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

4-3. 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.

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

4-4. Volt-Ampere Curves

CV MODE

	80
	70
	60
	50
VOLTAGE	40
	30
	20
	10
	0
	0	100	200	300	400	500	600	700
					AMPERAGE

Volt-ampere curves show minimum and maximum voltage and amperage output capabilities of unit. Curves of other settings fall between curves shown.

. This volt-ampere curve

represents the dynamic output of the unit with a static load.

va_curve1 4/95 − 220 486-A

OM-220 389 Page 15