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    • Compared with PLC band-pass couplers, transformer coupling circuits are widely used in low-voltage PLCs. Why?

    * Question

    Compared with PLC band-pass couplers, transformer coupling circuits are widely used in low-voltage PLCs. Why?


    *     Answer

    Mainly because:

    1 transformer current can isolate the power line network;

    2 in the high-voltage transient saturation, the transformer can be used as a limiter.


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