GE AKR-30 Series Maintenance Manual page 156

SECTION 1 4-MicroVersaTrip ® Plus and MicroVersaTrip® PM Trip Units
1 4.2 TESTING
Testing of M icroVersaTrip® Plus and MicroVersaTri p®
PM tri p un its may be performed with the trip unit installed
in the circuit breaker, the rating plug installed in the tri p
unit, and the breaker carrying current. The test set catalog
nu mber is TVRMS. The test set plugs into the test socket
of the rating plug.
Test set TVRMS may also be used for MicroVersaTrip®
RMS-9 and Epic M icroVersaTri p® trip u n its. Refer to the
Mai ntenance and Troubleshooting section for additional
detai ls.
1 4.3 PRODUCT STRUCTURE
MicroVersaTrip® P l u s a n d MicroVersaTrip® P M trip un its
are removable. Figures 1 1 1 and 1 1 2 contain front and
rear views of a MicroVersaTri p PM trip unit.
Figure 1 1 2 shows the 36-pin plug that connects either
trip unit to the circuit breaker and eq ui pment circuity. This
plug is cal led the trip unit d isconnect.
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 attem pt 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 approxi mately 25% of the current sensor
rating. This may result in undesired tri pping.
NOTE: Tri p units as received
undesirable for the specific appl ication.
settings are appropriately adjusted before energizing.
78
may have settings that are
Ensure that
FIG. 1 1 1 - FRONT VIEW OF
MICROVERSATRI P ® PM TRI P U NIT
CAUTION
IMI'ORTANT IN$T'AUCTIOfi $ TO£fifSIJJit
I'I'IOP£111 1"flQCMMMEiti'UNCt!ON
""" """" "' " " ' " " ' ""'"' '"'''" "" "'" " """''"" " """ ' ""
.. " """ " ''""'"'""" "' "'"""'""" " " ' ',... " "�
""" " " """' '""""" ""' ' __, . ..,, .... ..,,.
"" - '"" '"''''"' """" "' -'""''"' ' ' "' ""'""'
'""'" "' ""' ' "-"""'"""' ' " "1.''"''-'1>'•
FIG. 1 1 2 - R EAR VIEW OF
M ICROVERSATRI P ® PM TRI P U N IT