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50/75VCPW-VSR
Breaker To Vacuum Starter Replacement Unit
SECTION 7: REMOVAL OF PHASE BARRIERS
AND FUSE
To perform routine maintenance or to replace fuses, it will be
necessary to remove the phase barriers to gain access to the
components.
Before attempting any barrier or cover removal, open the VSR and
remove it from the switchgear cell. Refer to the sections on insertion
and removal for the proper procedures.
The VSR should be outside the flash boundary (per NFPA 70E) in a
safe and convenient area before performing any maintenance. Chock
the wheels of the VSR to prevent movement before beginning the
following fuse removal process procedure.
1. The clear barrier positioned between the front cover and the
phase barriers will need to be removed before any of the fuses
can be removed. There is no hardware holding this clear barrier
in place, and can be lifted straight up for access to the fuse
hardware. (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 retaining
slots. (Figure 7.2)
3. Remove the hardware securing the fuse from the rear of the VSR
unit and retain for attaching the replacement fuse. (Figure 7.3)
4. Remove the hardware securing the fuse in the front of the VSR
unit while supporting the weight of the fuse to avoid dropping the
fuse once it is free from its position. (Figure 7.4)
5. Once the hardware has been removed, the fuse can be lifted out
of the VSR unit. (Figure 7.5)
6. Place the new fuse into the position of the original fuse. Using
the hardware from the original fuse, secure the new fuse into
place. Torque hardware to 17ft-lbs.
7. Replace the barriers in reverse order that they were removed.
Figurt 7.1. RtmNving FrNno Cltar Barritr
Figurt 7.2. RtmNving Sidt Phast Barritr
Instruction Book IB02707112E
Figurt 7.3. RtmNving Hardwart FrNm Back BNooNm Nf Fust
Figurt 7.4. RtmNving Hardwart FrNm TNp FrNno Nf Fust
Figurt 7.5. RtmNving Fust (390A ShNwn)
EATON CORPORATION www.eaton.com
August 2015
25
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