Powered by Safety
®
55
IB-65100
Recommended Renewal Parts and Replacement Procedures
ab. Align the hex head cap screws
(32) to the threads of the
vacuum interrupter (3).
ac. Insert an 1½” temporary bolt
through the upper primary
assembly (18) and into the
vacuum interrupter (3).
ad. Tighten the temporary bolt
enough to pull the vacuum
interrupter (3) back up, which
will start opening the contacts
inside.
ae. Replace the temporary bolt with
the original hardware when the
vacuum interrupter (3) is pulled
far enough to align the bolt
holes.
af. Remove the temporary bolt.
ag. Torque the original bolts to
50 ft.-lbs.
vi. Grasp the bell portion of the high
voltage pushrod (4) and tighten it by
hand onto the vacuum interrupter
(3). Hold the high voltage regulator
disc (13) with channel lock pliers and
tighten the hex head nuts (46).
vii. Add one small drop of Lock-Tite
243 (Catalog # 243) to the threads
of the button head cap screws (36)
that were removed and install the
screws.
viii. Install the bottom bus support
(7) onto the high voltage housing
(11) and align the bus support and
housing to the pencil marks. If
shims are used, replace the shims in
the original positions. Apply
Lock-Tite 243 to the button head
cap screws (20) and install them.
ix. Apply Lock-Tite 243 to the hex head
screws (39 & 23) and install and
torque the screws to 30 ft.-lbs.
x. Torque the hex nuts (39) and the hex
head cap screw (24) to 30 ft.-lbs.
xi. Install the primary conductor (1)
onto the lower bus connector (2).
xii. Screw the primary conductor (1)
onto the bus connector (2). Torque
the screw to 70 ft.-lbs. with the
primary disconnect removal tool
(Catalog # 43397H01) and hex head.
xiii. Tighten the socket set screws (41).
Note:
Make certain the hardware is torqued
correctly and the parts are installed
in the same positions as they were
before being removed.
c. Verification
i. Charge and close the circuit breaker.
There should be a gap between the
flat washer (45) and the high voltage
pivot (50) of Figure 25 Vacuum
Interrupter Assembly Drawing,
Detail A.
ii. The gap between the flat washer
(45) and the high voltage pivot (50)
should be set between 0.150” and
0.188” on a vacuum interrupter with
no operations. As the devices are
operated, the gap may decrease
over time due to erosion of the
primary contacts (1).
iii. If the gap needs to be increased,
hold the high voltage regulator
disc (13) with channel lock pliers,
loosen the hex head nut (46) and
turn the high voltage regulator disc
(13) counterclockwise. Retighten
the hex head nut (46) and measure
the gap again. Do not allow the
pushrod (4) to turn.
