Eaton ATC-900 Operation And Maintenance Manual

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Contents

For more information visit: www.eaton.com IB140064ENInstructional BookletPage 14 Effective: April 2018 Operation and Maintenance Manual, Automatic Transfer Switch, Bypass Isolation,Contactor Type, Open/Closed Transition, ATC-900 Controller, 3000A FrameSection 4: Installation and Wiring4.1 GeneralEaton transfer switches are factory wired and automatically testedwith a test report included. Installation requires solidly mountingthe enclosed unit and connecting the power cables and auxiliarypilot circuits. Physical mounting procedures and power cable con-nections are covered in this section. All other required wiring orelectrical connection references are covered in a separate Cus-tomer Wiring Diagram packaged with the transfer switch.Locate the wiring booklet, review it, and keep it readily availablefor reference purposes during installation and testing. Once atransfer switch is properly installed and wired, it should bemechanically and electrically checked for proper installation andoperation. The procedures for these initial mechanical and electri-cal checks are outlined in Section 7 of this instruction manual.4.2 Mounting LocationChoose a location that offers a flat, rigid mounting surface capa-ble of supporting the weight of the enclosed transfer switchequipment. Avoid locations that are moist, hot, or dusty. How-ever, Eaton offers enclosure designs that can be used in specialenvironments. If there are any doubts as to the suitability of thelocation, discuss it with your Eaton representative.Check to make certain that there are no pipes, wires, or other haz-ards in the immediate area that could create a problem. The pan-els provide ample room for rear cable entry from top, bottom, andsides. At no time should cable be routed to retard the action ofrelays or cover the logic in a way that restricts adjustments.Maintain proper electrical clearances between live metal parts andgrounded metal.4.3 Unpackaging and InspectionProceed with the following four steps.Step 1: Carefully uncrate the transfer switch. If damage is visible,please contact your local Eaton sales representative or thefactory.Step 2: Visually verify that there are no broken or damaged com-ponents or evidence of distorted metal or loose wires as aresult of rough handling.Step 3: A label on the door provides specifications for your trans-fer switch. Verify that these specifications comply withyour requirements.Step 4: Remove any braces or packing used to protect the trans-fer switch or internal components during shipping. Theswitch has 12 bolts holding the unit down into the palleteach with a seismic washer. Do not throw away the seis-mic washers as they will be used when mounting theswitch on the pad.4.4 Mounting ProcedureWith the enclosed transfer switch equipment unpacked and readyfor mounting, proceed with the following steps.Step 1: Mounting and cabling access is best provided by remov-ing side and rear covers (when applicable). If required toremove the enclosure covers a 3/8 socket will berequired. The back and two sides are similar in that if thelower panels need to be removed, the top panel must beremoved first.Step 2: Gently maneuver the switch into its location using all ofthe supplied lift brackets.Step 3: Bolt the enclosure to the base (see Figures 16 & 17). Seis-mic mechanical mounting requirements use 12 5/8-11UNC grade 5 or better hex head bolts with the includedwashers (Eaton pn. 66A8231H14). Also see the outlinedrawing for locations.Step 4: Tighten bolts to 120 ft-lbs (163 Nm).Figure 16. Mounting With Seismic Washer.CAUTIONSINCE THE ENCLOSED TRANSFER SWITCH MUST BE LIFTED INTOPLACE FOR MOUNTING, BE CERTAIN THAT ADEQUATE RESOURCESARE AVAILABLE FOR LISTING TO AVOID PERSONNEL INJURIES OREQUIPMENT DAMAGE.CAUTIONEXTREME CARE SHOULD BE TAKEN TO PROTECT THE TRANSFERSWITCH FROM DRILL CHIPS, FILLINGS, AND OTHER CONTAMI-NANTS WHEN MAKING THE CABLE ENTRY HOLES AND MOUNTINGTHE ENCLOSURE TO PREVENT COMPONENT DAMAGE OR AFUTURE MALFUNCTION.NOTICECABLE ENTRY HOLES ARE NOT PART OF THE ENCLOSURE WHENSHIPPED FROM THE FACTORY AND MUST BE PROVIDED IN THEFIELD, EITHER BEFORE OR AFTER MOUNTING THE ENCLOSURE.