Emerson 7ACTB Switch User Manual
Contents
1. 1 HELP customercare asco com 800 800 ASCO Printed in U S A INDEX inspection 3 1 installation 1 1 isolating the ATS 3 2 lights 1 3 1 4 lubrication 2 1 M maintenance preventive 2 1 maintenance handle 2 2 warning 2 2 manual load transfer 2 2 warning 2 2 N nameplate cover Normal Source Accepted light 1 3 O operation electrical 1 4 manual 2 2 warning 2 2 P parts 2 1 phase rotation check 1 3 preventive maintenance 2 1 problem 2 2 R rating label cover removal of shipping angles 1 1 removal of shipping skid 1 1 replacement parts 2 1 return to service 3 3 S service ASCO Services Inc ASI 2 1 settings see Controller User s Guide shipping angles 1 1 warning 1 1 shipping skid 1 1 T test functional 1 3 14 testing power cables 1 2 time delays 2 1 see Controller User s Guide TS Locked Out light 2 2 Transfer Control selector switch Retransfer Delay Bypass 1 4 Transfer Test 14 Transfer Switch Connected To Emergency light 1 4 Transfer Switch Connected To Normal light 1 4 transfer test 1 4 2 1 transfer to emergency 1 4 2 1 transfer to normal 1 4 2 1 troubleshooting 2 2 V voltage checks 1 3 voltage pickup and dropout settings see Controller User s Guide Copyright ASCO Power Technologies L P 20072. CLOCKWISE unfold crank N counterclockwise draws out transfer switching device Figure 3 6 Isolation Handle NOTE In the TEST position the transfer switching device solenoid operator circuit is energized through secondary disconnects A DANGER Hazardous voltage capable of causing electrical shock burns or death do not touch any control circuit terminals Automatic Transfer Switch Figure 3 4 CONNECTED to TEST position 3 Continue turning Isolation Handle counterclockwise approx 7 turns until the window shows ISOLATE Bypass Switch Turn crank counter clockwise until window o shows ISOLATE Automatic Transfer Switch Figure 3 5 TEST to SOLATE position 4 Open the lower enclosure door Pull out the side rail carriage then roll out the transfer switch It can be safely inspected in this position The transfer switch can also be removed for easier maintenance opera tions Figure 3 7 Transfer switching device isolated and pulled out for inspection See page 2 2 for maintenance handle use A lifting yoke kit 607064 is available to facilitate lifting by using an overhead crane or similar equipment Transfer Switch weighs 350 450 Ibs Use lifting device 607064 or other device capable of lifting this weight to avoid personal injury or equipment damage BYPASSING amp ISOLATING continued RETURN TO SERVICE This procedure explains how to return the automa
3. 2 The two harness plugs and sockets are keyed Care fully align the plugs with the sockets and press straight in until the latches click 3 Close the enclosure doors Follow Return to Service instructions on page 3 3 TESTING amp SERVICE continued TROUBLE SHOOTING Note any optional accessories that may be furnished on the ACTB and review their operation Refer to any sepa rate drawings and or instructions that may be packed with the ACTB Table 2 1 Trouble Shooting Checks A DANGER Hazardous voltage capable of causing shock burns or death is used in this switch Do not touch the power or load terminals of the bypass switch or transfer switch PROBLEM CHECK IN NUMERICAL SEQUENCE 1 OPERATION 2 GEN SET 3 VOLTAGE Engine generator set does not start when the Transfer Control switch is turned and held in Transfer Test position or when normal source fails Hold Transfer Test switch 15 seconds or the outage must be long enough to allow for Feature 1C time delay plus engine cranking and starting Starting control must be in the automatic position Batteries must be charged and connected Check wiring to engine starting contacts Transfer switch does not transfer the load to the emergency source after the engine generator set starts Wait for Feature 2B time delay to time out Generator output circuit breaker must be closed Generator frequency must be at least 95
