How to build overcurrent, overvoltage, and reverse polarity protection circuit

Discussion in 'The Projects Forum' started by nurhidayah, Aug 16, 2019 at 2:10 AM.

  1. nurhidayah

    Thread Starter New Member

    Thursday
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    upload_2019-8-16_13-50-54.png

    Hello All... We need inputs from you on how to build overcurrent/overvoltage protection circuit between chiller and it's controller. Because we sometimes encountered that when chiller gets faulty during running it also damages the controller, or vice-versa. We want to put protection between controller and chiller the avoid damaging each other. The image shown is the wiring between controller and chiller. Really appreciate any inputs. Thanks.
     
  2. dl324

    AAC Fanatic!

    Mar 30, 2015
    8,521
    2,049
    Welcome to AAC!

    Consider TVS diodes and PTC fuses. If you're more specific about what your protecting, you'll get more specific answers.
     
  3. crutschow

    Expert

    Mar 14, 2008
    22,492
    6,588
    Those are three separate functions that require three different circuits.

    What are the voltage and current of the lines?

    Are they AC or DC?

    Where is the overvoltage coming from?
     
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