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Re: 60A Variac on Ebay

Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

Skip, all,

I have a Staco triple variac assembly that looks exactly
like that one. The only difference is the nomenclature tag
on mine states that it's a model # 5020CT-3Y, it's a 3-
phase unit rated at 480 volts input, 27.2 kVA, 28 amps,
and 0 - 560 volts output. It looks like the 480 volt rating
is based on a 3-phase delta hookup and after rewiring the
3 units as paralleled in a single phase setup, they work
on 240 volts input with 0-280 output (480 volts delta
phase/phase is 277 volt phase/ground - 480/sqrt3).
However, I have had one problem when powering up
these 3 paralleled variacs as a single phase, 84 amp
triple stack - It has a TERRIBLE inrush current problem
that will trip the 125 amp mains breaker about 8 out of 10
times on initial power up. It's so bad that I initially thought
that there was a dead short! I suppose the only way that I
could use it would be to place the ballast unit between
the wall plug and the variac instead of the standard setup
with the ballast between the variac and the transformer.?

David Rieben


----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, November 11, 2005 10:05 PM
Subject: 60A Variac on Ebay


Original poster: Skip Malley <skip@xxxxxxxxxxxxxxx>

I just found a Variac on Ebay someone might be interested in.

The unit states 240 VAC, 3 Phase Input with 0-280 VAC @ 60 Amp output.

Here is the link:
http://cgi.ebay.com/Staco-Transformer-Variable-Variac-6010CT-34_W0QQitemZ7561203876QQcategoryZ1504QQrdZ1QQcmdZViewItem

It looks like three 240V variacs on a common shaft. Someone could probably buy it, remove two sections and sell the other two.

This might be good for some of you guys running the pole pigs.

Happy coiling.
Skip