4. Isolation Switch ACTB consists of an upper bypass isolation switch a transfer switch a monitoring and transfer controller and door mounted controls The ACTB is factory wired and tested Installation requires removal of the shipping skid then securing the enclosure to the supporting foundation Remove the Shipping Skid Open the front lower door and remove the two front lag screws securing the enclosure to the wood skid Next remove the rear lower panel and remove the two rear lag screws securing the enclosure to the wood skid Supporting foundation and mounting The supporting foundation for the enclosure must be level and straight Allow at least 35 inches in front of the enclosure for draw out of the Transfer Switch Refer to the enclosure outline drawing included with the 7000 Series ACTB for all mounting details including door opening space If bottom cable entry is used the foundation must be prepared so that the conduit stubs are located correctly Refer to the appropriate enclosure outline drawing for specified cable entrance area and location Provide cable bending space and clearance to live metal parts Whena concrete floor is poured use interlocking conduit spacer caps or a wood or metal template to maintain proper conduit alignment Mounting Refer to the enclosure outline drawing furnished with this switch and mount the 7000 Series ACTB according to the details and instructions shown on the drawing Remove thre
5. To Normal Emergency To E Normal Bypass Emergency Source Source Accepted Accepted iii Figure 1 3 Standard controls and indicators observe these lights Functional Test Read all instructions on the Wiring Diagrams and labels affixed to the ACTB Note the control features that are provided and review their operation before proceeding After installing the ACTB check the following Bypass Handle should be in the OPEN position Isolation Handle should be in the CLOSED position CN transfer switch should be CLOSED CE transfer switch should be OPEN If handles are not in correct positions follow instructions for Bypassing and Isolating the automatic transfer switch in Section 3 Do not force the handles Electrical interlocks prevent a wrong sequence of operation 1 Voltage Checks First check nameplate on transfer switch rated voltage must be the same as normal and emergency line voltages DANGER Use extreme caution when using a meter to measure voltages Do not touch power terminals shock burns or death could result A Perform steps 1 6 at the right Observe the status lights See Figure 1 3 E Black square means light is on O White square means light is off Tf necessary adjust voltage regulator on generator per the manufacturer s recommendations The ACTB will respond only to rated voltage specified on the nameplate Now continue to 2 Electrical Operation
6. of nominal 57 Hz for a 60 Hz system Voltmeter should read at least 90 of nominal phase to phase voltage between terminals EA and EC or EL1 and EL2 for 2 pole switches Transfer switch does not transfer the load to normal source when normal returns or when the Transfer Control switch is released Wait for Feature 3A time delay to time out Voltmeter should read at least 90 of nominal phase to phase voltage between terminals NB and NC NC and NA and NA and NB or NL1 and NL2 for 2 pole switches Gen does not stop after load retransfer to normal source Wait for Feature 2E time delay to time out Starting control must be in the automatic position Failure to Synchronize light comes on Conditions of Normal or Emergency Sources not suitable for closed transition transfer Recheck voltage and frequency of both sources Press Alarm Reset pushbutton Extended Parallel Time light comes on CN and CE contacts are closed longer than setting in the Control Panel Open the discon nected source circuit breaker then call your nearest ASCO Service Center for assistance TS Locked Out light comes on Transfer lockout operation has occured transfer switch is disabled from automatic operation Open the disconnected source circuit breaker then call your nearest ASI for assistance These are factory settings Refer to Controller User s Guide If the problem is isolated to ci
7. reliability of the connection depends on how clean and how tight the joint is Table 2 1 Tightening torque values for bolted joints Bolt Diameter Recommended Grade 5 hardware Tightening Torque in inches in foot pounds 5 16 12 3 8 20 1 2 50 5 8 95 Harnesses All internal connections are made at the factory The bypass switch transfer switch and control panel are joined together by an interconnecting wire harness The disconnect plugs are already engaged on enclosed switches For open type switches the plugs must be engaged after installation is completed Align harness plugs with sockets in the control and push them together until they are secure Controller Ground A grounding wire must be connected to the controller s lower left mounting stud Because the controller is mounted on the enclosure door a conductive strap must be used between the enclosure and the door This connection provides proper grounding which does not rely upon the door hinges Engine Starting Contacts and Auxiliary Circuits The engine control contact signal connections and auxiliary circuits are located on terminal block TB as shown on the Wiring Diagram provided with the ACTB Connect the signal wires to the appropriate terminals INSTALLATION continued ASCO 7000 SERIES EMERSON Network Power Power Transfer amp Bypass Switch Transfer Transfer Switch Transfer Switch Connected Connected
