How do you calculate energy consumption using CTs(current transformers)?

We have three power lines coming into house. only two of them have power. If I put one current transformer on each of the power lines(not on the ground line), If the voltage coming into house if 208 volts and the current transformers are reading 3.1V and 2.8V respectively. how do we calculate total power consumption of the house in VA and and Watts?



Thanks for the answer in advance.How do you calculate energy consumption using CTs(current transformers)?Hello Friend,

As you said in house three power lines are coming. I think there are only two lines one for phase and other for neural or return path to current. It is the supply system for domestic. One more thing a current transformer always give current in the line not voltage.

Let voltage is 200 volt and current is 0.1 amp ( reading of current transformer ) and turn ratio of transformer is 10:1. Then current in phase wire will be 1 amp. And total power in kva will be 200*1=200watt. Now if power factor is 0.5 then kw=kva/0.5=400watt.

Regards,

Sunil Saharan