Hi hmani.
I was busy with some other project and now got back to the power meter.
I resolved all the issures I had and now I am able to get readings of voltage and current.?
I have a relay testing device which can generate current from 0 to 100A. I connected current transformers to the relay tester and got the current value calibrated and tested with a variable current. And I did the same to the voltage with and tested with a variable voltage source. Everything seems ok with the relay testing device.
Then I connected to our office three phase line and connected a power meter parallel to compare with. The readings I get is not steady. Some times I get the same value in both power meters and sometimes the ADE7878 gives lower value than the power in the system.I checked current channel inputs with a oscilloscope.
I have attached the schematic and I have not used ferrite beads , do you think adding ferrite beads will solve the issue.
Thank You