GE Industrial Solutions MicroVersaTrip Plus and MicroVersaTrip PM for Allis Chalmers, Siemens_Allis, and Siemens LA-600[F] and LA-1600[F] (Blue) - Manual (Page 13)

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SECTION 5. INSTALLING THE TRIP UNIT
Use the following procedure to install the trip unit.
1. Pull out the locking lever on the trip unit mounting plate until
it snaps into the open position, as shown in Figure 16.
2. Carefully line up the pins in the rear connector with the
connector on the mounting plate. The alignment pin on the
rear of the trip unit must fit in the hole in locking lever.
3. Push the trip unit against the mounting plate until it locks into
position. The locking lever will automatically snap back to
secure the trip unit. Figure 20 shows an installed trip unit.
4. The breaker escutcheon may be attached and the breaker
testing started.
To remove the trip unit, slide out the locking lever to release the
alignment pin, then carefully pull the trip unit straight off the
mounting plate.
See GEH-6273 for detailed instructions on setting up
MicroVersaTrip Plus and MicroVersaTrip PM trip units.
Figure 20. Trip unit installed on the breaker (LA-1600 shown).
SECTION 6. FOUR-WIRE GROUND FAULT
OPTION
The ground fault option for four-wire installations requires the
installation of an additional current sensor on the neutral bus in
the equipment. The sensor is connected to the trip unit through
the connector provided in the wiring harness.
1. Mount the neutral sensor on the outgoing neutral lead,
normally in the bus or cable compartment in the equipment.
2. Connect the neutral sensor wire harness to the correct
terminals on the sensor. To maintain the same polarity as the
phase sensors, connect the white wire to the common
terminal, black to the tap.
3. Route the wires through the equipment and connect to the
two-pin connector on the trip unit wiring harness. The wires
should be tied to the breaker frame in an easily accessible
location.