本标准规定了交流配电系统用高压（1000 V以上）熔断器和附件的设计试验要求。包括额定最大电压为170 kV的设备。本标准适用的装置如下:a）熔断器（包括熔断器）；b） 限流熔断器；c） 保险丝外壳包装中使用的a）和b）项；d） 与保险丝和保险丝隔离开关一起使用的保险丝支架；e） 通过在保险丝支架中使用可拆卸保险丝单元或开关片创建的隔离装置（保险丝隔离开关、隔离开关和隔离断路器）； f） 与电容器单元、一组单元或电容器组一起使用的外部电容器熔断器的排除型、限流型和组合型；g） 备用限流保险丝（a？电机起动器保险丝a？）与高压电机起动器配合使用；h） 仅与熔断器和熔断器隔离开关一起使用时的熔断体；i） a）至f）项具有整体负载中断方式。本标准也可作为测试与范围内所列设备类似的其他设备的基础。 此外，在适用的情况下，与喷射式熔断器相关的零件可用于非喷射式熔断器，在该非喷射式熔断器中，中断过程等待自然电流为零以清除电路。制造商和用户应就此类设备的任何规范或测试达成一致。

This standard specifies design test requirements for high-voltage (above 1000 V) fuses and accessories for use on ac electrical distribution systems. Devices with rated maximum voltages to 170 kV are covered. The devices to which this standard applies are as follows: a) Expulsion fuses (including fuse cutouts); b) Current-limiting fuses; c) Items a) and b) used in fuse-enclosure packages; d) Fuse supports of the type intended for use with fuses and fuse disconnecting switches; e) Disconnecting devices (fuse disconnecting switches, disconnecting switches, and disconnecting cutouts) created by the use of a removable fuse unit or switch blade in a fuse support; f) Expulsion, current-limiting, and combination types of external capacitor fuses used with a capacitor unit, a group of units, or capacitor banks; g) Backup current-limiting fuses ("motor-starter fuses") used in conjunction with high-voltage motor starters; h) Fuse links when used exclusively with expulsion fuses and fuse disconnecting switches; i) Items a) through f) having integral load-break means. This standard may also be used as a basis for testing other devices that are similar to the devices listed in the scope. In addition, the parts relating to expulsion fuses may, where applicable, be used for non-expulsion fuses in which the interruption process waits for a natural current zero to clear the circuit. The manufacturer and the user should agree on any specifications or tests performed for such devices.