METHOD FOR DETERMINING THE RESIDUAL LIFE OF ELECTRICAL WIRING Russian patent published in 2018 - IPC G01R31/02 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the technique of electrical measurements. Essence: the transient resistance of the contacts and conductors is measured, the impedance of the insulation of the circuit is phase-zero, phase-phase, phase-protective conductor, total insulation resistance of the circuit phase – protective conductor without disconnection of the power source and tripping of the residual current device, impedance of the line and circuit, resistance of the grounding devices and the expected short-circuit current, differential earth leakage current, absorption coefficients, polarization. Measured parameters are used to form instrumental influencing factors in the fuzzy logic system and normalize them. Range of variation of the remaining life of the wiring is adjusted. In addition, the insulation resistance, differential leakage current to the ground, absorption coefficients, polarization are periodically measured. Measured values are stored as a numbered row in the data table. Using the method of factor analysis of the parameters for each set of parameter values the value of the total factor is calculated, which is an integral indicator of the increase in defects (IIID). IIID in the corresponding row of the results table. Difference between the values of the IIIDs located in the adjacent rows of the results table is calculated. Percentage change is calculated in the value of the difference calculated on the current operating interval relative to the value of the difference calculated on the initial interval is calculated. If the percentage change is exceeded, the values of + 80 % are notified of the occurrence of a pre-failure state.

EFFECT: increase in operational reliability and the ability to operate electrical wiring in terms of resource and status.

1 cl, 2 tbl