SOURCE 2 Generator in MANUAL SOURCE 2 voltage or frequency not within acceptable parameters Place generator in AUTO Check Engine Start Connections Generator Breaker Generator Output and Engine Control Switch None Power supply connector unplugged Plug in connector LCD Display S1____ TD XFR 1582 Time Remaining ___ ATS will not transfer to SOURCE 1 LCD Display ATS Open Time Remaining _ m W timing cycle not complete DW timing cycle not complete Check W Timer setting Check DW Timer setting SOURCE 1 AVAILABLE LED off LCD Display Diagnostic Code 001 LCD Display S1 OK SOURCE 1 voltage or frequency not within acceptable parameters Power supply connector unplugged Plug in connector Limit switch or RT box Call Technical Services connector unplugged T timing cycle not complete Check utility and utility breakers Check T Timer setting LCD Display ATS Open Time Remaining _ B GE Zenith Controls TD timing cycle not complete Check DT Timer setting Table 4 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A Maintenance and Testing A CAUTION Due to hazardous voltage and current GE Zenith recommends that a GE Zenith Certified technician or a qualified el
35. erate the main transfer operator The load is now transferred to Source 1 line The transfer switch is mechanically locked SE limit switch awaits the next operation to Source 2 Immediately after re transfer the 52 Stop Delay Timer Delay to Engine Stop U begins its cycle to allow Source 2 Engine to run unloaded A manual pushbutton BYPASS is provided to bypass the U time delay if desired Upon completion of the U timing cycle the controller sends an Engine stop signal Table 3 Timer Designations as they appear in the SET menu Open Transition Source 1 Transfer to Source 2 Fails lt B GE Zenith Controls Time Delay Time Delay ATS Open Time Delay ATS Open S2 Stop S2 Start S2 Stable Time to S2 SI Stable Time to SI Delay Transfer to Source 1 Jl Engine S 1 Faros e Cooldown Returns ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 23mm Sequence of Operation wona Closed Transition GE Zenith Closed Transition Transfer Switches are designed to Transfer the Load between two available sources with out interrup ng power to the Load Make Before Break Paralleling of the two sources occurs within a predefined window of synchronization and lasts less than 100 milliseconds The initial Source is then disconnected Initiating a Closed Transition When a Test is initiated the controller initiates the Time Delay Source 2 Start Engine Start Timer P cycle Upo
36. es with out interrupting power to the Load Make Before Break Paralleling of the two sources occurs within a predefined window of synchronization and lasts less than 100 milliseconds The initial Source is then disconnected Initiating a Closed Transition When a Test is initiated the controller initiates the Time Delay Source 2 Start Engine Start Timer P cycle Upon completion of the P time delay an Engine start Signal is sent to Source 2 When Source 2 voltage and frequency reach the preset Restore values the time delay to open Source 1 timer W begins its timing cycle After the W time delay the ATS closes into Source 2 only after the controller ensures the proper phase relationship between the two Sources After the ATS closes into Source 2 the SE limit switch becomes activated The controller initiates a transfer signal through the SCR NO which opens the ATS out of Source 1 The SNO limit switch activates The ATS has now closed into Source 2 position without interrupting the load Retransfer with Closeed Transition Deactivating the Test Switch initiates the re transfer When Source 1 voltage and frequency reach the preset Restore values the time delay to open Source 2 timer T begins its timing cycle After the T time delay the ATS closes into Source 1 only after the controller ensures the proper phase relationship between the two Sources After the ATS closes into Sourcel the SN limit switch becomes activated
37. eter Wye or Delta RS232 or RS485 1 Running Time Meter Door mount N2 Operation Counter Door Mount P1 Time Delay Source 2 Start Adjustable 0 10 seconds Standard setting is 3 seconds Adjust via SET menu see page 18 P2 Time Delay 82 Start Adjustable 1 6 to 300 seconds Q2 Remote Peak Shave or Area Protection Circuit Energize Q2 to simulate Source 1 Line failure causing the Generator to start and transfer the load to Source 2 Should Emergency fail during this operation Transfer Switch will retransfer back to Source 1 Q3 Remote inhibit transfer to Source 2 circuit Energize Q3 input to allow transfer to Source 2 To enable Q3 option engage Q3 jumper B GE Zenith Controls Q7 Inhibit transfer to Source 1 circuit Energize Q7 input to prevent transfer to Source 1 R1 1 R1 3 Source 1 Over Voltage sensing for single and three phase systems Source 1 Over Voltage Fail Factory Default 110 This adjustment determines the maximum acceptable over voltage Adjust via the SET menu Range is 105 to 110 in 1 increments see page 18 Once exceeded the P timer begins timing to signal the Generator to start Source 1 Over Voltage Restore Factory Default 105 This adjustment determines the minimum acceptable over Voltage threshold at which the Transfer Switch is allowed to automatically transfer to Source 1 Adjust via SET menu Range is 103 to 108 in 1 increments Restore must b
