FIELD: electricity.
SUBSTANCE: method and device for assessment of angle of zero-phase-sequence voltage includes determining angles of the respective phase voltage values among three phase voltage values, determining type of neutral grounding in the distributing network and assessing angle of zero-phase-sequence voltage at single line-to-ground fault in the distributing network by means of determined angles of the respective phase voltage values in compliance with type of neutral grounding in the distributing network.
EFFECT: higher accuracy.
16 cl, 17 dwg, 1 tbl
