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OM-196 188 Page 23
4-5. Duty Cycle And Overheating
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 and void war-
ranty.
Overheating
0
15
A/V
OR
Reduce Duty Cycle
Minutes
duty1 4/95 – 181 560
Continuous Welding
100% Duty Cycle At 450 Amperes 60% Duty Cycle At 565 Amperes
6 Minutes Welding 4 Minutes Resting
4-6. Volt-Ampere Curves
va_curve1 4/95 – 181 562
Volt-ampere curves show minimum
and maximum voltage and amper-
age output capabilities of unit.
Curves of other settings fall be-
tween curves shown.