Re: PowerwoRx E3... Save money and energy Go GREEN



Twice Retired wrote:

"The Daring Dufas" <the-daring-dufas@xxxxxxxxxxx> wrote in message news:gct0l9$180$1@xxxxxxxxxxx
Twice Retired wrote:

More junk for the gullible.

Power factor correction does work but nowadays
you slap a "GREEN" label on anything and you
can quadruple the price. Like low cholesterol
bottled water.

TDD

Low power factor is usually a result of a number of induction motors operating at the same time, as in an industrial setting. PF correction may be accomplished by synchronous motors or capacitor banks. Those industrial/commercial customers that may have PF issues are metered by the POCO with PF meters. Normally, a base is established and if the PF falls below the set point, additional charges are assessed by the POCO. Residential PF is normally in the 85+ range as most motors are small, usually a max of around 5 HP for AC and smaller for washer, dryer, dishwasher, fans, etc. Usually not running simultaneously anyway. POCO's do not monitor residential customers for power factor.
The vendors who tout these various "Magic Box" items for home use are providing nothing except a reduction in the purchaser's bank account.


Twenty years ago I worked for an electrical contracting
and service company when the company got into automatic
power factor correction for industrial customers. At the
same time the company started doing thermal video camera
surveys of commercial facilities. Guess what the thermal
images showed after power factor correction.

TDD
.



Relevant Pages

  • Re: PowerwoRx E3... Save money and energy Go GREEN
    ... Like low cholesterol ... Low power factor is usually a result of a number of induction motors operating at the same time, ... PF correction may be accomplished by synchronous motors or capacitor banks. ...
    (alt.home.repair)
  • 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: 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)
  • Re: Phase chopping.. bad?
    ... >>There is very similar to how factor correction is done is power ... > by an oversized capacitor that is connected through pwm cycles at varying ... power factor correction chips. ... design experience with off-line supplies other than having used ...
    (sci.electronics.design)

Loading