Hobart Welding Products 250 Welding Gun Duty Cycle And Overheating, Volt-Ampere Curves

3-3. Welding Gun Duty Cycle And Overheating

CAUTION

WELDING LONGER THAN RATED DUTY CYCLE can damage gun and void warranty.

•	Do not weld at rated load longer than shown below.
•	Using gasless flux cored wire reduces gun duty cycle.	warn7.1 8/93

Definition

0

10

Minutes

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

.023 To .045 in (0.6 To 1.1 mm)

Hard Or Flux Cored Wires

100% Duty Cycle At 200 Amperes

Using CO2

100% Duty Cycle At 150 Amperes

Using Mixed Gases

Continuous Welding

.023 To .045 in (0.6 To 1.1 mm) Hard Or Flux Cored Wires

60% Duty Cycle At 300 Amperes

Using CO2

60% Duty Cycle At 200 Amperes

Using Mixed Gases

6 Minutes Welding	4 Minutes Resting
	SB1.1 8/93

3-4. Volt-Ampere Curves

Volt-ampere curves show minimum and maximum voltage and amper- age output capabilities of unit. Curves of other settings fall be- tween curves shown.

va_curve1 4/95 − 192 436

OM-192 440 Page 10