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Re: switching a polemount transformer
Original poster: "Crow Leader by way of Terry Fritz <twftesla-at-qwest-dot-net>" <presence-at-churchofinformationwarfare-dot-org>
So it seems some large mechanical switch or contactor will do. I've assumed
the back EMF of a giant transformer would inst-destroy the "slowest" contact
of say a paralleled 3 pole 20A generic contactor. I'll find one and see what
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
Sent: Friday, August 31, 2001 10:25 PM
Subject: Re: switching a polemount transformer
> Original poster: "Barton B. Anderson by way of Terry Fritz
> Hi Ken,
> I use a variac to increase the voltage from zero up as well as a variac
> a current ballast. This elliminates the
> need to switch the pig on at full voltage.
> Tesla list wrote:
> > Original poster: "Crow Leader by way of Terry Fritz
> > Greetings from Chicago.
> > What do some of you use to switch on an off a 10kVA polemount
> > I browsed some catalogs and it seems a two pole 100A contactor is
> > like $400 and up (I"m not seeing any "value" there either). What about
> > stud SCRs or electrical disconnect boxes with the fun handle? Has anbody
> > problem with the inrush current?
> > KEN