Re: Need help identifying a transformer

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

Original poster: "Bert Hickman by way of Terry Fritz <twftesla-at-uswest-dot-net>" <bert.hickman-at-aquila-dot-net>

Nice find! This sounds like a 2:1 step down (or step up) power transformer
with the windings rated for 240 and 120 volts respectively, and a 7.5 KVA, 
the implied current on the HV side would be 7500/240 = 31.25 amps, and 
62.6 amps on the LV side. Not a bad price for such a big chunk of iron and
copper but of limited utility for Tesla Coiling in its present form. 
However, if you could introduce a variable air gap into the magnetic
circuit, the LV side would make for an excellent high-current pig
ballast... 

-- Bert --
-- 
Bert Hickman
Stoneridge Engineering
Email:    bert.hickman-at-aquila-dot-net
Web Site: http://www.teslamania-dot-com


Tesla list wrote:
> 
> Original poster: "Kent Vander Velden by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <graphix-at-iastate.edu>
> 
>   While visiting the local university surplus warehouse today, I stumbled
> across a transformer that I could use some help identifying.  The input
> is marked as "120/240" and the output is 7.5kva.  Now, I feel a bit
> ignorant asking this, but what is the voltage and current rating then?
> 
>   The brute was quite heavy, but appeared to be entombed in that nasty
> emulsion stuff.  Only $25 though I do not want to lug it home unless I
> know what the thing is.
> 
>   Thanks.
> 
> ---
> Kent Vander Velden
> kent-at-iastate.edu