DEVICE TO CONTROL CROSSING ALARM Russian patent published in 2014 - IPC B61L29/24 

FIELD: electricity.

SUBSTANCE: device to control crossing alarm comprises a circuit of control of crossing traffic lights connected with crossing traffic lights, and a rail chain of a section approaching the crossing, having rail lines limited by isolation joints. Equipment of a supply end of a rail chain includes a source of AC current and a detector of jumps of amplitude of inlet current of the rail chain, and composition of equipment of a relay end includes a source of power supply, a voltage accumulator, a voltage stabiliser, a pulse generator and a switch of relay end switching. Equipment of the relay end is connected to rails from the isolation joint, which limits the section approaching the crossing, at the distance not exceeding the area of additional shunting.

EFFECT: increased length of a section approaching a crossing.

2 dwg