本指南提供了有关高压（>1000 V）保险丝和相关设备的应用、操作和协调的信息。IEEE Std C37中提供的信息补充。48（TM）。本指南适用于以下特定类型的设备，拟用于交流配电和电力等级系统: a） 配电和功率级限流型熔断器。 b） 配电和功率级限流熔断器隔离开关。 c） 保险丝外壳包装中使用的a）和b）项。 d） 用于配电和电力级保险丝以及保险丝隔离开关的保险丝支架。 e） 通过在配电或电源级保险丝支架中使用可拆卸开关片来断开设备。 f） 配电级和功率级限流，以及与电容器单元、单元组或电容器组一起使用的外部电容器熔断器的组合类型。 g） 备用限流熔断器（“电机起动器熔断器”）与高压E2级电机起动器一起使用（见ANSI/UL 347[B1]2）。

This guide provides information on the application, operation, and coordination of high-voltage (>1000 V) fuses and associated equipment. The information supplements that presented in IEEE Std C37.48(TM). These guidelines apply to the following specific types of equipment, intended for use on alternating current distribution and power class systems: a) Distribution and power class current-limiting type fuses. b) Distribution and power class current-limiting fuse disconnecting switches. c) Items a) and b) used in fuse enclosure packages. d) Fuse supports of the type intended for use with distribution and power class fuses, and fuse disconnecting switches. e) Disconnecting devices created by the use of a removable switch blade in a distribution or power class fuse support. f) Distribution class and power class current-limiting, and combination types of external capacitor fuses used with a capacitor unit, groups of units, or capacitor banks. g) Backup current-limiting fuses ("motor-starter fuses") used in conjunction with high-voltage Class E2 motor starters (see ANSI/UL 347 [B1]2).