Arrangement for establishing the location of phase-to-phase or phase-to-earth faults on a loop of a polyphase electrical powerline utilizing only voltage and current magnitudes available at a measuring point on the loop

摘要: A process for measuring the distance of a fault between phases and earth an electric power transport line where one effects, at moment when faulty current takes zero value, ratio voltage loop point reference representing drop equivalent to in given length question. device or comprising means elaborating detecting passes by remembering value this said voltage, effecting these two voltages.