TM 5-3895-374-24-1
SYSTEM TEST PROCEDURES
GROUND FAULT PROTECTION SYSTEM
TYPE GC
A.
These tests are to be performed by qualified personnel only
B.
Visually check that the busses of the circuit to be protected are Installed through the window of GA-12 sensor.
C.
Remove power. The grounding points of the system shall be verified to determine that ground paths do not exist
Disconnect neutral from system ground at power distribution panel Connect megohm meter between neutral and
ground to verify that no extraneous grounds exist downstream (beyond ground fault sensor) on neutral line.
Reconnect neutral line; restore power and continue with test.
D.
Ground Censor Test Only
System Test
(Service Maintained)
(Service Interrupted)
1. Press and hold test button
1.
Press test and reset buttons simultaneously
2. After the relay times out, lamp L1 on
2.
After the relay times out, lamps L1 and L2 monitor
panel turns on to indicate com-
turn on and the disconnect the coil picks up.
ponents are working properly
3.
Releasing the test button automatically resets
3. Releasing the test button automatically
the ground fault relay.
resets the ground fault relay
NOTE: If additional testing Is necessary, allow 30 seconds before repeating above procedures.
E.
Record test results on reverse side.
(page 3-86)
