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 Tester
How to determine the cable fault Cable fault tester manufacturer 1. What causes the cable fault: The cable fault refers to the power failure of the power grid cable line due to insulation breakdown or wire burnout during the operation of the power grid. How to determine the cable fault Cable fault tester manufacturer 1. What causes the cable fault: The cable fault refers to the failure of the power grid cable line due to insulation breakdown or wire burnout during the operation of the power grid. . 2. What are the causes of cable faults: The most direct cause of common cable faults is breakdown due to the reduction of insulation. The factors that lead to the reduction of insulation mainly include external force damage, insulation damp, chemical corrosion, long-term overload operation, cable joint failure, temperature and environment, natural aging of the cable itself and other reasons.
3. Various types of cable faults: According to the nature of the fault, cable faults can be divided into low-resistance grounding or short-circuit faults, high-resistance grounding or short-circuit faults, wire-break faults, wire-break and grounding faults and flashover faults. Combining the "Common Types of Cable Faults", the cable fault judgment can be carried out, which has guiding significance for the subsequent cable fault testing and processing. 4. How to use the cable fault tester to detect cable faults: First, fully communicate with the technicians who manage the cables to understand what causes the cable faults. The failure of the outer sheath of the cable caused by the insulation drop of the layer.
5. Then judge the type of fault, you can use an insulation resistance meter to measure the insulation resistance between the outer sheath and the ground, so as to judge the type of resistance. For example, if the insulation resistance is measured to be 1.2 megohms, it can be judged as a high resistance fault. Different test methods are used to test it for different fault types.
For example, for the high resistance fault mentioned above, the flashover method can be used to locate the fault location, and the approximate distance of the fault point can be judged by the discharge waveform displayed by the cable fault tester, and then the receiver can be used to accurately determine the point. The specific analysis and discussion can be carried out in conjunction with the "Discussion on the Testing Method of Cable Fault Points". 6. Summary: As the level of cable fault testing has improved, there are various types of cable faults. We need to adopt different testing methods for different types of cable faults, using new technologies, new equipment and new functions developed on the equipment to achieve Accurate measurement of fault points, control and reduce measurement errors, and more efficient fault detection.
The newly developed technology and equipment can undoubtedly help us achieve this goal faster. Shenzhen Noyafa.
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