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7000 Series ATB
Operator’s
Automatic Transfer &
Manual
Bypass–Isolation Switches
F–design, 3000 and 4000 amp. sizes
Refer to the outline and wiring drawings provided
with your 7000 Series ATB for all installation and
connection details and accessories.
TABLE OF CONTENTS
section-page
INSTALLATION ........................ 1-1
RefertoGroup5ControllerUser’sGuide381333–126
Mounting ............................. 1-1
forATSstatusdisplay messages,time delays,pickup
Power Connections ....................
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SECTION1 INSTALLATION The ASCO 7000 Series Automatic Transfer & Bypass– Mounting IsolationSwitch(ATB)consistsofanupperbypass–isola- Refer to the enclosure outline drawing furnished with tion switch, a transferswitch, a monitoring andtransfer thisswitchandmount the7000SeriesATB accordingto controller, and door–mounted controls. The ATB is thedetailsandinstructionsshownonthedrawing. factorywiredandtested. Installationrequiresremovalof Boltthecubiclesectionstogethersothattheyarelinedup the shipping
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INSTALLATION (continued) Connecting Power Conductors Bus Connections AWiringDiagramisfurnishedwiththeATB. Allwiring If bus connection is used, use SAE grade 5 hardware to must be made inaccordance withthe localcodes. After connect bus to appropriate terminal plates on bypass the power cableshave beentested, connect them tothe switching device. Wipe offbus surfacesbefore theyare appropriateterminallugsontheBypassSwitchasshown joined. If bus is dirty, gently clean surfaces with a on the wiring dia
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INSTALLATION (continued) Install theTransfer Switch Remove interference tag after makinginspection After the enclosure is installed and power cables or bus on page 1-4. connected to the Bypass Switch, the Transfer Switch SL1 carriagecanberolledin. Thefloorofthecabinetmustbe solenoid freeofdebrisandclean.Ifnecessary,useavacuumcleaner. lock Make a thorough inspection to be sure no tools are left inside. The Bypass Handle must be in the BYPASS POS handle position (closed on normal). The Isolation H
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INSTALLATION (continued) Inspection1 sensingleadcontact ! Do notforce the Isolation Handle. Be sure that TS IS thesensing lead isolationcontactsdo nothitthe stab isolation contacts malestabshead on,butratherslideonthem. Figure 1–5. Isolation contacts in TEST position. MoveATSfromDISCONNECTEDToTEST Position (withoutelectricalpower) Action Turn the Isolation Handle (Figure 1–3) clockwiseapproximately7or8turns. The Transfer Switch should be pulled inward; the sensing lead isolation Observe contacts
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INSTALLATION (continued) AutomaticTransfer &Bypass–IsolationSwitch Transfer Transfer Switch Control Transfer Switch Connected Connected Transfer Retransfer Test To To Delay HOLD FOR Normal Emergency Bypass ( 15 SECONDS) GREEN RED observe Normal Emergency Source Source these lights Accepted Accepted GREEN RED Figure 1-8. Standard controls and indicators. Close the normalsource circuit breaker. The Transfer Switch FunctionalTest 1 Connected To Normal and the Read all instructions on the Wiring Dia
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INSTALLATION (continued) 2–ManualOperationTest This procedure will check the manual operation of the Bypass Switch, Isolation Switch, and Transfer Switch. Observe the lights on the Status Indicator panel. The Bypass Switch CLOSED ON NORMAL and the TEST lightsshouldbe on. See Figure 1–11. 1. IsolatetheAutomaticTransferSwitch: InstalltheIsolationHandleandturnitcounterclock- wiseuntilitstops (approximately 7 or8 turns). The Automatic Transfer Switch is now in the Discon- nectedposition(See Figure 1
