Re: PFC unbelievable!

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

Original poster: "Bert Hickman by way of Terry Fritz <twftesla-at-qwest-dot-net>" <bert.hickman-at-aquila-dot-net>

Rick,

A couple of comments:

1. The PFC cap's should be directly across the NST. This will eliminate the
4A reactive current at a zero setting on the variac.

2. You may find that under actual TC use, the amount of PFC correction may
be less because of the "reflected" loading from the MMC cap and spark gap
firings...

-- Bert --
-- 
Bert Hickman
Stoneridge Engineering
Email:    bert.hickman-at-aquila-dot-net
Web Site: http://www.teslamania-dot-com

Tesla list wrote:
> 
> Original poster: "Rick Williams by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <richardwwilliams-at-earthlink-dot-net>
> 
> Hi List,
> 
> Got some 12uF 240v run caps from
<http://www.usamfg-dot-net/>http://www.usamfg-dot-net/
> for 50 cents each. ( #71932 )
> 
> Found out 8 of them were optimum, 96uF for one 15/30 NST and a Staco 25amp
> variac.
> 
> Current was measured from the wall plug using an AC ammeter.
> NST output voltage was measured by a high voltage voltmeter (0-40kv).
> 
> With the variac set to maximum without the PFC current was 4.25 amps,
with PFC
> it dropped to 0.7 amps, 700ma !!!!
> 
> With the variac set to MINIMUM the current measured 4.20 amps with the PFC.
> Makes sense.
> 
> NST output current behaved the same with or without the PFC varying smoothly
> with the variac.
> 
> The schematic:
> 
> <http://potluck45.homestead-dot-com/files/PFCcaps01.jpg>http://potluck45.homest
> ead-dot-com/files/PFCcaps01.jpg
> 
> 
> 
> 
>