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–Noyafa Cable Tester
How to use the cable fault tester It is convenient and accurate to use the cable fault tester without excavating the soil Special equipment for corrosion damage points. It can easily and accurately find out the direction, depth, breaking point, short circuit point, leakage corrosion and damage point of the insulation layer of the buried cable without excavating the soil, so that the ground surface of the entire line can be avoided repeatedly. It is a reliable detection instrument for communication, electric power, factories and mines, water and electricity, property management and other departments to ensure the construction quality inspection and fault point inspection of buried cables.
Cable fault tester manufacturers The cable fault tester is used to detect cable faults. The types of instruments and instrument models have increased greatly. Now in the domestic cable fault test instrument market, there are many types of instruments and instrument names supplied, except for common cable fault testers. , Direct buried cable fault tester, street lamp cable fault tester, medium and low voltage cable detector, cable ground fault tester, mine cable fault tester and so on have appeared on the market one after another. With the large number of applications of cables in all walks of life in recent years. For users who have never used a cable fault tester, in the face of numerous cable test instrument names and instrument models, what kind of instrument to choose is also a difficult problem.
The ultimate purpose of any cable fault test is to find the point of failure, but as far as the testing process is concerned, it is generally divided into three steps: one is a rough measurement of the fault distance; the other is to find the faulty cable buried. The third is to locate the fault point. Of course, in the actual test, the three steps are flexibly used according to the situation on site. In the 1970s and 1980s, the flash test method was generally used for cable fault testing, and the principle was the pulse reflection method (also called the radar method).
The instruments used are mainly electronic tubes and transistor circuits, which are bulky. The display used has successively oscilloscope tube type flash tester, storage oscilloscope tube type flash tester and so on. After the 1990s, with the widespread application of computer technology, the intelligent cable fault flashover tester (flash tester) has been put into use, and the test principle used is still the pulse reflection method.
The adopted flash tester is generally controlled by the single chip circuit from the picture tube display to the liquid crystal display, so that the rough detection of cable faults has entered a new realm. Since the cable fault tester manufacturers have buried cables, the detection of cable faults has become a problem that must be solved. The initial rough measurement of cable faults was carried out using the bridge balance test principle. At that time, resistance bridges, capacitor bridges, low-voltage bridges, and high-voltage bridges were used.
Using the bridge principle to test the cable fault distance was a commonly used method in the 1960s and 1970s. After the 2000s, instruments using the bridge test principle continued to be used and developed. After the use of computer technology, there are now more intelligent bridge testers (such as high-voltage digital bridges). The intelligent flash tester using the pulse reflection method (also called the impulse flash method) is currently the most widely used and the largest cable fault rough test instrument in the market.
In some power supply departments, cable fault tester manufacturers regard the use of cable fault testers as a skill that must be mastered in the examination of cable testers. Due to the long application time of this type of instrument, there are many types of training materials and monographs on the use knowledge and experience of this type, which is helpful for users to grasp the use skills of the instrument in time. Shenzhen Noyafa Electronic Technology Co., Ltd.
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