Power Break
®
Circuit Breakers
Chapter 3. Accessories
13
Shunt Trip Installation
N
N
N
NO
O
O
OT
T
T
TE
E
E
E:::: If the shunt trip is being replaced because of a
defective coil, the cause of the initial failure should first
be determined. If necessary, consult the factory for fur-
ther guidance.
1
1
1
1.... Assemble the coil to the mounting plate as shown in
Figure 25. If a blown-fuse trip device is also to be
installed on the mounting plate, mount the shunt
trip coil as shown in Figure 26.
2
2
2
2.... When a blown-fuse trip device is included, place the
shunt trip plunger stop nut in contact with the
plunger of the blown-fuse trip device.
3
3
3
3.... Depress the actuator on the cut-off switch. Align the
tapped holes in the switch bracket with the holes in
the arm stop (left pole) and secure with #8-32
×
9
/
16
screws and lock washers, as shown in Figure 27.
Tighten to 23 in-lbs torque.
4
4
4
4.... Remove the knockouts in the side of the base, as
required. Each knockout will accommodate up to
three bundles of wire. Remove all sharp edges with a
file.
5
5
5
5.... Clean all debris from the inside of the breaker.
N
N
N
NO
O
O
OT
T
T
TE
E
E
E:::: Shunt trip coils rated at 12 Vdc or 24 Vdc must be
mounted in the position nearest the latch. These coils
may not develop enough force to drive both the latch
and the blown-fuse trip device.
Figure 25. Shunt trip coil position with no blown-fuse trip device.
Mounting Plate Installation
1
1
1
1.... Replace the molded drive crank onto the mechanism
drive pin, as shown in Figure 24, engaging the roll
pins into the slot in the drive crank.
Figure 26. Shunt trip coil position with blown-fuse trip device.
Figure 27. Attaching the switch bracket to the arm stop.
2
2
2
2.... Place the mounting plate in position so that its two
operating studs engage the molded drive crank, as
shown in Figure 24. Ensure that the isolating barrier
is in place.
3
3
3
3.... Attach the three retaining screws. Tighten the two
small screws to 20 in-lbs and the large screw with tub-
ing to 75 in-lbs.
4
4
4
4.... Attach wire ties to the leads and secure them to the
mounting plate, as shown in Figure 20.
5
5
5
5.... Insert the leads into the knockout in the base side
wall, ensuring that one tie is on the inside of the base
and the other is on the outside.
6
6
6
6.... Apply the descriptive label to the front of the breaker
cover.
Summary of Contents for Power Break
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Page 2: ......
Page 27: ......
