Duty Cycle And Overheating - Miller XMT 450 CC/CV Owner's Manual

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4-7. Duty Cycle and Overheating

100% Duty Cycle At 450 Amperes
Continuous Welding
Overheating
OM-257220 Page 16
60% Duty Cycle At 580 Amperes
6 Minutes Welding
0
15
Reduce Duty Cycle
Minutes
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.
NOTICE − Exceeding duty cycle
can damage unit and void warranty.
4 Minutes Resting
A/V
OR
duty1 4/95 − SA-181 560 / 250 541-A