8. ASCO 7000 Series 7ACTB Operator s Manual Automatic Closed Transition Transfer amp Bypass lsolation Switches G design 1000 through 3000 amp sizes A DANGER DANGER is used in this manual to warn of high voltages capable of causing shock burns or death WARNING is used in this manual to warn of possible personal injury CAUTION is used in this manual to warn of possible equipment damage TABLE OF CONTENTS section page Refer to the outline and wiring drawings provided with your 7000 Series ACTB for all installation and connection details and accessories Refer to Group 5 Controller User s Guide 381333 126 for ATS status display messages time delays pickup amp dropout settings and adjustments An experienced licensed electrician must install the 7ACTB Rating Label Each 7000 Series 7ACTB contains a rating label to define the load and fault circuit withstand closing ratings Refer to the label on the Transfer Switch for specific values ASCO Fes 50 Hanover Road Flornam Park New Jersey 07932 1591 USA Technologies For sales or service call 1 800 800 2726 ASCO www ascopower com ASCO POWER TECHNOLOGIES CANADA PO Box 1238 17 Airport Road Brantford Ontario Canada N3T 5T3 telephone 519 758 8450 fax 519 758 0876 for service call 1 888 234 2726 ASCO www asco ca INSTALLATION MOUNTING sr
9. Emergency on the door This is the position of the Transfer Switch If itis not in the same position as the Bypass Handle change the position of the Transfer Switch as follows To change the position of transfer switch Operate to NORMAL OperatetoOEMERGENCY Turn Transfer Control Turn Transfer Control switch to Retransfer switch to Transfer Test Delay Bypass hold 15 seconds Connected To Normal Connected To Emergency light should come on light should comes on If Feature 2B time delay is used there will be a delay before transfer to Emergency NOTE With Normal available the automatic transfer switch will not stay in the emergency position unless Feature 3A time delay is used at least 30 seconds Do not close the isolation contacts unless the Transfer Switch ATS and Bypass Switch are in the same position 5 When the transfer switch is in the same position as the Bypass Switch handle continue turning the Isolation Handle clockwise about 16 turns until the window shows CONN connected Bypass Switch Turn crank clockwise until window shows CONN connected Figure 3 10 TEST to CONNECTED position Now continue to the next page for instructions on how to return the Bypass Handle to the OPEN postition BYPASSING amp ISOLATING continued RETURN TO SERVICE continued This procedure explains how to return the Bypass Switch Handle to the OPEN position The Bypass Hand
10. Handle amp turn it counter clockwise Figure 3 12 Un Bypass Normal To Un Bypass Emergency Source Load connected to Emergency Source The Transfer Switch Connected To Emergency light is on and Transfer Switch Connected To Normal light is off Pull out the Bypass Handle then turn it counterclock wise until Bypass Switch Position shows OPEN green indicator The Unit Not in Automatic light should be off Bypass Switch Pull out Bypass Handle amp turn it counter clockwise Figure 3 13 Un Bypass Emergency The Automatic Closed Transition Transfer amp Bypass Isolation Switch should be left in this position NOTE When Accessory 66A reversed Normal amp Emergency connections is specified the handle push pull operation is reversed Follow instructions on the door 3 4 A Alarm Reset pushbutton 1 4 2 2 auxiliary circuits 1 2 B bus connections 1 2 bypassing the ATS 3 1 C catalog number cover cleaning 2 1 closed transition transfer 1 4 connections line 1 1 controller disconnecting 2 1 see Controller User s Guide E electrical operation 1 4 Emergency Source Accepted light 1 3 Engine Control selector switch Auto position 2 1 engine starting contacts 1 2 Extended Parallel Time light 2 2 F Failure to Synchronize light 2 2 foundation 1 1 frequency generator 2 2 functional test 1 3 1 4 H harness 1 2 disconnect plugs 2
