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INSTALLATION
Step 8
Remove the shipping brace from the interrupter
base. See Figure 9. Discard the bolt.
Ç
CAUTION
DO NOT rest the interrupter on its base
after the shipping brace has been removed.
Damage to the operating shaft can
occur.
Step 9
With the interrupter still hoisted off the ground,
thread eight ⁵⁄₈–11
2 stainless-steel studs
into the eight tapped interrupter mounting
bosses on the base of the interrupter. Hand-
tighten each stud 8 to 9 turns, until it bottoms.
See Figure 9.
Ç
CAUTION
Never exceed the recommended torque
limit. The interrupter base contains SF
and is pressurized to 75 PSI. Damage to
the interrupter may occur if studs are
overtorqued.
Step 10
Loosely assemble the two interrupter support
brackets and the motor brackets to the
interrupter base as shown in Figure 10, using
the installed ⁵⁄₈–11
2 studs, flat washers
and uni-torque nuts furnished.
Install the cross support bracket (see Fig-
ure 10) between the two interrupter support
brackets with the four ⁵⁄₈–11
lock washers, and nuts furnished. The motor
bracket should be mounted between the cross
support bracket and the interrupter mounting
bosses, with the L-shaped portion of the bracket
facing away from the indicator window. See
Figure 11.
NOTICE
The interrupter mounting brackets for 69-,
115-, and 138-kV switches differ slightly in
shape and mounting confi guration. Take
care not to inter-mix parts from different
switch installations. Refer to the associated
reference drawing for details.
712-502
Interrupter mounting
bosses (bosses on
rear of interrupter base
not shown)
Figure 9. Remove shipping brace to reveal mounting bosses.
gas
6
Figure 10. Assemble mounting brackets to interrupter. (69-kV support
brackets shown.)
2¹⁄₄ cap screws,
Figure 11. Ensure that "L" shaped motor brackets are facing away from
the indicator window.
Interrupter
mounting
bosses
Interrupter
Cross-support
⁵⁄₈—11
2¹⁄₄
hardware
Interrupter
support
brackets
Interrupter
12
Bolt
Interrupter
mounting
bosses
Shipping brace
Cross-support
bracket
Cross-support
⁵⁄₈—11
2¹⁄₄
hardware
Motor
brackets
Interrupter support
bracket
Indicator
window
Motor brackets
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