31 Aug
2002
31 Aug
'02
5:11 p.m.
While I agree with the other answer that often there are several single phase supplies
inside, connected to separate phases, note that there are some commercial solutions if you
truly have one big power supply with a three phase primary on the transformer.
See http://www.phaseconverter.com/
and http://www.phase-a-matic.com/
for example.
These devices have a long life time and can be found on industrial surplus markets (which
of course are on the web too)