Examination For Damage - Eaton FP-25-LV-VSR Instruction Book

FP-25-LV-VSR
Breaker-To-Motor Starter Conversion
Figure 5.5. Filing Removed Section On Cell
Figure 5.6. Rejection Pin Clearance

5.2 Examination for Damage

Examine the LV-VSR for loose or obviously damaged parts. Never
attempt to install nor operate a damaged LV-VSR.
When the LV-VSR is first commissioned into service and each time
the LV-VSR is returned to service, it should be carefully examined
and checked to make sure it is clean and operating correctly.
5.2.1 Nameplate Verification
It is essential to compare the LV-VSR nameplate information with
the switchgear drawings for compatibility. The LV-VSR and rejection
system are designed to coordinate with existing short circuit and
continuous current ratings.
5.2.2 Current Limiting Fuses
The LV-VSR contains current limiting fuses. The primary purpose of
fuses is to protect the V201 vacuum contactor. The fuses can interrupt
faults up to 200 kA RMS symmetrical current.
The fuses are Ferraz Shawmut type J AJT600EIB current limiting.
DO NOT replace the fuses with any other type fuse. The fuses have
been tested in conjunction with the V201 vacuum contactor.
Blown Fuse Indication
The fuses have a micro-switch mounted to the body of the fuse.
This switch activates when a fuse has been blown. If the LV-VSR is
closed and a fuse blown, the switch will activate and open the V201
vacuum contactor. Any attempt to close the contactor with a blown
fuse will be prevented until the fuse is replaced (see Figure 5.7).
Replacing Fuses
To replace a blown fuse or fuses, follow the removal procedure in
this instruction booklet to remove the LV-VSR from the switchgear.
14 Instruction Book IB019008EN October 2016 www.eaton.com
Figure 5.7. Blown Fuse
Figure 5.8. Removing Top Barrier
Once the LV-VSR is removed from the switchgear and placed
outside of the arc-flash boundary, follow these steps.
1. Place the LV-VSR on a flat, level, and stable surface.
2. Remove four #10-32 x 1/2" fasteners from the top barrier.
Figure 5.8.
3. Remove top barrier and set aside.
4. Locate the blown fuse or fuses.
5. Remove the micro-switch from the blown fuse. To remove the
switch, use a flat blade screwdriver to gently pry the switch
from its mounting base.
6. Remove the two .50-13 fasteners from the blown fuse. Take
special notice of the orientation of the fuse.
7 . Remove the blown fuse from the LV-VSR.
8. Install the new replacement fuse with the same orientation in
place of the removed blown fuse.
9. Insert the .50-13 fasteners with a flat washer into the mounting
hole of the fuse; use a retaining nut with a lock washer and flat
washer to tighten the fuse with the connecting copper.
10. Tighten the fasteners using a wrench to hold the head of the
screw while tightening the retaining nut. DO NOT over tighten.
11. Torque the fasteners to 40 ft-lbs.
12. Replace the micro-switch to the fuse by gently pressing the
switch on to the mounting base.
13. Check the connections of the control wiring on the micro-
switch. Tighten connections with a Philips head screwdriver.
14. Install the top barrier back onto the LV-VSR.
15. Insert the #10-32 fasteners into the top barrier and tighten until
snug.
16. Electrically test the LV-VSR by using a test cabinet device or
equivalent. Make sure the LV-VSR will close and open normally.
17 . Perform an AC hipot test per section 6 prior to insertion into the
switchgear.
18. Check the V201 contactor per section 6.3.2 of this manual prior
to insertion.