User Manual

ionMig 200 PFC

3.2 Duty cycle and Over-heat

The letter “X” stands for the duty cycle, which is defined as the proportion of the time that a

machine can work continuously within a certain time (10 minutes). The rated duty cycle means the

proportion of the time that a machine can work continuously within 10 minutes when it outputs the

rated welding current.

The relation between the duty cycle “X” and the output welding current “I” is shown as the right

figure.

If transformer is over-heat, the heat relay inside it will open and will output an instruction to

circuit board, cut AC relay and the output welding current, and brighten the over-heat pilot lamp in

the front panel. At this time, the machine should be relaxed for 15 minutes to cool the fan. When

operating the machine again, the welding output current or the duty cycle should be reduced.