本标准涵盖了核电站一次安全壳外使用的1E级保护继电器和辅助设备的鉴定。位于核电站一次安全壳内的保护继电器和辅助设备的特殊情况超出了本文件的范围。

This standard covers qualification of Class 1E protective relays and auxiliaries to be used outside the primary containment in the nuclear power generating stations. Protective relays and auxiliaries located inside the primary containment in a nuclear power generating station present special conditions beyond the scope of this document.