OPERATION
6-10
6.6 DUTY CYCLE
A self-resetting thermostat will protect the power source if the duty cycle is exceeded.
Example: If the power source operates at a 40% duty cycle, it will provide the rated amperage
for a maximum of 4 minutes out of every 10-minute period. The remaining time,
6 minutes, the power source must be allowed to cool down.
Figure 6-12. Example of 40 % Duty Cycle
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.
Figure 6-13. Example of 50 % Duty Cycle
4 minutes 6 minutes
40% 60%
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