RE: PFC for pigs

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

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


Greg -

Click on
   http://www.miramar.sdccd.cc.ca.us/faculty/jcouture/tesla/index.asp?ID=5

This will help you find the PFC you need. Pole pigs usually do not use PFC
because of the low percent impedance of the transformer. However, you will
find you can get a little benefit depending on the load.

John Couture

-------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, December 03, 2002 9:35 PM
To: tesla-at-pupman-dot-com
Subject: PFC for pigs


Original poster: "Gregory Peters by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<s371034-at-student.uq.edu.au>

Hello list,

I realise PFC for pole pigs is not necessarily practical for two
reasons:

1. Huge capacitance needed

2. Variable ballasting means no set value can be used.

However, I assume SOME PFC is better than NONE, and I have just been
offered HEAPS of big motor run caps at a good price. Also, once my
coil is going properly, the ballast is not altered. So two questions:

1. How does one figure out an approximate value of capacitance needed?

2. Should the PFC go before the variac and ballast, or before the pig?

I ask this question because I want to extract the most possible from
my measly 32A, 240v supply (The largest single phase residential
supply you can get in Australia, before going to 3 phase). Jeez I
wish I lived in the US! I'm one day going to wind a 415v to 240v
transformer and use two phases of my 32A 3 phase supply, but that's
in the future :)


Cheers,

Greg.