When possible, try to maintain a single system ground point.
如果可能，应尽量采用单一的系统接地点。
The zero-sequence current protection is an important means of power system ground protection.
零序电流保护是一种重要的接地保护方法。
The zero-sequence current protection is an important means of power system ground protection.
零序电流保护是一种重要的接地保护方法。
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