I also have a Lincoln Idealarc DC-1500 welder which I need to test. (1,500 amp, 1,800 lbs monster). (I want to be clear that whether I can at all get any life out of it with a 10 kVa single phase transformer, is not obvious)
This is the prelude.
The story is that one of the mystery devices that I brought turns out to be what I long wanted to get, which is a 10 kVa ACME Transformer.
It is a multitap thing that allows buck/boost adjustments of a few percent. It has various taps that I could use if, say, I have 490 volts input and want 240v output. It is nicely laid out inside a hexagonal transformer box, whose windings are sealed with epoxy.
My first question is, am I correct in assuming that I could use it in reverse to get 460v from 240, at some reduced kVa. Also, what is the realistic kVa number I could get from it.
So, my thinking goes, to make it into a 240-460 transformer, I should allow for some losses and wire it according to the diagram connection for 480 volts. Then under load, and due to losses, the voltage would drop a little to 460. Right?
The bonus question is whether this thing could power a 10 HP motor to make three phase 460v.
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