"dualizing" Variacs

To: tesla-at-pupman-dot-com
Subject: "dualizing" Variacs
From: "Bunnykiller" <bigfoo39-at-telocity-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Mon, 27 Mar 2000 20:26:18 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hi all...


heres the situation ...  240 volts input to     2 -at-  240V 28A variacs
...  I wired them in this manner..  one leg to one variac ( post #2
variac #1) , the other leg to the other variac ( post #2 variac #2) , 
neutral to both variacs ( post 1 of both), V out = ( from wiper #3 post
#1 variac ) = 120V  ( from wiper #3 post #2 variac) =120.2v 

measured across both wipers for a reading of 240.2V ( at the 120 V dial
setting) 
ok so far so good ...

max voltage difference between the 2 legs ( #3 lug ) is an amazingly low
.56 volts at max output ( 140 V each variac ) well sorta  Variac #1 =
140.44  variac #2 = 140   for a total of 280.4 V 

heres the question...   does this create a "variac" that is capable of
280V out -at- 56 amps capacity ? ( since each leg variac wise can handle 28
amps) 

and since the voltages are so close do i still need a paralleling choke?



i gotta quit thinking...  it creates more questions than the original
one i had


Scot D