Re: Seacor capacitor sucesses

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

Original poster: "Yurtle Turtle by way of Terry Fritz <twftesla-at-qwest-dot-net>" <yurtle_t-at-yahoo-dot-com>

I bought 100 of these way back, and have used then in
strings of 14. At 14 * 1600 = 22,400, I assumed this
was a conservative number. I used them at 15/30, 15/60
and 15/90 nst, and 14.4 5-6 kVA pig power. I used up
to seven strings. I never used them over 15 kV,
(21,213 peak) but I recently measured my MMC and
noticed a considerable reduction in capacitance. While
I never had a failure, (except for when my undersized
bleed resistor caught on fire), the reduction in
capacitance indicates there was significant
self-healing going on.

This is just one person's experience, but I'd consider
going a little more conservative than 14 per string.

http://www.hot-streamer-dot-com/adam/cap.htm

http://www.hot-streamer-dot-com/adam/disasters.htm

Adam

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Rothman, Aric by way of Terry
> Fritz <twftesla-at-qwest-dot-net>"
> <Aric.Rothman-at-Honeywell-dot-com>
> 
> About three years ago, I organized a group purchase
> of Seacor KP25
> capacitors.  I am curious to learn how these caps
> have been used (string lengths, number of strings)
> and which what types of
> power supplies (NST, MOT, Pigs, etc.)  These
> caps are foil-ended poly caps rated 0.047uF, 1600
> VDC, 4000 V/uS, with 27.5
> mm lead spacing.
> 
> I am contemplating construction of a MMC for an NST
> (15kV, 120mA) powered
> TC, favoring an LTR cap size of 0.03uF.  I'm
> planning string lengths of 14 Seacor caps, but from
> what I have read on
> this list, that might be too conservative.  I am
> seeking opinions on optimum string length.
> 
> Aric
> 
> 
> 


=====
Adam Minchey
yurtle_t-at-yahoo-dot-com
http://www.geocities-dot-com/yurtle_t/index.htm

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