38. evel for controller input and SCR inputs see figure 7 21 56 MON 23 APR 2002 MORE Ertelfi Switeh 250 Figure 8 m6 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A GE Zenith Controls Entelli Switch 250 Controller conta LCD amp Keypad These options are accessible through the LCD and keypad see figure below To become familiar with the options loaded into a particular unit scrolling through the SET and CFG menu will show the descriptions of the options see pages 16 17 These menus are the very same menus that are used to access the setting and or configuration of these options The SET setting menu is primarily used to show or change time and voltage settings The CFG menu is primarily used to turn an option on or off When scrolling through these menus no changes can be made without entry of the access code The factory set six digit access code is located on a white label on the back of the unit see figure 11 pgs 16 18 The Entelli Switch 250 has many logic options Each controller is downloaded with options at the time of manufacture The collection of options that any one controller has is specified at the time of order placement The following pages include all the options that can reside in the controller Not all units include all options Source 2 Position LED Red indicates Power Panel ATS is closed to Source 2 position Source 1 LED Green indicates Source 1 is Sour
39. fore proceeding refer to the information package supplied with the ATS and read and understand the information on all accessories provided 1 Unlock the enclosure 2 Open the enclosure 3 Verify the correct system voltage NOTE The equipment rating nameplate on the transfer switch lists the voltage See Figure 4 4 Close Source 1 circuit breaker NOTE The controller will illuminate Source 1 Available LED if proper voltage is sensed 5 Verify the phase to phase voltages at Source 1 line terminals 6 Close Source 2 circuit breaker 7 Start the generator s engine NOTE The controller will illuminate Source 2 Available LED when preset voltage and frequency levels are reached 8 Verify the phase to phase voltages at Source 1 line terminals 9 Verify that the phase rotation of Source 1 AN is the same as the phase rotation of B Source 2 C 10 Shut down the generator s engine we 11 Place the starting control in the Automatic position 12 Complete the visual inspection of the transfer switch 13 Close the enclosure 14 Lock the enclosure GE Zenith Controls SERIAL NUMBER RATING VOLTS AMPS SYSTEM VOLTS MODEL NUMBER Figure 4 A CAUTIONS A Certain accessories per specific schematics can inhibit automatic transfer Engine Gen Set could start when engine control wires are attached E GE Zenith Controls ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 3H Installat
40. from the microprocessor to avoid potential damage E GE Zenith Controls ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 19 Te sti n g cont d A NOTICE A A periodic test of the transfer switch under load conditions is recommended to insure proper operation See National Electric Code articles 700 and 701 SYSTEM TEST FAST XFR NO MORE TEST LOAD XFR EHE Freely Swatch 298 Figure 12 ATS Testing Start generator and verify proper voltage frequency and phase sequence match to Source 1 Shut down gen set and place in Auto Complete the visual inspection of the transfer switch and close the cabinet door Initiate the test by pressing the TEST button on the LCD keypad The controller will then prompt for your access code After entering the code three test options will appear XFR LOAD FAST TEST and NO XFR See Figure 12 e XFR LOAD test starts the generator and using the current timer settings transfers the load to Source 2 FAST TEST test presets timer values to a maximum 30 seconds during the test After completion of the test all timers are reset to their original values 3 W3 DT and DW remain e NO test starts the generator but does not transfer the load to the Source 2 Press and hold the desired test option button until the switch transfers to Source 2 load test or until the generator has been run for the desired amount of time no load test Releasing
