Duty Cycle And Overheating - Miller Maxstar 300 LX Owner's Manual

4-3. Duty Cycle And Overheating

Overheating
OM-2222 Page 14
250 A @ 60% Duty Cycle For Three-Phase Models
200 A @ 60% Duty Cycle For Single-Phase Models
6 Minutes Welding
0
15
Minutes
Duty Cycle is the percentage of 10
minutes that unit can weld at rated
load without overheating.
If unit overheats, output stops, a
Help message is displayed (see
Section 7-3), and cooling fan runs.
Wait fifteen minutes for unit to cool.
Reduce amperage or voltage, or
duty cycle before welding.
Y Exceeding duty cycle can
damage
warranty.
4 Minutes Resting
A or V
OR
Reduce Duty Cycle
unit and void
ST-186 863 / ST-190 012