1.范围本标准适用于在高压开关设备和控制设备的室内或室外安装中，使用干燥空气、惰性气体（如六氟化硫、四氟化碳或氮气或其混合物）加压的铸造铝合金外壳，其中气体主要用于其双电和/或灭弧性能，额定电压（1）1kV及以下（含52kV），设计压力大于3bar（表压）的充气隔间；以及（2）72.5 kV及以上。外壳包括电气设备的部件，不必限于以下示例:断路器开关- 隔离开关隔离开关接地开关电流互感器电压互感器电涌放电器母线和连接范围还包括加压部件，如带电储罐开关设备的中心室、气体绝缘电流互感器等。加拿大偏差包含在本标准中。

1. ScopeThis Standard applies to cast aluminium alloy enclosures pressurized with dry air, inert gases, eg. sulphur hexafluoride, carbon tetrafluoride, or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high-voltage switchgear and controlgear, where the gas is used principally for its di electric and/or arc-quenching properties, with rated voltages (1) 1 kV and up to and including 52 kV and with gas-filled compartments with design pressure greater than 3 bar (gauge); and (2) 72.5 kV and above.The enclosures comprise parts of electrical equipment not necessaril y limited to the following examples:Circuit-breakers Switch-disconnectors Disconnectors Earthing switches Current transformers Voltage transformers Surge arresters Busbars and connectionsThe scope also covers pressurized components such as the centre chamber of live tank switchgear, gas-insulated current transformers, etc.Canadian Deviations are included in this Standard.