Ground Fault Circuit Interrupters (Gfci) 50 Hz-Test Daily - Vanguard CPW 125-4-S Series Operation And Maintenance Manual

Ground Fault Circuit Interrupters (GFCI) 50 Hz—Test Daily
To ensure that they are functioning properly, the ground fault circuit interrupters (GFCI) must be tested at the start of each
working day, or whenever there is an unusual occurrence such as a severe electrical storm.
60Hz panel shown. Contact
Vanguard for available 50 Hz front
panels.
Figure 56: 50 Hz GFCI test
1. With the genset running and the main breaker (CB1) set, ensure that all of the 50 Hz auxiliary-supply circuit breakers
(CB17 through CB23) are set.
2. Each of the individual 50Hz feeder circuit breakers, CB22 and CB 23, incorporates a Ground Fault Circuit Interrupter
(GFCI). With a load—such as a light—plugged into a front mounted receptacle and turned on (or a multimeter can also
be used to indicate the supply voltage). Press the GFCI test button on the corresponding feeder circuit breaker: CB22
feeds receptacles RC13 through RC15, CB23 feeds receptacles RC116 and RC17. The GFCI circuit breaker should trip
and the light must go out, or the voltage reading goes to zero. If the light does not go out, or the voltage does not go to
zero, then there is a problem with the GFCI and it must be replaced by a qualified electrician. Note: Replace GFCIs using
only the same style and current rating; contact VEI or refer to the Parts Manual, Weld-Deck Welding Package CPW 125-
4-S2-4 for suitable replacement parts information.
3. Reset the GFCI by turning the circuit breaker's switch to ON.
4. Repeat the test for each front-mounted receptacle.
037-08OP-002D-01
50Hz feeder circuit
breakers, CB 22
and CB 23, with
Ground Fault
Circuit
037-05-63-311B
S/N CB50600021 – UP (Weld-deck)
GFCI
TEST
GFCI
TEST
037-05-63-314A
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