Re: One of the biggest MMCs ever?? - Questions

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

Original poster: "Bill Vanyo by way of Terry Fritz <twftesla-at-qwest-dot-net>" <vanyo-at-echoes-dot-net>

I arranged mine end-to-end for one reason:  The lead wires on my bleeder
resistors were too short to reach from one end of the cap to the other,
and I didn't want to bother soldering in short little pieces of wire. 
Putting the caps end to end, I could twist their leads together, and
have enough left over on the other side of the mounting board (Grade
G-10/Fr4, Garolite Sheet from McMaster-Carr) to bend back and attach the
bleeder resistors.

	- Bill Vanyo

Tesla list wrote:
> 
> Original poster: "Gregory Peters by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>
> 
> Hello all,
> 
> My shipment of 145 Cornell Dubilier Caps arrived from Richardson
> Electronics today. These are 2000VDC, 0.15uF caps, identical to the
> Geek Group caps. I intend to use twelve strings, with twelve caps per
> string, for 0.15uF at 24kVDC. This will be used with my 11.5kV 10kW
> pole pig system, with a 400/200/100 BPS sync gap (variable). This MMC
> will be huge, with 144 caps in total - second only to Robin Copini's
> (as far as I know). Due to the sheer number of caps, I want to
> package them as efficiently as possible to conserve space. I was
> wondering if anyone has had any problems with mounting them side by
> side (as opposed to end to end). I am considering mounting them side
> by side with a 5mm gap between. This will let me fit 4 strings of 12
> on a single poly cutting board. Three boards will be placed in
> parallel for 0.15uF. Can anyone see any problem with this
> configuration? I figure with 2kV across each cap, and a 5mm gap
> between each, I should have no problems with arc overs. What do you
> think? In addition, is this beast over engineered enough to be
> reliable, or should I go for 13 caps per string?
> 
> Cheers,
> 
> Greg Peters.