601 Old Airport Road • Bristol, VA 24201 Phone (276) 669-4084 • FAX (276) 669-1869 • www.federalpacific.com • ISO9001:2015
SECTION IB-2D-700
INSTALLATION & OPERATION INSTRUCTIONS
PMDF PAD-MOUNTED SWITCHGEAR
NOVEMBER 2017 VER. 2.1
PAGE 5
Figure 5. Bolting Units to Pad
Cabinet
5/8-11 Anchor
Bolts (by others)
4 Tie Down
Plates Provided With
Unit
Recommended
Pad Section
Figure 4. Typical Anchor Bolt Location
Corner Detail
Anchor Bolt
Enclosure Flange
Customers
Box Pad
Figure 6. View of PMDF elbow-compartment
side with doors open to show customer selected
bushing wells (pictured) or, if specified optional
600 ampere bushings. The 200 ampere bushing
wells accommodate loadbreak inserts and
elbow connectors. Dust covers (yellow discs)
must be removed from all unused positions and
replaced with protective insulating bushing-
well plugs (or insulating bushing covers when
furnished with 600 ampere bushings, which
have red dust covers).
Bushing Wells and Bushings
Federal Pacific PMDF Pad-Mounted Switchgear is furnished
with a choice of either 200 ampere bushing wells or 600 ampere
bushings on the line side or load side. The bushing wells and
bushings meet ANSI 386 standard requirements.
Bushing Wells
The 200 ampere bushing wells accommodate 200 ampere elbow
(separable insulated) loadbreak connectors and accessories. The
units are shipped with a yellow dust cover over each bushing well
to prevent contamination. Dust covers are NOT capable of provid-
ing any electrical insulation at medium voltage levels. Therefore,
if an elbow is not to be connected to a bushing well, prior to
energization the dust cover MUST be removed and replaced
with an insulating protective bushing-well plug. See Figure 6.
Install load-break inserts following the insert manufacturer’s
instructions supplied therewith. Terminate cables and install 200
ampere loadbreak elbows and accessories following instructions
provided by the cable manufacturer and the elbow manufacturer.
The 200 ampere elbows are a loadbreak device and, if standard
system operating practices and conditions permit, may be re-
moved when the equipment is energized, providing single-pole
loadbreak live switching is performed using insulated shotgun
clamp sticks. Before performing any live-switching with elbows,
install insulating feed-through standoff bushings on the parking
stand adjacent to the loadbreak elbow to be switched.
WARNING
For all un-terminated phase positions, failure to remove dust
covers and replace with a protective insulating bushing-well
plug prior to energization may result in equipment damage,
personal injury or death.