41. ically operate ATS h Turn DS to Inhibit i Move ALH to Auto location j Turn DS to Auto and open Bypass with MBH k ATS is now fully automatic Notes 1 DS in Inhibit will prevent ATS electrical operation 2 Do not use excessive force on mechanical handles 3 Figures depict Bypass Source 1 Sequence is the same for Bypass Source 2 SOURCE 2 LOR 0 SOURCE 1 B S7 WWE SOURCE 2 SOURCE 1 alb ndo Ht sl C SOURCE 7 0 SOURCE 1 TE FU n SPs 1 TA In T25T LAAC 7L DBOZCTIS PER I BE 45SOURCE 2 LOS D BN 1 F Is Figure 14 4 When ATS is in Test or Isolate Bypass Switch is manual transfer switch to either available source indicated on light panel 5 To operate Bypass Switch when ATS is in Test or Isolate a Move MBH downward to open Bypass Contacts BN BE b Turn BSS to opposite power source c Move MBH upward to close into selected power source Legend 1 BP Bypass switch indicated by contacts BN BE is a three position switch 2 ATS Automatic Transfer Switch B GE Zenith Controls ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A Sequence of Operation ona 1600 4000 AMP 1 Automatic a Manually operated Bypass Switch contacts ou 2 BN BE open ATS is supplying load b Disconnect Switch DS is in Auto SOURCE 1 2 To Bypass ATS a Open bottom
42. ill send an engine start signal When the W time has elapsed the switch will complete its transfer by closing into Source 2 Deactivating the test switch will start retransfer to Source 1 The switch will complete its retransfer to Source 1 after the time delay of the T timer The U engine overrun timer allows the engine generator to run unloaded for a preset cool down period NOTE A periodic test of the transfer switch under load conditions is recommended to insure proper operation See National Electric Code articles 700 and 701 A WARNING A When performing a hi pot or dielectric test on the power section DISCONNECT the control panel plugs from the microprocessor to avoid potential damage GE Zenith Controls E B GE Zenith Controls ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 33 E C3 GE Zenith Controls A Product of GE Industrial Systems General Electric Company 830 West 40 Street Chicago IL 60609 USA 773 299 6600 Fax 773 247 7805 www geindustrial com
43. ion contra Initial Energization cont d 1 Unlock the enclosure After all options and accessories are checked and 3 p n l PRUTE Switch in the Inhibi verified follow these steps to set up the ATS Refer to i Entelli Switch 250 display Figure 5 The annunciation NOTE This step is only performed if the LEDs illuminate to indicate 1 source availability DS Option was purchased ATS position and 3 Entelli Switch 250 control 4 Close the external upstream Source 1 unction timing circuit breaker NOTES Source 1 Available and Source 1 Position LED s will illuminate If Source 1 Available LED does not illuminate verify that Source 1 Voltage is above the preset restore value The Gen Set will start and run while Source 2 stop Delay Timer is timing 51 OK 5 Close the External up stream Source 2 line 21 56 circuit breaker MON 23 APR 2002 6 Start the engine generator in MANUAL mode MORE TEST NOTE When the voltage and frequency H reach preset values the Source 2 Available LED will illuminate 7 Verify the phase to phase voltages at Source 2 line terminals 8 Verify that the phase rotation of Source 2 is the same as the phase A rotation of Source 1 Ny Entelli Switch 250 9 Shut down the generator s engine C B Place in Automatic Mode we Figure 5 LCD and keypad NOTE Source 2 Available LED will turn off NOTE The engine generator will continue to run for the durat
44. ion of Source 2 Stop Delay Timer 10 Place the disconnect switch to ENABLE 11 Complete the visual inspection of the transfer switch 12 Close the enclosure 13 Lock the enclosure A WARNING When performing a hi pot or dielectric test on the power section DISCONNECT the control panel plugs from the microprocessor to avoid potential damage m4 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A GE Zenith Controls Installation wona A DANGER HAZARDOUS VOLTAGE Can Cause Severe Injury or Death Turn OFF all power before installation adjustment or removal of transfer switch or any of its components Control Connections Figure 6 Clock Program Backup Battery Remove protective strip to enable clock functions Engine Start Connections Network Connector Input Output Connectors to Modules he et E A lt L ih Ji To Power Panel A complete information package is furnished with The terminals are clearly identified by a label on the each transfer switch including a complete connection microcontroller backplate In the case of manual trans diagram and schematic which details all necessary fer switches or in other applications not requiring the control circuit field connections microprocessor clearly marked terminal blocks are provided in the upper left corner of the control panel The engine start control wires connect to the
