Hypertherm HSD130 HySpeed Plasma - Manual (Page 166)

MAINTENANCE
5-20 HySpeed HSD130 RHF Instruction Manual
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 two, put that
leg on U.
U
V
W
Ground
U
V
W
Ground
DANGER
There is line voltage at the contactor when the line disconnect switch is ON, even if the the circuit
breaker on the power supply is OFF. Use extreme caution when measuring primary power in these
areas. Voltages present at the terminal block and contactors can cause injury or death.