Thanks very much Bert. I figured it was too good to be true.
Tim
On Fri, May 19, 2017 at 12:48 PM, Bert Hickman <bert@xxxxxxxxxxxxxxxxxxxxx>
wrote:
> Hi Tim,
>
> These are modern stainless steel cased PFC capacitors with extended foil
> polypropylene film construction and biodegradable Edisol VI dielectric
> fluid. These would have the right kind of dielectric system for
> re-purposing for a large TC... but the capacitance of this particular model
> (7.68 uF) is much too high for your spark gap TC.
>
> Even connecting all three caps in series will not get you into the
> appropriate capacitance range for a 14.4 kV PT-driven system (0.01 - 0.02
> uF). Because of the lower power level available with a PT-powered system
> (versus a distribution transformer-powered system), it may not be possible
> to find a set of PFC caps that will have low enough capacitance to work
> with your setup, unless you tear them apart and reconfigure the capacitor
> rolls... :(
>
> The trick will be finding PFC's with the LOWEST KVAR rating and the
> HIGHEST operating voltage. Newer capacitors tend to pack more capacitance
> in a smaller package, making the search more difficult with newer PFC caps.
> The caps you're looking for will typically be found as spares for
> substation banks or in higher-voltage (14.4 - 35 kV) distribution systems.
>
> Bert
>
> Tim Flood wrote:
>
>> Just so happens I found three such caps in our bone yard here at the
>> company.
>>
>> They are: McGraw Edison PN CEP00132A006, 7200 Volts, 150 KVAR, 95 KV BIL.
>> Form 2, Type ES.
>>
>> I have been looking for caps for a 1440 V potential transformer. How would
>> one of these work?
>>
>> Thank you.
>>
>> Tim
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>>
>>
>>
>
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