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Re: Maxwell capacitor question
Original poster: "colin.heath4" <colin.heath4-at-ntlworld-dot-com>
i used the 80nf 100kv version of what you have. it performed
well in my 6" coil at 400bps but got warm quickly so the inside must have
been very warm.
i assume this is due to the high break rate as like you say they are
designed for lower break rates.
i think they must be mica or mylar if they are so small at this voltage. i
dont think they could possibly be polythene or polypropylene.
i will be using this same cap in my maggie over the next couple of weeks at
this same break rate. so ill let you know how it goes.
----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
Sent: Thursday, October 09, 2003 1:13 AM
Subject: Maxwell capacitor question
> Original poster: Tesla729-at-cs-dot-com
> Hi all,
> I have recently located and purchased (2) cat # 31350 100 kV,
> 0.1 uFD Maxwell pulse caps (they're still enroute-haven't gotten
> here yet) and was trying, with no availe, to locate some specs
> on this particular capacitor. They are the single ended 2" x 6"
> x 15.75" long plastic oil-filled case. I figure they're probably rated
> for 1 pps at their rated voltage and probably 25 amps RMS and 25
> kAmps peak per discharge -at- < 20% V reversals. I believe all
> of the single ended 100kV rated Maxwells have to either be
> submerged in oil or in one atmosphere of dielectric gas to operate
> at the full rated 100 kV. Of course I will never be approaching
> this max voltage limit for coiling so running them in open air
> will be the way that I go.
> Anyway, I was planning on trying to use them in my remodeled
> 10 kVA pole pig coil. I figure they can be run at much higher bps when
> the voltage is kept well below the max kV rating. 14.4 kVAC rms
> would only reach about 20 kV peak (not considering resonant rise
> of course). I was planning on parallelling them for 0.2 uFD and
> maybe trying to go synch. They should handle 50 amps RMS in
> this configuration but would that really be sufficientfor a pig? Of
> course since they're used I don't know how many shots are left in
> them and I think they are only rated at either 30K or 100K shots, at
> the rated max voltage, at best. I have personally never had a Maxwell
> cap fail from too many shots, though I have blown up a few lossy
> polyester dielectric pulse caps (not Maxwells though) from over
> current (get too hot and finally explode ;^O) but I know they do have
> a limited "shot" life.
> As always, I value the advice from this list.....
> David Rieben