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  1. wilkin1

    polarity of ground fualt detection ct on the neutral

    It is standard practise to fit cts with P1 to the busbars or machine. The single line or wiring scematic can then be followed where REF or DIFF cts require the correct polarity in relation to each other. For SBEF polarity is not important.
  2. wilkin1

    Metering harmonics

    Are there rules regarding the use of earthed primary VOLTAGE TRANSFORMERS for tariff metering

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