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Re: ~Is this safe to test
Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Esondrmn-at-aol-dot-com>
In a message dated 2/16/02 9:14:28 AM Pacific Standard Time, tesla-at-pupman-dot-com
The original plans for how to make rolled poly caps said to connect the cap
across a H.V. transformer and slowly, over hours, increase the voltage. I
think this was maybe to be an aide to getting the trapped air out of the cap.
I did not have a vacuum pump. As you might expect, this burned up a perfectly
good 12 kv, 60 ma transformer.
> I would NOT do this. Three problems:
> The cap size and the transformer size may be resonant. If the output
> inductance of the NST and the capacitor tune to the 60Hz line frequency, the
> voltage will sky rocket to like 80,000 volts! That will blow something up.
> This may saturate the current limiting shunts in the NST which can have the
> same effect as the above or cause damage due to very high current.
> There is nothing to limit the short circuit current from the capacitor. You
> would be charging the cap up to say 20,000 volts and then placing a dead
> on it. The current will be enormous in that case. It would sound like a
> machine gun.
> At 10:10 AM 2/16/2002 -0500, you wrote:
> > ....and how should I power it up....just plug it in?
> > I just want to test the cap and gap together......
> > Kinda cheesy graphics, but hey...it does the job! :)