Duty Cycle And Overheating - Miller XMT 400 CC/CV Owner's Manual

4-2. Duty Cycle And Overheating

100% Duty Cycle At 300 A
Continuous Welding
Overheating
OM-139 426 Page 14
60% Duty Cycle At 400 A
6 Minutes Welding
0
15
Minutes
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, over temperature
light goes On and output stops. Let
fan run for fifteen minutes. Reduce
amperage or duty cycle before
welding.
.
Unit is equipped with Fan-On-
Demand. Fan only runs when
cooling is necessary.
Y Exceeding duty cycle can
damage unit and void war-
ranty.
4 Minutes Resting
A
OR
Reduce Duty Cycle
duty1 4/95 / ST-132 583