Re: Balance resistors

To: tesla-at-pupman-dot-com
Subject: Re: Balance resistors
From: Richard Hull <hullr-at-whitlock-dot-com>
Date: Fri, 31 May 1996 11:41:32 -0700

Tesla List wrote:
> 
> >From i_hopley-at-wintermute.co.ukThu May 30 21:04:57 1996
> Date: Thu, 30 May 1996 20:49:43 +0100
> From: Ian Hopley <i_hopley-at-wintermute.co.uk>
> To: tesla-at-pupman-dot-com
> Subject: Balance resistors
> 
> Richard Hull wrote:-
> 
> > It is important
> >when series capacitors are hooked up to use about 50megs of resistance
> >across each cap to help divide the voltage equally.
> 
> I had been thinking about this one myself recently. It is almost standard
> practice in in H.V. supplys when placing two or more caps in series to
> increase the working voltage balancing resistors are placed in parallel
> across the caps to enshure an even voltage distribution across them all.
> They also act as bleed resistors to prevent the caps holding a high voltage
> after the power is removed.
> 
> What i was wondering was is it worth applying to my 15 section series cap.
> and what would the effect be on the 'Q' of the capacitor?
> 
> Would the 50megs still be a correct value on this cap?
> 
> *******************************************
> Ian Hopley ---->  i_hopley-at-wintermute.co.uk
> Aberdeen
> Scotland          Callsign  M M 1 A B A
> *******************************************


Ian,

Yes, the high resistance will be the best and keep from ruining the Q of 
the cap.  We have a number of .15uf 120KV radar pulse caps they have 12 
sections in them.  Each section is internally, under oil, shorted with a 
200 megohm resistor.

Richard Hull, TCBOR