3-Phase VI measurment

Discussion in 'The Projects Forum' started by ABandy, Oct 8, 2014.

  1. ABandy

    Thread Starter New Member

    Oct 8, 2014
    7
    0
    Hello all,

    My current project involves me detecting the voltage (0-400v) and current (0-10A) on each phase coming from a drive to a motor.

    My orignal idea was to use a CDS4015ABC-KA (RS : 763-9769) for current, and usinig a potential divider to step down the voltage (with respect to drive neutral)
    Both signals to be read by a 5 or 3.3v PIC

    First issue I have designing this is that I will have to put in a layer of isolation between the divider and my uC. What would be the best way to do this to keep the best accuracy?
    My second issue would be I cannot find an all-in-one solution, do they not exist?

    My apologies if this is a simple question, for all my professional life, I have been a digital / firmware engineer, and most analogue sensing I need to do has a all-in-one IC.

    Thank you.
     
  2. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    an analog opto isolator.
     
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