Current Limiting Queries

From:  Gregory R. Hunter [SMTP:ghunter-at-mail.enterprise-dot-net]
Sent:  Wednesday, January 21, 1998 3:28 PM
To:  Tesla List
Subject:  Current Limiting Queries

Hello All,

I've read postings suggesting that an AC arc welder can be used 
as a current limiter for a pole transformer.  I'm curious about a 
couple of things.

How are the welder and pole pig wired together?

Also (and this is a bit off-subject), just how does an arc welder 
work?  What is the current limiting mechanism, and how is it made 

Lastly, can a pole pig be current limited by means other than an arc 
welder or series power resistors?