Hobart Welding Products OM-925 217 694A Duty Cycle And Overheating, Amperes, Output Duty Cycle %

3-2. Duty Cycle And Overheating

A. 115 VAC Model

	200
	140
Amperes	100
	80
	60
	40
Output
	20
	10
	1	2	4	6	8	10	20	40	60	80 100

Duty Cycle %

20% duty cycle at 90 amps

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.

YExceeding duty cycle can damage unit or gun and void warranty.

2 Minutes Welding 8 Minutes Resting

B. 230 VAC Model

Output Amperes

200

180

130

100

80

60

40

20

10

10 20 30 40 50 60 70 80 100

Duty Cycle %

30% duty cycle at 130 amps, 60 Hz

20% duty cycle at 130 amps, 50 Hz

3 Minutes Welding 7 Minutes Resting

Overheating

0

A or V

15

OR

Reduce Duty Cycle

Minutes

duty1 4/95 − 217 623-A / 217 757-A

OM-925 Page 10 Return To Table Of Contents