9 Oct
2007
9 Oct
'07
9:10 p.m.
Does your manual actually use the words "2 phase"?
220v is not 2 phase, although, I can't tell you exactly why. It's been
told to me, that each 110v hot wire of 220v(actually 120v and 240v in
the US) is really the same phase, but inverses of each other, or
something like that. Real 2PH, was used quite a bit in Pennsylvania,
but has been mostly phased out, if not entirely.
This came from various people who collect/restore/use old machinery,
many of whom are engineers.
This may or may not apply, if your outside the US.
Chad Fernandez
Michigan, USA
JP Hindin wrote:
Greetings all;
I'm reading up on the Onyx (rackmount, original Onyx) and the manual says
that units with three power supplies (OLS') are configured for three
phase, and units with two OLS' are configured for two phase.
While my machine does have the optional lower VME card cage and also the
second SCSI box (thus necessitating the 3 OLS'), I won't be likely to use
either of them. 220v I can do (handy-dandy nearby 40A circuit for a stove)
- 3 phase would require wiring changes in the building.
Is anyone aware if there was an established procedure to go from 3 phase
back to 3 phase on these units? Could I be lucky enough to have someone
here who has done it?
Thanks!
JP Hindin