Duty Cycle And Overheating - MAC TOOLS MW135 Owner's Manual

2-2. Duty Cycle And Overheating

A. 120 VAC Model
B. 230 VAC Model
Overheating
OM-210 089 Page 10
30%dutycycle at 90 amps
3 Minutes Welding
30%dutycycle at 130 amps, 60 Hz −
20% duty cycle at 130 amps, 50 Hz
3 Minutes Welding
0
Minutes
7 Minutes Resting
7 Minutes Resting
15
OR
Reduce Duty Cycle
Duty Cycle is percentage of 10
minutes 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 or gun and void
warranty.
A or V
duty1 4/95 − SA-802 090 / SA-802 091