GE ZTX User's Manual
Contents
1. 5 Make sure that all covers and barriers are installed and properly fastened NOTE Power panels ship from GE Zenith in the Normal 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 all Normal Emergency and Load cables or bus bars c Connection of external control circuits as required Mounting Enough room should be allowed to open the cabinet doors fully for inspection and servicing of the switch per NEC and local codes NOTE When lifting the switch using a spreader bar height H must be equal to half of distance D A CAUTION Y 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 GE Zenith Controls Operation and Maintenance Manual 72R 1000 Installation conta A DANGER A HAZARDOUS VOLTAGE Can Cause Severe Injury or Death Turn OFF all power before i2. ZIX Series Automatic Transfer Switches 40 400 Amps sos 09 Operation and Maintenance Manual Authorized Service For GE parts and service call 773 299 6600 Table of Contents Introduction ii Example Systems 11 Installation 1 Partial Coverage Systems 11 Equipment Inspection and Storage 1 Total Coverage Systems 11 Final Equipment Inspection 1 Typical Diagrams 12 Mounting Ate pa eke 1 Power Circuit 5 12 Power Connections 2 Power Panel 12 Engine Start Control Connections 3 Interconnect Plug 12 Exerciser Option 4 Replacement Parts 13 Functional Test 5 Standard Transition 40 200 Amps 13 Jumper Positions 6 Standard Transition 225 400 Amps 14 Control Interface 7 Troubleshooting 15 Indicator LED s 7 Pushbuttons 7 Using the Keypad 8 Automatic Generator Exerciser 9 In Phase Monitor Operation 10 introduction GE Zenith Transf
3. 3 8 to 1 0 AWG 100 1 8 to 3 0 AWG 3 8 to 1 0 AWG 150 1 8 to 3 0 AWG 3 8 AWG to 300 MCM 200 225 250 1 6 AWG to 250 MCM 3 6 AWG to 300 MCM 300 400 1 4 AWG to 600 MCM 3 4 AWG to 300 MCM Table 1 LOAD IEC Rating Only TERMINALS tins foe te Va N OPTIONAL A4 CONTACT Install load A U NI N2 4 N3 OPERATES WHEN IN IN BR 4 UTILITY POSITION Cables REN ae first an o 285 gt i M 40 5 tii medi ey un SWITCH o POSITION 8 Be gt INDICATOR H 2 OPTIONAL CONTACT OPERATES WHEN IN GENERATOR GENERATOR POSITION TERMINALS T Load N Utility E Generator Figure 1 Power Panel E2 ZTX Operation and Maintenance Manual 72R 1000 GE Zenith Controls Installation conta 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 Control Connections Connecting Engine Start may cause Generator to start Before connecting turn Generator OFF With the Generator breaker open and the Generator control switch off install the Generator start connections Battery Connection 2 engine start terminals are clearly identified by a label on the microcontroller backplate In the case of manual transfer switches or
4. in other applications not requiring the microprocessor clearly marked terminal blocks are provided in the upper left corner of the control panel for the engine start control wires Terminals for field connections to the A3 Emergency auxiliary contacts and the A4 Normal 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 GE Zenith Controls SERIAL NUMBER RATING VOLTS AMPS SYSTEM VOLTS MODEL NUMBER Figure 3 Note N Utility Position iB D E Generator Position Figure 4 Manual operation is possible for maintenance purposes only Manual operation of the switch can be checked before it is operated electrically With all power off insert a Phillips screwdriver or equivalent size tool into the manual operator socket and operate the transfer switch between the Utility and Generator positions The transfer switch should operate smoothly without binding Return the switch to the Utility position remove the screwdriver Tightening Torque for Lugs Socket Size Across Flats 1 8 5 32 3 16 7 32 1 4 5 16 3 8 1 2 9 16 Table 2 Zenith Controls ZTX Operation and Maintenance Manual 72R 1000 Installation conta DANGER A HAZARDOUS VOLTAGE Can Cause Severe Injury or Death Turn OFF al
