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16
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.
Installing the Fourth-Wire Disconnect
AK-50 & AKS-50 Stationary Breakers
The fourth-wire disconnect for stationary breakers
consists of a terminal board mounted to the lower
front channel, as shown in Figure 24.
• If the terminal board is already present on the
breaker, just replace the control harness. Main-
tain the following color code: white wire to
common, black wire to the tap.
• If the terminal board must be added, mount it as
shown in Figure 24. The mounting holes may
have to be added to the front channel.
Figure 24. Fourth-wire terminal board installation on AK-50 &
AKS-50 stationary breakers.