45. is indicated as a line under character to be changed Change values with up and down keys Press SAVE after each entry to save value and to move to the next value to be changed 7 Press BACK when complete 8 Press MORE repeatedly until SET USER SETUP Press BACK then ESC to the SI OK screen How to Bypass Cancel an exercise during an exercise cycle Press BPASS 2 Allow the controller to complete the Engine cool down cycle If the CD Exerciser is configured or Set for a No Load Exercise Or allow the controller to complete retransfer to Source 1 If the CD Exerciser is configured for a Load Exerciser How to Bypass the next exercise event and Keep the rest of scheduled events unchanged 1 Press TEST 2 Press MORE 3 Press BYPASS EXER To re institute the next exercise event back press CANCL BPASS How to check the next exercise event 1 From S1 OK screen press MORE three times 2 The unit will display the PLANT EXERCISER NEXT event in DAYS HOURS and MINUTES 3 Press ESC to SI OK Screen Notes e In the SI OK screen an E appears in the upper right hand corner of LCD screen when exercise is impending e For Load Exerciser actual exercise period ATS in S2 position CDT Exerciser timing period T S1 Stable Timer timing period e value greater than zero must be entered in the Exerciser duration field to be accepted as a valid exercise period e The Exercise cycle will be repeated on a regular basi
46. is not possible with only one source available If the optional Transition Mode Selector TMS is available one can select an Open Transition Transfer or a Closed Transition lransfer when both Sources are available If while in Closed Transition Mode the ATS fails to open the source it is attempting to transfer out of within 100 milliseconds an Alarm will sound and the source that the ATS just closed into will be opened leaving the ATS in its initial source while disabling all other transfer operations until the problem is corrected and the Fail to Open Lockout Reset has been pressed A signal will be provided STE to Shunt Trip the Generator Circuit Breaker if the Transfer Switch remains closed into both Sources for more than 325 milliseconds The load will then be fed by the Source 1 The maximum time that the two Sources would be parallel under these conditions is less than 500 milliseconds Before operating the Closed Transition Transfer Switch the condition must be corrected and the Shunt Trip reset Refer to procedure for servicing the Switch after Shunt Tripping occures The unit is Factory set to accomplish transfer within 5 electrical degrees Requires an Isochronous Governor with an operating frequency of 60 0 2 Hz Requires a Shunt Trip Breaker on the Generator set with a response time not exceeding 50 milliseconds GE Zenith Controls E Sequence of Operation cont d Bypass Isolation Operation An a
47. ll show time hours and minutes on the second line if the system clock has been set Date on third line Setting the System Clock Start from SI OK screen 1 Remove battery protective white plastic strip near P relay Press MORE then press SET 3 Press MORE and scroll to SET SYSTEM CLOCK using the MORE key 4 Press SEL 5 ENTER ACCESS CODE located on the white label on the back of the controller 6 Press SEL p 7 Use the up and down keys to change the hour value 8 Press SAVE this will enter this value and move cursor to minutes 9 Use the up and down keys to change the minutes 10 Press SAVE this will enter this value and move cursor to month B GE Zenith Controls 11 Use the up and down key up to change the month 12 Press SAVE This will enter this value and complete the clock setting 13 Use the up and down keys to change the date 14 Press SAVE this will enter this value and move cursor to year 15 Use the up and down keys to change year 16 Press SAVE this will enter this value and compete the clock setting 17 To edit settings press SEL and repeat steps 6 16 18 If the setting is satisfactory press MORE unit then returns to the SET menu then press BACK then ESC Replacement battery part 4100 Battery will last 5 years and provides power to retain clock function only Controller functions without battery ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 1
48. menu see page 18 DW Delayed Transition Only Time Delay from Neutral Switch position to Source 2 position Adjustable 0 10 minutes in 1 second incre ments Standard setting is 5 seconds Adjust via SET menu see page 18 Engine Start Contact EL P Event Log Sequentially Numbered Log of 16 events that track date time reason and action taken System Data Total Life Transfers N2P Days Powered Up Total Transfers to S2 Total S1 Failures Time SI available in Hrs Time S2 available in Hrs NIP F Fan contact operates when generator is running HT Heater and Thermostat K Frequency Meter Door mount K P Frequency Indication for 51 and S2 L LNP Center off position LCD Indicator Indicating LED lights L1 Indicates Switch in Source 2 position L2 Indicates Switch in Source 1 position L3 Indicates Source 1 available L4 Indicates Source 2 available GE Zenith Controls E Accessory Definitions wona IM 1 single Phase Amp Meter 2 Three Phase Amp Meter M80 3000 Digital Power Monitor M82 5200 Digital Power Meter M833A EPM 5300 Digital Power Meter with Modbus Port MSS3B EPM 5350 Digital Power Meter with Ethernet Port M84 7430 Digital Power Meter Wye or Delta M385A EPM 9450 Digital Power Meter Ethernet M85B EPM 9450 Digital Power Meter with Internal 56K Mod M386A EPM 9650 Digital Power Meter Wye or Delta RS232 or RS485 IM86B EPM 9650 Digital Power M
