Re: D5000 - B Luxtrol variac

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

Original poster: Yurtle Turtle <yurtle_t-at-yahoo-dot-com> 

Sounds kinda like these:

http://www.hot-streamer-dot-com/adam/garage/variac_120_volt_45.8_amp_1.jpg

http://www.hot-streamer-dot-com/adam/garage/variac_120_volt_45.8_amp_2.jpg

though mine say they are good for 5500 watts. Mine
came from an old theatre that was closing down and a
former list member salvaged them and offered them to
the list. I had to drive all day to get them, but they
were cheap. I haven't weighed them, but I think they
weigh less than the 1256's I got from you. They are
taper wound, so they can only be wired one way. They
also don't have any taps.

I used to use these guys back to back to feed my pig,
and they never even got warm, though my ballasting
MOTs sure did.

Adam



--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: DRIEBEN-at-midsouth.rr-dot-com
 >
 > 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 ;^))
 >
 >