RE: PFC, Do you advocate them on 14440 1 amp transformers?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>

Thanks Gerry,

That's the first time I've heard the STR Scenario which is what I will be
running; but, are you sure you didn't state that backwards?

Jim

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Saturday, October 21, 2006 9:11 PM
To: tesla@xxxxxxxxxx
Subject: Re: PFC, Do you advocate them on 14440 1 amp transformers?

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Jim,

Your PFC should be across the power line (or variac output) with the
inductive ballast in series with the PIG LV input both located
downstream from the PFC.   Since the PFC has a "zero" impedance
voltage source across it (the line or variac output), its current
draw will only be seen by the source and will not affect things
downstream.  Since the run caps are rated for the line voltage you
are using, there is no need to worry about current rating for these
applications.

Capacitive PFC will only help if you are using a LTR value of Cp as
the reactance of the LTR value cap reflected to the primary will be
smaller than the reactance of the ballast inductance in series with
it, and hence the load presented to the line will still look
inductive.  If STR opearation is contemplated, the load to the line
will look capacitive and an inductive PFC will then be needed to
cancel this out if desired

Gerry R..

>Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>
>
>Hi again,
>
>I am considering buying 1000uf @ 370v Run Caps (100uf ganged) for PFC. I
not
>to worried about the current, I'll be using a Nema 5 contactor.
>
>Will this effect the performance of the coil. I seem to remember reading
>somewhere that they add a kick as well as increase efficiency. Does the
>power company see a difference? I also seem to remember that they don't see
>inductive loads well.
>
>My source for the transformer is Jack. We all hear from him from time to
>time . He has lots of HV toys. I will be using a 15kva sliding choke
>actuated by a surplus satellite actuator. Hey, I like the idea of a rocker
>switch to control current! I've already leaned my lesson about putting movs
>across switches and maybe to ground too.
>
>Jack if you are reading this , please respond with a comment about using a
>PFC bank associated with a slide choke, on the bombardier Transformer. The
>effect of the capacitance and the varying inductance is interesting.
>
>Comments?
>
>