Hobart Welding Products TM-944C Duty Cycle And Overheating, Duty Cycle %, Output Amperes

2-2. Duty Cycle And Overheating

C. 115 VAC Model

	200
	135
	100
Amperes	80
	60
Output	40
	20
	10
		2	4	6	8 10		40	60	80 100
	1					20

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.

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

Duty Cycle %

20% duty cycle at 90 amps

2 Minutes Welding 8 Minutes Resting

D. 230 VAC Model

200

Output Amperes

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 − 196 617 / 196 618

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