GE Industrial Solutions EntelliGuard 3200–5000 A Frames, 240–600 Vac - Manual (Page 19)

EntelliGuard™ 3200–5000 Ampere Power Circuit Breakers
Chapter 4. Accessory Operation
11
.This chapter contains the operation procedures for each
of the available breaker accessories.
4.1 Shunt Trip
The Shunt Trip allows the breaker to be opened remotely
by the EntelliGuard Messenger™. It is always provided on
electrically operated breakers. The catalog number and
current ratings for the Shunt Trip are given in Table 4.
For installation instructions see DEH169.
Catalog
Number
Voltage
Rating
WPS1LF60120 120 Vac, 60 Hz
Table 4. Catalog number and electrical rating for the Shunt Trip
accessory.
Operation
The Shunt Trip causes the circuit breaker to trip when its
coil is energized. An “A” auxiliary switch, which is closed
when the breaker is closed, is in series with the Shunt Trip
coil, as illustrated in Figure 5. The voltage source is
connected to positions 5 and 7 on the secondary
disconnect.
Figure 5. Shunt Trip connections to the auxiliary switch and secondary
disconnect.
4.2 Charging Motor
The Charging Motor provides a means of electrically
charging the springs that close the breaker. The Charging
Motor is available only as a factory-installed option. It is
always provided on electrically operated breakers.
Operation
The circuit breaker closing springs are charged automati-
cally when control voltage is applied to terminals 8 and 17
of the secondary disconnect. When the springs are fully
charged, a cutoff switch automatically de-energizes the
motor. The closing springs will recharge automatically
after the breaker closes.
4.3 Remote Close
The Remote Close allows the breaker to be closed
remotely by the EntelliGuard Messenger™ after the
closing springs have been charged. It is always provided
on electrically operated breakers. The catalog number
and operating voltage are listed in Table 5. For
installation instructions see DEH173.
Catalog Number Voltage Rating
WPRCLF60120 120 Vac, 60 Hz
Table 5. Catalog number and electrical rating for the Remote Close
accessory.
Operation
A circuit breaker equipped with the Remote Close acces-
sory can be closed by applying the rated control voltage to
terminals 9 and 18 of the secondary disconnect.
The Remote Close accessory is continuously rated and has
an antipump feature that prevents a motor-operated
breaker from repeatedly closing if the closing signal is
maintained. The closing control voltage must be removed
for 1–2.5 seconds and then reapplied for each breaker
closure.
4.4 Open-Fuse Lockout
The Open-Fuse Lockout is used in combination with a
Fuse Rollout Element. When any fuse blows, the Open-
Fuse Lockout trips the breaker to prevent single-phasing.
This accessory is available only as a factory-installed
option.
Operation
The Open-Fuse Lockout contains an individual trip sole-
noid for each pole, connected directly across the fuse in
that phase as illustrated in Figure 6. When any fuse blows,
its solenoid is energized and trips the breaker. An
indicator shows which fuse has blown. The breaker cannot
be reclosed until the blown fuse is replaced and the
RESET button is pressed on the Open-Fuse Lockout. The
Open-Fuse Lockout connects to the fuses in a Fuse Rollout
Element through the secondary disconnect.
Figure 6. Open-Fuse Lockout (OFLO) connections to the secondary
disconnect.
5
7
Aux Switch
3C
3
2
1
Shunt Trip
22
2
1
OFLO
Phase A
23
24
4
3
OFLO
Phase B
25
26
6
5
OFLO
Phase C
27