49. n completion of the P time delay an Engine start Signal is sent to Source 2 When Source 2 voltage and frequency reach the preset Restore values the time delay to open Source timer W begins its timing cycle After the W time delay the ATS closes into Source 2 only after the controller ensures the proper phase relationship between the two Sources After the ATS closes into Source 2 the SE limit switch becomes activated The controller initiates a transfer signal through the SCR NO which opens the ATS out of Source 1 The SNO limit switch activates The ATS has now closed into Source 2 position without interrupting the load Re Transfer with Closed Transition Deactivating the Test Switch initiates the re transfer When Source 1 voltage and frequency reach the preset Restore values the time delay to open Source 2 timer T begins its timing cycle After the T time delay the ATS closes into Source 1 only after the controller ensures the proper phase relationship between the two Sources After the ATS closes into Sourcel the SN limit switch becomes activated The controller initiates a transfer signal through the SCR EO which opens the ATS out of Source 2 The SEO limit switch activates The ATS has now closed back into Source 1 position without interrupting the load 824 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A The ATS defaults to an open transition transfer when Source 1 fails Closed transition transfer
50. n cycle If the CDT Exerciser is Factory configured for a No Load Exerciser Or allow the controller to complete retransfer to Source 1 If the CDT Exerciser is Factory configured for a Load Exerciser How to Bypass the next exercise event and Keep the rest of scheduled events unchanged 1 Press Test 2 Pres MORE 3 Press BYPASS EXER To re institute the next exercise event back press CANCL BPASS How to initiate a new exercise start time 1 Press TEST 2 Pres MORE 3 Press EXER CANCL 4 Press START TIMER TEST How to check the next exercise event 1 From S1 OK screen press MORE three times 2 The unit will display the PLANT EXERCISER NEXT event in DAYS HOURS and MINUTES 3 Press ESC to SI OK Screen Notes E appears in the upper right hand corner of LCD screen when exercise is impending For Load Exerciser actual exercise period ATS in S2 position CDT Exerciser timing period T 51 stable Timer timing period GE Zenith Controls E CDP Clock Exerciser Load No Load Clock Exerciser Allows the Generator to start and run unloaded or to simulate a power failure start Generator and run under load Can be configured by the end user for 1 7 14 28 or 365 day cycles e A total of 7 independent No Load exercise periods up to 10 hours each can be programmed for each of the daily weekly 14 day and 28 day exercisers e A total of 12 independent No Load exercise periods up to 10 hours can be pr
51. nerator should be adjusted a Maximum of 2 Hertz above or below the Utility frequency minimum of 0 1 Hertz 58 to 59 9 or 60 1 to 62 Hertz Adjustment of Generator to 60Hertz could cause lengthy transfer delay R50 Feature can be turned ON or OFF via CFG Menu see page 17 Factory Default if OFF S5P Auto Semi Manual selector In Auto position retransfer to Source 1 is automatic after the T timer has timed out The T time delay is bypassed if Source 2 fails In Manual retransfer to Source 1 is upon depression H12 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A of BYPASS DELAY button YEN or if Source 2 fails S12P Auto Manual Selector In Auto position the Automatic Transfer Switch functions automatically as specified with the Switch drawings In Manual the Automatic Transfer Switch will transfer to either direction upon depression of Source 1 or Source 2 transfer buttons Should Source 1 fail the Generator Source 2 will automatically start Once transferred in Manual the Switch maintains position selected even if selected power fails 13P Transfer Commit Configured via CFG menu see page 17 When this Feature is set to OFF The transfer Switch is not committed to transfer unless the outage duration is longer than the timers that precede the transfer to Source 2 position This assumes that the outage will be an isolated event When this Feature is set to ON The transfer Switch is
