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  1. dtawse

    faulty meter in Sub

    I am working in another part of the state at the moment but will have to physically check the connections or get someone to do it for me and I will post the info ASAP. As you pointed out when added using complex numbers or vectors the white phase current should show zero but it did not and it...
  2. dtawse

    Great site

    I am new to this site but so far have found it to be very interesting and informative. Thank you to every one who has replied to my other thread. Great site keep up the good work everyone
  3. dtawse

    faulty meter in Sub

    The system is definently three wire three phase, no neutral conection. As DanDel pointed out the white phase is derived by taking the sum of the red and blue phase and reversing the result. I am a trainee protection tester and have been asked to do some research on this. Ther powers that be...
  4. dtawse

    faulty meter in Sub

    it was in a 66kV/22kV substation. I believe the meter was on the HV side. at this point in the system it is three wire three phase.
  5. dtawse

    faulty meter in Sub

    I'm sorry i made a mistake, it is an ammeter (getting the info second hand) and the CT's are on the red and blue phases and the white is derived from that. Not sure what the exact current readings where but the current on the white phase was showing slightly different but not enough to be of...
  6. dtawse

    faulty meter in Sub

    The volt meters in a lot of our subs meter only the red and blue phases and calculate the white phase. These are old electro-mechanical meters not electronic or transducer types. We lost white phase but the meter continued to give a soild (although not quite normal) reading. On paper we have...

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