Welder Generator
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 Miller Legend NT Traditional Series 5000 Watt Generator Welder US $2,399.00
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Can I run a 130 amp mig welder(240v) using a 240 volt 7.5kw generator?
The generator is 7500 watts .....which correct me if i am wrong is what 7.5kw converts to.
The mig welder is 130 amps...
Will the generator run the welder??
Thanks so much for any help...i just dont want to damage my mates generator when i use it for portable welding at the farm.
sorry guys fogot to say it was 20 amps input!!!
Fact is most welders operate at very low voltage ..most never exceed 36volts...and although 130amp is the max the welder operates at ,,your practical range will be a little less than that as well..
So going back to Ohms law we find that on a single phase welder your wattage is around 4680 or 4.68kw if you use the standard 80% value for de-ration your down to 3744 or 3.74kw ..Also the duty cycle is worth looking into as most mig welders are around 35 to 65% unless its a really high quality industrial unit that is capable of 100% operation. This is the actual expended wattage ,line loss ,transformer loss and voltage drop all play a part but in reverse calculations ,that is going from the work to the supply ,it allways takes a little more power to get were you need to be. so as a max i would figure 4500watts or 4.5kw thats about equal to a 20amp 2pole circuit... ..So...your 7.5kw generator will more than run this welder..Have a good one from the E...
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