NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–POE checker
How to use the cable fault tester to detect the fault point? It is very important to master these points. Cable fault tester manufacturers In the cable fault detection, the efficiency of cable fault detection is often affected by some uncertain factors in the field. In order to improve the cable fault, how to use the cable fault tester to detect the fault point? It is very important to master these points. In the cable fault detection, the cable fault tester manufacturers often affect the efficiency of cable fault detection due to some uncertain factors on the site. In order to improve the efficiency of cable fault detection, the following points must be done! Identify the faulty cable information to find out the cause of the fault and the basic situation of the cable, such as whether it is a fault in operation or a fault in pre-testing, whether it is a new cable or a cable with a long running time, the approximate length of the cable, whether there is a connector in the middle of the cable, the previous cable Have there been any failures, whether the cable is directly buried or laid in a cable trench, and the type of cable, etc.
Disconnect the faulty cable power supply The cable fault tester manufacturer must make sure that both ends of the cable must be disconnected from other lines to ensure that the cable has no power and the surrounding environment of the cable is in a safe state. Before the cable is tested, the tester must pay attention that each time before connecting the cable, connect each phase wire of the cable to the ground with a short-circuit wire for discharge. When discharging, one end of the short-circuit wire must be grounded first, and the other end of the cable must be connected to each phase wire of the cable for discharge. For other electrical appliances, such as capacitors, test transformers, etc., pay attention to discharge before wiring and removing connecting wires, and then wiring.
In short, to form an operating habit, do not be afraid of trouble, before each operation, pay attention to whether the electrical appliance is connected to the circuit, and discharge before operating. When the cable fault tester manufacturer roughly measures the distance between the fault points, first use the low-voltage pulse function of the tester to test the full length of each phase of the cable separately to see if the test waveforms are consistent during the three-phase armoring test. For most high-impedance faults, the test waveforms for each phase are consistent.
For low-resistance faults and high-resistance faults with open-phase faults, the test waveform of the faulty phase is inconsistent with the full length of the tested cable, so that the fault distance can be directly tested with low-voltage pulses. In the cable fault detection, only doing these tasks can not only improve the detection efficiency, but also the accuracy of the cable fault detection will achieve a multiplier effect. Cable fault tester manufacturer Shenzhen Noyafa Electronic Technology Co., Ltd.
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