Re: Freau's efficiency theory=Success!?

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 6/8/01 9:53:51 PM Eastern Daylight Time, tesla-at-pupman-dot-com 
writes:

I should have mentioned too that the good electronic wattmeters are
not fooled at all, but the old electrodynamometer types can be
fooled by harmonics of the 60Hz.  I have an electrodynamometer
type, a Weston Model 301, (or 310, i always forget the number).

John Freau

> 
>  Alexaner,
>  
>  I do not think that wattmeters need to have
>  the current and voltage in phase to read the true watts.  This
>  is what makes them a wattmeter.... they measure the real
>  power rather than the apparent power.  For this reason they
>  are well suited for inductive and capacitive loads. It is true that they
>  can be fooled under some conditions however not by an out-of-
>  phase condition.  If you multiply the reading of an ammeter
>  and a voltmeter you'll get the apparent power or VA assuming
>  the power factor is less than unity.  If the power factor is
>  unity, then the wattage and VA will be the same.  There may
>  be some cheapo "wattmeters" out there that are not true
>  wattmeter perhaps.  
>  
>  John Freau
>