“站内轨道电路分路不良”是电务信号设备惯性故障,直流、交流、移频、相敏、计数等制式轨道电路都存在“站内轨道电路分路不良”的隐患。雨季钢轨生锈或个别到发线不走车或长期停有车辆时,难以保证轨道电路正常运用的电气参数,造成轨道电路分路不良,使电务信号联锁失效。因此京铁师(1997)7号文件明确规定:轨 “In-station track circuit shunt bad ” is the inertia fault of the service signal equipment, and there are hidden dangers such as DC track, AC track, frequency shift track, phase sensitive track and count track circuit. When the rains are rusty in the rainy season or the cars do not go for a long time or stop for a long time, it is difficult to ensure the normal electrical parameters of the track circuit, resulting in poor track shunting and invalidating the interlock of the service signal. Therefore, Beijing Iron and Steel division (1997) on the 7th document clearly states: rail