Adaptation of two-line railway track circuits to increase resistance to back propulsion current interference

摘要

Adjusting dvoupasových rolling circuit for enhanced immunity retroactive traction current consists in modifying the structure of the contact transformer so that after charging the other components are able to actively symmetrised changing the transformation ratio Sections I and II of the magnetization of the core, thus ensuring the lowest possible value Stray electrical noise in section III , the system will continue to monitor the position of sliding turns and when the threshold is exceeded declares the track circuit as defective. An adjustment is formed so that inlets (K1, K2) from rails are located Hall sensors (HS1, HS2) which are connected to a comparison and evaluation circuit (VO), which is connected to the servo (S) connected to the coupling ( K3) to the second transformer and the contacting also to the outlet (P2) of the terminal contact for reporting critical unbalance, wherein in the reference and evaluation circuit (VO) is connected to an inlet (P1), the power supply for this circuit and the servo (S).