11. an cloth Check the transfer switch contacts Remove transfer switch barriers and check the condition of the contacts Replace contacts when pitted or worn excessively Reinstall the barriers carefully Maintain transfer switch lubrication If switch is subjected to severe dust or abnormal operating con ditions renew factory lubrication on all movements and linkages Relubricate solenoid operator if TS coil is replaced Don t use oil order lubrication kit 75 100 Check all cable connections amp retighten them REPLACEMENT PARTS Replacement parts are available in kit form When or dering parts provide the Serial No Bill of Material No BOM and Catalog No from the transfer switch name plate For service call ASCO Services at 1 800 800 2726 you will be put in contact with your local ASI office DISCONNECTING THE CONTROLLER The harness disconnect plugs are furnished for repair purposes only and should not have to be unplugged If the control panel must be isolated follow these steps A DANGER Bypass lIsolation Switch is energized Do not touch isolation contact fingers shock burns or death could result Disconnecting the Plugs 1 Bypass and Isolate the Automatic Transfer Switch 2 3 Open the upper enclosure door Separate the two quick disconnect plugs by squeez ing the latches Do not pull on the harness wires Reconnecting the Plugs 1 The ATS should be still bypassed and isolated
12. e Load connected to Emergency Source The Transfer Switch Connected To Emergency light is on and Transfer Switch Connected To Normal light is off Pull out the Bypass Handle all the way then turn it clockwise until Bypass Switch Position shows CLOSED on EMERGENCY yellow indicator The red light Unit Not In Automatic will flash Bypass Switch Pull out Bypass Handle amp turn it clockwise Figure 3 3 Bypass to Emergency The automatic transfer switch can now be put in the TEST or OPEN position See ISOLATING on page 3 2 NOTE When Accessory 66A reversed Normal amp Emergency connections is specified the handle push pull operation is reversed Follow instructions on the door 3 1 BYPASSING amp ISOLATING continued ISOLATING THE ATS Isolating is required before any service work can be performed on the automatic transfer switch ATS Refer to Figures 3 4 3 5 3 6 and 3 7 1 Bypass the closed automatic transfer switch contacts See BYPASSING on page 3 1 Align position indicator Do not leave the handle in an intermediate position 2 Turn the Isolation Handle counterclockwise approx 16 turns until window shows TEST The ATS can be tested now without load interruption see page 2 1 Bypass Switch Turn crank counter clockwise until window shows TEST position window ISOLATION HANDLE CONN TEST ISOLATE TO CONNECT TO ISOLATE TRANSFER TRANSFER WITCH TURN
13. e Shipping Angles from the Transfer Switch Open the lower front door The Transfer Switch carriage is secured to the frame for shipment Remove the three shipping angle 1 upper left 1 upper right 1 lower right To prevent serious damage remove three shipping angles from the Transfer Switch carriage Do not turn the Isolation Handle until they are removed INSTALLATION PWEN ENE Figure 1 1 Typical enclosure remove 3 shipping L angles from transfer switch Figure 1 2 Remove three shipping L angles INSTALLATION continued A DANGER De energize the conductors before making any line or auxiliary circuitry connections Be sure that Normal and Emergency line connections are in proper phase rotation Place engine gen erator starting control in the OFF position Make sure engine generator is not in operation Testing Power Conductors Do not connect the power conductors to the ACTB until they are tested Installing power cables in conduit cable troughs and ceiling suspended hangers often requires considerable force The pulling of cables can damage insulation and stretch or break the conductor s strands For this reason after the cables are pulled into position and before they are connected they should be tested to verify that they are not defective or have been damaged during installation Protect the switch from construction grit and metal chips to prevent malfunction or shortened lif
