S&C Instruction Sheet 716-504 17
Installation
(d) Remove the ½–inch silicon-bronze pin
and cotter pin from the insulated
operating rod. Retain these pins for re-
use in Step16(g).
(e) Remove the protective cover on the high-
speed base at the pole-unit mounting
position. See Figure 5 on page 12.
Continue to raise the pole-unit to its
mounting position at the center of the
high-speed base, as shown on the catalog
drawing. Carefully guide the pole-unit to
avoid damaging the insulated operating
rod.
(f) Attach the pole-unit base to the high-
speed base using the ½–12×1¾-inch
hex-head galvanized steel cap screws,
at washers, and self-locking hex nuts
furnished. Lubricate the cap screws to
facilitate tightening.
(g) Attach the pole-unit channel base to
the support brace, using the ½–13×1½-
inch hex-head galvanized steel cap
screws, at washers, and self-locking
hex nuts furnished. Securely tighten all
cap screws.
CAUTION
The operator directly drives the interrupters
open and closed through a simple high-
speed power train leading from the top of
the operator, through a horizontal interphase
linkage enclosed in a steel-sheathed high-
speed base, to reciprocating-action insulated
operating rods that pass through the center of
the insulating support columns. Permanently
lubricated bearings are used throughout the
power train. The high-speed base has been
fully pre-assembled and adjusted at the
factory. DO NOT disassemble the high-
speed base or high-speed power train.
Damage to the high-speed base and personal
injury may result.
(h) Shims are furnished and should be
installed as necessary between the pole-
unit channel base and the disconnect-
end support arm channel assembly to
compensate for any irregularities bet-
ween the mating surfaces.
Repeat 12a through 12h for the two
outboard pole-units—marked “Pole 1”
and “Pole3.”
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