Tag: #voltagetransformer

  • EK Electrical Oct 2024 (Q9)

    EK Electrical Oct 2024 (Q9)

    With reference to reverse power protection for a.c. generators operating in parallel: (a) Explain why traditional reverse power relays, operating on mechanical principles, have been replaced by electronic digital microprocessor types (2) (b) Describe, with the aid of a sketch, a generator reverse power protection circuit that uses an electronic phase sensitive detector. (8) 10…

  • EK Electrical Dec 2021 (Q9)

    EK Electrical Dec 2021 (Q9)

    Describe with the aid of a circuit diagram, the operation of an automatic voltage regulator, which employs the use of thyristor (10) Dec 2021 (Q9)