Hobart Welding Products 350LX manual Duty Cycle And Overheating, Volt-Ampere Curves, Minutes

3-4. Duty Cycle And Overheating

Duty Cycle is the percentage of 10 minutes that the unit can weld at rated load without overheating.

If unit overheats, output stops, front panel voltmeter/ammeter displays a HLP3 or HLP5 message (see Section 5-4), and cooling fans run. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle be- fore welding.

Y Exceeding duty cycle can damage unit and void war- ranty.

40% Duty Cycle At 350 Amperes (60 Hz Models Only) 60% Duty Cycle At 300 Amperes

4 Minutes Welding 6 Minutes Resting 6 Minutes Welding 4 Minutes Resting

Overheating

0A

	15
	OR
Minutes	Reduce Duty Cycle

duty1 4/95 / SB-190 276

3-5. Volt-Ampere Curves

The volt-ampere curves show the minimum and maximum voltage and amperage output capabilities of the welding power source. Curves of other settings fall between the curves shown.

ssb1.1 10/91 – ST-

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