Eaton ATC-900 Instruction Booklet

Also see for ATC-900: Operation and maintenance manual Manual Operation and maintenance manual Instruction booklet Operation and maintenance manual

Contents

For more information visit: www.eaton.com IB140036ENInstruction BookletPage 20 Effective: October 2014 O&M Manual for 40-1200A (480/600 Vac) ATC-900 3-Position,Open/Closed Transition Contactor Based Transfer SwitchSection 5: Operation5.1 GeneralAn ATS provides a power contactor to connect and disconnectthe load to and from the Source 1 and Source 2 power sources(Section 3.2.1).5.2 Manual Operation (Open Transition and CloseTransition Transfer Switch)WARNINGDO NOT ATTEMPT TO MANUALLY OPERATE THE ATS WITHSOURCE 1 OR SOURCE 2 AVAILABLE.WARNINGHIGH VOLTAGES ARE PRESENT IN AND AROUND TRANSFERSWITCH EQUIPMENT. BEFORE ATTEMPTING TO MANUALLYTRANSFER, DISCONNECT THE LINE POWER FROM THE EQUIP-MENT BEING SERVICED BY OPENING AND LOCKING OUT, IF POSSI-BLE, THE NEXT HIGHEST DISCONNECT DEVICE. FAILURE TOFOLLOW THIS PROCEDURE COULD CAUSE SEVERE PERSONALINJURY AND/OR DEATH.ALWAYS TURN THE SOURCE 1 POWER OFF AND TURN THESOURCE 2 (IF A GENERATOR) CONTROL SELECTOR SWITCH TOTHE “OFF” POSITION BEFORE ATTEMPTING A MANUAL TRANS-FER.To manually operate:1. Disconnect all sources of power.2. Disconnect the J7 connector from the ATC-900 controller.3. Depress the “trip” button located on the operating mecha-nism of the contactor to bring the contactor to neutral (trip)position.4. Locate the manual lever on the left side of the contactor.5. Locate the handle used to manually transfer the switch.6. Attach the handle to the manual lever (see Figure 19A &19B).7. Rotate the lever up to go to Source 1.8. Depress the “trip” button located on the operating mecha-nism of the contactor to bring the contactor to neutral (trip)position.9. Depress the “select” button located on the operating mecha-nism of the contactor and rotate the lever up keeping the“select” button depressed to go to Source 2MANUALSELECT BUTTONTRIP BUTTONOPERATINGHANDLEFigure 15A. ATS Manual Operating Handle in Use (OpenTransition).MANUALSELECT BUTTONTRIP BUTTONOPERATING HANDLEMANUALSELECT BUTTONTRIP BUTTONOPERATINGHANDLEFigure 15B. ATS Manual Operating Handle in Use (CloseTransition).