Power measurement location - all voltages -16, Power measurement location - all voltages – Hypertherm HT4400 HySpeed Plasma Arc Cutting System User Manual
Page 107
MAINTENANCE
5-16
HT4400
Instruction Manual
6
U U
V V
W W
TB5T
B
5
Contactor
CON1
Note: Filter on 400 VAC CE
power supplies only
WARNING
There is line voltage at the contactor if the line disconnect switch is in the ON position, even if 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!
Power Measurement Location - All Voltages
5.
Measure the voltage between the W, V and U terminals of TB5 located in the rear of the power supply.
See figure above. Also refer to the wiring diagram in Section 7, if required. The voltage between any 2
of the 3 terminals should be equal to the supply voltage. If there is a problem at this point, disconnect
main power and check connections, power cable, and fuses at line disconnect switch. Repair and/or
replace defective component(s) if necessary.
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