Re: Bleed resistors for MMC caps

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

Original poster: "claude masetto" <claudmas-at-optusnet-dot-com.au> 

I've always used normal 1M  1 watt resistors with no problems.

Claude.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, June 07, 2004 3:07 AM
Subject: RE: Bleed resistors for MMC caps


 > Original poster: "Tristan Steele" <ozonejunkie-at-westnet-dot-com.au>
 >
 > Hi There,
 >
 >
 > I know that here in Australia, RS Components sell HV Resistors for AU
 > 64c each.  I believe that they are a multinational company, and do exist
 > in the USA.  These resistors are rated to 3500VDC, more then the
 > 942C20P15K's.  It may be worthwhile looking into them, because 3
 > resistors per cap is messy, but all increases the chance of a failure.
 >
 > Try http://www.rs-components-dot-com/index.html.
 >
 >
 > Good Luck
 > Tristan
 >
 > -----Original Message-----
 > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > Sent: Saturday, June 05, 2004 10:30 AM
 > To: tesla-at-pupman-dot-com
 > Subject: Bleed resistors for MMC caps
 >
 > Original poster: Chris Cudahy <ccudahy-at-yahoo-dot-com>
 >
 >
 >    I'm collecting parts for an MMC cap. I've going with
 > 942C20P15K's for the caps but I'm not sure what to use
 > for bypass resistors. The 1/2 watt 10M ohm seems to be
 > reasonable but I can't find a resistor rated for 2000
 > volts - 350normal/700max is the most I can find.
 >    Which leaves me with 2 options:
 >
 > a) Wire up 3 3.3M Ohm resistors in series across each
 > cap. Hit just under the max overload voltage of 2100V
 > combined.
 >
 > b) Wire one 10M Ohm resistor,  (someone has mentioned
 > 10MH-ND) and wait for smoke.
 >
 >    I'd rather not have to wire 3 resistors to each cap,
 > has anyone had any failures with option b?
 >
 >    (BTW, what the heck is the point of making a 0.5 watt
 > resistor in 10M ohm if it's limited to 0.12 watts by
 > it's working voltage?)
 >
 > Chris
 >
 >
 >