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
Power cable fault tester traveling wave method Introduction of cable fault tester manufacturer Shenzhen Noyafa touch screen cable fault tester mainframe uses embedded computer for measurement control and data processing, the entire operation is carried out under Windows interface, 10-inch touch power cable fault test The traveling wave method of the instrument is introduced. The touch screen cable fault tester produced by Shenzhen Noyafa, the manufacturer of the cable fault tester, uses an embedded computer for measurement control and data processing. The entire operation is carried out under the Windows interface. The 10-inch touch screen has a large display area and the measurement waveform is intuitive. It is easy to operate and use, with a universal USB interface, and a large amount of measurement data can be stored by using the hard disk. Because the embedded computer is used, the reliability of the system is improved, the maintenance is accurate, comparative analysis, the test accuracy is improved, and the error is reduced. In principle, power cable fault location can be divided into two categories: traveling wave method and impedance method.
Shenzhen Noyafa introduces the traveling wave method of the power cable fault tester: the traveling wave fault location of the cable fault tester manufacturer is based on the voltage and current traveling waves have a fixed propagation speed on the line. The wave speed in the power cable is 150m/s～220m/ s) With this feature, a traveling wave fault location method is proposed. The traveling wave method of distance measurement uses the time that the traveling wave travels back and forth between the measurement point and the fault point, and the distance can be obtained after a simple operation. The first type of acquisition and identification of traveling wave signals is the method using voltage traveling wave signals, and the second category is the ranging method using current traveling wave signals.
At present, only the current traveling wave is basically used for fault location in China. The reason is that the voltage traveling wave signal is not easy to obtain. When there are many outgoing lines on the bus, the voltage signal is relatively weak, but the current signal is strong, and the current traveling wave signal is relatively easy to obtain. . In engineering applications, the methods corresponding to the above two types of methods include low-voltage pulse reflection method, pulse voltage method and pulse current method. Shenzhen Noyafa, a cable fault tester manufacturer, is a source enterprise specializing in the production of power testing equipment. The company has won unanimous praise from the market and customers with its good credit and high-quality products.
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