SECTION 1 4-MicroVersaTrip® Plus and MicroVersaTrip® PM Trip Units
1 4.2 TESTING
Testing of M icroVersaTrip® Plus and MicroVersaTrip®
PM trip units may be performed with the trip unit installed
in the circuit breaker, the rating plug installed in the trip
unit, and the breaker carrying current. The test set catalog
number 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 MicroVersaTrip® trip units. Refer to the
Maintenance and Troubleshooting section for additional
details.
1 4.3 PRODU CT STRU CTURE
M icroVersaTrip® Plus and MicroVersaTrip® PM trip 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-pin plug that connects either
trip unit to the circuit breaker and equipment circuity. This
plug is called the trip unit disconnect.
CAUTION:
Removal of a trip unit from its breaker must 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 current reduces the breaker's current-carrying
capacity to approximately 25% of the current sensor
rating. This may result in undesired tripping.
NOTE:
Trip
units as received may have settings
that are
u ndesirable for the specific application. Ensure that
settings are appropriately adjusted before energizing.
78
FIG. 1 1 1 - FRONT VIEW OF
MICROVERSATRIP® PM TRIP UNIT
CAUTION
IW'Ofi;TAftt IN$TIWCTIQfiiS TO 1iN$UIII
PIIOf't!l � AmC'fiON
... .............. ,. . .... ,�,-·....,.�>�4< ,. •. , • ...,., ..
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FIG. 1 1 2 - REAR VIEW OF
MICROVERSATRIP® PM TRIP UNIT
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