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4-7. Duty Cycle And Overheating
500
425
400
350
300
250
200
150
100
10
Overheating
4-8. Static Output Characteristics
The static (output) characteristics of the welding power source can be described as flat during the GMAW process and drooping during the SMAW
and GTAW processes. Static characteristics are also affected by control settings (including software), electrode, shielding gas, weldment material,
and other factors. Contact the factory for specific information on the static characteristics of the welding power source.
.
A complete Parts List is available at www.MillerWelds.com
15
20
25 30
40
% DUTY CYCLE
60% Duty Cycle
6 Minutes Welding
0
Minutes
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, output stops, a
Help message is displayed and
cooling fan runs. Wait fifteen min-
utes 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
50 60 70 80 90 100
4 Minutes Resting
15
OR
Reduce Duty Cycle
A or V
Ref. 219 523-A
OM-245171 Page 15