该方法适用于小接地电流系统的各种中性点运行方式，并且现场安装简单、不需要定值整定。

This method is suited for various distribution system with different neutral grounding modes. Moreover, it can be easily used in site without adjusting protective setting.

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分析了采用小电阻接地系统的必要性及该系统的故障特性。

The necessity of low resistance ground system and its fault characteristic were analyzed.

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如果在两个接地点存在一个小的电势差，在系统的敏感部分就会有接地电流通过。

If a small potential difference exists between two ground points, some ground currents may flow through a sensitive part of the system.

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