Re: Pig question

• To: tesla-at-pupman-dot-com
• Subject: Re: Pig question
• From: Esondrmn-at-aol-dot-com
• Date: Sat, 15 Feb 1997 03:07:32 -0500 (EST)
• Subscriber: Esondrmn-at-aol-dot-com Sat Feb 15 15:44:36 1997

In a message dated 97-02-14 01:58:30 EST, you write:

<< 
 Hello fellow pigger's,
 
 I am working on the controller for my Pig. It is a 19.9KV 15 KW  unit.
 
 I read once that someone used 3- 2000W oven elements(8.33 ohms) in
 parallel for a resistance of 2.78 ohms.
 
 I have several air cooled power resistors ranging from 5kw to 30kw.
 I want as much flexability as possible.
 
 Could a few of you guys out there that use big pigs please tell me what
 resistances that you have needed to use at various times across your
 current control (welder)? And what power levels they would need to
 dissapate.
 
 Thankyou in advance,
  >>

Kevin,

That was probably me.  I was using three 2,000 watt elements in parallel and
in parallel with the welder.  This worked good until I rewired my primary now
I need to find another solution - more or less elements or maybe in series
with the welder instead.  When using three elements, running at about 30 amps
primary currrent, the elements get too hot to touch but not red hot.  Richard
Hull, I believe, uses resistors in series with the ballast, about 1/2 ohm.
 With this resistance at 30 amps, it would dissipate 450 watts so you would
need about a 1,000 watt rating.

Ed Sonderman

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