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Thread: how to measure amps on 4160V motor

  1. #11
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    Quote Originally Posted by GoldDigger View Post
    A wraparound current transducer coil (Rogowski coil) has all sorts of potential advantages for a situation like this. No need to disturb the wire, no bulky split core current transformer to add to the untouched wire.
    You can put these in the motor doghouse?
    What's the output signal on these

  2. #12
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    Quote Originally Posted by emiller233 View Post
    You can put these in the motor doghouse?
    What's the output signal on these
    The downside is that the voltage output signal at high impedance has to go through an amplifier processor circuit. I do not recall the exact nature of the output signal.

    Sent from my XT1585 using Tapatalk

  3. #13
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    Quote Originally Posted by GoldDigger View Post
    The downside is that the voltage output signal at high impedance has to go through an amplifier processor circuit. I do not recall the exact nature of the output signal.
    Yep, high impedance.
    The ones I have seen are 150 mv at rated load and output is not linear with current.

    But, they worked great and were close enough for us.

    I've seen readouts allowing tailoring the output curve to account for the non-linearity -but I have never worked any
    Without data you’re just another person with an opinion – Edwards Deming

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