The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Microwave oven from 110V to 220V
References: <3DA42F7E.C83136F3@nf.sympatico.ca> <3DA43808.60C7A155@webaccess.net> <3DA46076.D91BDAB2@nf.sympatico.ca> <3DA46E05.65A0FFB5@webaccess.net> <3DA4F585.E2588855@nf.sympatico.ca> <3DA50799.CCB4C933@webaccess.net> <3DA57E42.EBEB0465@nf.sympatico.ca> <3DA58411.2BC5B497@webaccess.net> <email@example.com> <firstname.lastname@example.org> <email@example.com> <3DA6C5E3.F932667C@webaccess.net> <firstname.lastname@example.org> <3DA76CC2.EEDDB6E3@webaccess.net> <email@example.com> <3DA775A1.E28B988B@webaccess.net> <1034427794.568862@savina>
Date: Sat, 12 Oct 2002 13:15:45 GMT
NNTP-Posting-Date: Sat, 12 Oct 2002 06:15:45 PDT
Al Hephy wrote:
> Don't fight guys... Those 'power meters' actually measure current.
> During "brownouts" the power company screws you royally.
> Regards, Al
Well, chalk up another one who hasn't a clue about kilowatt hour meters
and how they work.
> Chuck Simmons wrote in message news:3DA775A1.E28B988B@webaccess.net...
> > Sam Goldwasser wrote:
> > >
> > > I guess I am missing your point because as far as I can tell, we agree on
> > > everything. All I am saying is that these power meters do not measure true
> > > power by some accident (violation of Murphy's law!), they were designed to
> > > work that way. It's very clever and as you say, economical. If a newly
> > > minted EE were asked to design a modern replacement, it would likely use
> > > voltage and current sensing, analog to digital conversion, a microprocessor
> > > to calculate power, and end up not being as accurate!
> > Very sorry. Several times in these groups I have seen statements to the
> > effect that kilowatt hour meters of traditional type do not indicate
> > true power but rather apparent power such as you would get with a
> > voltmeter and an ammeter. I incorrectly attributed this to you. You said
> > it right all along correcting some reference to a more rapidly spinning
> > meter or some such. I should read more carefully early in the morning.
> > And indeed the Ferraris type meter is very clever being an integrating
> > true power meter of very simple construction. One of its virtues in some
> > power systems is that it is reversible - that is, it "knows" which
> > direction power is going.
> > Chuck
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup