VERFAHREN UND EINRICHTUNG ZUM ORTEN EINES ERDSCHLUSSES EINES LEITERS IN EINEM DREHSTROMNETZ.

摘要

The earth fault location system uses two measuring signals (I1, U1) respectively representing the sum current (IO) and the voltage at the network star point (Mp, Mp'). The fault direction is determined from the phase difference of the transients in the measured signals caused by an earth fault. The stationary component (I2, U2) of at least one of the stationary components is reduced via a band blocking filter (BS1, BS2) before being supplied to an evaluation device (A) controlling an earth protection relay (K) and respective diodes (LED 1 LED 2) indicating the earth fault direction.