52. ogrammed for the 365 day Exerciser How to Configure CFG the Exerciser 1 Beginning from the S1 OK screen press MORE then CFG 2 Press MORE to scroll to CONFIG CLOCK EXERCISER screen 3 The third line of the CONFG CLOCK EXERCISER will show either DAILY WEEKLY 14 DAY 28 DAY 365 DAY or OFF 4 If the third line of the CONFG CLOCK EXERCISER shows DAILY WEEKLY 14 DAY 28 DAY or 365 DAY as desired press MORE repeatedly to BACK Press ESC then proceed to the SET menu to set the EXERCISER 5 Ifthe third line of the CONFG CLOCK EXERCISER shows OFF continue 6 Press SEL 7 Enter ACCESS code located on white label on the back of the controller 8 Press UP or DOWN to select DAILY WEEKLY 14 DAY 28 DAY or 365 DAY as desired 9 Press SAVE 10 Press MORE repeatedly to BACK then ESC to SI OK screen How to set SET the DAILY Exerciser 1 Beginning from the S1 OK screen press MORE then SET 2 Press MORE repeatedly until SET EXERCISER screen Press SEL 4 Enter ACCESS code located on white label on the back of the controller 5 Press SEL ps Indicates of Exercise Periods Indicates type of Exerciser DAILY WEEKLY 14 DAY 28 DAY or 365 DAY Indicates Exerciser start Time for DAILY Exerciser Time amp Day for WEEKLY Exerciser Time Date amp Month for 14 DAY 28 DAY and 365 DAY Exerciser 24 Hour System IT field or exit screen B GE Zenith Controls 6 Cursor
53. prior to transfer in either direction re closes after transfer Can be configured by end user for Pre transfer Post transfer or both VI Voltage Imbalance Three Phase For a three phase source this feature monitors phase voltage ratios based on a selected range within a selected time window Should any phase fall below the selected lower window limit or exceed the selected higher window limit within the selected time frame the controller initiates transfer to the other source Range 5 to 20 of Nominal voltage 10 to 30 seconds window user adjustable Resolution 1 Increments Minimum Differential 2 between Fail and Restore settings Factory default 10 Fail 8 Restore 30 Seconds See CFG Menu page 17 to configure ON or OFF See SET Menu page 18 to set Percentage and time windows W Time Delay S2 Source 2 Stable Timer To delay trans fer to Source 2 Adjustable 0 5 minutes in 1 second increments Standard setting is 1 second Adjust via SET menu see page 18 YEN Bypass Timers Key utilizing Keypad When applicable the system prompts the user to press a button to bypass T or W Timers should the user so desires ZNET Network Communications Interface Card How to Set the System Clock How to Set the System Clock Set System Clock time and date If the clock is not set the display will show SET SYSTEM CLOCK on the second line of the 51 OK screen The SI OK screen wi
54. rences made within this manual about the term S1 or Source 1 relate to a Normal Power Source All references made about the term S2 or Source 2 relate to an Emergency or Alternative Power Source A DANGER HAZARDOUS VOLTAGE Can Cause Severe Injury or Death Turn OFF all power before installation adjustment or removal of transfer switch or any of its components The safe operation of your switch is GE Zenith s focus The proper storage installation operation and mainte nance will help increase the life of the switch A CAUTION A Due to hazardous voltage and current GE Zenith rec ommends that a GE Zenith Certified technician or a qualified electrician must perform the installation and maintenance of the switch Equipment Inspection and Storage Once you have received the transfer switch inspect it for any damage This includes damage to the enclosure power panel control panel and wiring harness If any damage is found or suspected file a claim as soon as possible with the carrier and notify the nearest GE Zenith representative Before installation if it is necessary store the transfer switch in a clean dry place protected from dirt and water Provide ample air circulation and heat if necessary to prevent condensation Operating Storage Temperature Temperature Ambient Humidity 30 C to 40 400 AMP 5 to 95 75 molded shell non con 22 F to 20 C to 65 C densing
55. rs to the clearly marked terminals on the transfer switch Remove surface oxides from cables by cleaning with a wire brush Verify that all connections are correct before tightening the lugs All cable lug connections must be tightened to the proper torque values as shown in Table 2 NOTE Do not run cables or wiring behind CABINET front connected transfer switches LIFTING EYES Figure 1 NOTE When lifting the switch using a spreader bar height H must be equal to half of distance D Power Connections Screw Type Terminals for External Power Connections Switch Size Source 1 Source 2 amp Load Terminals Amps io 3 AWGto60MCM s f2AWGtoG0DMCM 4 12 800 1000 1200 2 AWG to 600 MCM 2 AWG to 600 MCM 1600 2000 Line Load and Neutral terminals are located in the rear of switch 2600 3000 4000 and arranged for bus bar locations Table 1 _ Tightening Torque for Lugs Engine Start Socket Size Control Connections Across Flats Engine start control wires connect to control terminals beside the MX250 Engine start terminals are indicated by a schematic symbol the symbol indicates the contact state for a de energized normal source Figure 3 shows the engine start contacts Make all other necessary control connections to the con trol panel terminal blocks per the schematics supplied with the ATS NOTE All control wires 18 12 AWG must be torqued to 19 in Ibs Table 2
