Method to indicate direction of earth short circuit current; involves comparing phase angle of this current with voltage using transmitter with annular iron yoke to transmit true angle 50 Hz signal of earth short circuit current

摘要

The method involves comparing the phase angle of the earth short circuit current and voltage with each other. A conversion transmitter is used, which has an annular iron yoke, which transmits a true angle 50 Hz signal of the earth short circuit current. The voltages of low voltage network are related, so that an earth shorting direction can also be established in stations, without conventional current and voltage converters.