12
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. Figure 27 shows the sensor outlines for the
3000 A through 4000 A frame sizes.
2.
Connect the neutral sensor wire harness to the correct taps
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, routed
through the rear of the breaker with the CT wires. The
wires should be tied to the breaker frame in an easily
accessible location.