14. e of the ACTB switch Connecting Power Conductors A Wiring Diagram is furnished with the ACTB All wiring must be made in accordance with the local codes After the power cables have been tested connect them to the appropriate terminal lugs on the Bypass Switch as shown on the wiring diagram provided with this ACTB Make sure that the lugs provided are suitable for use with the cables being installed Standard terminal lugs are solderless screw type and will accept the wire sizes listed on the drawings provided with the ACTB Be careful when stripping insulation from conductors avoid nicking or ringing the conductor Remove surface oxides from conductors by cleaning with a wire brush Follow conductor manufacturer s instructions when aluminum conductor is used Apply joint compound to conductor then carefully wipe away excess compound Tighten the cable lugs to the torque specified on the rating label Be sure that the Normal and Emergency power connections are in proper phase rotation Bus Connections If bus connection is used use SAE grade 5 hardware to connect bus to appropriate terminal plates on bypass switching device Wipe off bus surfaces before they are joined If bus is dirty gently clean surfaces with a non flammable solvent Avoid touching cleaned surfaces Do not breathe cleaning solvent vapors Use SAE grade 5 hardware and tighten the bolted joints to the torque specified in Table 2 1 The
15. ee E eae ne packers 1 1 Do hol exceed the valuss on the tating label Power Connections terrene eee 1 2 Exceeding the rating can cause personal injury Engine Starting amp Auxiliary Circuits 1 2 or serious equipment damage Functional Test 000 eae 1 3 1 4 TESTING amp SERVICE Nameplate Transfer Test amp Preventive Maintenance 2 1 The Transfer Switch nameplate includes data for each Trouble Shooting sssssrsrrrrrrrn 2 2 specific 7000 Series 7ACTB Use the switch only within BYPASSING amp ISOLATING the limits shown on this nameplate A typical Catalog Bypassing the ATS 5 3 1 Number is shown below with its elements explained Isolating the ATS 00e eee 3 2 ee Return to Service 0005 3 3 3 4 Catalog Number Identification Typical 7000 Series ACTB catalog no for overlapping INDEX cs piak inaen desea vee back cover neutral 3 pole 1200 amp 480 V in Type 1 enclosure G7ACTB C 3 1200 N 5 C Neutral Phase Poles Amperes Voltage Controller Enclosure A solid 2 single 1000 A115 J 400 5 standard C type 1 B switching 3 three 1200 B 120 K 415 5X if F type 3R C overlapping 1600 C 208 L 440 accessories G type 4 ordered blank none 2000 D 220 M 460 L type 12 3000 E 230 N 480 blank open type F 240 P 550 G 277 Q 575 H 380 R 600 381333 136 C amp EMERSON SECTION 1 The ASCO 7000 Series Automatic Closed Transition Transfer amp Bypass
16. icator and the Isolation Handle must be in the CLOSED position window See Figures 3 1 3 2 and 3 3 BYPASS Indicator shows green OPEN when the ATS is not bypassed To Bypass Normal push in handle all the way amp turn it clockwise BYPASS SWITCH HANDLE EMERGENCY You can only bypass to the same source that the Transfer Switch is connected Solenoid interlock prevents incorrect operation 1 Observe which Transfer Switch Connected To light is on Normal or Emergency on the door This is the position of the automatic transfer switch 2 Bypass to the same source as connected to transfer switch as follows select Normal or Emergency Indicator shows yellow EMERGENCY CLOSED when ATS is bypassed to Emergency or yellow NORMAL CLOSED when ATS is bypassed to Normal Source To Bypass Emergency pull out han dle all the way amp turn it clockwise Figure 3 1 Bypass Handle and position indicators To Bypass Normal Source Load connected to Normal Source The Transfer Switch Connected To Normal light is on and Transfer Switch Connected To Emergency light is off Push in the Bypass Handle all the way then turn it clockwise until Bypass Switch Position shows CLOSED on NORMAL yellow indicator The red light Unit Not In Automatic will flash Bypass Switch Push in Bypass Handle amp turn it clockwise Figure 3 2 Bypass to Normal To Bypass Emergency Sourc
