Ground fault point indicator, ground fault point system, ground fault point method

摘要

In the power distribution line including insulated wire and power cable, ground fault points in the section of the insulated wire except the power cable are accurately measured.Information regarding the zero phase current and the zero phase voltage output from the first measuring terminal installed at a predetermined position opposite to the side where the power cable is connected to the first insulated wire corresponding to the present time, andZero phase current and zero phase voltage output from the second measurement terminal installed at the connection point of the first insulated wire and the power cable to the current time and zero phase current and zero phase output from the third measurement terminal installed at the connection point of the second insulated wire and the power cable Information associated with the current timeThe zero phase current and the zero phase voltage output from the fourth measurement terminal installed at a predetermined position on the opposite side to the side where the power cable of the second insulated wire is connected to the present time is obtained as the information corresponding to the present time.The ground hit point is determined by correcting the surge arrival time of the first or fourth measurement terminal.Diagram