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–CCTV Tester
Anhui cable fault detection, meet your needs with high-quality services During the construction and maintenance of mechanical and electrical equipment installation projects, there will be cable faults caused by various reasons. Therefore, it is necessary to have applicable theories and methods to solve all kinds of faults. In this article, Anhui cable fault detection and high-quality services can meet your needs. During the construction and maintenance of mechanical and electrical equipment installation projects, you will face cable failures caused by various reasons. Fault. Therefore, it is necessary to have applicable theories and methods to solve all kinds of faults. This paper expounds the traditional detection methods. The fault point detection of cables generally has to go through three main steps: fault type diagnosis, fault point distance measurement, and precise point determination. .
The fault type diagnosis is mainly to determine the fault phase of the fault point of the cable, which is high-resistance grounding or low-resistance grounding, so that the tester can choose the appropriate detection method. The fault point distance measurement is also called pre-positioning. A test signal is applied to the faulty cable core wire or online measurement and analysis of the fault information are carried out to initially determine the distance of the fault and minimize the fault range to facilitate accurate point determination. Pre-positioning methods can generally be classified into two categories, namely classical methods, such as bridge method, etc.; modern methods, such as low-voltage pulse method, high-voltage flashover method, etc.
Precise point determination is based on the pre-positioning distance to accurately determine the actual location of the fault point. The precise point determination methods mainly include the acoustic determination point method, the induction fixed point method, the time difference fixed point method and the synchronous fixed point method.
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