Re: Cascading 4500 vac transformers

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Original poster: Jim Lux <jimlux-at-earthlink-dot-net> 

At 12:31 PM 4/16/2004 -0600, you wrote:
>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.