Abstract: Adjacent 25 Hz phase-sensitive track circuit sections are separated by insulated joints. However, due to the need for traction return currents, all sections are connected in terms of physical structure, resulting in special positions where neighboring sections affect each other. This paper tests and analyzes the following problems that occurred on site: the red-light strap caused by the insulation of the frogs of a intersecting crossover with 25Hz track circuits, and the failure of a track relay to drop due to the unreasonable positions of the transverse connection lines and the boosting cables. This paper also finds the solution to provide electrical maintenance and construction personnel with some ideas when dealing with related problems.

Key words: electrification section, 25Hz phase-sensitive track circuit, special position, red-light strap, transverse connection lines and boosting cables

摘要： 相邻25 Hz相敏轨道电路区段采用绝缘节隔离，但由于牵引回流需要，所有区段从物理结构上来说是相通的，造成特殊位置相邻区段相互影响。通过对现场发生的25 Hz轨道电路交叉渡线岔心绝缘导致的红光带问题以及横向连接和吸上线位置设置不合理造成轨道继电器不落下的问题进行测试和分析，并找出解决办法，给电务维修以及施工人员在处理相关问题时提供一些思路。

关键词: 电化区段, 25?Hz相敏轨道电路, 特殊位置, 红光带, 横向连接和吸上线