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Figure 17.
Figure 19.
Non-Load-break Fuse Operation
When non-load-break style fuse mountings are furnished, such
as the S&C type SM-5 or the clip style mountings to accom-
modate Cooper Type NX and Type Q, the fuse replacement
procedure would be similar to those for the Auto-jet
However, the following precautions should be observed when
work is performed on non-load-break fuses:
1. Any upstream device which could energize the fuse must
be opened and rendered inoperative to remove possibility
of inadvertently energizing the fuse.
2. Upon opening the fuse compartment door, the equipment
should be tested for the presence of voltage using a suit-
able voltage sensing device and hotstick arrangement.
3. If no voltage is present, the appropriate fuse terminal
should be grounded using proper device and technique.
4. Fuse(s) may then be removed and replaced using appropri-
ate fuse replacement procedures.
601 Old Airport Road • Bristol, VA 24201 Phone (276) 669-4084 • FAX (276) 669-1869 • www.federalpacific.com • ISO9001:2015
Figure 18.
Figure 20.
fuse.
®
Optional Features
Standard options can be supplied that best serve the customer's
needs and operating practices. These are listed below:
Adapter Base
(Applicable to all models except 35kV))
3" non-compartmented to match S&C PMH dimension at pad.
Base Spacer
Non-compartmented or compartmented.
Barriers — Inner Door
Lift-off insulating barrier secured with penta-head bolt.
Fuse Storage Hooks
Finish Color and Special Cabinet Material
Ground Studs
Key Interlocks
Penta-Head Security Bolts
Distribution Surge Arresters
Cable Terminators
Cable Supports
Terminal Adapters
Fault Indicators
Copper Bus
Strip Heaters
Hinged Roof
Figure 21 shows a PSI-9 unit equipped with fault indicator with
viewing windows on associated doors, 24" base spacer to pro-
vide for increased cable terminating height, and shipping pallet.
Figure 21.
SECTION IB-1G-500
INSTALLATION & OPERATION INSTRUCTIONS
PAD-MOUNTED SWITCHGEAR TYPE PSI
REV. 1.6 - NOVEMBER 2017
PAGE 9
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