本文件给出了设计和安装 现有的气体绝缘变电站（GIS）设备和以后增加的新GIS设备，可能具有不同的设计和不同的制造商。推荐做法适用于额定电压高于52 kV的GIS。它们还包括气体绝缘线路（GIL）设备和额定电压高于52 kV的GIS设备之间的接口。

This document gives the recommended practices for designing and installing the interfaces between existing gas-insulated substation (GIS) equipment and new GIS equipment that is added at a later date and may be of different design and of different manufacturer. The recommended practices apply for GIS rated above 52 kV. They also include the interfaces between gas-insulated line (GIL) equipment and GIS equipment rated above 52 kV.