Hi all,
I think the arc welder I have may be faulty. It's an old Olympic one from t he early 80s and looks indistinguishable from an Oxford of the same vintage and amperage. This thing can run off 3 phase or single and I have it hooked up to the 230 v mains just for test purposes. The input connectors are marked: 415V, 400V , 230V, 0V and earth. I've connected the mains live to the 230v terminal, t he nuetral to the 0V one, and earth to earth. It hums reassuringly when pow ered up, but there's no output voltage present at all so far as I can see, for either the 50V or the 80V outputs. Is there something obvious I've overlooked here? Should I short the unused inputs together, for example? Or tie 'em to ground? How likely is it that t he secondary winding in something this substantial could fail? Looks like I 'm gonna have to take the lid off, but I thought I'd run it past you guys f irst, just in case there's something else I should check first...
thanks.