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4-4. Duty Cycle And Overheating
500
425
400
350
300
250
200
150
100
10
20
15
Overheating
Notes
30
40
50
60 70 80 90 100
25
% DUTY CYCLE
60% Duty Cycle
6 Minutes Welding
0
Minutes
Duty Cycle is percentage of 10 minutes that
unit can weld at rated load without overheating.
If unit overheats, output stops, a Help mes-
sage is displayed and cooling fan runs. Wait fif-
teen minutes for unit to cool. Reduce amper-
age or voltage, or duty cycle before welding.
.
NOTICE − Exceeding duty cycle can damage
unit and void warranty.
THREE PHASE
OPERATION
6AWG POWER CORD
8AWG POWER CORD
4 Minutes Resting
15
OR
Reduce Duty Cycle
Single Phase Operation: The unit is sup-
plied with a 8 AWG power cord. The
rated output with 8 AWG is 300 amps,
32 volts at 40% duty cycle. To achieve
60% duty cycle change cord to 6 AWG.
SINGLE PHASE
OPERATION
A or V
Ref. 216 568-A
OM-2251 Page 13
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