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2. duty cycle and overheating – Hobart Welding Products HANDLER 140 User Manual

Page 14

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OM-925 Page 10

4-2. 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

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