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Re: Maxwell

Original poster: Edward Wingate <ewing7@xxxxxxxxxxxxxxxx>

Tesla list wrote: 
Original poster: "Sean Taylor" <mailto:sstaylor@xxxxxxxx><sstaylor@xxxxxxxx>

Rich,

As far as I know, all the 31xxx caps were rated at 1 PPS.  Now, there are
several ratings to consider, the first being voltage.  If you are
seriously underrating the voltage (like a 12 kV NST on that cap) you
shouldn't have too much of a problem running it at 120 bps, say.  Just be
careful of heating, and don't make your primary too small (lower
inductance and higher peak current).

FWIW, I got some Maxwell spec sheets a while back from someone on the
TCML, and I've put them on my webserver: <http://64.198.215.215/maxwell/>http://64.198.215.215/maxwell/
NOW, I'd appreciate it if everyone didn't just go download those for the
heck of it, 'cause I have a limited BW - 600 MB daily. Thanks!

Sean Taylor
Urbana, IL

Sean,

Not true. Both the 31393/.06 mfd @ 40 kv and 31976/.075 mfd @ 40 kv are rated at a continuous rep rate of 100 pps. Keep in mind that's CONTINOUS rep rate with no stated time limit. The most important factor is not to exceed the 25 amp RMS current rating as is stated in the following answer from an engineer at General Atomics/Maxwell to an inquiry from Phil Labudde about the 31976. The answer Phil got was similar to a response I got from an inquiry to Maxwell about the 31393.

"Phil,

Andy Bushnell passed your inquiry along to me.

The original ratings for PN 31976 are given in the attached PDF file. We have not built this capacitor for at least 6 years. It was originally designed in 1987.

The maximum rep rate is stated as 100 Hz. In reality, the RMS current is the limiting factor, and should be kept at 25 Amps or less. The rep rate can be higher than 100 Hz as long as the RMS current rating is not exceeded.

I hope this helps.

Joel"

Ed Wingate RATCB