GE Industrial Solutions Power Break I 800-2000 Frames 240-600 VAC - Manual (Page 22)

Power Break ® Circuit Breakers
Chapter 3. Accessories
16
Each coil of the blown-fuse trip device is wired across a
fuse so that the voltage across an open fuse is fed back to
the accessory coil. When the coil is energized, the solenoid
core releases the spring-biased latch, allowing the slide to
rotate the breaker latch, tripping the breaker. The fuse
must be replaced and the breaker reset before the breaker
can be reclosed.
If the breaker is closed on an open fuse, the blown-fuse
trip device will automatically open the breaker.
Blown-Fuse Trip Device Installation
Installation of the blown-fuse trip device is similar to that
of the shunt trip, described above.
1 1 1 1.... The blown-fuse trip device assembles to a mounting
plate. Not all breakers are shipped from the factory
with a mounting plate. Some breakers have only an
L-shaped bracket to retain the molded-plastic crank.
A mounting plate is provided in the blown-fuse kit.
• If the breaker is supplied with an L-shaped
bracket, remove the two retaining screws and dis-
card the bracket.
• If the breaker is supplied with a mounting plate,
follow the instructions under Mounting Plate
Removal.
2 2 2 2.... Assemble the blown-fuse trip device to the accessory
mounting plate as shown in Figure 26. If a shunt trip
had previously been mounted as shown in Figure 25,
it must be relocated as shown in Figure 26, with its
plunger stop nut in contact with the plunger of the
blown-fuse trip device.
3 3 3 3.... Follow the procedure for Mounting Plate Installation.
4 4 4 4.... Perform the following installation checks:
a a a a.... Replace the breaker cover as described above.
Close the breaker contacts.
b b b b.... Apply 120 volts to one coil of the blown-fuse trip
device for not more than one second. The
breaker must trip. Repeat the test for each coil.
5 5 5 5.... Attach the six lead wires from the blown-fuse trip
device across the three fuses, as shown in the wiring
diagram in Figure 35.
6 6 6 6.... Apply the descriptive label to the front of the breaker.
7 7 7 7.... Reassemble the breaker cover(s) as described in
Breaker Cover Reassembly.
Figure 35. Blown-fuse trip device wiring diagram.
3–6 Auxiliary Switch
The auxiliary switch, shown in Figure 36, is used for
remote indication of the breaker’s main contact posi-
tion—
open or closed . No distinction is made between
open or tripped mode. A maximum of 12 switches can be
installed per breaker. Each is single-pole, double-throw
(AB-type) and rated as listed in Table 7. Two switch posi-
tions must be devoted to each shunt trip accessory (if
used) per breaker. The auxiliary switch wiring diagram is
shown in Figure 37.
Figure 36. Auxiliary switch.