FIELD: physics.
SUBSTANCE: for determining faulty line and point of fault in circuit with isolated neutral, zero sequence current of previous state of every line is memorised in intermittent transient phase short-circuiting in normal state by power supply. Said zero sequence current of every line is defined and compared to line relevant setting. In case current reverses its direction at one of connections and exceeds said setting, line is considered faulty and is t be disconnected. Line faulty point is determined by formula enclosed herewith.
EFFECT: possibility to define zero sequence current of previous state of every line.
2 dwg