17. ion of the Transfer Switch and Control Panel Turn the Engine Con trol switch to Auto and put the engine generator starting control at the engine generator set in automatic mode In the following test the generator will start the load will be transferred to the Emergency source then back to the Normal source An interruption to the load will occur unless the the Transfer Switch contacts are bypassed be fore the test See pages 3 1 and 3 2 for bypassing amp iso lating instructions if no interruption of load is required Be sure to close the enclosure door before proceeding to prevent personal injury in case of electrical system fault Perform the four step Electrical Operation Transfer Test procedure on page 1 4 PREVENTIVE MAINTENANCE Reasonable care in preventive maintenance will insure high reliability and long life for the 7000 Series ACTB An annual preventive maintenance program is recom mended ASCO Services Inc ASI is ASCO Power Technologies national service organization ASI can be contacted at 1 800 800 2726 for informa tion on preventive maintenance agreements Checklist for Yearly Inspection A Hazardous voltage capable of causing shock burns or death is used in this switch Deenergize both Normal Emergency power sources before performing inspections DANGER Clean the ATS enclosure Brush and vacuum away any excessive dust accumulation Remove any mois ture with a cle
18. le must be in the CLOSED position yellow indicator on NOR MAL or EMERGENCY and the Isolation Handle must be in the TEST position window If the handles are not in these positions refer to Return to Service on page 3 3 See Figures 3 11 3 12 and 3 13 Indicator shows green OPEN when the ATS is not bypassed To un Bypass Normal push in handle all the way amp turn it counterclockwise You can only bypass to the same source that the ATS is connected Solenoid interlock prevents incorrect operation 1 Observe which Bypass Switch Position indicator is yellow VORMAL or EMERGENCY at the Bypass Switch Handle This indicates the source connected to the load Un Bypass to same source as the Bypass Switch Position as follows select Normal or Emergency Indicator shows yellow EMERGENCY CLOSED when ATS is bypassed to Emergency or yellow NORMAL when ATS is bypassed to Normal Source To un Bypass Emergency pull out handle all the way amp turn it counterclockwise Figure 3 11 Bypass Handle and position indicators To Un Bypass Normal Source Load connected to Normal Source The Transfer Switch Connected To Normal light is on and Transfer Switch Connected To Emergency light is off Push in the Bypass Handle then turn it counterclockwise until Bypass Switch Position shows OPEN green indica tor The Unit Not in Automatic light should be off Bypass Switch Push in Bypass
19. on next page Control Retransfer Transfer Delay ast HEIDE 15 FECONDS 1 3 Closed Transition Alarms Extended Parallel To Time i Alarm Reset Push To Reset Failure Synchronize TS Locked Out Push To Reset Closed Transition Bypass Push To Bypass Close the normal source circuit breaker The Transfer Switch Connected To Normal and the Normal Source Accepted lights should come on Use an accurate voltmeter to check phase to phase and phase to neutral voltages pres ent at the transfer switch normal source terminals Close the emergency source circuit breaker Turn the Engine Control switch to Run to start the generator The Transfer Switch Connected To Normal amp Emergency Source Accepted lights should come on Use an accurate voltmeter to check phase to phase and phase to neutral voltages pres ent at the transfer switch emer gency source terminals Use a phase rotation meter to check phase rotation of emer gency source it must be the same as the normal source ABC Turn Engine Control switch to Auto to stop the generator The Emergency Source Accepted light should go off Then put the starting control selector switch on generator set in automatic position Close enclosure door observe these lights INSTALLATION continued ASCO 7000 SERIES Power Transfer amp B
20. rcuits on the controller or the transfer switch call your local ASCO Power Technologies sales office or ASI at 1 800 800 2726 Furnish the Serial No and Catalog No from the transfer switch nameplate MANUAL LOAD TRANSFER This procedure manually transfers load to other source if the Transfer Switch or Control Panel are out of service Close enclosure doors to prevent personal injury in case of electrical system fault 1 Besure that the Bypass Handle is CLOSED on either Emergency or Normal see page 3 1 2 Be sure that the Isolation Handle is in the TEST or ISOLATE position see page 3 2 3 Turn the Bypass Handle counterclockwise to OPEN the Bypass Switch Then Bypass to the other source see page 3 1 MAINTENANCE HANDLE A DANGER Bypass and isolate the Transfer Switch before using the maintenance handle See pages 3 1 and 3 2 Remove the hub and handle after using them and store on frame Turn counterclockwise to OPEN contacts Turn clockwise to CLOSE contacts slide hub onto shaft amp insert pin Pull out shaft to operate Emergency contacts 2 2 Grasp handle firmly Push in shaft to operate Normal contacts SECTION 3 BYPASSING amp ISOLATING BYPASSING THE ATS This procedure explains how to Bypass the closed automatic transfer switch contacts Bypassing is required before the ATS can be tested or isolated The Bypass Handle must be in the OPEN position green ind
