Re: Three phase transformer
Hi Folks, I've come to this one a little late.
There is no simple way to run a 3 phase transformer from single phase.
The transformers you have look as if they have been used for a low (ish) ripple DC supply that did not use smoothing caps . It is a 3 phase (6 diodes) full wave bridge. Not liked these days due to the poor power factor (current distortion) reflected back on to the mains supply
It would be possible to run these transformers in the manner of simple phase converters with a capacitor feeding the 3rd phase. I'm guessing it would need to be about 20uf and will be very dependent on the current drawn (so could be OK after some experimentation for a fixed current load).
It would be best if you disconnect the 3 secondaries and wired then in series and or parallel BUT TAKING GREAT CARE OF THE PHASING. This may get you somewhere towards what you want (easier if you just wanted DC).
2 windings that are not in phase can be connected in series and will give less that twice the voltage out (assuming equal winding) by an amount depending on the phase displacement (this is used on 3 to 18 phase transformers).
Not efficient, but as you say you have plenty of time to play.
Have fun and don't blow too many fuses,
Ed
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