为提高JZXC - 480型轨道电路一次调整的能力，提出改变轨道继电器返还系数的方法，并进行计算机仿真计算。

A method for improving the ability of JZXC 480 track circuit once adjusting was presented. The method is to in crease the ratio of release voltage and work voltage of track relay.

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电子模块取代原有的继电器，直接实现对道岔、信号机、减速器的控制和对轨道电路的状态识别。

Electronic modules, instead of traditional relays, perform directly the control of switches, signals and retarders and identification of the status of the track circuits.

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