5. the following steps Turn In Phase Monitor OFF l Remove all power both S1 and S2 from the controller Wait at least 20 seconds 2 From the keypad hold both the BYPASS and CANCEL keys down while energizing either source If In Phase Monitor was on the Timer In phase LED will flash once for 1 second then go out The In Phase Monitor is now off Turn In Phase Monitor ON l Remove all power both S1 and S2 from the controller Wait at least 20 seconds 2 From the keypad hold both the BYPASS and CANCEL keys down while energizing either source If In Phase Monitor was off the Timer In Phase LED will light and remain lit until the keys are released The In Phase Monitor is now on Timer In phase LED ug td 60 TEST EXER BYPASS CANCEL SET TIMER Figure 9 10 ZTX Operation and Maintenance Manual 72R 1000 GE Zenith Controls B Example Systems Partial Coverage System Loads Utility Source Figure 9 Transfer Switch Utility Panel Total Coverage System oO Generator Circuit Source Breaker n Transfer Switch Utility Source Circuit ut Breaker Loads Distribution Panel Figure 10 Generator Circuit Source Breaker Main Breaker Panel All Loads GE Zenith Controls ZTX Operation and Maintenance Manual 72R 1000 118 Typical Diagrams Power Circuit Schematic 40 240 Amps fo 4 POLE OPTIO
6. transfer switch or any of its components Functional Test Functional testing of the automatic transfer switch ATS is described in this section Before proceeding read and understand all instructions and review the operation of all accessories provided To begin the test close the Utility source circuit breaker Referring to Figure 7 the controller will illuminate the Utility Available LED when proper voltage is sensed If the ATS mechanism is set on S1 the S1 position LED will also light Verify the phase to phase voltages at the Utility line terminals Next close the Generator source breaker and start the engine generator 82 Generator Available LED will illuminate when proper voltage and frequency levels are sensed After both sources have been verified shut down the engine generator and put the generator s start control in the automatic position Complete the visual inspection of the transfer switch and replace the cabinet cover or close the cabinet door Simulate a utility outage by opening the 51 Utility side breaker The delay to engine start timer P begins its timing cycle After the P timer has completed its timing cycle the engine start contacts close to start the generator When generator voltage and frequency reach the preset restore points see Table 4 the S2 Available LED illumi nates Simultaneously the delay to generator timer W begins its timing cycle When the W time delay is com plet
7. 0 416VAC 440 480VAC JP1 JP2 JP1 JP2 JP1 JP2 JP1 JP2 JP3 B B 208 A B 380 B B 440 B A 50 Hz A 220 B A 416 A B 480 A A 60 Hz B 240 A A Table 5 6 ZTX Operation and Maintenance Manual 72R 1000 GE Zenith Controls BM Control Interface 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 Indicator LEDs S1 Utility Available Green LED When on indicates source is acceptable O S1 Utility Position Green LED When on indicates ATS is connected to Utility 52 Generator Available Red LED When on indicates source is acceptable S2 Generator Position Red LED When on indicates ATS is connected to Generator Timing In phase Amber LED When blinking indicates the ATS is timing a Delay When on steady indicates the ATS is waiting for both sources to synchronize with each other TEST 27 EXER BYPASS CANCEL SET TIMER Figure 7 o Pushbuttons Q TEST Pressed and held for 1 second Simulates a power outage starts the Generator and transfers the ATS to S2 EXER SET Sets an Automatic Exerciser BYPASS TIMER Pressed while E is blinking bypasses any remaining countdown Timer CANCEL Depending on the current state of ATS operation ends specific functions or indications o W GE Zenith Controls ZTX Oper
8. 2R 1000 GE Zenith Controls Control Interface conta 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 Automatic Generator Exerciser The ZTX automatic generator Exerciser can perform a pre scheduled repeating test of the generator and or the ATS mechanism depending on which jumpers are selected on the controller board Additionally the ATS can be preset to perform the exercise every 7 14 21 or 28 days Regardless of which interval is selected all exercisers have a preset run duration of 10 minutes Selection of the exerciser interval is through three jumpers located on the controller board as shown in Figure 6 The Exerciser comes from the factory preset at 28 days and is not active To change the exerciser interval remove power from the controller completely and move the jumpers at positions jp4 and jp5 to match the selected repeat cycle from the configurations shown in Figure 7 Selecting Exerciser with or without Load Transfer The Exerciser function can be programmed to perform either a Load transfer or a non Load transfer Selecting either is done by changing the Jumper JP6 as shown in Figure 8 To change between a Load transfer or no Load transfer remove power from the controller completely and move the jumper at position JP6 Setting and Canceling an Exerciser In order to set an aut