56. s as programmed and initiated in the SET menu depending on what Exerciser was configured selected in the CFG menu Load No Load CDP Exercise Indicator NL Exercise duration for this event in hours and minutes up to 10 hours per event SAVE Up and Down Use to change values JAE ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 15 E To save value and to move cursor to next field be changed Figure 10 Entelli Switch 250 User Setup CFG Menu S1 OK 01 50 FRI 31 MAY 2003 MORE TEST 1VAB 2VAB VBC ___ ___ VCA VCA MORE CFG SET ESC CONFIG USER SETUP MORE BACK TIMER EXERCISER CDT 1 7 14 28 Day pg 10 amp 14 CLOCK EXERCISER LOAD OR NO LOAD CDP 1 7 14 28 365 Day pg 10 amp 15 TEST KEY 6 Maintained Momentary pg 10 TRANSFER COMMIT S13 ON OFF pg 12 AUTO MANUAL S5 or S12 ON OFF pg 12 IN PHASE MONITOR R50 ON OFF pg 12 S1 OVER VOLTAGE R1 1 or R1 3 ON OFF pg 11 S1 UNDER FREQUENCY ON OFF pg 8 S2 OVER VOLTAGE ON OFF pg 8 S2 OVER FREQUENCY ON OFF pg 8 PHASE IMBALANCE VI ON OFF pg 13 PHASE ROTATION MATCH R16 ON OFF pg 11 LOAD DISCONNECT TD UMD pg 13 TRANSFER ALARM CTAP ON OFF pg 10 NETWORK ZNET ON OFF pg 13 Optional Accessories Turn options ON or OFF via keypad through the CFG menu Enter six digit access code The factory assigned six digit
57. se to Phase voltage lev els and Frequency with a calibrated test equipment the Phase to Phase voltage sensing and Frequency can be adjusted accordingly Calibration capabilities are available for Frequency and AB BC CA Phase to Phase voltage for both Sources Adjust via SET menu see page 18 CDP Clock Exerciser Load No Load Allows the Generator to start and run unloaded or to simulate a power failure start Generator and run under load Can be configured by end user for 1 7 14 28 365 day cycle See page 16 m10 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A CDT Load or NO Load One event exerciser with adjustable Engine exercise timer Exercise duration can be set between 5 and 60 minutes in 1 minute increments Can be configured to run every 1 7 14 or 28 days Factory Default is 20minutes When exerciser is impending E appears in the upper right hand corner of LCD screen See page 14 for instructions Configured via CFG see page 17 Set via SET menu see page 18 CTAP Alarm Panel on transfer to Source 2 with Silence button DS Disconnect Switch Auto Inhibit Inhibits transfer in either direction when in inhibit Allows automatic operation when in Auto 40 400 Amps optional 600 4000 Amps standard DT Delayed Transition Only Time Delay from Neutral Switch position to Source 1 position Adjustable 0 10 minutes in 1 second incre ments Standard setting is 5 seconds Adjust via SET
58. t board isolates the MX250 from the line voltage further protecting the controller from harmful line transients HIE E Ep g n i EXE UI QU QU QU LU UU B GE Zenith Controls Primary Voltage at 50 60 Hz 120V 208 220V 230 240V 271V 380 400V 416 440V 460 480V 575 600V CPS Assembly Part No 50 1224 50 1225 50 1226 50 1227 50 1228 50 1229 50 1230 50 1231 50P 1200 50P 1201 50P 1202 50P 1203 50P 1204 50P 1205 50P 1206 50P 1207 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A 29 E Relay Transformer R T vonva Closed Transition CPS Schematic 20 21 22 30 31 32 XN1 SOURCE 1 CONTROL TRANSFORMER XN2 SOURCE 1 3 PHASE SENSING TRANSFORMER e XN1 XN2 XE1 XE2 XE1 SOURCE 2 CONTROL TRANSFORMER XE2 SOURCE 2 3 PHASE SENSING 24V 10V 11V 10V e e e 0 e 2s ve Wo Vo TRANSFORMER 8 5 is 2 S 22 22525 s5 8 8 g 8 8 S 8 8 8 8 5 900 18 SOURCE 2 24V OUTPUT 800 SOURCE 1 24V OUTPUT 3 PHASE SOURCE 2 SENSING C V SCR EO CONTROL VOLTAGE OPEN SOURCE 2 C V SCR NO CONTROL VOLTAGE OPEN SOURCE 1 GROUND C V SCR E CONTROL VOLTAGE SOURCE 2 C V SCR N CONTROL VOLTAGE SOURCE 1 COMMON SINGLE PHASE SOURCE 2 SENSING 3 PHASE SOURCE 1 SENSING 805 SOURCE 1 CONTROL POWER SOURCE 2 CONTROL POWER 1 J5 Figure 16 m30 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5
59. tch 2 Open the bottom cabinet door and turn the Disconnect Switch DS to the INHIBIT position 3 Remove the service access cover on the left hand side of the transfer switch 4 The manual operator and the manual handle will now be exposed Insert the handle into Source 2 side manual operator Open Source 2 side contacts 5 Close bottom cabinet door 6 Energize Source 1 power 7 Close the bypass contacts BN 8 Isolate the transfer switch 9 Remove the transfer switch from the bypass isolation transfer switch as indicated on the bypass instruction label to inspect and repair 10 Re install the transfer switch after maintenance with contacts closed to the same source as the bypass switch Reinstall the manual handle in its holder and the service access cover on the left side of the transfer switch 11 Re connect the transfer switch to AUTO b Auto Location Removal of the closed transition transfer switch if Source 1 and Source 2 contacts remain open 1 Close the bypass switch into the available source 2 Turn the DS to INHIBIT Remove the transfer switch service access cover Close the transfer switch into the same source as the bypass switch Incorrect sequencing is prevented by the interlocks while the transfer switch is in AUTO only 3 Remove the transfer switch from the bypass isolation transfer switch to inspect and repair Test Location Removal of the closed transition transfer switch if
