5 OPERATION
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5.8
Duty cycle
The EMP 235ic has a welding current output of 235 A at 25% duty cycle (230 V). A
self-resetting thermostat will protect the power source if the duty cycle is exceeded.
Example:
If the power source operates at a 25% duty cycle, it will provide the rated
amperage for a maximum of 2.5 minutes out of every 10 minute period. The remaining time,
7.5 minutes, the power source must be allowed to cool down.
2.5 minutes
7.5 minutes
A different combination of duty cycle and welding current can be selected. Use the graphs
below to determine the correct duty cycle for a given welding current.
Duty cycle on 120 V AC
