Investigation of a track circuit operation under conditions of saturation of the track’s impedance bonds

Abstract

The article’s purpose is studying the operation of the code track circuit in the conditions of track’s impedance bonds saturation. Results. The dependences of the track receiver voltage on the asymmetry current magnitude for the insulation resistances in the winter and summer period are obtained, provided the track’s impedance bonds saturation. It is established that, due to an increase in the asymmetry current, there can be a decrease in the voltage across the track receivers below the threshold, which is a failure of the track circuit, the elimination of which requires the use of a whole range of measures. Scientific novelty consists in applying an indirect calculation method based on obtaining the coefficients of the impedance bond’s equivalent circuit for various values of the resistance modules of the magnetization circuit, which change during the magnetization of the impedance bonds magnetic core by DC. The obtained method makes it possible to perform calculations of the code track circuit normal operating mode under the conditions of the impedance bonds’ saturating. Practical significance. The proposed indirect method can be used to adjust the calculation of the track circuits operating modes, with considering the saturation of track impedance bonds.