Duty Cycle And Overheating - Hobart Handler 135 Owner's Manual

2-2. Duty Cycle And Overheating

A. 115 VAC Model
200
135
100
80
60
40
20
10
1
B. 230 VAC Model
200
130
100
80
60
40
20
10
10
Overheating
OM-944 Page 10
4 6 8 10
2
Duty Cycle %
20% duty cycle at 90 amps
2 Minutes Welding
20 30
Duty Cycle %
30% duty cycle at 130 amps, 60 Hz
20% duty cycle at 130 amps, 50 Hz
3 Minutes Welding
0
Minutes
40 60 80 100
20
8 Minutes Resting
60 70 80 100
40 50
7 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, 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 – 196 617 / 196 618