RAIL CIRCUIT Russian patent published in 2015 - IPC B61L23/16 

FIELD: electricity.

SUBSTANCE: invention relates to railway automation and can be used in systems of interval regulation of underground trains traffic. The system contains a rail line, to the ends of which through series-connected capacitors the track generator and receiver are connected respectively. The track generator and receiver are designed with a possibility of additional superposition of coding of automatic locomotive signal system in low-frequency range by the signal of square waveform. The rail circuit is equipped with two symmetric voltage limiters, connected parallel to leads of capacitors respectively on the supply and receiving ends of the rail circuit. The stabilization voltage of each limiter is selected not below the maximum amplitude of voltage of the signal of rail line monitoring on the leads of the relevant capacitor in normal mode. Thresholds of engaging and release of the rail circuit are set not higher than the voltage at the receiver of the rail circuit at shunting of one of capacitors in a normal mode.

EFFECT: possibility of operation of resonance rail circuits with high-frequency signals of rail line monitoring and ALS-ARS (automatic locomotive signalling - automatic regulation of speed) on one line with rail circuits with low-frequency coding of ALS-ARS without additional equipping of the train equipment with devices for reception of high-frequency ALS-ARS signals is achieved.

2 dwg