Power break, Circuit breakers chapter 2. breaker operation – GE Industrial Solutions Power Break I 800-2000 Frames 240-600 VAC User Manual
Page 15
Power Break
®
Circuit Breakers
Chapter 2. Breaker Operation
9
3
3
3
3.... Install the replacement trip unit as shown in Figure
15:
a
a
a
a.... Align the holes in the bottom of the trip unit with
the guide pins in the mounting plate. Lower the
trip unit until it is fully down on the mounting
plate and the connecting plug is secure.
b
b
b
b.... Push in the trip unit-cover interlock until it locks
in place, as shown in Figure 14.
N
N
N
NO
O
O
OT
T
T
TE
E
E
E:::: The trip unit has a stud on the bottom to defeat
the trip unit-cover interlock locking spring.
Figure 15. Aligning the trip unit to the mounting plate.
4
4
4
4.... Replace the top cover and secure with the four cover-
mounting screws.
5
5
5
5.... Operate the breaker manually through the
charge–close–open
cycle to ensure that the breaker is
properly functioning mechanically before energizing
or connecting it to the electrical system.
N
N
N
NO
O
O
OT
T
T
TE
E
E
E:::: A deenergized undervoltage release will not allow
the mechanism to charge and close.
6
6
6
6.... For trip units with ground fault, a neutral CT must be
provided if a four-wire system is to be used. See the
section on neutral CTs for instructions and precau-
tions.
Do not short the ground fault terminals pro-
vided on the breaker frame if a neutral CT is not
used.
MagneTrip™ Trip Units
Use the following procedure to change trip settings on
MagneTrip trip units:
1
1
1
1.... Remove the protective trip unit cover.
2
2
2
2.... Change the trip setting by rotating the plastic buttons
in the base with a screw driver, as shown in Figure 16.
3
3
3
3.... Replace the protective cover.
Figure 16. Adjusting the settings on a MagneTrip trip unit.
MicroVersaTrip Plus™ and MicroVersaTrip
PM™ Trip Units
See GEH-6273 for detailed instructions for setting up
MicroVersaTrip Plus and MicroVersaTrip PM trip units.