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> 

The 50A 3-phase is 50A each leg. Between a leg and neutral is 12kw with
240v. Using all 3 phases is 1.732 (sqrt 3) times this or close to 21kw. Even
the best nst's cores would saturate and and burn them up rather quickly if
anything above 20-25% nameplate rating is applied for any length of time.
Beyond that you just get more heat, not more voltage. The best setup with
3-phase in my opinion is using 3 transformers (or a 3-phase unit) and using
a 3-phase rectifier to make a dc resonant coil. Not as simple as a regular
single-phase one, but will milk the socket for all it's worth and does away
with the need for expensive giant variacs to control the power level.
Another option would be to use 3 transformers and 3 tank caps and have 3
rsg's on a common shaft 120 degrees apart from each other, but harder to
construct.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, January 02, 2004 10:56 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
 >
 >