Re: D5000 - B Luxtrol variac

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

Original poster: DRIEBEN-at-midsouth.rr-dot-com 

Hi Ed,

You say that you are using a single Luxtrol to control your 5 kVA pig?
I'm assuming that yours, like mine is only rated for 120 volts with no
taps so there isn't even the 140 volt option with 120 volts in. As your
pig requires 240 volts, I assume you're using the variac to control the
input voltage to the 120 to 240 volt range, unless you're using only
half of the LV winding of the pig and feeding it 120 volts for the full
14,400 volt ouput on the HV side.?

David Rieben


----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
Date: Thursday, March 25, 2004 7:13 pm
Subject: Re: D5000 - B Luxtrol variac

 > Original poster: Esondrmn-at-aol-dot-com
 >
 > In a message dated 3/24/04 10:03:39 PM Pacific Standard Time,
 > tesla-at-pupman-dot-com writes:
 >
 >
 > >Hi all,
 > >
 > >Got a little question on a beauty that I just got on ebay.
 > Externally,>it looks just like a 1256D powerstat and has the
 > Powerstat name on the
 > >frame support members just like a 1256. However, it is rated at 5000
 > >watts or 120 volts at exactly 41.6 amps, that is for an incandescent
 > >lamp load, and is rated to handle (135) 40 watt flourescent lamps
 > with>certain types of ballasts. This things weighs 72 lbs. on the
 > scale>which seems to dictate a considerable higher rating than 5
 > kW or 5 kVA.
 > >O yea, that's right, kVA and kW are not necessarily
 > interchangable un-
 > >less the power factor is corrected to right at 100%. Yet with a
 > resistive>load like incandescent lamps, the power factor should be
 > right at 100%,
 > >shouldn't it? Of course, flourescent lamps with their
 > accompanying bal-
 > >lasts would introduce an inductive load  where the power factor would
 > >be noticably less than 100%. 135 x 40 = 5400 which is a bit more than
 > >5000. Could someone please shed a little bit of light on this matter
 > >for me?
 > >
 > >David
 > >
 > >PS - I got a great deal on this variac too with a grand total of
 > under>$75 in it, including shipping ;^))
 >
 >
 > David,
 >
 > Good buy.  I have one exactly like it.  I use it for ballasting my
 > 14.4 kv
 > 5 kva distribution transformer.
 >
 > Ed Sonderman
 >
 >
 >