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Re: Concerning a Potential Transformer.
to: Chis
The BIL stands for Basic Impulse Level and is a maximum short duration
withstand test which simulates a lightning strike to the transmission line.
The 15 kV rating is the max. possible short term operational potential the
transformer can withstand before breakdown begins to occur. You can
normally run a potential transformer at 3-4 kva if you keep the duty cycle
short which is standard for most TC work. Be sure to use series current
limiting with this xmfr --- do not run directly off the AC mains. Your .02
cap is a good match for this unit with current limiting.
DR.RESONANCE-at-next-wave-dot-net
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> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Concerning a Potential Transformer.
> Date: Friday, November 27, 1998 11:13 PM
>
> Original Poster: mel wise <mwise44-at-flash-dot-net>
>
> I recently bought a potential transformer that is rated a 7.2kv-at-1.2kva.
> The transformer has a thermal burden of 30 degrees celcius at 1.2kva.
> The name plate states that it has ratings of IC 15kv, BIL 110kv.
> What do those two numbers mean? I would also like to know if anyone
> knows how many watts I can safely get out of this transformer without
> risking its "life".
>
> So far I have tested it on my coil once. I limited the transformer to
> about 10-15 amps (I do not have an ammeter so I have to guess) using a
> microwave transformer with its secondary shorted. I would assume that
> the coil was running between 1.15-1.725kw. I was using a .02uf cap and a
> cylindrical static gap (which would get very hot). My maximum spark
> length was 30 inches to ground.
>
> Thanks for any input,
> Chris
>