| 摘要 |
PROBLEM TO BE SOLVED: To provide a protective line element of a DC electric train track and a high-resistance ground fault detecting system which are not affected by insulation deterioration of a protective line and a lightning stroke against an electromotive line near an adjacent support column of the electric train track and endure a voltage due to the lightning stroke.SOLUTION: A protective line element 305A of a DC electric train track is a protective line element 305A used for causing a ground fault current from an electromotive line 150 for a protective line 100 on a high-resistance ground fault detecting system of a DC electric railway to flow, and includes a first varistor 305A-2, a diode 305A-1 constituting a parallel circuit with the first varistor 305A-2, and a second varistor 305A-3 connected in series with the parallel circuit. Therein, a terminal of the anode side of the diode 305A-1 is connected to the electromotive line 150 side and a terminal of the cathode side is connected to the protective line 100. |
