Duty Cycle And Overheating - Miller Maxstar 200 STR Owner's Manual

4-5. Duty Cycle And Overheating

Overheating
90 A @ 100% Duty Cycle For 115 Volt Single-Phase Stick Process
125 A @ 100% Duty Cycle For 115 Volt Single-Phase TIG Process
150 A @ 60% Duty Cycle For Stick Process (Other Voltages)
175 A @ 60% Duty Cycle For TIG Process (Other Voltages)
6 Minutes Welding
0
Minutes
4 Minutes Resting
15
OR
Reduce Duty Cycle
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, output stops, and
cooling fan runs. Wait fifteen min-
utes for unit to cool. Reduce amper-
age or duty cycle before welding.
NOTICE − Exceeding duty cycle
can damage unit and void warranty.
A or V
189 770-A
OM-2233 Page 17