RE: Power Load Balance Concern

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>

Hello Matt

Check out item # 1638787089 on ebay. This brand new 5 kva extreme isolation
transformer sold for $99. The seller stated that he has eight in stock. The
seller had a buy now price of about $150. Contact the seller through ebay
through the "ask seller a question". 

Godfrey Loudner

> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Sunday, September 23, 2001 1:52 PM
> To:	tesla-at-pupman-dot-com
> Subject:	Power Load Balance Concern
> 
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <Mddeming-at-aol-dot-com>
> 
> Hi All! 
>         I am in the process of upgrading my power supply to 4 15/60 NSTs
> and
> already have a 120v input -at-30Amp,  model W30M Variac. Based on nameplate
> ratings, the NST bank  should draw about 33 Amps total (4X8.25). The
> problem:
> since there is only one open slot left in my breaker box, I would like to
> use a
> 40Amp breaker, but I have not seen single breakers for this kind of
> current.
> Most are dual breakers -at- 240 V using both sides of the line to keep the
> load
> balanced and prevent in-house brown-outs.  If I try to get a 4KVA
> step-down/isolation transformer so as to utilize both sides of the line, I
> am
> looking at ~$350 plus S&H on 120 lbs. 
> Questions: 
> 1. Is running the Variac at +10% a real concern? 
> 2. Is placing this size load on one side of the panel going to create
> in-house
> imbalance problems? 
> 3. Anyone got a cheap step-down 4KVA transformer? 
> 
> Would appreciate response from any/all with experience in this area. 
> 
> Matt D. 
> G3-1185 
> 
> 
>