FIELD: electrical engineering.
SUBSTANCE: invention relates to measuring the parameters of high-voltage and low-voltage three-phase switches in operating electrical networks, in particular, the timing of the closing and opening of contacts. The technical result is achieved by the fact that a method is proposed for remote diagnostics of the time intervals of contacts of three-phase switches in operating electrical networks, characterized by the fact that a tripod is installed in front of the switches at an insulating voltage distance, a magnetic antenna in the form of an inductance coil is fixed on it, the axis directed perpendicular to the terminals of the three-phase switch, in which active operating currents of the phases create the magnetic field strength and magnetic flux, connect the output of the magnetic antenna to the input of the analog-to-digital converter of the digital oscilloscope, the output of the latter is connected to a computer, on which, according to a special program, the voltage changes proportional to the currents of the electric network are visualized as oscillograms, and when switching the contacts of the switch, pulse harmonic processes are distinguished, according to the maximum values of which the time intervals of the divergence of the contacts of the switch are recorded.
EFFECT: improves the performance and increasing the accuracy of processing the results of measuring the temporary parameters of contacts when switching three-phase switches in operating electrical networks.
1 cl, 4 dwg
