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
The use steps of the cable fault tester The detection of the cable fault tester generally goes through three steps of diagnosis, distance measurement and fixed point. 1. Diagnosis of cable fault properties Diagnosis of cable fault properties, that is, to determine the type and severity of the fault, so as to facilitate the use of the cable fault tester. The detection of the cable fault tester generally goes through three steps of diagnosis, distance measurement, and fixed point. . 1. Diagnosis of the nature of cable faults Diagnosis of the nature of cable faults, that is, to determine the type and severity of the fault, so that the tester can prescribe the right medicine and select the appropriate cable fault location and fixed-point method.
2. Cable fault location Cable fault location, also known as rough measurement, uses an instrument at one end of the cable to determine the fault distance. The commonly used methods of fault location in the field include the classical bridge method and the modern traveling wave method. Mainly used for cable fault distance finder. 3. Cable fault fixed point Cable fault fixed point, also known as precise measurement, that is, according to the fault location results, according to the path direction of the cable, find the general orientation of the fault point, in a small range, use a high-voltage signal generator to utilize Acoustic discharge method or other methods to determine the exact location of the fault point.
Mainly used in digital power cable fault locator Generally speaking, successful cable fault detection must go through the above three steps, otherwise the haste will not be achieved. For example, it is very difficult to detect the discharge sound at the fault point along a long cable path (may be several kilometers long) by using the discharge sound measurement method without fault location. If the distance of the cable fault is known, and a general orientation is determined, it is much easier to move the fixed-point instrument back and forth within a small range (about 10 meters) to detect the discharge sound at the fault point of the cable.
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