Transformer zero-sequence current protection What is the role

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 Run in the neutral grounding grid transformers are installed in the zero-sequence current protection when the transformer hig h-side or high-pressure side of the line is grounded, the zero sequence current and zero sequence current protection action. That the transformer low voltage winding is delta connected.

    It can be used as the high voltage winding of the transformer pinout bus is shorted to ground protection, while the adjacent lines and the transformer itself is the main protection for backup protection.