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8. Install the new MicroVersaTrip Plus™ or MicroVersa
Trip PM
TM
Trip Unit by aligning the holes in the back
of
the Trip Unit with the guide pins
mounting plate, as illustrated
down firmly on
PROGRAMMER RELEASE LEVER.
9. Install the breaker cover ( and line shield, if
applicable ) and escutcheon plate.
10. Initialize the Trip Unit settings as described
in GEH-6273.
AKR Type Circuit Breakers
(225-5000 A Frames)
Use the following procedure to install an enhanced
MicroVersaTrip Plus or MicroVersaTrip PM Trip Unit in an
AKR breaker.
1. Disconnect all power to the circuit breaker.
2. Open the breaker by pressing the red TRIP button
on the front of the breaker escutcheon. Disconnect
any secondary wire harnesses between the breaker
and the switchgear. On draw-out breakers, rack the
breaker all the way out to the DISCONNECT position.
3. Follow the instructions on the label attached to
the PROGRAMMER RELEASE LEVER to remove the
Trip Unit. There are three types of mounting plates,
as follows:
• On one type, push in the lever to release the Trip
Unit.
• A newer mounting system requires pulling out the
lever to release the Trip Unit, as shown in Figure 8.
• The third design uses a lever that wraps around to
the front of the unit. The Trip Unit is released by
pushing down on the lever, as shown in Figure 9.
4. If the breaker was equipped with a MicroVersaTrip® 9
Trip Unit, the 36-pin trip unit connector must be
removed and remounted on the adapter bracket
provided. Slide the connector out of the mounting
plate and install it on the adapter bracket, as
illustrated in Figure 2.
WARNING: The adapter bracket must be installed
onto the harness plug as shown in Figure 2. Failure
to do so will result in failure of the harness plug and
the Trip Unit will not provide protection.
in
Figure 7. Push
the
trip Unit, then push in the
on
the
Figure 7. Installation of new Trip Unit on
Figure 8. Programmer release lever on newer
Figure 9. Programmer release lever on older
2500-4000 A Power Break breaker.
AKR breakers.
AKR breakers.
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