Eaton 75VCPW-VSR Instruction Book

Contents

24Instruction Book IB02707112EAugust 201550/75VCPW-VSRBreaker To Vacuum Starter Replacement UnitEATON CORPORATION www.eaton.comFigurt 6.17. Sto Gap Btowttn RNlltr Btaring and Cam oN.5mm (.020”)4. Install four 8mm x 1.25 bolts 16mm long, with lock and flatwashers through the bottom of the contactor base plate into thelatch base plate, do not tighten at this time.5. With contactor energized, place a 0.5mm (0.020 in.) feeler gagebetween roller bearing and rotating cam on lath assembly, seeFigure 6.17 WARNINGFOLLOW NECESSARY PRECAUTIONS INCLUDING INSURING THAT ALLTRANSFORMERS ARE PROPERLY ISOLATED BEFORE APPLYING POWER TOCONTACTOR COIL. IF VOLTAGE IS BACK FED INTO A TRANSFORMER, HIGHVOLTAGE WILL BE GENERATED ON THE TRANSFORMER PRIMARY. HIGHVOLTAGE CAN CAUSE SERIOUS INJURY OR DEATH.6. Apply force to latch assembly, sliding cam towards roller bearing,and tighten four mounting bolts through contactor baseplate. Torqueto 200 in-lb (22.6 N-m).7. Release the latch by depressing the latch release tab on the latchassembly. Refer to Figure 6.17. WARNINGWHEN RELEASING THE LATCH SEVERAL PARTS OF THE CONTACTOR WILLMOVE WITH CONSIDERABLE FORCE. USE CAUTION TO INSURE FINGERSARE NOT PINCHED AS THE CONTACTOR IS FORCED OPEN BY THE RETURNSPRING.8. Route the two control wires from the full bridge diode across themain coils, connecting them to the main coil control wires with tiestraps, and terminate them at terminals 7 & 8 on the control board.