9. ARDOUS VOLTAGE Can Cause Severe Injury or Death Turn OFF all power before installation adjustment or removal of transfer switch or any of its components System Voltage Settings Voltage Frequency Selection Jumper Settings ZTX controller boards are preconfigured to the system voltages specified at the time of order Exact system volt 240 480 120 380 ages are normally set at the factory however depend ing on the actual application and system nominal volt JP1 O O O JP1 C O age ZTX control boards are capable of being adjusted un e e O 2 Q e slightly to meet different source characteristics for n B voltage as well as frequency See Table 5 208 416 220 440 O O JP1 O Figure 6 on right shows the variations each of the 3 basic types of controllers can be adjusted to within its 42 uid O o O nominal voltage range Position Jumpers JP1 and JP2 A B A B as needed for voltage Position JP3 for frequency 50Hz 60Hz As with any other Jumper setting always remove power completely from the controller before making changes JF C B O J3 A C B C Note Do not change voltage Jumper positions without consulting service or technical support Figure 6 Arbitrarily changing voltage jumpers can adversely affect ATS operation Type 1 Type 2 Type 3 Type 4 Frequency 120V 208 240VAC 38
10. NAL NN oe NN x OPTIONAL 30 N1 2 NORMAL LINE T1 2 LOAD E1 2 EMERGENCY LINE 4 N3 lt T3 2 T2 SN NORMAL POSITION LIMIT SWITCH N A SE EMERGENCY POSITION LIMIT SWITCH BR BRIDGE RECTIFIER 5 5 MAIN TRANSFER OPERATOR N3 N1 E3 SCN CNE LIMIT SWITCHES CCN SCN 1 SCE 1 CCE Sp VE lt SWITCH SHOWN IN NORMAL POSITION NO POWER AVAILABLE CNE N2 5 SCN2 SCE 2 lt E2 NS o SN OO O SN SCOM 9 SE 9 9 lt SE 11 Power Panel Layout Interconnect Plug LOAD TERMINALS T1 T2 T3 NN 5 CCN N1 10 SN N2 UTILITY TERMINALS N1 N2 N3 NN SCOM SE CCE 1 2 E1 6 d 4 9 Llig 4 4 Oo X OPTIONAL 30 4 3 2 SCN 2 SCE 2 SCN 1 SCE 1 E1 E2 E3 NN GENERATOR TERMINALS 2 N3 E2 1 Figure 12 Figure 13 m12 ZTX Operation and Maintenance Manual 72R 1000 GE Zenith Controls Replacement Parts Standard Transition 40 to 200 Amps BR CN CE SP L SCN SCE Fi
11. ation and Maintenance Manual 72R 1000 7 Control Interface conta 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 Using the Keypad Controls TEST KEY The TEST KEY initiates a transfer sequence to S2 and holds the ATS in that mode until either the CANCEL key is pressed or a situation arises to cause the ATS to go back to 51 ie S2 actually fails In order to perform a TEST the ATS must be on 51 and 51 must qualify as a good source by being above the FAIL thresholds for both Voltage and Frequency see Table 2 Once the TEST KEY is pressed for at least 1 Sec the ATS will begin the Timer Sequence see figure 5 attempt to start S2 generator source and if S2 qualifies as a good source transfer the load to S2 There is no P Time in a test The TEST key is typically used to perform a system operational or maintenance test or to purposely cause and hold the Load off of S1 If during the TEST S2 fails and 51 is available the TEST will be cancelled and the Load will be immediately retransferred to 51 EXER SET Whenever it is required to have a regular test performed automatically on a repeating basis the Automatic Exerciser function can be setup using this key Depending on the jumper settings shown in Figure 8 the ATS can be programmed to perform a repeating 7 14 21 or 28 day e
