Duty cycle and overheating, 2. duty cycle and overheating – Hobart Welding Products HANDLER OM-925 217 694A User Manual
Page 14
OM-925 Page 10
3-2.
Duty Cycle And Overheating
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.
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
duty1 4/95 − 217 623-A / 217 757-A
A. 115 VAC Model
B. 230 VAC Model
20% duty cycle at 90 amps
30% duty cycle at 130 amps, 60 Hz
20% duty cycle at 130 amps, 50 Hz
1
4
10
20
40
60
100
2
6
80
8
10
20
40
60
80
100
200
140
Duty Cycle %
Output Amperes
10
20
40
60
80
100
200
10
20
30
40
50
60
70
80
100
130
180
Duty Cycle %
Output Amperes
3 Minutes Welding
7 Minutes Resting
2 Minutes Welding
8 Minutes Resting