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  • What is the transformer protection TA disconnection criterion?

    * Question

    What is the transformer protection TA disconnection criterion?


    *
    Answer

    1 When the zero-sequence current appears on the △ side of the transformer, it is judged that the TA is disconnected on the side;

    2 on the Y side of the transformer, if it is an ordinary winding transformer, the zero-sequence current difference between the self-produced zero-sequence current and the neutral point TA of the transformer exceeds a certain value.A value, that is, the side TA is determined to be disconnected, and an alarm signal is delayed.


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