OM-1330 Page 10
4-2. Duty Cycle And Overheating
Duty Cycle is percentage of 10
minutes that unit can weld at rated
load without overheating.
If unit overheats, thermostat(s)
opens, output stops, and cooling
fan runs. Wait fifteen minutes for
unit to cool. Reduce amperage or
duty cycle before welding.
YExceeding duty cycle can
damage unit or gun and void
warranty.
Overheating
0
15

A or V

OR
Reduce Duty Cycle
Minutes
duty1 4/95 − 124 655 / 220 896-A

A. 115 VAC

B. 230 VAC

20% duty cycle at 90 amps
40% duty cycle at 150 amps
4 Minutes Welding 6 Minutes Resting
2 Minutes Welding 8 Minutes Resting