Re: Cascading 4500 vac transformers

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

Original poster: "Eastern Voltage Research Corporation" <dhmccauley-at-easternvoltageresearch-dot-com> 

 > >Original poster: "Virtualgod" <mike.marcum-at-zoomtown-dot-com>
 > >I ran across these 1800 VA 115v-4500,660v transformers from C & H sales
 > >and was thinking of cascading a few. Would there be a practical limit
 > >voltage wise? Would corona start eating the outer transformers farthest
 > >from the midpoint ground (at say +/- 100kv, just picking numbers out of
 > >the air)? These look alot more powerful than the nst's being sold on ebay
 > >for the same price.
 >
 > 100kV will certainly need to be run under oil or in pressurized gas.
 >
 > Also, if you want +/- 100kV, that implies buying some 40 or 50 of those
 > transformers for each leg (I'm sure C&H will give you a better price, but
 > not that much better).  At $40 each, that's $4000 of transformers. It
would
 > also be pretty large.  Figure each transformer is about a 8x8x8 inch cube,
 > by the time you mount it, etc. 50 of them would be quite a large pile.
 >
 > I'll bet you could find a surplus 100kV transformer for less and it would
 > weigh less too.  Think Xray transformers.


Mike already has a 90kV/270mA X-Ray transformer that he has successfully
used for a tesla coil already.
Thats a 24.3kVA transformer.  Not sure why he would want to buy some surplus
low-voltage transformers
and make a series connect high voltage transformer when he already has that
beauty.

Dan