Submitted by Eric Sandeen (not verified) on Sun, 02/28/2010 - 17:21.
Hi again Trystan -
I managed to get a simple non-invasive whole-house monitor going, but it's very rough still. (The IR pulse detector doesn't work in the sunlight) :) But on the upside it was simple, and cost almost nothing for parts aside from the Arduino. And it should be very accurate since the meter is doing all the hard work for me.
As I said, I've been gearing up to do a CT monitor setup like yours, but I realized a couple things... in the US we have 2-phase power, so of course we'd need 2 CTs on the mains. But I'm wondering if, for voltage & power measurement, we would need to measure across both phases to be accurate.
Further, I wonder how much the voltage differs on different branch circuits, and whether a single point of voltage measurement is sufficient for computing power on each of the branch circuits...
I guess I have more reading/studying/researching to do. :)
Hi again Trystan - I managed
Hi again Trystan -
I managed to get a simple non-invasive whole-house monitor going, but it's very rough still. (The IR pulse detector doesn't work in the sunlight) :) But on the upside it was simple, and cost almost nothing for parts aside from the Arduino. And it should be very accurate since the meter is doing all the hard work for me.
As I said, I've been gearing up to do a CT monitor setup like yours, but I realized a couple things... in the US we have 2-phase power, so of course we'd need 2 CTs on the mains. But I'm wondering if, for voltage & power measurement, we would need to measure across both phases to be accurate.
Further, I wonder how much the voltage differs on different branch circuits, and whether a single point of voltage measurement is sufficient for computing power on each of the branch circuits...
I guess I have more reading/studying/researching to do. :)