Hypertherm HPR260 Manual Gas Preventive Maintenance Program Rev.5 - Manual (Page 169)

MAINTENANCE
HPR260 Auto Gas Instruction Manual 5-25
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 after the line disconnect switch is ON, even if the the circuit
breaker on the power supply is OFF. Use extreme care when measuring primary power in these areas.
Voltages present at the terminal block and contactors can cause injury or death.
PE
W V
U
5