Re: **Does anyone have CDE 942 series (or similar) capacitors? - MMC Voltage

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi Jonathon,

Many on the list will run their MMC's lower than sqrt2 and have 
gotten away with it for a long time. But, I'm with you here. I 
recommend to pull in the sqrt2 derating on "any" cap, even MMC's. 
It's nothing more than a safety factor, but with cap investment, why 
wouldn't you? Just seems silly not to.

Take care,
Bart

Tesla list wrote:

> Original poster: Kidd6488@xxxxxxx
> I didn't see anyone else point this out; excuse me if someone did.
> But 18kV MMC is not sufficient.  The capacitors should be rated 
> above the peak voltage of your NST which is
>
> SQRT(2) * NST voltage
>
> 1.414 * 15,000 = 21,210 volts.
>
> Unless I'm wrong, your MMC should be rated at at least 22kV.  Just 
> trying to help save your monet ;-)
>
> Jonathon
>
>
>
> In a message dated 8/3/05 10:32:26 AM Eastern Daylight Time, 
> tesla@xxxxxxxxxx writes:
> >I have a 15K/30mA NST which I am building an MMC for.
> >
> >capacitance of .00783mF (which is in my LTR range) and a voltage of 18,000v
> >(which exceeds my NST voltage)