本标准包含52 kV以上交流（ac）应用的气体绝缘变电站（GIS）的要求。GIS是开关和总线组件的组件，可能包含许多总线、断路器、开关、仪表变压器、避雷器和一次终端。本标准包括GIS中隔离开关、接地开关和故障接地开关的所有要求（包括开关要求）。对于构成GIS的其他组件，附加和/或特定GIS要求包含在本标准中。

The requirements for gas-insulated substations (GIS) for alternating current (ac) applications above 52 kV are contained in this standard. GIS is an assembly of switching and bus components and may contain a number of buses, circuit breakers, switches, instrument transformers, arresters, and primary terminations. This standard includes all the requirements (including switching requirements) of disconnect switches, ground switches, and fault making ground switches included in a GIS. For the other components comprising the GIS, the additional and/or specific GIS requirements are contained in this standard.