12. ed the ATS will transfer to Generator the S1 position LED goes off and the 52 position LED illuminates Reclose the Utility breaker to retransfer to utility The delay to utility timer T begins its timing cycle Table 3 When the T timer has completed its timing cycle the ATS will transfer The optional S2 position LEDs go off and the S1 position LED illuminates The delay engine stop timer U begins its timing cycle The generator runs unloaded for the duration of the U timing cycle When the timer completes its timing cycle the generator will stop The S2 Available LED goes off ATS Timing Cycle Action P Timer W Timer Timer UTimer 5 sec 0 5 min 51 Fail or Time Delay Time Delay Time Delay Time Delay Test or 52 Start 52 Stable 51 Stable 52 Stop Exerciser 2 Ss Transfer to S2 Y Retransfer to S1 Engine Cool Down S1 returns orTest Exerciser Ends Table 3 Preset Settings Utility Generator S1 Fail Voltage 8096 Nominal Line Voltage S2 Fail Voltage 8096 Nominal Line Voltage S1 Restore 9096 Nominal Line Voltage 52 Restore Voltage 9096 Nominal Line Voltage 1 Fail Frequency 8096 52 Fail Frequency 9096 S1 Restore Frequency 9096 S2 Restore Frequency 9596 Timers PTimer WTimer TTimer UTimer 5 sec W 20 sec T 5 min U 5 min Table 4 GE Zenith Controls ZTX Operation and Maintenance Manual 72R 1000 5m Installation conta A DANGER A HAZ
13. er Switches are used to provide a continuous source of power for lighting and other critical loads by auto matically 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 All 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 All references 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 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 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 switc
14. f the load which is especially beneficial where conveyors pumps and other motor loads are involved ZTX indicates it is waiting for the sources to synchronize by holding the Timer In Phase LED on When both sources have syn chronized the ATS will transfer the Load within 20 of each other if sources are within 2Hz differential and the Timer In Phase LED will turn off If the sources fail to synchronize after 1 minute the controller will blink the Timer In Phase LED once alerting the operator that the In Phase monitor function can be bypassed by pressing the CANCEL key causing an immediate trans fer see Cancel Key function If the CANCEL key is not pressed the ZTX will continue to wait for an in Phase condition to occur In a typical ATS application one source is on the utility and one source is a backup system such as a gas or diesel generator Because sources have a slight frequency difference sources come in and out of phase If ZTX In Phase Monitor is on The ZTX ATS Controller monitors both sources and transfers the Load at the ideal time to minimize back EMF conditions In the case of both sources coming from the same source or one configured as WYE and the other as DELTA the frequency difference is fixed at the same frequency or fixed but 30 degrees out of phase In those cases In Phase Monitor can be turned off In Phase Monitor is turned on as default from the factory To turn In Phase Monitor OFF or ON take
15. gure 14 DESCRIPTION VOLTAGE 40TO 200 AMPS 120 208 220 Solenoid 240 380 416 440 480 Solenoid Plunger and Link ALL 57P 1030 SCN SCE Coil Cutout Switch 120 480V L 3078 SCN SCE Coil Cutout Switch 600V L 4027 BR Rectifier ALL PS 5076 Auxiliary Contacts L 3078 Table 7 GE Zenith Controls ZTX Operation and Maintenance Manual 72R 1000 138 Replacement Parts vona Standard Transition 225 to 400 Amps BR CN CE E1 E2 EN Figure 15 Recommended Stock Numbers by Amperage LET Description as Spares 225 250 260 300 400 N 1 2 3 Cable Connection Lug S 2701 5 2701 5 2701 1 2 3 1 2 3 Wire Size 6 250 MCM 4 600 MCM 4 600 MCM CN CE Solenoid 208 220 240 2246 SN SE Position Sense Limit Switch L 3078 A3 A4 Auxiliary Contacts BR Rectifier 5 5076 Table 8 m14 ZTX Operation and Maintenance Manual 72R 1000 GE Zenith Controls Troubleshooting 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 Service must be performed by qualified personnel Symptom 51 52 Available LED not lit ATS will not retransfer Load back to Utility ATS does not transfer Load to 52 generator 52 Generator will not start 2 Generator wi
