GE Industrial Solutions Power Break II Motor Operator User Manual
Page 9
Power Break® II Motor Operator Mechanism
Installation in 2500–4000 A Draw-Out Breaker
9
1
1
1
1 4
4
4
4 .... Remove the screw holding the secondary terminal
block to the midcover, as illustrated in Figure 15.
Lift the terminal block off its mounting ridge.
1
1
1
1 5
5
5
5 .... Push the bottom rear of the side plate away from
the breaker, then hit the lip at the front of the side
plate (toward the front of the breaker) with a
rubber mallet until the bottom mounting tab is free
from its retainer. The top mounting tab should
then come off easily. Set the side plate aside.
1
1
1
1 6
6
6
6 .... Install the Remote Close accessory at this time, if
the breaker is to be equipped with this option.
1
1
1
1 7
7
7
7 .... R
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4
4
4....
1
1
1
1 8
8
8
8 .... Attach the mounting bracket, as shown in Figures 4
and 19, with four #10-32 screws tightened to 32 in-
lb torque. The bend of the bracket must be
outward from the spring frame.
1
1
1
1 9
9
9
9 .... Align the splined closing shaft of the breaker with
the splined cutout in the hub of the Motor
Operator Mechanism charge arm, as shown in
Figure 20.
2
2
2
2 0
0
0
0 .... Push the Motor Operator Mechanism into the
breaker until the spacers engage the spring frame
and the stop block.
2
2
2
2 1
1
1
1 .... Align the two holes in the mounting bracket with
the two holes in the Motor Operator Mechanism
and attach with two #10-32 screws tightened to 32
in-lb torque.
2
2
2
2 2
2
2
2 .... Thread a
1
⁄
4
–20 flat-head screw and conical lock
washer through the spacer and into the stop block,
as illustrated in Figure 4. Thread the other
1
⁄
4
–20
flat-head screw and conical lock washer through
the spacer into the captive nut in the spring frame.
Tighten both screws to 70 in-lb.
2
2
2
2 3
3
3
3 .... Plug the color-coded, numbered Motor Operator
Mechanism wires into the corresponding num-
bered sockets on the wires coming from the sec-
ondary terminal block, as illustrated in Figure 6.
2
2
2
2 4
4
4
4 .... Reinstall the secondary terminal block onto the
breaker midcover and fasten with the screw pre-
viously removed.
2
2
2
2 5
5
5
5 .... Replace the cable ties holding the secondary dis-
connect wires to the side plate, as shown in Figure
21.
Figure 18. Use a screwdriver blade to pry off the clip holding the
removable chain link in place.
Figure 19. Mounting bracket attached to the stop block on the spring
frame.
Figure 20. Motor Operator Mechanism aligned with the splined shaft in
the breaker.
Splined
Shaft
Mounting
Bracket
Splined
Shaft
Motor
Operator