3-Phase VI measurment

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

  1. ABandy

    Thread Starter New Member

    Oct 8, 2014
    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
    an analog opto isolator.