Eaton 75VCPW-VSR Instruction Book

Contents

25Instruction Book IB02707112EAugust 201550/75VCPW-VSRBreaker To Vacuum Starter Replacement UnitEATON CORPORATION www.eaton.comSECTION 7: REMOVAL OF PHASE BARRIERSAND FUSETo perform routine maintenance or to replace fuses, it will benecessary to remove the phase barriers to gain access to thecomponents.Before attempting any barrier or cover removal, open the VSR andremove it from the switchgear cell. Refer to the sections on insertionand removal for the proper procedures.The VSR should be outside the flash boundary (per NFPA 70E) in asafe and convenient area before performing any maintenance. Chockthe wheels of the VSR to prevent movement before beginning thefollowing fuse removal process procedure.1. The clear barrier positioned between the front cover and thephase barriers will need to be removed before any of the fusescan be removed. There is no hardware holding this clear barrierin place, and can be lifted straight up for access to the fusehardware. (Figure 7.1)2. To remove the side phase barrier for access to the outer fuse,lift the phase barrier straight up and out of the notched retainingslots. (Figure 7.2)3. Remove the hardware securing the fuse from the rear of the VSRunit and retain for attaching the replacement fuse. (Figure 7.3)4. Remove the hardware securing the fuse in the front of the VSRunit while supporting the weight of the fuse to avoid dropping thefuse once it is free from its position. (Figure 7.4)5. Once the hardware has been removed, the fuse can be lifted outof the VSR unit. (Figure 7.5)6. Place the new fuse into the position of the original fuse. Usingthe hardware from the original fuse, secure the new fuse intoplace. Torque hardware to 17ft-lbs.7. Replace the barriers in reverse order that they were removed.Figurt 7.2. RtmNving Sidt Phast BarritrFigurt 7.3. RtmNving Hardwart FrNm Back BNooNm Nf FustFigurt 7.1. RtmNving FrNno Cltar BarritrFigurt 7.4. RtmNving Hardwart FrNm TNp FrNno Nf FustFigurt 7.5. RtmNving Fust (390A ShNwn)

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