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Abstract <p>Various signal currents, for example, the current of rail circuits, are used to detect the fracture of rails. At the same time, in areas with electric traction, there is always a traction current in the rail lines that can be used as a signal current. An abrupt increase in the asymmetry of the traction current may be a signal of the occurrence of a rail fracture. The article presents some results of studies of how the asymmetry of the first and third harmonics of alternating traction current at the ends of a rail circuit changes when the rail breaks. The studies were carried out at different lengths of rail circuits, at different values of the traction current in the rail line and at different types of asymmetry of the resistances of the rail threads in it. It is shown that the fracture of the rail dramatically increases the relative asymmetry of the alternating traction current at the ends of the rail circuits. It is shown that this method ensures timely and reliable detection of a rail fracture.</p>

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Traction Current in Rail Lines as a Source of Information about Rail Breakage

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • V. I. Shamanov,
  • D. V. Denezhkin

摘要

Abstract

Various signal currents, for example, the current of rail circuits, are used to detect the fracture of rails. At the same time, in areas with electric traction, there is always a traction current in the rail lines that can be used as a signal current. An abrupt increase in the asymmetry of the traction current may be a signal of the occurrence of a rail fracture. The article presents some results of studies of how the asymmetry of the first and third harmonics of alternating traction current at the ends of a rail circuit changes when the rail breaks. The studies were carried out at different lengths of rail circuits, at different values of the traction current in the rail line and at different types of asymmetry of the resistances of the rail threads in it. It is shown that the fracture of the rail dramatically increases the relative asymmetry of the alternating traction current at the ends of the rail circuits. It is shown that this method ensures timely and reliable detection of a rail fracture.