FIELD: electrical engineering; insulated-neutral power lines. SUBSTANCE: line voltage and natural line unbalance voltage (voltage to neutral) are measured and their waveform curves are recorded simultaneously, first harmonic of natural line unbalance voltage is separated, its real and imaginary components relative to line voltage are determined and divided by loin voltage, capacitor of value C is inserted between one of line phases and ground, line voltage and voltage to neutral are measured and their waveforms are recorded simultaneously, first harmonic of voltage to neutral is separated, real and imaginary components of first harmonic of voltage to neutral relative to line voltage are determined and divided by line voltage, data obtained are used to determine line capacitance to ground and insulated-neutral line damping coefficient. EFFECT: improved measurement accuracy and simplified measuring circuit arrangement, improved safety of measurement procedure. 1 dwg
