Re: Watt meters

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

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

Both of you are saying that this device measures kWhrs
and not VAhrs. That's really all I wanted to know.

I got a pretty good feel for large facilities with BIG
inductive loads. I just wasn't sure whether a
residential meter measured actual watts or tried to
"calculate" watts from VA.

thanks
Adam

--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: John Keith
 > <jskeith-at-interaccess-dot-com>
 >
 > Hi folks,
 >
 >     Just to clarify a few points about watthour
 > meters:
 >
 > Demand and power factor are two separate issues.
 > Large industrial customers
 > are charged extra for reactive power since it
 > increases the cost of
 > generation and transmission, but residential
 > customers are not; they are
 > charged purely on the basis of actual watts. Large
 > users are also charged
 > extra for high demand of power during peak hours so
 > as to encourage use of
 > heavy loads during off-peak hours, but this is a
 > separate charge which also
 > does not apply to residential users, at least not
 > that I have ever seen
 >
 > Regards,
 > John Keith
 >
 >
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Tuesday, March 16, 2004 12:27 PM
 > Subject: RE: Watt meters
 >
 >
 >  > Original poster: "John H. Couture"
 > <couturejh-at-mgte-dot-com>
 >  >
 >  >
 >  > Adam -
 >  >
 >  > The electric energy meter on the side of your
 > house can also be called a
 >  > watthour meter. It measures  volts x amps x time
 > in kilowatt hours (KWHs).
 >  > You can calculate KW by dividing the watt hours
 > by the time. The electric
 >  > company would not know or assume an inductive
 > load for any customer. The
 >  > customer would not accept the electric company
 > charging him based on
 >  > assumptions. However, if you have a large
 > electric load they may want to
 >  > bill you additional charges for the reactive
 > (inductive) portion of your
 >  > load. This is normally in the form of a demand
 > meter. With this
 > information
 >  > you could calculate the power factor. For
 > residences the charge per KWH
 >  > includes an extra amount for the average
 > (assumed?) house inductive load.
 >  >
 >  > The electric utility bill can be a very complex
 > bill today because of the
 >  > many types of electric loads and the rising cost
 > of electricity. The
 > biggest
 >  > problems are harmonics and jumbled waveshapes
 > caused by electronic motor
 >  > controls and the millions of computers.
 >  >
 >  > John Couture
 >  >
 >  >
 >
---------------------------------SNIP------------------------------------
 >
 >


__________________________________
Do you Yahoo!?
Yahoo! Mail - More reliable, more storage, less spam
http://mail.yahoo-dot-com