16. h 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 enclo sure 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 it is necessary to 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 20 C to 65 C 5 to 95 75 C 4 F to 149 F non con 22 F to densing 167 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 2 Verify that all cabled connections are correct 3 Check engine start connections and verify the correct connection of all control wires 4 Check the lug torque values of the power connections NOTE Lug torque values are specified in the power panel manual
17. l power before installation adjustment or removal of transfer switch or any of its components ATTENTION This applies only to the switches with the RM4 CAT exerciser option Only after ATS installation connect a commercial grade alkaline 9V battery to the MX60 controller via the har ness connected to the controller The battery should be placed in the holder installed just above the controller The battery is used to maintain the exerciser function in the event of power outage The battery should be replaced at least once a year If the battery is not Battery and Holder Battery Harness MX60 Controller Under Cover installed and or replaced as recommended an exerciser set from the front panel will lose its settings during power outages and the exerciser will not work Note Battery life if reduced if neither source is avail able Typical battery life when both sources are unavailable is 21 days Should the battery connection become disconnected in shipping take the controller cover off and plug the harness into the receptacle in the top right corner of the MX controller as shown in figure 2 and 5 Reinstall the cover and connect the battery HAZARDOUS VOLTAGE LP Figure 5 m4 ZTX Operation and Maintenance Manual 72R 1000 GE Zenith Controls Installation conta DANGER A HAZARDOUS VOLTAGE Can Cause Severe Injury or Death Turn OFF all power before installation adjustment or removal of
18. ll not shut down All LEDs off ATS will not transfer in phase ATS will not retain a Set Automatic Exerciser Timer In Phase LED constantly on 51 and 52 LEDs Blinking 51 Position LED Blinking 52 Position LED Blinking Both 51 and 52 Positioin LEDs Blinking Possible Cause Sources either fully or partially unacceptable 51 52 breakers open T Timer has not expired Automatic Exerciser is in process 1 Utility fully or partially unacceptable 52 Generator fully or partially unacceptable Motor loads on system creating enough back EMF to keep missing phase from falling below Fail setpoint X1 or X2 not connected U Timer not expired Automatic Exerciser in process Keypad connector unplugged at Controller Both source breakers open In Phase monitor not on Frequency difference between S1 and 52 greater than 2Hz Battery dead or missing Both sources locked in frequency or one source greater than 20 out of phase Phase Rotation Mis match between sources SN limit switch bad or intermittent SE Limit switch bad or intermittent Solenoid bad or disconnected ATS contactor in mid position Corrective Action Check for under voltage Check for missing phase s Check for under frequency Set motor saver to dropout below ATS Fail setpoint Check Generator Start wiring Wait for U timer to expire Turn on In Phase monitor Adjust Generator governor to hold freqency closer to Utility Replace batter
19. nstallation adjustment or removal of transfer switch or any of its components Connect the Normal Emergency and Load conductors 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 Power Connections GE Zenith transfer switches are supplied with UL listed solderless screw type terminals as standard for the Normal Emergency and Load power connections Table 1 lists the number and sizes of cable lugs supplied as standard for each switch amp rating Do not run cables or wiring behind front connected transfer switches Switch Size Utility Generator and Load Terminals Fully Rated Neutral Bar When Required Amps able Fer role ange Ire 1265 0 01 Lables ange Ire 51265 Cable Per Pol f Wire Si No of Cabl f Wire Si 40 1 8 to 3 0 AWG 3 8 to 1 0 AWG 80 1 8 to 3 0 AWG
