Author: Noyafa–POE Tester
Cable fault test The operation should be carried out according to the following 3-step procedure! When using the cable fault tester to test the cable fault, the manufacturer of the cable fault tester should follow the following procedures: The manufacturer of the cable fault tester 1. The multimeter, the shaker or the cable fault test operation should follow the following 3-step procedure. conduct! When using the cable fault tester to test the cable fault, the manufacturer of the cable fault tester should follow the following procedures: 1. The multimeter, the shaker or the cable pre-test results to determine the nature of the cable fault. 2. Select the appropriate test method according to the nature of the cable fault: the pulse method is best for low-resistance faults and open-circuit faults. Of course, the flashover method can also be used for low-resistance faults. Leakage high resistance faults are best to use the flashover method (Rush L method), and some leaky high resistance faults can also use the direct flash method, but usually do not do this, it is best to use the direct flash method for flashover high resistance faults. You can also use both methods to measure and compare with each other to improve the accuracy of judgment.
3. Select the working ground point, and draw two ground wires from the selected ground point, one is connected to the ground of the instrument, and the other is connected to the ground of the high-voltage equipment. The selection principle of the working ground wire of the cable fault tester manufacturer is to ensure that the test phase and it form a closed loop, so that the instrument can obtain the correct test waveform. It should also be noted that the working ground wire must be connected with the system ground, and the cable fault tester makes the human, instrument ground, high-voltage equipment ground and the tested cable ground in the same place.
To ensure personal safety and equipment integrity. If the cable is faulty between phases, the working ground wire must be one of the phase wires, and the phase wire used as the ground wire must be connected to the system ground. For cables with lead-free bushings, the vast majority of faults are discharges to earth or space during high-voltage flashover tests.
Cable fault tester manufacturer Shenzhen Noyafa Electronic Technology Co., Ltd.
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