1 trip unit removal and replacement – GE Industrial Solutions MicroVersaTrip PM User Manual
Page 43
MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
Chapter 5. Maintenance and Trouble-Shooting
33
Rating plugs and MicroVersaTrip Plus and Micro-
VersaTrip PM Trip Units are factory tested and nor-
mally shipped installed in their breaker frame
assemblies or as part of a conversion kit. There is no
requirement for periodic maintenance of the Trip
Units.
There are no user-serviceable components
within the Trip Units.
5-1 Trip Unit Removal and
Replacement
Rejection pins are installed on the rear of all Trip
Units to prevent installation of an incorrect Trip
Unit into a breaker. Do not use excessive force when
installing a Trip Unit. Replacement of a Trip Unit
always requires repeating the setup procedures, as
described in Chapter 2.
Power Break® Insulated-Case Circuit
Breakers
Power Break circuit breakers are shipped from the
factory with their Trip Units installed. Removal is
only necessary for replacement. Refer to GEH-6303
for detailed instructions on replacing Trip Units in
Power Break circuit breakers.
W
W
W
WA
A
A
AR
R
R
RN
N
N
NIIIIN
N
N
NG
G
G
G:::: Before beginning this procedure, turn
the breaker off, disconnect it from all voltage
sources, and discharge the closing springs.
A
A
A
AV
V
V
VE
E
E
ER
R
R
RT
T
T
TIIIISSS
SSSS
SE
E
E
EM
M
M
ME
E
E
EN
N
N
NT
T
T
T:::: Avant de commencer cette
procédure, mettre le disjoncteur en position OFF, le
déconnecter de toute tension d’alimentation, et
décharger les ressorts de fermeture.
Power Break II Insulated-Case Circuit
Breakers
Power Break II circuit breakers are shipped from the
factory with their Trip Units installed. Removal is
only necessary for replacement or to change the
accessory-configuration switches.
To remove the Trip Unit, perform the following
procedure:
W
W
W
WA
A
A
AR
R
R
RN
N
N
NIIIIN
N
N
NG
G
G
G:::: Before beginning this procedure, turn
the breaker OFF, disconnect it from all voltage
sources, and discharge the closing springs, if they are
charged, by closing and then opening the breaker.
A
A
A
AV
V
V
VE
E
E
ER
R
R
RT
T
T
TIIIISSS
SSSS
SE
E
E
EM
M
M
ME
E
E
EN
N
N
NT
T
T
T:::: Avant de commencer cette
procédure, mettre le disjoncteur en position OFF, le
déconnecter de toute tension d’alimentation, et
décharger les ressorts de fermeture.
1
1
1
1.... Loosen the four #8-32 screws on the breaker
trim-plate assembly and remove the trim plate.
2
2
2
2.... Loosen the four #10-32 screws at the corner of
the breaker cover. Remove the cover from the
breaker face.
3
3
3
3.... Pull the Trip Unit locking lever to the right,
then hold the Trip Unit near the battery cover
and lift it straight out of the breaker.
To reinstall the Trip Unit, perform the following
procedure:
1
1
1
1.... Pull the Trip Unit locking lever to the right.
While holding the lever, carefully align the
connector on the rear of the Trip Unit with the
connector in the breaker. Press down on the
Trip Unit while holding it near the battery
cover. When the Trip Unit is fully seated, slide
the locking lever back to the left.
2
2
2
2.... Reinstall the breaker top cover and tighten the
four #10-32 screws to 32 in-lbs.
3
3
3
3.... Replace the trim plate and tighten the four
#8-32 screws to 20 in-lbs.
Type AKR Low-Voltage Power Circuit
Breakers
Type AKR circuit breakers are shipped from the fac-
tory with their Trip Units installed. Removal is neces-
sary only for replacement. Trip Units are separately
mounted on the breaker structure and are removed
by moving the Trip Unit removal bracket. When a
Trip Unit is replaced, the locking arm snaps back
into place to indicate proper engagement. Refer to
GEH-6303 for detailed instructions on replacing
Trip Units in in Type AKR circuit breakers.