本标准规定了高压（1000伏以上）配电级限流型熔断器及相关附件的规范。所有这些设备都适用于交流系统。这些规范适用于以下特定类型的设备: a） 配电级限流型熔断器和熔断器单元。 b） 配电级限流熔断器隔离开关。 c） 保险丝外壳组件（FEP）中使用的（a）至（b）项（见下文第1.1条所列类型） d） 专门用于配电级限流型保险丝和保险丝隔离开关的保险丝支架、保险丝单元、充电单元和保险丝座。 e） 专用于配电级限流型熔断器和熔断器隔离开关的可拆卸开关叶片。

This standard establishes specifications for high voltage (above 1000 volts) distribution class current limiting type fuses and associated accessories. All of these devices are intended for use on alternating current systems. These specifications apply to the following specific types of equipment: a) Distribution class current limiting type fuses and fuse units. b) Distribution class current-limiting fuse disconnecting switches. c) Items (a) thru (b) used in fuse enclosure packages (FEP) (see types listed in Clause 1.1 below) d) Fuse supports, fuse units, refill units and fuse mountings of the type used exclusively with distribution class current limiting type fuses, and fuse disconnecting switches. e) Removable switch blades of the type used exclusively with distribution class current limiting type fuses, and fuse disconnecting switches.