Hypertherm XPR300, Инструкция по эксплуатации

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Diagnostics and Troubleshooting
8
258 809480 Instruction Manual XPR300
Measure the line voltage between the terminals inside the plasma power supply
It is necessary for the cutting system to have electric power to measure line voltage. Use extreme
caution if you do diagnosis or maintenance tasks when the plasma power supply remains
plugged in and the panels on the plasma power supply are removed.
1. Measure the line voltage between the terminals in the following order:

U to V

U to W

V to W

Verify each line to ground.
2. Determine if the voltage between any 2 of the 3 lines is equal to the supply voltage.
3. If any 1 line is equal to or 10% greater than the other 2 lines, examine with the incoming electric
supply lines.

If the incoming electric supply lines are good, contact a licensed
electrician or the electric company that supplies electricity for more
information.
4. If the voltage between any 2 of the 3 lines is less than the supply voltage:
a. Remove the power from the cutting system. (See Remove the power from the cutting
system on page 254.)
b. Examine the power cord for damage.
WARNING
The plasma power supply contains dangerous electric voltages that can
cause injury or death.
Even if the plasma power supply is turned OFF, you can still get a
serious electric shock if the plasma power supply remains plugged in to
an electric outlet.
Use extreme caution if you do diagnosis or maintenance tasks when the
plasma power supply remains plugged in and the panels on the plasma
power supply are removed.
When the line-disconnect switch is in the ON position, there is line
voltage at the contactor and the power distribution PCB.
Voltages present at the terminal block and contactors can cause injury
or death.
Use extreme care when you measure the primary power in these areas.