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Control and signal cables -4, Power measurement -20, Power measurement – Hypertherm HSD130 HySpeed Plasma User Manual

Page 166

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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.