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Re: [Fwd: High power Variacs]
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To: "'Tesla List'" <tesla@pupman.com>
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Subject: Re: [Fwd: High power Variacs]
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From: Tesla List <tesla@stic.net>
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Date: Fri, 2 Jan 1998 18:44:52 -0600
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Approved: tesla@stic.net
From: Mike Harrison[SMTP:wwl@netcomuk.co.uk]
Reply To: wwl@netcomuk.co.uk
Sent: Friday, January 02, 1998 4:10 AM
To: Tesla List
Subject: Re: [Fwd: High power Variacs]
On Thu, 1 Jan 1998 12:00:11 -0600, you wrote:
>
>----------
>From: Steve Rodway[SMTP:Legion@bigfoot.com]
>Sent: Wednesday, December 31, 1997 7:53 AM
>To: Tesla@pupman.com
>Subject: [Fwd: High power Variacs]
>
> I've got a 16Kw pole pig, and I'm looking for a variac to control it at full
>power (64A, 240V) anyone got any ideas where I could get one? (In the UK).
> Thanks
> Steve Rodway
If money isn't problem, a company called Service Trading in Chiswick
(0181 995 1560) do a 10KVA (45A) variac for #300 - you could gang a
couple of these in parallel, on a common shaft or with bike sprocket
wheels/chain.
Another possibility might be to wind a tapped autotransformer, so you
adjust power by tap changing. Maybe you could cannibalise a big welder
- remove the secondary and add taps to the primary.
Another possibility might be to use a quantity of low-voltage mains
transformers, say, 12v battery starter/charger transformers with
primaries in parallel and secondaries in series, providing several
taps.
I doubt any solution will be cheap, as the metal alone in any
'surplus' solution will have a significant scrap value!
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