本标准描述了用于在电力线载波频率（30 kHz至500 kHz）下传输离散远程保护信号的电力线载波发射器/接收器设备的要求。定义了确定性能的测试要求和条件以及制造要求。本标准不包括用于数据传输的宽带或单边带（SSB）电力线载波设备，也不包括用于配电电路的自动化负载管理终端设备。

This standard describes the requirements for power line carrier transmitter/receiver equipment used to transfer discrete teleprotection signals at power line carrier frequencies (30 kHz to 500 kHz). Test requirements and conditions for determining performance, as well as manufacturing requirements, are defined. This standard does not include broadband or single sideband (SSB) power line carrier equipment used for data transmission, nor does it include terminal equipment used on distribution circuits for the purpose of load management of automation.