Duty Cycle - SanRex SANARG 300AP Operator's Manual

3.07 Duty Cycle

The duty cycle of a welding power source is the percentage of a ten (10) minute period that it
can be operated at a given output without causing overheating and damage to the unit. If the
welding amperes decrease, the duty cycle increases. If the welding amperes are increased beyond
the rated output, the duty cycle will decrease.
Exceeding the duty cycle ratings will cause the thermal overload protection circuit
to become energized and shut down the output until the unit has cooled to normal
Continually exceeding the duty cycle ratings can cause damage to the welding
power source and will void the manufactures warranty.
Refer to the Input/Output specification chart in section 3.06.01 to determine the duty cycle based
on input voltage and welding mode.
operating temperature.
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