Hey all,

I need to measure an AC current of 0-6A rms using a CT. I have searched for CTs in the internet and found out that many of them go upto about 30A (some of them higher). If I use one of them (max 30A) will it reduce the resolution of the detected current ?

If so how can I increase the resolution ?(I am thinking of measuring atleast 50mA increments)

Also please tell me how to interface the CT to the PIC

thanks in advance !!!!!!!!!!!!!!!

 

A current transformer converts the AC current to AC voltage.
How about amplifying the voltage using an op amp?

 

Simply put more loops of the current carrying conductor through the center of the CT. If you have a 30A CT, put 5 loops through the center and it becomes a 6 A CT.