Hi kostask
I suggested ADE78xx over ADE7758 earlier , because of the VRMS measurement bandwidth and also the different method of computing VRMS and reactive energy in ADE78xx.
So, for your application, do you expect the fundamental to be anywhere between 10Hz and 100Hz? What are the measurements that you are interested in?
I see that you have opened another post here: https://ez.analog.com/message/177874#177874
If that is regarding the same topic, I would recommend that you continue the discussion in only one of these two threads. Thank you!
Regards
hmani