DETECTION DIRECTIONNELLE DE DEFAUT TERRE RESISTANT ET DE RUPTURE DE CONDUCTEUR MOYENNE TENSION

摘要

The device (100) has reception units to receive signals representing voltages of low voltage phase conductors (A-C) of a low-voltage outgoing line (15). An obtaining unit (110) obtains signals representing phase voltages (VA-VC) from the received voltage signals. A determination unit (122) determines a symmetrical component of a reverse voltage (Vi) of the outgoing line. A comparison unit (126) compares the reverse voltage with a triggering threshold. Independent claims are also included for the following: (1) a system for detecting a resistive fault in a medium-voltage network (2) a method for detecting a resistive earth fault in a medium-voltage network (3) method for detecting and locating a resistive earth fault in a medium-voltage network.