Method and apparatus for detection of short-circuits

Details Method and apparatus for detection of short-circuits Method and apparatus for detection of short-circuits

G - Physics

01

R

324/58.03

G01R 31/08 (2006.01) G01R 31/02 (2006.01) H02H 7/26 (2006.01)

Patent

CA 1056910

INVENTORS: OTTO LANZ, JIRI MASTNER and MICHAEL VITINS INVENTION: METHOD AND APPARATUS FOR DETECTION OF SHORT-CIRCUITS ABSTRACT OF THE DISCLOSURE A method of and apparatus for the detection of short-circuits on lines operated with voltages and currents containing an alternating component, by detecting the temporal progression of the voltage and current at a measurement location in the form of measure- ment voltages and measurement currents. From the measurement voltage and measurement current or from magnitudes derived therefrom there are formed traveling wave signals of the form: a(t) = k.(um + RW.im) and b(t) = k.(-um + Rw.im) wherein um represents the measurement voltage and im the measurement current or magnitudes derived therefrom, Rw an impedance factor and k a freely introducable proportion- ality factor. There is monitored the mutual phase position of at least one respective frequency component of the oppositely moving traveling wave signals as a magnitude characterizing the condition of the line.

255097

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