Cable fault location system? Wuhan UHV specializes in producing cable fault location systems, with a wide range of product options. When looking for a cable fault location system, choose Wuhan UHV.         

As is well known, whether it is a high resistance fault or the precise positioning of the cable at the end, it cannot be separated from the dedicated voltage boosting device for cable fault detection. In the past, test transformers, operation boxes, and pulse capacitors were used for voltage boosting, which had the disadvantages of being bulky and complex to connect. Huatian Power took the lead in developing an integrated cable fault location system, which solved this problem in one fell swoop and made cable fault detection lightweight. This revolutionary improvement has been highly praised in the industry.         

The cable fault location system is a comprehensive cable fault detection instrument. It can test high resistance flashover faults, high and low resistance grounding, short circuits, cable breakage, poor contact and other faults of cables. If equipped with an acoustic fixed-point instrument, it can accurately determine the precise location of the fault point. Suitable for testing various models and voltage levels of power cables and communication cables.

Detection principle of cable fault location system

The testing of cable faults is based on the principle of reverse impedance caused by uneven line impedance during the transmission of radio waves in transmission lines. According to transmission line theory, each line has its own characteristic impedance Zc, which is determined by the structure of the line and is independent of its length. On a uniform transmission line, the input impedance at any point is equal to the characteristic impedance. If the load connected to the terminal is equal to the characteristic impedance, the current wave or voltage wave sent by the line is transmitted along the line and is fully absorbed by the load at the terminal without reverse direction. When the impedance at any point on the line is not equal to Zc, the radio wave will undergo total or partial reflection at that point. The magnitude and polarity of reflection can be represented by the reflection coefficient P, and its relationship is as follows:

In the formula, Z c is the characteristic impedance of the transmission line, and Z o is the impedance of the reflection point of the transmission line

(1) When there is no fault in the circuit, Z o ＝Z c ，P＝0， No reflection.  

(2) When a disconnection fault occurs in the line, Z o ＝∞，P＝1， The circuit undergoes total reflection, and the reflected wave has the same polarity as the incident wave. 

(3) When a short circuit occurs in the circuit, Z o ＝1，P＝－1， The circuit undergoes negative total reflection, and the reflected wave is opposite in phase to the incident wave.

The cable fault location system is a powerful comprehensive cable fault testing system developed by Wuhan UHV by drawing on the strengths of 20 domestic and foreign cable fault testers, with high-speed data acquisition and advanced data processing capabilities. The fault location system is based on an industrial grade embedded computer platform system, using the most advanced network and digital communication technology today, greatly improving the functionality and testing accuracy of the instrument.