Re: Energy saver circuit

On Tue, 20 Nov 2007 23:03:37 +0000 (UTC), don@xxxxxxxxxxxxxx (Don
Klipstein) wrote:

In article <4qm6k3lu7u6fd9baa5nefb8ppouo58f18g@xxxxxxx>, D from BC wrote:
On Tue, 20 Nov 2007 12:37:57 -0800 (PST), apogeusistemas@xxxxxxxxx
wrote:

Hi:
Can you tell me how create an energy saver like this:
http://www.electric-saver.com/

Thank you

I don't know too much about PF correction but I do know:

Stove: Doesn't need power factor correction.
Incandescent lights: Doesn't need PF correction.
Vacuum: Who cares..not on long enough
Computer: Already has PF correction.

Ballast for tube lights: ??
Let's say a ballast has a PF of 0.5.
So 200Watts billed to supply 100Watts.
(If I got that right..)

Does a 90% efficient converter doing power factor correction that
burns 10Watts to deliver 100watts to a ballast result in a power
reduction of 90 watts?

Electric meters only bill for "real" watts, so one does not pay for
extra amps due to poor power factor. Actually, one pays for watts lost in
wiring downstream of the electric meter, but correcting power factor is
unlikely to save more than a couple to occaisionally a few percent there.

Power factor is mainly of concern to commercial and industrial
customers, since power companies do not want to install or add capacity to
carry current that does not translate to billable watts.

Also, most fluorescent fixtures 32 watts or more already have high power
factor.

Fridge?

Power factor of most induction motors is said to be about .8.

- Don Klipstein (don@xxxxxxxxx)

Gee...so much for trying to defend a PF correction feature. :)
Now that gizmo just looks like a glorified surge suppressor.
I'll take a flying guess at under $5.00 in parts.. :P


D from BC
.

Relevant Pages

  • Re: Energy saver circuit
    ... Doesn't need power factor correction. ... Let's say a ballast has a PF of 0.5. ... reduction of 90 watts? ...
    (sci.electronics.design)
  • hp spec...was Re: Motorcycle Horsepower Question
    ... Net vs gross still refers to the output shaft of the _engine_, ... Surface Vehicle Standard ... Net Power Rating ... There are a bunch of other formulas for atmosphere correction, ...
    (rec.motorcycles)
  • Re: ABF power
    ... >> Without the above qualifying statements any power figure is totally ... The corrected figure has nothing whatsoever to do with engine or chassis dynos and obviously both cannot be compared. ... A chassis dyno is just as accurate and measures as ir says rear wheel Hp CORRECTED to a standard pressure and temperature if you want it to. ... Correction factors have absolutely nothing to do with the difference between the two types of dyno or measuring "flywheel" or engine power on a chassis dyno ...
    (uk.rec.cars.modifications)
  • Re: Power consumption on Standby
    ... If the measuring device doesn't apply power factor correction, 20 watts is a bit of an over read, I think? ...
    (uk.tech.digital-tv)
  • Re: Question relating to power factors and old welder
    ... The power factor on the unit will be horrific being mostly a reactive load ... could fit a cap across that tap to neutral. ... I could fit a cap across the 440 volt tap to neutral and still feed on ... Power factor correction at idle is OK because the ...
    (uk.rec.models.engineering)