60. tor ATS must be in same source as Bypass j Turn DS to Auto and open Bypass with MBH k ATS is now fully automatic 4 50URCE 2 SDURCE 1 Fea PROCHES 13TH Is oF 25 Figure 14 Notes 1 DS in Inhibit will prevent ATS electrical operation 2 DO NOT use excessive force on mechanical handles 3 Figures depict Bypass Source 1 Sequence is the same for Bypass Source 2 4 When ATS is in Test or Isolate Bypass Switch is a manual transfer switch to either available source indicated on light panel 5 To operate Bypass Switch when ATS is in Test or Isolate a Move MBH downward to open Bypass Contacts BN BE b Turn BSS to opposite power source c Move MBH upward to close into selected power source Legend 1 BP Bypass switch indicated by contacts BN BE is a three position switch 2 ATS Automatic Transfer Switch 828 ZTSCT ZBTSCT Operation and Maintenance Manual 71R 5000A GE Zenith Controls E Controls Power Supply CPS Closed Transition Each Entelli Switch 250 microprocessor based ATS controller requires a Controls Power Supply CPS to apply line voltage to the ATS operator via SCRs Also required is power for the Entelli Switch 250 printed circuit board and an application of sensing voltage proportional to line voltage This is accomplished by the Controls Power Supply CPS This method of switching operator voltage and applying power and sensing voltage to the printed circui
61. utomatic transfer switch equipped with a bypass isola tion switch provides the ability to withdraw the ATS for test ing and or maintenance purposes without interrupting the served load Operation of the unit is quick and convenient requiring only one operator and less than one minute to complete Instructions are mounted on the front of each isolation switch door along with a mimic panel providing indication of power source availability and ATS bypass switch positions The bypass switch is normally open on both sources with the ATS feeding the system load During operation the bypass is closed paralleling the ATS contacts which then allows withdrawal of the ATS to the TEST or ISOLATE positions Mechanical and electrical interlocks are included to prevent cross servicing or bypassing to a dead source In the TEST position the ATS is disconnected from the load now fed through the bypass but control power is present to allow complete operational testing through the control panel of the transfer switch In the ISOLATE position the ATS is completely withdrawn and may be removed from the enclosure for maintenance if desired After the isolation operation if the bypass is closed on Source 1 and if this source fails an auxiliary contact on the bypass control will automatically start the engine generator set When the second source is available the manual handle of the bypass may be operated to transfer the load to
62. voltage threshold Adjust via the SET menu Range is 75 to 98 in 1 increments see page 17 Fail must be a minimum of 2 96 below Restore setting Once voltage falls below threshold P timer begins timing to signal Source 2 Generator to start Under Frequency Restore Factory Default 95 This adjustment determines the minimum acceptable frequency required to transfer to Source 1 n ust via the SET menu Range is 90 to 100 in o increments see page 17 satisfied the T timer will begin timing to transfer to Source 1 Under Frequency Fail Factory Default 9096 5 seconds minimum This adjustment determines the low frequency threshold Adjust via the SET menu Range is 88 to 98 in 1 increments see page 17 Fail must be a minimum of 2 96 below Restore setting Once satisfied the T timer will begin timing to transfer to Source 1 Over Frequency Restore Factory Default 10296 This adjustment determines the minimum acceptable Over Frequency threshold at which the transfer switch is allowed to re transfer to Source 1 A5 ust via the SET menu Range i is 102 to 10496 in o increments see page 17 Restore must be a minimum of 1 below Fail setting Over Frequency Fail Factory Default 105 This adjustment determines the maximum acceptable Over Frequency Adjust via the SET menu Range is 103 to 10596 in 1 increments see page 17 Once exceeded the P timer begins timing to signal the generator

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