Re: Cap question

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

Original poster: "Daniel McCauley by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>


Another rule of thumb.  You should always derate your capacitor by at least
50% in tesla coil applications.
For example you have a 10kVAC application, you should get a cap thats rated
for about 20kVAC.



> Here's the rule for converting max DC to AC. Just
> multiply the max allowable DC by 0.707 and that will
> equal max allowable AC. For example, 20,000VDC x 0.707
> = 14,140VAC. However, it's unwise to push a cap of
> unknown quality to its maximum, especially in TC
> service. I wouldn't push these caps above 12KVAC if
> they were mine. They may have a safety margin
> engineered in, but who knows?
>
> Regards,
>
> Greg
> http://hot-streamer-dot-com/greg
>
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster:
> > "=?Windows-1252?Q?Hans_J=F8rgen_Grimstad?= by way of
> > Terry Fritz <twftesla-at-qwest-dot-net>"
> > <hansj.grimstad-at-consultit.no>
> >
> > Hi !
> >
> > I recently purchased some .02 MF/20KVDC rated caps
> > for use in my coil.
> > I've tried a couple of them and they seem to perform
> > well. I've only
> > tested the setup for very short runs, since I'm a
> > bit concerned about
> > how high AC voltage they can handle.
> >
> > There's no manufacturer info on the caps. They're
> > labeled F-C-1.
> > D6-200-20, 69-18, 5910-9410310 (ceramic body, 12 cm
> > long, 4 cm
> > diameter). Does anyone have any experience with
> > these caps in a TC ?
> > What's the max AC voltage I can apply without
> > worriying about seriously
> > reducing the lifespan of these caps ?
> >
> > Regards
> > Hans J. Grimstad
> >
> >
> >
>
>
>
>
>