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GE Zenith Controls 71R-5000A 11/04 ZTSCT/ZBTSCT Series Closed T ransition T ransfer & T ransfer Bypass - Isolation Switches 100-4000 Amps Operation and Maintenance Manual.
Page Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 Equipment Inspection and Storage . . . . . . . . . . 1 1 Final Equipment Inspection .
GE Zenith Controls 1 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Safety 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.
2 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Installation T able 2 T ightening T orque for Lugs Socket Size Across Flats T orque Lb.
GE Zenith Controls 3 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Installation (cont’d) Engine Start Control Connections The engine-start terminals are clearly identified by a label on the microcontroller backplate.
4 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Installation (cont’d) NOTE : When the voltage and frequency reach preset values, the Source 2 A vailable LED will illuminate. 7. V erify the phase to phase voltages at Source 2 line terminals.
GE Zenith Controls 5 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Installation (cont’d) A complete information package is furnished with each transfer switch including a complete connection diagram and schematic which details all necessary control circuit field connections.
6 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Entelli-Switch 250 Controller Entelli-Switch 250 Controller Consists of two major assemblies: I. The Microprocessor contains the following: A. Entelli-Switch 250 Board - Customer Input and Output (I/O) for system inter face.
GE Zenith Controls 7 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Entelli-Switch 250 Controller (cont’d) Figure 9 LCD & Keypad These options are accessible through the LCD and keypad (see figure below).
8 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) User Setting for V oltage & Frequency Standard 3-Phase Sensing on 3 and 4 Pole Units Source 1 Under V oltage "Restore" Factory Default: 90% This adjustment determines the minimum acceptable voltage required to transfer to Source 1.
GE Zenith Controls 9 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Accessory Group Packages Accessories 6P A1 A1E A3 A4 Calibrate CDT CDP DS** DT DW E EL/P K/P L1 L2 L3 L4 LN P1 Q2 Q.
10 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Accessory Definitions 6P T est Switch, Momentary 6A T est Switch, Maintained Auto/Momentary T est 6AP T est Switch.
GE Zenith Controls 11 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Accessory Definitions (cont’d) M1 Single Phase Amp Meter M2 Three Phase Amp Meter M80 3000 Digital Power Monitor.
12 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Accessory Definitions (cont’d) R50 In Phase Monitor this feature restricts Live to Live Source T ransfers to occur unless both Sources are within 7 electrical degrees or less of each other .
GE Zenith Controls 13 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Accessory Definitions (cont’d) 5 minutes. Adjust via SET menu (see page 18) UMD Universal Motor Load Disconnect Circuit: Auxiliary Contact opens 0-60 seconds prior to transfer in either direction, re-closes after transfer .
14 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) 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.
SET EXERCISER 00:00 T o save value and to move cursor to next field to be changed. Indicates # of Exercise Periods BACK ^ v SA VE Indicates type of Exerciser DAIL Y , WEEKL Y , 14-DA Y , 28-DA Y or 36.
16 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Entelli-Switch 250 User Setup - CFG Menu T urn options ON or OFF via keypad through the CFG menu Enter six digit a.
GE Zenith Controls 17 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Entelli-Switch 250 User Setup - SET Menu Change adjustable values through the SET menu.
18 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Entelli-Switch 250 User Setup - System Info View System Data Enter six digit access code (The factory assigned six.
GE Zenith Controls 19 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) T esting 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 .
20 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) T esting (cont’d) A TS T esting 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 .
GE Zenith Controls 21 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) T esting (cont’d) Closed T ransition GE Zenith Closed T ransition T ransfer Switches are designed to T ransfer the Load between two available sources with out interrupting power to the Load (Make-Before-Break).
22 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) T esting (cont’d) Emergency Service Procedure for Extended Parallel T ime ZTSCT T ransfer Switch If Source 2 breaker shunt trip was triggered after an extended parallel time (malfunction) occurred.
GE Zenith Controls 23 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Sequence of Operation Open T ransition 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.
24 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Sequence of Operation (cont’d) Closed T ransition GE Zenith Closed T ransition T ransfer Switches are designed to T ransfer the Load between two available sources with out interrupting power to the Load (Make-Before-Break).
GE Zenith Controls 25 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Sequence of Operation (cont’d) Bypass-Isolation Operation An automatic transfer switch equipped with a bypass-isola- tion switch provides the ability to withdraw the A TS for test- ing and/or maintenance purposes without interrupting the served load.
26 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Sequence of Operation (cont’d) 100-400 AMP 1) Automatic a) Manually operated Bypass Switch contacts (BN/BE) are open and A TS i s supplying load. b) Disconnect Switch (DS) is in Auto.
GE Zenith Controls 27 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) 600-1200 AMP 1) Automatic a) Manually operated Bypass Switch contacts (BN/BE) are open and A TS i s supplying load. b) Disconnect Switch (DS) is in Auto. 2) T o Bypass A TS a) Open bottom cabinet door and turn DS to Inhibit.
28 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) 1600-4000 AMP 1) Automatic a) Manually operated Bypass Switch contacts (BN/BE) are open and A TS i s supplying load. b) Disconnect Switch (DS) is in Auto. 2) T o Bypass A TS a) Open bottom cabinet door and turn DS to Inhibit.
GE Zenith Controls 29 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Closed T ransition Each Entelli-Switch 250 microprocessor based A TS controller requires a Controls Power Supply (CPS) to apply line voltage to the A TS operator via SCRs.
C.V. SCR-N CONTROL VOLTAGE (SOURCE 1) C.V. SCR-E CONTROL VOLTAGE (SOURCE 2) C.V. SCR-EO CONTROL VOLTAGE (OPEN SOURCE 2) C.V. SCR-NO CONTROL VOLTAGE (OPEN SOURCE 1) SCR-NO JC 908 JC C.V. SCR-E C.V. 901 JC JC 908 808 JC SCR-EO C.V. JC JC 801 JC SCR-N C.
GE Zenith Controls 31 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) T roubleshooting and Diagnostics HAZARDOUS VOL T AGES CAN CAUSE SEVERE INJURY OR DEA TH . These charts may indicate problems that require authorized GE Zenith service personnel.
32 GE Zenith Controls ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A) Maintenance and T esting A preventive maintenance program will insure high reliability and long life for the transfer switch.
GE Zenith Controls 33 ■ ZTSCT / ZBTSCT Operation and Maintenance Manual (71R-5000A).
A Product of GE Industrial Systems General Electric Company 830 West 40 th Street, Chicago, IL 60609 USA 773 299-6600 , Fax: 773 247-7805 www .geindustrial.
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