Miller Electric Auto-Axcess 450 manual Duty Cycle And Overheating, Volt-Ampere Curves

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(s) opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle before welding.

NOTICE − Exceeding duty cycle can damage unit and void warranty.

100% Duty Cycle At 450 Amperes 60% Duty Cycle At 580 Amperes

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

duty1 4/95 − 220 485-A

3-4.		Volt-Ampere Curves
				CV MODE				Volt-ampere curves show minimum
								and	maximum	voltage	and
	80							amperage output		capabilities of
								unit. Curves of other settings fall
								between curves shown.
	70							. This volt-ampere curve
	60								represents the dynamic output
									of the unit with a static load.
VOLTAGE	50
	40
	30
	20
	10
	0
	0	100	200	300	400	500	600	700
				AMPERAGE
									va_curve1 4/95 − 220 486-A
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