Re: [TCML] Variac proximity

["DC Cox" <resonance@xxxxxxxxxxxx>]

As long as the variac is in a shielded, grounded case, no problems should
occur.

If not, ie, an open variac, place a vertical metal shield between the two,
ground both variacs, and ground the shield.  This should shroud any magnetic
field from interacting with the smaller variac.

Dr. Resonance




On Thu, May 15, 2008 at 6:23 PM, Lau, Gary <Gary.Lau@xxxxxx> wrote:

> I believe that power transformers (with the notable exception of Tesla
> Coils!) are designed to as thoroughly as possible, contain the magnetic
> fields, lest they couple to unintended things resulting in losses.  Toroidal
> transformers are particularly good at containing their magnetic fields.  So,
> you can place anything as close as you like to your Variacs without fear of
> electrical interaction.
>
> Regards, Gary Lau
> MA, USA
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of Phillip Strauss
> > Sent: Thursday, May 15, 2008 6:21 PM
> > To: tesla@xxxxxxxxxx
> > Subject: [TCML] Variac proximity
> >
> > Hi all,
> > I'm constructing a compact control cabinet for a large SRSG coil up to 10
> Kw.  The
> > cabinet would contain two variacs, a main 25 nominal amp unit and within
> two or
> > three inches of it a smaller unit to phase the SRSG (John Freau's
> system). Is there
> > any likelihood of negative interaction due to the proximity of the two
> variacs.
> > Any suggestions gratefully received,
> > Regards,
> > Phillip.
> >
> >
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