Re: Repost: NST VA Rating and Power Factor

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

But, on the other hand, you've got the huge leakage inductance of the NST,
which I think will dominate over the primary cap.  However, for a HPF NST,
there might not be much to be gained by adding PFCs.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, May 20, 2001 4:12 PM
Subject: Re: Repost: NST VA Rating and Power Factor


> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<evp-at-pacbell-dot-net>
>
> > I have two NSTs, both 12kv at 60ma, high power factor (rated 400va).  It
is
> > my understanding that the HPF NSTs have a built in capacitor to correct
the
> > current lag due to the inductive load.  Adding the PFC cap reduces the
input
> > current without reducing the output.  See also Terry's posts on PFC
caps.
>
> Note that the NST power factor correction is for use with a RESISTIVE
> load on the secondary.  When you connect an NST to a TC primary you have
> a capacitive load to start with, and the PFC on the line may or not
> lower the line input current to the PFC/NST in parallel.  It's not
> obvious to me that PFC's make sense in that case.
>
> Ed
>
>
>