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If you want to measure apparent power and real power for different loads, you need more CT's(current sensors) and more current sensing circuits.For example if you have 3 different loads like(a dishwasher, electrical saw and a washing machine) you will need for each one a different CT and a different current sensing circuit, your Arduino sketch should look pretty much like mine(i measure 3 currents and 3 different voltages for each of the 3 phase) with a slightly difference: You will have 3(or more) CT and probably only one voltage sensing circuit(i'm guessing all off your loads which you want to measure are 1 phase not 3 phase).I've put on my project a Nokia LCD to show me the results(you can't use serial monitor and LCD at the same time).Currently i'm at the office but if you give me your email i will gladly share my circuit infos and pictures of the project with you.
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