Асимметрия рельсовых цепей с реле ДСШ-2

Abstract

Objective: To consider the causes and ways to reduce voltage sags on resonant track relays of track circuits with dssh-2 relays. Methods: Analysis of voltage depressions causes on a track relay with track circuit, free of rolling stock on rails, was carried out by means of natural experiments with oscillography and voltage on a track relay analysis, as well as measurement of insulation resistance of rail lines and the inductances of the main windings of transformers. Results: It was determined that one of the causes of voltage depressions on road relays were the transverse asymmetry of the resistance of rail lines caused by metal chips generated by pantograph trains when passing a nonoverlayable interval on the approach to the station. The impact of longitudinal spin asymmetry of rail line resistance on voltage sags, which is formed by a variation in inductance of the primary winding sections of an impedance bond. The relationship of voltage sags and the methods of rolling stock handling as well as places of electric power cut-offs’ was studied. Practical importance: The rule of connecting the main windings of transformers to the rails of sections was proposed, in order to reduce the impact of the variation in total inductance of transformers’ sections on the longitudinal asymmetry of rail line resistance. The conducted research made it possible to determine the causes and ways to reduce voltage dips on the resonant track relays of track circuits with dssh-2 relays.