| 摘要 |
PROBLEM TO BE SOLVED: To obtain a ground failure point locating device for a high-voltage signal distribution line which can surely locate a grounded point, even for a ground failure which can be restored when the current is cut off or even if the ground failure is temporary. SOLUTION: A device has a transmission side transformer T1, whose center tap T0 is grounded, a measuring unit M which measures the instantaneous values of the respective waveforms of voltages VsR and VsT between transmission ends of respective distribution lines R and T and the ground, a failure current flowing into the center tap Tx0 from a ground point and voltages VrR and VrT between reception ends of the respective distribution lines R and T and the ground, ring buffers 2a and 2b in which the measured instantaneous values of the respective waveforms are recorded as waveform data with synchronized timing and a computer 4, which reads out the wavelength data of the measured values of a difference VsR-VsT between the transmission end to ground voltages, a difference VrR-VrT between the reception end to ground voltages and a failure current ig, when a ground failure occurs and calculates the reactance value and a distance Lf of a distribution line R from a transmission end Rs and a ground failure point P.
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