第一讲:我国目前采用的几种轨道电路(上) 一、什么是轨道电路 以两条平行的钢轨作为导线,钢轨接头处加接续线(俗称勾线),在一定长度的钢轨线路两端装设绝缘节,在送电端接上电源及限制器(用以调整电压、电流的大小),在受电端接上轨道继电器,并使电流在一定的轨道线路 Lecture 1: Several Track Circuits Currently Used in China (1) What is a rail circuit with two parallel rails as the wires, a connecting line at the rail joints (commonly known as a hook line), and two ends of a rail line at a certain length The installation of insulation section, the power supply terminal connected to the power and limiter (to adjust the voltage and current size), connected to the receiving end of the track relay, and the current in a certain track line