GE AKR-30 Series Maintenance Manual page 256

SECTION 1 4-MicroVersaTrip® Plus and MicroVersaTrip® PM Trip U nits
1 4.2 TESTING
Testing of M icroVersaTrip® Plus and M icroVersaTrip®
P M tri p units may be performed with the tri p unit installed
in the circuit breaker, the rating plug installed in the trip
unit, and the breaker carrying c urrent. The test set catalog
num ber is TVRMS. The test set plugs into the test socket
of the rating plug.
Test set TVRMS may also be used for M icroVersaTrip®
RMS-9 and Epic MicroVersaTri p® tri p units. Refer to the
Maintenance and Troubleshooting section for additional
details.
1 4.3 PRODU CT STRU CTURE
M icroVersaTrip® Plus and MicroVersaTrip® PM tri p units
are removable. Figures 1 1 1 and 1 1 2 contain front and
rear views of a M icroVersaTrip PM trip unit.
Figure 1 1 2 shows the 36-p in plug that connects either
trip unit to the circuit breaker and eq uipment circuity. This
plug is called the trip unit d isconnect.
CAUTION: Removal of a trip unit from its breaker m ust be
performed with the breaker in the OPEN or TRIPPED
position. Draw-out breakers should be racked out first.
CAUTION: Do not attempt to operate the breaker without
its assigned trip unit. Installation of an incorrect trip unit
may result in unsafe operation of the breaker.
CAUTION: Removal of the rating plug while the breaker
is carrying cu rrent reduces the breaker's current-carrying
capacity to approximately 25% of the current sensor
rating. This may result in un desired tripping.
NOTE:
Trip
u n its a s received may have settings
u ndesirable for the specific application.
settings are appropriately adjusted before energizing.
78
MICROVERSATRI P ® PM TRIP U N IT
that are
Ensure that
M ICROVERSATRIP® PM TRIP U N IT
FIG. 1 1 1 - FRONT VIEW OF
CAUTION
IW'Ofi;TAftt IN$TIWCTIQfii S TO 1iN$UIII
PII Of't!l � AmC'fiON
... .... .. . .. . .. . . ,. . .... ,�,-·....,. � >�4< ,. •. , • ...,. , ..
"""""'"''""'"'"'""'""""- ' "' '""'"""
FIG. 1 1 2 - REAR VIEW OF