FIELD: electricity.
SUBSTANCE: method is based on the creation of a DC electric circuit closed through 'Earth' potential with a pair of cable cores in track circuits. A specified direct current is formed in the loop and the decrease of the current running through the elements connecting pairs of cable cores or a pair of cable cores with the 'Earth' potential below the acceptable value is controlled. Wherein the insulation fault in a cable is detected by comparing the magnitudes of currents at the inputs of the cable cores with the currents at their outputs. The insulation resistance between the pairs of cable cores or a pair cable cores and the 'Earth' potential is determined by a current leakage, current magnitude difference at the input and output of a pair of cable cores and the total resistance of the circuit elements located between the pairs of the cores of a cable with a damaged insulation. The device implementing the method includes a control circuit, control current forming unit, leakage current simulation unit and comparing unit.
EFFECT: discontinuity of monitoring the soundness of cable cores in track circuits at the initial stage of cable insulation fault.
3 cl, 1 dwg
