FIELD: electricity.
SUBSTANCE: method consists in: detection of short-circuit in a three-phase electrical network; determination of the value of directional phasor in the measurement point of the three-phase electrical network and comparison of determined value of directional phasor with pre-set boundaries on the complex plane. According to the invention, on the basis of the above-stated comparison, a neutral state of ground connection of the electrical network is determined, and one or more configurations of ground-fault protection system are applied on the basis of the above-stated determined neutral state of ground connection of the electrical network.
EFFECT: improvement of precision and sensitivity of the protection system.
13 cl, 4 dwg
