Re: Getting more input power

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "RIAA/MPAA's Worst Nightmare" <mike.marcum-at-zoomtown-dot-com> 

You mean it's that simple for single to 3-phase conversion? Sounds too good
to be true, with good-sized converters costing almost as much as having it
installed and with converters you lose 10-20%
of the juice before you even get to use it.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, January 03, 2004 11:49 AM
Subject: Re: Getting more input power


 > Original poster: "Richard Modistach" <hambone-at-dodo-dot-com.au>
 >
 > hi ian,
 >
 > the 50 amp 3 phase supply equals :-
 > 50 amps between each leg of any two phases at 415v,
 > 50 amps from any leg to neutral at 240v.
 > you will have a total of 150 amps at 240 volts at your disposal,
 > a correct pfc on one line should align any two phases correctly
 > if required,
 > in the case of running a 3 phase motor off single phase power
 > a pfc is used to misalign the phases correctly. however i think
 > from memory an inductance is used as well to achieve better
 > than 90 degree correction.
 > but by the looks the 50A off one leg at 240 v is going to meet your
 > requirements without phase combining and alignment.
 >
 > regards
 > richard
 > aus.
 >
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Saturday, January 03, 2004 2:26 PM
 > Subject: Getting more input power
 >
 >
 >  > Original poster: "Ian McLean" <ianmm-at-optusnet-dot-com.au>
 >  >
 >  > Hi all,
 >  >
 >  > I have been talking to my electrician about getting a 50A feed into my
 >  > workshop.
 >  > He has informed me that this is usually done with a 3-phase connection.
I
 >  > should have pressed him for some more questions, but forgot, so I'll
ask
 > the
 >  > knowledgeable people on this list.
 >  >
 >  > My knowledge of 3-phase power is sketchy, whilst I do understand the
 > basics.
 >  >
 >  > If the outlet is rated at 50A 3-ph, then how much power is available
per
 >  > phase (to neutral) ?
 >  >
 >  > If it is 1/3 of 50A that is OK, I could split the power - use one phase

 > for
 >  > the HV supply, and another for the RSG - but this raises a major issue.
 > The
 >  > RSG will be out of phase with the HV supply by 120 or 240 degrees
 > depending
 >  > on which two phases I use.  Is there any way of adjusting this with
some
 >  > sort of phase angle adjustment.  The JF phase adjuster can only manage
 > about
 >  > 90 degrees or so I believe.
 >  >
 >  > I wonder how my NST's would cope if I connected them between phases ?
 > This
 >  > way they would be getting 415VAC, not 240VAC - and I wonder if the
 >  > insulation in the tranformers could cope with the higher voltage.
Anyone
 >  > tried this ?  My guess is .. no way .. we would be upping a 15kV
 > tranformer
 >  > to nearly 30kV, and we all know this is about the dialectric strength
of
 >  > air, and the first real problem point for insulation breakdown and
corona.
 >  >
 >  > Rgs
 >  > Ian
 >  >
 >  >
 >  >
 >
 >
 >