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Tool Talk Discussion Forum

Phase converter to run a 3ph. welder?

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Loren

09-09-2004 20:32:40




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Does running a welder from a converter work well or bad idea? Loren




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buickanddeere

09-10-2004 13:04:49




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 Re: Phase converter to run a 3ph. welder? in reply to Loren, 09-09-2004 20:32:40  
The large 600 vac welders around here plug into the three phase receptacle. However inside the welder it's single phase wiring using only two of the three phases.



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loren

09-12-2004 00:07:26




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 Re: Phase converter to run a 3ph. welder? in reply to buickanddeere, 09-10-2004 13:04:49  
Hmm. Wish I also understood more about that. Do you understand how the changeover is worked out inside? Loren



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buickanddeere

09-12-2004 15:25:21




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 Re: Phase converter to run a 3ph. welder? in reply to loren, 09-12-2004 00:07:26  
The welder I wired up had terminals inside for 208/240, 480 and 600V. Single phase with just two live leads and the chassis ground. Oviously a rotary convertor would be a waste of time & money there. Now it's possible that some high frequency or DC machines may use all three phases?



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Loren

09-12-2004 19:58:39




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 Are you familiar with the R3S Lincoln? in reply to buickanddeere, 09-12-2004 15:25:21  
That's what I've got. I'll ask out welding supplies dealer and see if maybe they can tell me if it can be wired single pahse. Loren



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paul

09-11-2004 12:05:24




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 Re: Phase converter to run a 3ph. welder? in reply to buickanddeere, 09-10-2004 13:04:49  
I was wondering how a 3ph welder works. I understand the rotating deal of a 3ph for a motor, but a welder is just a spark, can't see where 3ph would actually help it? But then, I'm an electical dummy.....

--->Paul



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Dieselrider

09-10-2004 03:57:12




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 Re: Phase converter to run a 3ph. welder? in reply to Loren, 09-09-2004 20:32:40  
We have a 10 HP rotary and run a three phase miller on it pretty regular and it seems to work real good.



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Big Jim

09-09-2004 20:43:03




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 Re: Phase converter to run a 3ph. welder? in reply to Loren, 09-09-2004 20:32:40  
I've been told 3ph welders won't run in the inexpensive, capacitor-style converters at all but you should be OK with a rotary type. I've been thinking about getting one just on general purposes because used 3ph stuff goes so cheap.



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Bus Driver

09-10-2004 05:00:34




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 Re: Phase converter to run a 3ph. welder? in reply to Big Jim, 09-09-2004 20:43:03  
I strongly suspect that Big Jim is correct about the need for a rotary convertor for the welder- unless the welder is the motor-generator type. The static convertors depend on the motor to help with the conversion.



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