Miller Electric 625 manual Introduction, Specifications, Duty Cycle And Overheating

SECTION 3 − INTRODUCTION

3-1. Specifications

			RMS Amps Input at Rated Load
	Amperage	Max. Open-	Output, 60 Hz 3-Phase at NEMA
			Load Voltages and Class I Rating
	Range in	Circuit
Rated Welding Output	CC Mode	Voltage	480 V	575 V	KVA	KW
1000 A at 36 VDC,	50−1000A	70 VDC	55	45	46	42
3-Phase			(0.10*)	(0.08*)	(0.09*)	(0.04*)
27% Duty Cycle
*While idling

**See Section 4-2for additional information.

3-2. Duty Cycle And Overheating
				Y Exceeding duty		cycle	can
				damage	unit	and	void
				warranty.
				Percent duty cycle = 1.7 times the
				number of 1 second (1000ms)
	0.750			loads/outputs per minute, without
				overheating. The one second load
	0.625			is the rated output.
				If unit overheats, output stops. A
	0.500			HLP 3 message (see Section 8-4)
SIZE				is displayed, and cooling fan runs.
				Wait fifteen minutes for unit to cool.
STUD	0.375			Reduce amperage or duty cycle be-
				fore welding.
	0.250
	0.125
	0.000
	16	30	40	60
	NUMBER OF STUDS IN ONE MINUTE
		27% Duty Cycle
	.75 second Welding		3.00 seconds Resting
Overheating
		0		A or V
			15
				OR
		Minutes		Reduce Duty Cycle
					sduty1 5/95 / SA-207 877

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