Current transformer resolution

Discussion in 'General Electronics Chat' started by gehan_s, Nov 26, 2012.

  1. gehan_s

    Thread Starter Member

    Sep 17, 2012
    38
    0
    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 !!!!!!!!!!!!!!!
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,421
    3,356
    A current transformer converts the AC current to AC voltage.
    How about amplifying the voltage using an op amp?
     
  3. BillB3857

    Senior Member

    Feb 28, 2009
    2,400
    348
    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.
     
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