本文件的范围是提供选择特定交流输电或副输电系统中性点接地等级和方式时的基本因素和一般注意事项，以及用于实现所需接地的建议方法和设备。本指南本部分中使用的接地术语定义见IEEE Std C62。92.1（TM）。

The scope of this document is to provide the basic factors and general considerations in selecting the class and means of neutral grounding for a particular ac transmission or subtransmission system, and the suggested method and apparatus to be used to achieve the desired grounding. Definitions of grounding terms used in this part of the guide can be found in IEEE Std C62.92.1(TM).