3-3. Duty Cycle And Overheating

Duty Cycle is percentage of 10 min- utes that unit can weld at rated load without overheating.

If unit overheats, thermostat opens, output stops, light goes on (CE models only), and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle be- fore welding.

Y Exceeding duty cycle can damage unit and void warranty.

40% Duty Cycle At 250 Amperes (60 Hz Models Only)

4 Minutes Welding

6 Minutes Resting

60% Duty Cycle At 200 Amperes

6 Minutes Welding

4 Minutes Resting

Overheating

0

A

 

15

 

OR

Minutes

Reduce Duty Cycle

 

duty1 4/95 / SB-116 198

Syncrowave 250

TM-353 Page 7

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Image 11
Miller Electric TM-353E manual Duty Cycle And Overheating, 60% Duty Cycle At 200 Amperes