Breaking News
Design How-To

Prevent tampering in energy meters

NO RATINGS
2 saves
Page 1 / 5 Next >
More Related Links
View Comments: Newest First | Oldest First | Threaded View
Energy Engineer
User Rank
Rookie
re: Prevent tampering in energy meters
Energy Engineer   5/20/2013 10:50:10 AM
NO RATINGS
Single phase meters are designed with either a additional battery or a CT to generate a potential across secondary side burden to power up electronic in the meter. Voltage is programmed and current is measured. Now the programmed value of voltage of PF is multiplied with current and time to compute energy.

cptechonline
User Rank
Rookie
re: Prevent tampering in energy meters
cptechonline   2/24/2009 2:20:51 AM
NO RATINGS
Nice to read this illustrative article. For missing neutral mentioned in fig:5 can you mention how the meter will get its power supply. In single ohase meters if any one meter potential is isolated then the meter is powered down and hence the CPU will not function. Can you comment on this. Thanks

Engineer62
User Rank
Rookie
re: Prevent tampering in energy meters
Engineer62   2/4/2009 8:14:25 PM
NO RATINGS
Interesting article, but I did not see much reference (any?) to power factor correction (pay only for watts, penalty for lagging VARs consumed, credit for leading VARs.) For my single-phase domestic (home) metering how is power factor allowed for, or are we just billed on VA, regardless? I have always wondered if I could get a discount on my electicity bill by adding a lot of shunt capacitance at my hydro entry to pull leading VARs (that's assuming I could find enough cheap/free AC capacitors!) Or would they charge me even more due to all those leading VARs and no PF recognition or correction?

Most Recent Comments
mhrackin
 
David Ashton
 
Snausage
 
Snausage
 
drsimm1776
 
eetcowie
 
mhrackin
 
Max The Magnificent
 
Max The Magnificent
August Cartoon Caption Winner!
August Cartoon Caption Winner!
"All the King's horses and all the KIng's men gave up on Humpty, so they handed the problem off to Engineering."
5 comments
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Flash Poll
Radio
NEXT UPCOMING BROADCAST
How to Cope with a Burpy Comet
October 17, 2pm EDT Friday
EE Times Editorial Director Karen Field interviews Andrea Accomazzo, Flight Director for the Rosetta Spacecraft.