Re: Toploads that bite

• To: tesla-at-pupman-dot-com
• Subject: Re: Toploads that bite
• From: "Megavolt Nick" <tesla-at-fieldfamily.prontoserve.co.uk> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Wed, 16 Feb 2000 06:55:56 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hi Herwig,
                comments below
>  > > > I personally advocate discharge resistors (note I said
> 'discharge' not equalising') across all the caps
> > > - Every single cap of the MMC has got its 10 MOhm bleeder of
> > > course. 10 MOhm is much to high to act as an equalizing resistor.
> > I didn't mean across each cap of the mmc, I meant across all standalone
> > capacitors - In the mmc case that would mean across the whole lot.
> - Using only one bleeding resistor per string or per MMC doesn't
> guarantee that all of the caps are discharged in case of blown
> capacitors. Therefore it's much safer to use a bleeder resistor
> across each single cap.
A single R will guarantee the voltage between the busbars is zero what ever
the fault condition, and as I can't touch my mmc at all i don't see why I
should bother to solder on 900 more resistors if it provides no safety or
performance benefit.

Regards
Nick Field

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