Hypertherm H401 Power Supplies - Manual (Page 37)

OPERATION
H401 & H601 Instruction Manual 4-3
4
Operation
H401 or H601 with HT4001
Refer to HT4001 instruction manual 802470 for 200V HT4001 power supplies or 802000 for all other voltage
HT4001 power supplies.
H401 or H601 with PAC500
1. Turn the line disconnect switch on. When the primary power is applied, the power supply cooling fan(s) and the
water supply system will turn on immediately. The DC ON indicator will be extinguished and the power supply
voltmeter will read zero volts.
2. Find the correct current setting from the operating data charts in the PAC500 or PAC500L instruction manuals.
3. Determine the proper power supply dial setting from Figure 4-1. After an arc is established, the setting may be
readjusted to the exact current desired.
4. The start sequence of the plasma arc control in "RUN" mode will close the power supply contactor.
See the PAC500 instruction manual 800370 or PAC500L instruction manual 800460 to operate the PAC500
system.
When the power supply contactor closes, the red DC ON indicator on the front of the power supply (1PL) will
illuminate and the voltmeter will read 400V. After arc ignition, the voltage will drop to 120 – 220 volts, depending on
the operating conditions selected.
Caution: When primary power is applied to the power supply, the water supply system,
if connected, will be energized. Always verify that the water supply line is open
to avoid damage to the pump.