本标准规定了额定电压高达8.3 kV的高压（1000 V以上）配电级封闭单极空气开关及相关附件的设计试验和规范。所有这些设备都适用于交流配电系统。这些设计试验和规范适用于以下特定类型的设备:a）配电级封闭单极空气开关；b） 支架、安装件、熔断器钩和钳子，所有类型均专用于配电级封闭单极空气开关；c） 配电类封闭单体- 外壳组件中使用的极空气开关

This standard establishes design tests and specifications for high-voltage (above 1000 V) distribution class enclosed single-pole air switches and associated accessories with rated voltages up to 8.3 kV. All of these devices are intended for use on alternating current distribution systems. These design tests and specifications apply to the following specific types of equipment: a) Distribution class enclosed single-pole air switches; b) Supports, mountings, fuse hooks, and tongs, all of the type used exclusively with distribution class enclosed single-pole air switches; c) Distribution class enclosed single-pole air switches used in enclosure packages