What is the frequency cycle on the running rails?

The frequency cycle on the running rails is typically expressed in terms of the alternating current (AC) frequency used for the power supply, particularly in electric rail systems. For many electric railways, the standard frequency is 25 cycles (or Hertz), which corresponds to the power supply frequency used for locomotives and other electric train systems. This frequency allows for efficient operation and minimal strain on the electrical components, contributing to stable and continuous performance of electric trains over long distances.

The 25 cycles frequency aligns with established standards in many rail systems worldwide, particularly in regions where 25 kV AC is employed as the electrical supply standard. Understanding this frequency is vital for maintaining and troubleshooting the electrical systems of trains, as it directly impacts the performance and efficiency of train operations.