Re: PFCs

• To: tesla-at-pupman-dot-com
• Subject: Re: PFCs
• From: Bert Hickman <bert.hickman-at-aquila-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Fri, 22 Oct 1999 16:28:45 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Grayson,

No. Internally, motor "start" capacitors are back-to-back electrolytic
capacitors. They will rapidly overheat (and possible vent steam) when
used as PFC's. You need "motor run" capacitors. These are typically made
with a polyester film/oil dielectric system that can run across the AC
mains indefinately. 

-- Bert --

Tesla List wrote:
> 
> Original Poster: Grayson B Dietrich <electrofire-at-juno-dot-com>
> 
> Hello All,
> 
> I was wondering,
> 
> Would a bank of paralleled motor-start caps be suitable as a power factor
> correction cap? I I calculated, if memory serves, something like 80uF or
> 90uF for my 12kV 60mA NST. When powering my TC, it blows a 10 amp fuse no
> problem...   ...and I really wish it wouldn't. Since then I could safely
> fuse my variac with the fuse holder built into it.
> 
> Grayson Dietrich
> http://www.electrophile.8m-dot-com
> 
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