GE Industrial Solutions EntelliGuard 800–2000 A Frames, 240–600 Vac Maintenance Manual - Manual (Page 24)

EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 5. Breaker Maintenance
14
5. Remove the four bolts, washers, and nuts that attach
the secondary disconnect mounting plate to the
back frame. Remove the mounting plate.
6. Remove one of the snap rings and slide out the pin
connecting each of the movable contact assemblies
to the breaker main shaft, as illustrated in Figure 7.
7. Carefully place the breaker on its back, resting on
the primary disconnects.
8. Remove the six bolts and lock washers attaching the
front and back frames on the side panels.
9. Lift the front frame straight off the back frame.
Reconnection of Front and Back Frames for
EGS08, EGF08, and EGH08
The following procedure is illustrated in Figure 8.
1. Carefully place the back frame on a suitable work
surface, resting on the primary disconnects.
2. Place the front frame assembly onto the back frame,
being careful to line up the mounting holes in the
side panels. Insert the six bolts and lock washers and
tighten them to 200 in-lb.
3. Carefully place the breaker upright, resting on its
bottom surface.
4. Reconnect the movable contact assemblies to the
breaker main shaft by inserting the connecting pin
and reattaching the snap ring, as illustrated in
Figure 7.
5. Place the secondary disconnect mounting plate in
position and secure with the four bolts, washers, and
nuts.
6. Connect the ends of the tie bars to the secondary
disconnect mounting plate and attach the other
ends to the front frame with the bolt, lock washer,
and nut removed earlier. Tighten to 96 in-lb.
7. Place the flexible washer on the molded pin on the
bottom of the secondary disconnect, then slide the
two feet into the slots on the mounting plate. Secure
with the two screws and standoffs, as illustrated in
Figure 6. Replace the wire bundle into the channel
on the top of the frame and secure with wire ties.
8. Insert the four interphase barriers into their mount-
ing slots.
9. Slide the arc chutes into position, with the slots over
the movable contact arms. Secure with the bolts and
lock washers removed on disassembly.
10. Check that no wires are interfering with breaker
operation and that all bolts and nuts are tight.
Operate the breaker a few times to verify proper
operation.
Figure 6. Removing or installing the secondary disconnect.
Figure 7. Movable contact connection to the breaker main shaft on
EGS08, EGF08, and EGH08 breakers.