Advertisement
Power Break® Circuit Breakers
(2500-4000 A Frames)
WARNING: All metal parts of the internal mechanism are
always live when the breaker is bottom or reverse fed,
even in the OFF position.
Use
the
following
Enhanced MicroVersaTrip Plus™ or MicroVersaTrip PM™
Trip Unit in an 2500-4000 A Power Break breaker,
as illustrated in Figure 4.
1. Disconnect all power to the circuit breaker.
2. Open the breaker by pushing the red OFF button
on the front of breaker cover. With draw out
breakers, rack the breaker all the way out.
3. Remove the escutcheon plate over the programmer.
The escutcheon plate is held in place with four screws,
one at each corner of the plate on the front of the
breaker, as shown in Figure 4.
4. Remove the breaker cover and line shield (if present).
The cover is held in place by four large screws in the
barrier separating the phases, as shown in Figure 5.
5. On
the bottom
PROGRAMMER RELEASE LEVER in toward the Trip
Unit and lift the old unit out
6. If the breaker was equipped with a MicroVersaTrip®
4 or MicroVersaTrip 9 Trip Unit (catalog number has
a V in the third or fourth digit), the 36-pin trip
unit connector must be removed and remounted
on the adapter bracket provided.Remove the two
screws holding the trip unit mounting plate to the
center-phase sensor shell, as shown in Figure 6. A
small pencil magnet can be used to hold the nuts in
place in the shell.
7. Slide the connector out of the mounting plate and
install it on the adapter bracket, as illustrated in
Figure 2. Reinstall the trip unit mounting plate.
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.
procedure
to
install
of the Trip Unit, push the
•
§
'
I! --- --
an
Figure 4. Escutcheon plate removal on
2500-4000 A Power Break breaker.
Figure 5. 3000 A Power Break circuit
Figure 6. Trip unit mounting plate on 2500-4000
A Power Break® breaker.
-
--
.
-"'-
-· -
,.
E503=
breaker.
Advertisement
