My opinion is that under full load, your singe phase source is woefully
lacking. It should otherwise work fine so long as the wild leg isn't a
part of the control circuitry of the welder. I'm curious what those that
really understand phase converters will have to say, though. I am to
electricity what most machinists are to ballet dancing. <g>
I run 2 Fadal and a Fanuc machining center off that converter all at the
same time--Im not seeing where the load would be that much different, its
not like theres any big motors that gotta spin up.
Im a bit worried of electrical noise though, and thinking probly best not to
weld at the same time as Ive got any cnc running.
I will check back once I get it all wired in.
It is pulsed dc.
CV / CC
There is 3 sections on the input transformer, I know because I changed all
the taps over from 440 to 220 operation just yesterday.
I could probably just use a large capacitor bank to the wild leg and go with
about a 100 amp single phase feed, but since I already got a large phase
converter its probly easier to just use that instead.
The 400 amp capacity at 60% duty is something I will probly never need, more
like 200 amps with 100% duty cycle instead.
I still need to buy wire and conduit, ect and so wont get back to it till
sometime next week--ours is not a hobby shop but I still felt this was
probly the best place to post my question.
Thanks for the input.
I'm curious. Is this a rotary machine, or a 'solid state' welder? If it
is not a rotary machine, I'd think the "large capacitor bank to the wild
leg" would be an unnecessary expense.
I'd have to study the schematic before deciding to plug it into single
phase, but, I'd expect the welder to function at a diminished capability
when fed single phase.
I was considering the situation to be one of trying to weld with the ESAB
PULSE-ARC 400 (which was designed to be run from 240VAC 3 phase) when only
single phase is available.
If I had this situation, I'd sure try to feed the welder from a big rotary
converter. I wouldnt even try to feed single phase to it with that bank of
capacitors to the "wild leg".
But, if I didnt get decent performance with the rotary converter feeding
the welder, I'd sure try re-connecting the welder's input and feed 240VAC
single phase to *one* of the input windings if each of the input windings
can be connected to 240 VAC (like in DELTA connection). Or some variation
on the theme of re-connecting the input windings and/or disconnecting taps
to the rectifier diodes.
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