Hobart Welding Products 150 STI manual Specifications and Installation, Duty Cycle And Overheating

SECTION 4 − SPECIFICATIONS AND INSTALLATION

4-1. Specifications

Input Power		Welding	Max	Amperes In-	KVA @
	Rated Welding			put At Rated
Single-Phase						KW	Dimensions	Weight
	Output	Amperage	OCV	Load Output,	Duty
AC		Range	DC	50/60Hz,	Cycle
				Single-Phase
	70A @ 22.8 Volts DC,			17.4	2.0	1.9
	100% Duty Cycle		90V
115 Volts Stick		20 − 100A
			*12-16
	100A @ 24.0 Volts DC,			26.4	3.0	3.0
	35% Duty Cycle
	100A @ 14.0 Volts DC,			18.4	2.1	2.1
	100% Duty Cycle		90V
115 Volts TIG		5 − 150A
			*12-16
	150A @ 16.0 Volts DC,			28.0	3.4	3.1	H: 9 in (229 mm)
								13.7 lb
	30% Duty Cycle
							W: 5.5 in (140 mm)	(6.2 kg)
	100A @ 24 Volts DC,
				13.1	3.0	2.8	L: 13.25 in (337 mm)
	100% Duty Cycle		90V
230 Volts Stick		20 − 150A
			*12-16
	150A @ 26.0 Volts DC,			21.6	4.9	4.7
	30% Duty Cycle
	100A @ 14.0 Volts DC,			8.3	2.0	1.9
	100% Duty Cycle		90V
230 Volts TIG		5 − 150A
			*12-16
	150A @ 16.0 Volts DC,			14.2	3.2	3.1
	30% Duty Cycle
*Sense Voltage For Stick And TIG Lift Arct

4-2. Duty Cycle And Overheating

	250
Amperes	200
	150	Stick (230V)
		TIG (115 &230V)
Output	100
	50	Stick (115V)

0
10	% Duty Cycle

Duty Cycle is percentage of 10 min- utes that unit can weld at rated load without overheating.

If unit overheats, output stops, the Overtemperature Light comes On, and the cooling fan runs. Wait fif- teen minutes for unit to cool. Re- duce amperage or duty cycle be- fore starting to weld again.

YExceeding duty cycle can damage unit and void warranty.

100

208 608-C

4-3. Volt-Ampere Curves

100

	Volt-ampere curves show minimum and maximum voltage and amperage output capabilities
	of welding power source. Curves of other settings fall between curves shown.
115 VAC Input	100	230 VAC Input

80

Volts	60
	40

20

0 0

		TIG/Stick Max
	TIG Min
	Stick Min
50	100	150
	Amperes

80

60 Volts 40

20

0

200 0

TIG/Stick Max

	TIG Min
	Stick Min
50	100	150	200
	Amperes		208 604-B

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