5-30 HPR400XD Manual Gas Instruction Manual
MAINTENANCE
Power measurement
Note: Check lines in the following order:
U to V
U to W
V to W
Check each line to ground. If one line
is 10% or higher than the other 2,
put that leg on U.
DANGER
There is line voltage at the contactor and the power distribution board (PCB2) when the line
disconnect switch is ON. Use extreme care when measuring primary power in these areas. Voltages
present at the terminal block and contactors can cause injury or death.
U
V W
Ground
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