Years ago I installed a TED-1000 (now obsolete) system from
<http://www.theenergydetective.com/>. Their software is terrible but
the system works. This system uses two current transformers and a
single voltage measurement system that all go inside your circuit
breaker box. I don't recall the sampling rate (1 KHz maybe). The
instantaneous voltage and current measurements are multiplied, summed,
and transmitted once per second. The data is transmitted to a receiver
using the house wiring (similar to X-10). People have hacked the system
to use their own receiver.
I haven't directly measured accuracy; monthly totals are usually about
5% low when compared to my electric bill. The software compensates for
missing readings. Resolution seems to be around 10 watts.
Brent
On 4/29/2014 11:25 AM, Pete Lancashire wrote:
Next spring I'm going be rewiring my house. And for 'fun' I want to drop a
couple current sensors on the input side of the main panel.
Being a beginner 'nut', I'm looking for more accuracy then needed.
Voltage, Frequency, waveform will be taken care of later, but accurate
current has be a bit flustered.
I've been reading up on CT's Iron core and Ferrite, and on Rogowski coils.
And the many new IC's on the market that take care of a lot of things.
Has someone done this before ? And if so any experiences to share ?
-pete
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