21. terclock wise until the OPEN indicator shows green This completes the Functional Test of the ACTB Closed Transition Alarms Extended Failure Parallel To Time Synchronize Alarm Reset Push To Reset operate this switch TS Locked Out Push To Reset Closed Transition Bypass Push To Bypass Turn and hold Transfer Control switch clockwise to Transfer Test until the engine starts and runs within 15 sec The Emergency Source Accepted light should come on Transfer switch CE closes and then Transfer Switch CN opens closed transition overlap The Transfer Switch Connected to Emergency light should come on and the Transfer Switch Con nected to Normal light should go off you might see and hear the brief overlap transfer Transfer switch will operate back to Normal position after Feature 3A time delay For im mediate retransfer turn Transfer Control counterclockwise to Retransfer Delay Bypass The Transfer Switch Connected To Normal light should come on Transfer Switch Connected to Emergency light should go off The engine generator will stop after the Feature 2E time delay unloaded running engine cool down The Emergency Source Accepted light should go off SECTION 2 TESTING amp SERVICE TRANSFER TEST Test the Automatic Closed Transition Transfer Switch portion of the 7000 Series ACTB at least once a month This procedure checks the electrical operat
22. tic transfer switch ATS to service after inspection and maintenance Observe the Bypass Switch Position indica tor and lights Refer to Figures 3 7 3 8 3 9 and 3 10 1 Slide the transfer switch ATS into the enclosure isolation contacts facing inward until its crank pins engage the latch plates on both sides Next push in side rail carriage Then close enclosure door Close the enclosure door to prevent personal injury in case of electrical system fault Align position indicator Do not leave the handle in an intermediate position position window ISOLATION HANDLE CONN TEST ISOLATE TO CONNECT TRANSFER WITCH TURN CLOCKWISE TO ISOLATE TRANSEEB ARGA OH MEN OT BYES PeR i V clockwise draws in the Transfer Switch Figure 3 8 Isolation Handle 2 Turn the Isolation Handle clockwise approx 7 turns until the window shows TEST The ATS can be tested now without load interruption see page 2 1 Bypass Switch Turn crank clockwise until window shows TEST Figure 3 9 ISOLATE to TEST position Solenoid interlock prevents you from closing the isolation contacts until the ATS is in the same position as the Bypass Switch 3 Observe which Bypass Switch Position indicator is black NORMAL or EMERGENCY at the Bypass Switch Handle This indicates the source connected to the load 4 Observe which Transfer Switch Connected To light is on Normal or
23. ypass Switch EMERSON Network Power Transfer Transfer Switch Transfer Switch Control Connected Connected Retransfer Transfer To Delay es Normal Emergency To E Normal CHI FOS Bypass ooo onoe Emergency Source Source Accepted Accepted aie Figure 1 4 Standard controls and indicators 2 Electrical Operation This procedure checks electrical operation of the ATS Be sure to close the enclosure door before proceeding to prevent personal injury in case of electrical system fault Transfer Test The ATS should be bypassed and isolated Both normal and emergency sources must be available and the emergency source generator if used must be capable of being started put engine starting control in automatic position The Transfer Switch Connected to Normal light and the Normal Source Accepted light should be on 1 Turn the Isolation Handle clockwise approximately 7 turns until the window shows TEST position NOTE The engine generator may be signalled to start while turning the Isolation Handle If emergency source is available the ATS may operate to the emergency position If it does operate Retransfer Delay Bypass switch Perform steps 1 4 at right Observe the status lights E Black square means light is on O White square means light is off Turn the Isolation Handle clockwise approximately 16 turns to the CONN connected position Push in the Bypass Handle and turn it coun
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