From:  Mark S Graalman [SMTP:wb8jkr-at-juno-dot-com]
Sent:  Sunday, January 25, 1998 7:22 AM
To:  tesla-at-pupman-dot-com
Subject:  Re: Shunts?


  The shunts don't limit primary current, they
limit secondary current by  bypassing some of
the lines of flux around the secondary winding,
in a sense its a lossy core, a core with a 
built in loss in regards to coupling power to the

Mark Graalman

On Sat, 24 Jan 1998 22:49:51 -0600 Tesla List <tesla-at-pupman-dot-com> writes:
>From:  Gregory R. Hunter [SMTP:ghunter-at-mail.enterprise-dot-net]
>Sent:  Saturday, January 24, 1998 12:37 PM
>To:  Tesla List
>Subject:  Shunts?
>Dear Readers,
>I have a question that's bugging me.  How do current limiting
>magnetic shunts work?  I don't have any reading material on power
>transformers, and I can't figure out how current limiting
>transformers work.
>I've been examining some old microwave oven transformers.  They are
>current limited, as I can clearly see the shunts.  The primary is
>bundled on the bottom, and the secondary is bundled on top.  The
>shunts are sandwiched in between.  They form a bridge between the
>center and outer legs of the core.  They look exactly like the core
>material.  I have a good grip on power transformer fundamentals, but
>I don't see how the shunts can clamp both primary and secondary
>current.  Any body have a clue?