Ground Fault Circuit Interrupters (Gfci) 60 Hz-Test Daily - Vanguard CPW 125-4-S Series Operation And Maintenance Manual

Ground Fault Circuit Interrupters (GFCI) 60 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.
RC 1 RC 2
Figure 55: 60 Hz GFCI test
1. With the genset running and the main breaker (CB1) set, ensure that all of the 60 Hz auxiliary-supply circuit
breakers (CB3 through CB9, and CB16) are set.
2. With a load—such as a light—plugged into a front mounted receptacle—RC1 through RC7—and turned on (or a
multimeter can also be used to indicate the supply voltage). Press the GFCI test button. 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 switch to ON.
4. Repeat the test for each front-mounted receptacle.
Note: If a GFCI trips without pressing its test button with any type of load—test-load or normal operating load—plugged
into its corresponding receptacle, then there is a problem with the load or the connected circuit which must be checked and
corrected by a qualified electrician.
037-08OP-002D-01
60Hz, Single Phase
circuit breakers
with Ground Fault
Circuit Interrupters,
CB17 - CB 23
037-05-63-311B
RC 6
RC 3 RC 4 RC 5
037-05-63-315A
S/N CB50600021 – UP (Weld-deck)
RC 7
GFCI TEST
BUTTONS
GFCI TEST
BUTTONS
GFCI TEST
BUTTONS
GFCI TEST
BUTTONS
037-05-63-314A
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