本标准适用于插入电力线以在电力线载波频率（30 kHz至500 kHz）下提供高阻抗的线路陷波器。其目的是将载波信号与插入点后面的故障或切换引起的系统阻抗变化隔离开来，并将信号引导到正确的方向。该标准涵盖了主线圈设计为单相风冷干式电感的线路陷波器。

This standard applies to a line trap inserted into a power line to provide a high impedance at power line carrier frequencies (30 kHz to 500 kHz). The purpose is to isolate the carrier signal from system impedance changes due to faults or switching behind the point of insertion, and to guide the signal in the proper direction. The standard covers line traps in which the main coil is designed as a single-phase, air-cooled inductor of the dry type.