.A complete Parts List is available at www.HobartWelders.com

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

 

200

 

 

 

 

 

 

 

 

unit to cool. Reduce amperage or

 

 

 

 

 

 

 

 

 

duty cycle before welding.

 

 

 

 

 

 

 

 

 

 

 

140

 

 

 

 

 

 

 

 

NOTICE − Exceeding duty cycle

Amperes

 

 

 

 

 

 

 

 

 

can damage unit or gun and void

100

 

 

 

 

 

 

 

 

warranty.

 

 

 

 

 

 

 

 

 

 

80

 

 

 

 

 

 

 

 

 

Output

60

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

10

2

4

6

8

10

 

40

60

80 100

 

1

20

 

 

 

 

Duty Cycle %

 

 

 

 

 

 

 

 

 

20% duty cycle at 90 amps

 

 

 

 

 

 

2 Minutes Welding

 

8 Minutes Resting

 

 

Overheating

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

A or V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

OR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minutes

 

 

Reduce Duty Cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

duty1 4/95 − 217 623-A

OM-925 Page 12

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Image 16
Hobart Welding Products 217 694E, OM-925 Duty Cycle And Overheating, Output Duty Cycle %, Can damage unit or gun and void