Duty Cycle And Overheating - Miller MILLERMATIC DVI Owner's Manual

4-2. Duty Cycle And Overheating

A. 115 VAC
B. 230 VAC
Overheating
OM-1330 Page 10
20% duty cycle at 90 amps
2 Minutes Welding
40% duty cycle at 150 amps
4 Minutes Welding
0
Minutes
8 Minutes Resting
6 Minutes Resting
15
OR
Reduce Duty Cycle
Duty Cycle is percentage of 10 min-
utes 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.
Y Exceeding duty cycle can
damage unit or gun and void
warranty.
A or V
duty1 4/95 − 124 655 / 220 896-A