Hi all,
First let me give a brief introduction to the circuitry.
The ade7758 evaluation board can take 22mA current.
But Energy meter manufacturers usually specify their buden as 1A or 5A.
So if we do that, then we have to incorporate an internal CT.
The internal CT will have
Primary current : 0 to 1A.....(or 5A)
secondary current : 0 to 22mA.
Can a get a CT like this??.
Other option is to use a 200:1 CT internally, then
If we specify the burden of our meter as 5A, then we get 25mA, which can be
given to the evaluation board.
But the problem here is I'm unable to find a 200:1 CT with 0.1% accuracy.
The 0.1% is mandatory as the ade7758 is having the same accuracy.
Please help me out by getting me few links for getting a high precision current transformer. I tried out in google....but i did not get the required results. suggest me some good search strings for google.