Miller Electric Welder operating instructions Duty Cycle And Overheating, Volt-Ampere Curves

4-5. 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(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 and void war- ranty.

100% Duty Cycle At 450 Amperes 60% Duty Cycle At 565 Amperes

Continuous Welding	6 Minutes Welding	4 Minutes Resting
Overheating	0	A/V
	15
		OR
	Minutes	Reduce Duty Cycle

duty1 4/95 – 181 560

4-6. Volt-Ampere Curves

Volt-ampere curves show minimum and maximum voltage and amper- age output capabilities of unit. Curves of other settings fall be- tween curves shown.

va_curve1 4/95 – 181 562

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