RE : modifying variac for inductance control of pole pig

• To: tesla-at-pupman-dot-com
• Subject: RE : modifying variac for inductance control of pole pig
• From: Robin Copini <rcopini-at-merlin-dot-net.au> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Wed, 26 May 1999 17:15:32 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Gidday All,


 Further along what seems like a very long road - up to cuurent control of pig.

 I have read various posts concerning both resistive and inductive control of
current to the pig - I have decided to use both in a parrallel switchable
setup for
the best of both worlds.

 Questions are  - I have read posts concerning the saturation of the coil form
(toroid) within variacs under load - my variac is a 240V 28amp air cooled unit
carbon brushed. - what can I expect this unit to do with my pig rated at
5KVA but
will be overdriven to  7-8KVA for some runs. If the core will saturate, will
'slicing' the coil form help? if so how wide do I make the cut, and do I put
anything in the gap?

Thanks in advance

Robin Copini,

Adelaide South Australia.

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