Miller Electric 456 CC manual Specifications, Duty Cycle And Overheating

SECTION 4 − INSTALLATION

.This manual contains information on CC and CC/CV units. Differences between models are noted throughout this manual.

4-1. Specifications

Input	Rated Welding	Amperage	Voltage	Maximum	Amperes Input At Rated Load
				Open-	Output 50 Hz, Three-Phase
Power	Output	Range	Range	Circuit
				Voltage DC	380 V	400 V	KVA	KW
Three	450 A @ 38 Volts DC,
	100% Duty Cycle;	5 − 600	10 − 38	95	33	31	21.6	19.4
Phase	550 A @ 42 Volts DC,
	60% Duty Cycle

4-2. 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 565 Amperes

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

duty1 4/95 − SA-181 560

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