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508 - Asco 7000 Series_operator's Manual-381333_283b

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  381333–283 B 50 Hanover Road, Florham Park, New Jersey 07932–1591 USAFor 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 5T3telephone 519 758–8450, fax 519 758–0876, for service call 1 888 234–2726 (ASCO) www.asco.ca Operator’sManual 7000 Series ATS Automatic Transfer SwitchesJ–design, 260, 400, & 600 A DANGER is used in this manual to warn of highvoltages capable of causing shock, burns, or death.WARNING is used in this manual towarn of possible personal injury.CAUTION is used in this manual towarn of possible equipment damage. 260 amp. size Refer to the outline and wiring drawings provided with your 7000 Series ATS for all installation andconnection details and accessories.Refer to  Group 5 Controller User’s Guide 381333–126 for ATS status display messages, timedelays, pickup & dropout settings, and adjustments. Rating Label Each automatic transfer switch (ATS) has a rating label todefine the loads and fault circuit withstand/closing ratings.Refer to the label on the transfer switch for specific values. Do not exceed the values on the rating label.Exceeding the rating can cause personal injuryor serious equipment damage. Nameplate The Transfer Switch nameplate includes data for eachspecific ASCO 7000 Series ATS. Use the ATS only withinthe limits shown on this nameplate. An experienced licensed electrician must install the ATS. TABLE OF CONTENTS section-pageINSTALLATION 1-1. . . . . . . . . . . . . . . . . . . . . . . .Mounting and Line Connections 1-1. . . . . . . . . Auxiliary Circuits and Harness 1-2. . . . . . . . . . .Engine Starting Contacts 1-2. . . . . . . . . . . . . . .Functional Test 1-2 through 1-5. . . . . . . . . . . . . .TESTING & SERVICE 2-1. . . . . . . . . . . . . . . . . .Transfer Test 2-1. . . . . . . . . . . . . . . . . . . . . . . . . .Preventive Maintenance 2-1. . . . . . . . . . . . . . . .Disconnecting the Controller 2-1. . . . . . . . . . . .Manual Load Transfer 2-2. . . . . . . . . . . . . . . . . .Trouble-Shooting 2-2. . . . . . . . . . . . . . . . . . . . . .INDEX back cover. . . . . . . . . . . . . . . . . . . . . . . . .  Catalog Number Identification  A typical Catalog Number is shown below with its elements explained. The example is for a 7000 Series 7ATS with overlapping neutral, 3 pole, 600 amp, 480 V, in a Type 1 enclosure: 7ATS C 3 600 N 5 C Phase PolesNeutral  A  – solid  Amperes Voltage Controller Enclosure B  – switched  5X  – if accessoriesordered 5  – standard G  – type 4 C  – type 1 F  – type 3R H  – type 4X 3  – three Ø 2  – single Ø B  120 D  220  A  115 C  208 E  230 K   415 M  460 J  400 L  440 N  480 G  277 F  240 H  380 Q  575 P  550 R  600 600 blank – noneblank – open type J designprefixletter 260400L  – type 12 C  – overlapping TransferSwitchControllernormal powerconnectionsemergencypowerconnectionstransfercontrol& lights 260 amp. size in typical enclosure with location of customer connections customer terminals blockload powerconnections  SECTION 1 INSTALLATION 1---1  ASCO 7000 Series Automatic Transfer Switches (ATSs)are factory wired and tested. Field installation requiresrequires mounting and connection of service cables,and auxiliary control circuits (if required). Remove the Shipping Skid (large ATSs) For large ATSs, open the front door and remove thefour lag screws (2 in front, 2 in rear) securing enclosureto the wood skid. Supporting Foundation The supporting foundation for the enclosure must belevel and straight. Refer to the applicable enclosureoutline drawing included with the switch for allmounting details including door opening space.If bottom cable entry is used, the foundation must beprepared so that the conduit stubs are locatedcorrectly. Refer to the enclosure outline drawing forspecified area and location. Provide cable bendingspace and clearance to live metal parts. When aconcrete floor is poured, use interlocking conduitspacer caps or a wood or metal template to maintainproper conduit alignment. Mounting Refer to the applicable enclosure outline drawingfurnished with this switch and mount the automatictransfer switch according to details and instructionsshown on diagram. Line Connections Refer to the Wiring Diagram provided with the switch. All wiring must be made in accordance with theNational Electrical Code and local codes.It is not necessary to remove pole covers from thetransfer switch for cabling. If you do remove them,reinstall them carefully. De–energize the conductors before makingany line or auxiliary circuitry connections.Be sure that Normal and Emergency lineconnections are in proper phase rotation.Place engine generator starting control in theOFF position. Make sure engine generator isnot in operation. Testing Power Conductors Do not connect the power conductors to the transferswitch until they are tested. Installing power cables inconduit, cable troughs and ceiling-suspended hangersoften requires considerable force. The pulling of cablescan damage insulation and stretch or break theconductor’s strands. For this reason, after the cablesare pulled into position, and before they areconnected, they should be tested to verify that they arenot defective or have been damaged duringinstallation. Protect the automatic transfer switch fromconstruction grit and metal chips to preventmalfunction or shortened life of the ATS. Connecting Power Conductors  After the power cables have been tested, connect themto the appropriate terminal lugs on the transfer switchas shown on the wiring diagram provided with theswitch. Make sure the lugs provided are suitable foruse with the cables being installed. Standard terminallugs are solderless screw type and will accept the wiresizes listed on the drawings provided with the switch.Be careful when stripping insulation from the cables;avoid nicking or ringing the conductor. Removesurface oxides from cables by cleaning with a wirebrush. When aluminum cable is used, apply jointcompound to conductors. Tighten cable lugs to thetorque specified on rating label. Controller Ground  A grounding wire must be connected to the controller’slower left mounting stud. Because the controller ismounted on the enclosure door, a conductive strapmust be used between the enclosure and the door. Thisconnection provides proper grounding which does notrely upon the door hinges. Harnesses The transfer switch is connected to the left side of thecontroller by a plug–in harness (two plugs).  INSTALLATION  (continued) 1---2 Engine Starting Contacts  All customer connections, including the engine controlcontact connections, are located on terminal block TB which is mounted on the top right side of theenclosure. Refer to the wiring diagram provided withthe automatic transfer switch and connect the enginestart wires to the appropriate terminals. See Figure1–1 and Table A. Table A. Engine start connections. When normal sourcefailsTerminals onTerminal Block TB contact closes TB1 and TB2contact opens TB1 and TB3 Note:  To temporarily disable engine control fromthe automatic transfer switch you can unplug J3from the small P3 receptacle at the bottom of theassembly. Be sure to reconnect plug J3 to the P3receptacle for automatic transfer switch operation. Auxiliary Circuits Connect auxiliary circuit wires to appropriate terminalson transfer switch terminal block TB as shown on the wiring diagram provided with this automatic transferswitch. engine startconnectionsoncustomerterminalblock TBFigure 1-1. Customer terminal block on the top rightside of the enclosure. Functional Test The Functional Test consists of three checks:   1 — Manual Operation Test, page 1–3   2 — Voltage Checks, page 1–4   3 — Electrical Operation, page 1–5 Do these checks in the order presented toavoid damaging the automatic transfer switch. Read all instructions on the Wiring Diagram and labelsaffixed to the automatic transfer switch. Note thecontrol features that are provided and review theiroperation before proceeding.Continue to  1 – Manual Operation Test  on next page.
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