METHOD OF MEASURING ELECTRICAL RESISTANCES IN INHOMOGENEOUS RAIL TRACKS ON ELECTRIFIED SECTIONS OF RAILWAYS Russian patent published in 2019 - IPC G01R27/16 B61L23/16 

FIELD: railway automation; telemechanics.

SUBSTANCE: invention relates to railway automation and telemechanics. Method of measuring electrical resistances in inhomogeneous rail tracks on electrified railways consists in measuring the value of traction currents in rails at the beginning and at the end of the selected section in normal mode of operation and in the mode of short-circuit of rails on the ground at the end of the section, as well as voltage between rails and remote ground at the beginning of section in normal mode of its operation and at end of section in short-circuit mode. Then the rail resistance value is calculated at the second half of the section along the traction current by multiplying the voltage between the rails and the remote ground at the end of the section in normal mode of its operation on ratio of current difference in rails at beginning and end of section in short-circuit mode to current product difference in beginning of section in normal operating mode and current at end of section in short-circuit mode, from which current product at end of section in normal mode of operation and current at beginning of section in short-circuit mode is subtracted. Resistance value between rails and ground is calculated by multiplying found value of rail resistance at second half of section on the ratio of current at the end of the section in the short-circuit mode to the difference of currents at the beginning and end of the section in the short-circuit mode. Resistance of rails at first half of section is calculated as difference of ratio of voltage between rails and remote ground to current at the beginning of section in short-circuit mode and the ratio of the product of found values of rail resistance at the second half of the section and the resistance between the rails and the ground to their sum.

EFFECT: technical result when implementing proposed solution is determination of numerical values of resistance between rails and ground and resistance of rails halves for selected section of rail line.

1 cl, 2 dwg