Analysis of Cable Fault Tester Finding Fault Points

The FR-8600 series cable fault tester developed by Yangzhou Fangrui Electronics mainly consists of a host, test cables, pulse generators, and external signal sensor receivers. The product is mainly applicable to all cables up to 35KV. Low-impedance faults are accurately tested. The cable fault location system uses different data sampling rates to provide fast, accurate technical specifications. Box-type structure, touch screen operation interface, all function keys are displayed on the screen visually, with preset wave speed, waveform storage function, for users to call observation and comparison with the screen, the test interface is simple and clear, the function keys are simple and clear, the measurement method Simple and quick. The traditional high-voltage flashover and low-voltage pulse method technology principles and high-frequency high-voltage data signal processing circuits can be used to operate directly through the touch screen.

The method of the instrument to find the fault point
 

1. Capacitance amperometry

During the operation of the cable, capacitance exists between the core and the core. The capacitance is evenly distributed. The capacitance is linearly proportional to the length of the cable. The capacitance current determination method is based on this principle. For cables Core wire breakage is very accurate.

2, sound measurement

Find out according to the sound of the faulty cable discharge. This method is more effective for high-voltage cable cores for insulation flashover discharge. The wire and cable testing equipment used in this method is a DC pressure testing machine. When looking up, place the pickup close to the ground and slowly move along the direction of the cable. When you hear the sound of “zigand and zirconia” discharge becomes louder, this is the point of failure.

3, bridge method

According to the proportional relationship between cable length and resistance. In this method, the error for the direct short-circuit or short-circuit point contact resistance between cable cores is less than 1Ω, and the error is generally not more than 3m. For faults with contact resistance greater than 1Ω at the fault point, the resistance can be reduced to 1Ω by increasing the voltage through burning. Below, measure again according to this method.

Dear Customer:

Thank you for your attention to our products. In addition to this product introduction, the company also has a solar junction box tester, insulation resistance tester, loop resistance tester, transformer DC resistance tester, grounding resistance tester, capacitance inductance tester, Wireless high-voltage nuclear phase meter, cable fault locator, tensile testing machine, DC high voltage generator, high current test equipment and other products, if you are interested in our products, welcome to inquire. Thank you!