Pole transformers wired for Three Phase (fwd)

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---------- Forwarded message ----------
Date: Tue, 7 Aug 2007 00:34:23 -0700
From: Jim Mora <jmora@xxxxxxxxxxx>
To: 'Tesla list' <tesla@xxxxxxxxxx>
Subject: Pole transformers wired for Three Phase

Hello All,

 

I have seen several posts recently and in the past regarding conceptually
how single pigs are wired while specified for single and three phase. I'm
curious how three pigs would best be wire for 3 phase step up and what the
ratings of the pigs should be. Reversing what the utilities do around here
in California (three wire HV poly phase), it would seem the low voltage
would be wired in a wye configuration and the high voltage should be delta
connected? 

 

If that is the case, than should the transformers necessarily be dual horned
and what is the appropriate transformer rating in reverse? I ask as I am now
working in a facility that has three phase in most of the buildings and have
a green light to pursue my Tesla coil experimentation. I have a 3P radar
transformer with 24KV DC out but it is not as robust as 3 pigs !!!

 

On Richie Burnett's site he speaks of 3 phase discrete transformers using
half and full "pulse" rectification but does not speak to the transformer
ratings. http://www.richieburnett.co.uk/dcresist.html

In this case the transformers are wired Wye to Wye which would allow me to
use three of Dr. Resonance's transformers (the cases and one horn tied to
ground in all three transformers). Here we have the (sqr)3 * (sqr)2 * RMS of
a single transformer or 35Kv given 14400v transformers, yes? The
disadvantage of the wye to wye is the PS +/- must float, isn't that so?

 

So, I'm curious what would be the most desirable transformer configuration
and voltage rating to get three phase six pulse quasi DC sans filter cap!

 

Thanks,

Jim Mora