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INSTALLATION (continued) AutomaticTransfer &Bypass–IsolationSwitch Transfer Transfer Switch Control Transfer Switch Connected Connected Transfer Retransfer Test To To Delay HOLD FOR Normal Emergency Bypass ( 15 SECONDS) GREEN RED operate this switch observe Normal Emergency Source Source these lights Accepted Accepted GREEN RED Figure 1-13. Standard controls and indicators. 3–ElectricalOperation The Transfer Switch Connected 1 to Normal and Normal Source This procedure checks electricaloperation
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SECTION2 TESTING&SERVICE TRANSFER TEST REPLACEMENTPARTS Test the Automatic Transfer Switch portion of the 7000 Replacement parts are available in kit form. When or- SeriesATBatleastonceamonth. Thisprocedurechecks deringpartsprovide the SerialNo., Billof MaterialNo. the electrical operation of the Transfer Switch and (BOM),andCatalogNo.fromthetransferswitchname- Controller. Puttheengine–generatorstartingcontrol(at plate. ContactyourlocalASCOPowerTechnolgiessales the engine–generatorset)inautomati
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TESTING&SERVICE (continued) TROUBLE-SHOOTING Note any optional accessoriesthat may be furnishedon Hazardousvoltagecapableof causing shock, theATB andreview theiroperation. Referto anysepa- burns, ordeathis used inthis switch. rate drawings and/or instructions that may be packed Do nottouchthepowerorload terminals withtheATB. of the transfer switch! Table2-1. Trouble-Shooting Checks. CHECK IN NUMERICAL SEQUENCE PROBLEM 1 2 3 OPERATION GEN-SET VOLTAGE Engine–generatorsetdoes Hold Transfer Test swi
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SECTION3 BYPASSING&ISOLATING BYPASSING ISOLATING This procedure explains how to isolate the Automatic This procedure explains how to Bypass the closed Transfer Switch. Isolatingis requiredbefore anyservice Automatic Transfer Switch contacts. Bypassing is re- work can be performed on the ATS. Observe the ATS quired before the ATS can be tested or isolated. The POSITIONlightsontheSTATUSINDICATORpanel. Bypass Switch must be in the AUTOMATIC POS (posi- tion)andtheIsolationHandlemust bein theconnecte
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BYPASSING&ISOLATING (continued) TRANSFERSWITCHREMOVAL TRANSFERSWITCHREINSTALLATION This procedure explains how to remove the Transfer ThisprocedureexplainshowtoinstalltheTransferSwitch Switchforinspectionandmaintenance. afterinspectionandmaintenance. 1. BypassandIsolatetheAutomaticTransferSwitchby carefully following directions on page 3–1. Be sure that the ATS POSITION DISCONNECTED light is Hazardousvoltagecapableof causing electrical shock, burns, ordeath. on. Thenremove the IsolationHandle. D
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BYPASSING&ISOLATING (continued) RETURNTOSERVICE This procedure explains how to return the Automatic Transfer Switch to service after inspection and maintenance. ObservetheATS POSITIONlightsonthe STATUSINDICATORpanel. 1. Install the Transfer Switch into the enclosure. Carefully followdirectionsonpage 3–2. ! Close enclosure doorto preventpersonal injury in case of electrical system fault. 2.. Install the Isolation Handle (through the door) and turnitclockwise(approximately7or8turns)untilthe TESTli
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INDEX A I R inspection, 1–4, 3–1 ratinglabel, cover auxiliarycircuits, 1–2 installation, 1–1, 1–3 replacementparts, 2–1 isolatingtheATS, 3–1 returntoservice, 3–3 B busconnections, 1–2 L S lights, 1–5, 1–6 bypassingthe ATS, 3–1 service loadconnectedtoemergency, 1–5 ASCOServices,Inc.(ASI),2–1 loadconnectedtonormal, 1–5 settings C seeControllerUser’s Guide lubrication, 2–1 catalognumber, cover cleaning, 2–1 M T maintenance, preventive, 2–1 connections test, functional, 1–5, 1–6, 1–7 power, 1–2 main
