本文件描述了核电站安全壳外部室内区域开关设备组件的鉴定方法和要求。这些组件包括:a）IEEE Std C37中定义的金属封闭低压电力断路器开关设备组件。20.1¿¿¿; b） IEEE标准C37中定义的金属包层开关设备组件。20.2¿¿¿; b） IEEE标准C37中定义的金属封闭母线。23¿¿¿; c） IEEE标准C37中定义的金属封闭式断路器开关设备组件（1 kV至38 kV）。20.3¿¿¿

This document describes the methods and requirements for qualifying switchgear assemblies for indoor areas outside of the containment in nuclear power generating stations. These assemblies include the following: a) Metal-enclosed low-voltage power circuit breaker switchgear assemblies, as defined in IEEE Std C37.20.1™; b) Metal-clad switchgear assemblies, as defined in IEEE Std C37.20.2™; b) Metal-enclosed bus, as defined in IEEE Std C37.23™; c) Metal-enclosed interrupter switchgear assemblies (1 kV to 38 kV), as defined in IEEE Std C37.20.3™