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Re: Ganging Variacs (fwd)



---------- Forwarded message ----------
Date: Sun, 19 Aug 2007 15:01:39 -0400
From: timjroche@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: Ganging Variacs (fwd)


FRANK,

I don't think there would be a large Tesla coil if not for ganging variacs. or theatres or churches, or school auditoriums, or any large areas requiring lighting


-----Original Message-----
From: Tesla list <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Sun, 19 Aug 2007 10:14 am
Subject: Re: Ganging Variacs (fwd)





---------- Forwarded message ----------
Date: Sun, 19 Aug 2007 12:34:03 -0400
From: Edward Wingate <ewing7@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Ganging Variacs (fwd)

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Sat, 18 Aug 2007 15:46:25 -0700
>From: Frank <fxrays@xxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: Ganging Variacs (fwd)
>
>Couple of comments and questions.
>
>First, you cannot parallel Variacs, you would be driving one or the 
>other as they would not be identical.
>I have to assume ganging as used here would be a number of Variacs on 
>a single shaft and each one controlling a single phase of a multiphase system.
>
>  
>
Frank,

I have been paralleling Variacs and Powerstats for years with no 
problems. My current 100 amp Tesla coil control cabinet contains 4  280 
volt/25amp Variacs on a single shaft and uses NO paralleling chokes. The 
cabinet has been in use for over ten years and the Variacs are still 
perfectly happy. Intermittant use in Tesla coil service makes even 
paralleling chokes unnecessary if the Variacs or Powerstats are properly 
syncronized and TIGHTLY secured on the shaft and the output voltage 
difference in not more than one half to one volt. For 24/7 duty the 
chokes are a necessity.

Ed Wingate RATCB






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