 Miller Bobcat 3 Phase Engine Drive Welder / Generator - 907505 US $3,861.00 
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 Miller Bobcat 3 phase 907505 Kohler Engine Welder / Generator US $3,861.77
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Hi, I have a 10KVA 3 phase generator, i want to use a welder with this generator but its not working properly?
The wiring is done so that the single phase power supply is just one of the 3 phases. Am i correct that this single phase/line is 3.3KVA ?? and, is ir possible to wire the 3 phases together to give me 10KVA (or higher than 3.3KVA) SINGLE phase power?? It seems that the welder is not getting enough power...??
The wiring is done so that the single phase power supply is just one of the 3 phases. Am i correct that this single phase/line is 3.3KVA ?? and, is ir possible to wire the 3 phases together to give me 10KVA (or higher than 3.3KVA) SINGLE phase power?? It seems that the welder is not getting enough power...?? What I think i need to do is up the amps, so if I increase the KVA, and I use the same Volts, more amps should be available?? Can i just bridge the 3 wires from the 3 phases?? And what about the frequancy of the current?? would it go up from 60 to 180?? would this damage the welder??
Certain 3-phase generators can be rewired to operate as single phase. If the alternator has 12 wires, you can reconfigure the system for 120/240V single phase. The maximum output power will be reduced to 6.6kVA at 240V. Maximum power available from each 120V line remains 3.3kVA.
Here is a picture I sketched earlier to show how this works. It is clearly not to be used as instructions for you to rewire your generator.
http://members.rennlist.com/warren/3-phase.jpg
You could also wire the system for 120V single phase only. In this mode, maximum power would be 6.6kVA.
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