20. omatic Exerciser choose the exer ciser interval and whether a Load transfer or no Load transfer is desired as stated above An exercise can only be set if S1 is available and the ATS and Load is on 51 source To establish an Exerciser At the exact time desired press and hold the EXER SET key for at least 1 second The ATS will immediately start an initial exercise by attempting to start the generator running through the Timers figure 3 and will either only start the generator or will start the generator and transfer the Load from 51 to 59 for the time duration of the exerciser interval 10 minutes Once the Exercise is completed the ATS will continue the timing sequence and retransfer the Load back to S1 cool down the gen erator and terminate until the next scheduled interval time Any time an Exerciser has been established and is scheduled the 52 Available and S2 position LEDs quick ly blink approximately every 4 seconds as a reminder However if S2 source becomes available during the time the ATS is waiting for the next impending exercise the ATS will not show a blinking indication but instead will show the 52 Available LED solidly on to indicate the true condition of 52 Any Exercise event can be prema turely canceled by pressing the CANCEL key Note pressing the CANCEL key in the middle of an scheduled event does not cancel a set Exerciser but only cancels the current event To completely clear an already
21. set Exerciser A set Exerciser can be completely cleared out of memory by pressing and holding the CANCEL key for at least 10 Seconds causing the blink indication to stop If S2 fails to meet the criteria for a good source during an Exercise attempt the Controller will continue to hold the P contacts closed for the duration of the Runtime timer then wait for the next scheduled exercise If S2 fails during an Exercise the Controller will abort that exercise and wait till then next scheduled exercise Automatic Exerciser Jumper Settings 7 Day JP4 JP4 14 Day JP5 Q O O JP5 Q O O A B A B 21 Day 28 Day J4 J4 O O JP5 O O 5 O O A B A B JP6 O O Q No Load JP6 O Load A B Figure 8 GE Zenith Controls ZTX Operation and Maintenance Manual 72R 1000 9m Control Interface conta 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 In Phase Monitor ZTX ATS senses when the sources as far out as 2 Hz or as close as 01Hz in frequency differential of each other and transfers the load to and from either source in phase If turned on R50 In Phase monitor tracks the frequency of both the Utility and Generator sources allowing a smooth synchronous transfer o
22. xercise at a particular time of day To initiate an Automatic Exercise the EXER SET key is pressed and held for at least 1 Sec at the desired exercise time The ATS will begin the Timer Sequence attempt to start S2 generator source and if S2 qualifies as a good source transfer the Load to S2 for the dura tion of the Generator Run Time After the Generator Run time has expired the timing sequence will restart and the Load will be transferred back to 51 after T time ending by running the U time and finally ending the call for S2 TIMER BYPASS This key is used to bypass truncate any of the running timers shown in Table 3 Whenever the Timing Inphase LED is blinking pressing the TIMER BYPASS will end that particular delay and cause the ATS con troller to immediately jump to the next sequence step Note The BYPASS key cannot be used to truncate an In phase transfer sequence or the P Timer CANCEL The CANCEL key performs 3 different cancel actions depending on the ATS current state of operation l Ifthe ATS is currently performing a TEST the CANCEL key will cancel the test 2 Ifan Automatic Exerciser has been set press ing and holding the CANCEL key for 10 Sec will cancel and remove the set exercise 3 Ifafter in phase monitor has passed 1 minute waiting for sources to synchronize will cause transfer immediatly which may result in an out of phase transfer ms ZTX Operation and Maintenance Manual 7
23. y with a fresh industrial grade Alkaline battery Turn In Phase monitor off Rewire sources to be same rotation Check connection or SN limit switch Check connection or SE limit switch Requires CANCEL key to clear check Solenoid Requires CANCEL key to clear Check both limit switches Table 9 GE Zenith Controls ZTX Operation and Maintenance Manual 72R 1000 15H C3 GE Zenith Controls A Product of GE Consumer amp Industrial General Electric Company 830 West 40 Street Chicago IL 60609 USA 773 299 6600 Fax 773 247 7805 www geelectrical com
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