Author: Noyafa–CCTV Tester
DC high voltage flashover test method in cable fault tester The DC high voltage flashover test method in cable fault tester (referred to as direct flashover method) is mainly used for flashover high resistance faults, and can also test some leakage with high resistance value Sexual failure. The DC high voltage flashover test method in the cable fault tester for the preparer The DC high voltage flashover test method in the cable fault tester (referred to as the direct flashover method) is mainly used for flashover high resistance faults, and can also test some high resistance values. leakage failure. Preparation work: The basic test principle of the DC high voltage flashover method is to use external equipment to apply a DC negative high voltage to the faulty cable. When the fault point cannot withstand such a high voltage, a flashover arc will be generated. Test this point of failure.
First, connect the high-voltage signal generator with the cable to be tested according to the wiring method of the flash-over method, and couple the coupler of the cable fault distance finder with the test ground of the high-voltage signal generator, and open the cable fault distance finder to adjust the After testing the range and gain, press the test button and wait for the trigger. Then turn on the high-voltage signal generator, select DC in the mode, then press the high-voltage switch, turn the pressure regulating knob, and slowly increase the voltage until the fault taps through and discharges. At this time, the pulse current waveform will appear on the screen of . After analyzing the waveform, the distance to the fault point is measured.
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