IEC/TR 62711:2011（E）提供了一致使用助记符和限定符号的建议，这些符号用于表示变电站、发电站、电力利用和转换设施以及电力系统自动保护设备的监测、保护、切换和控制系统中所用设备的符号。这些建议适用于此类系统的设计师、制造商和工程师。

IEC/TR 62711:2011(E) provides recommendations for consistent use of mnemonics and qualifying symbols to be applied to symbols representing devices used in systems for monitoring, protection, switching, and controlling of apparatus in electrical substations, generating stations, power utilization and conversion facilities, and equipment designed for automatic protection of power systems. The recommendations are intended for designers, manufacturers and engineers of such systems.