What is the difference between low voltage pulse and multiple pulse of cable fault detector

As the technology of the cable fault detector is constantly updated, the positioning of the cable fault detector of the equipment is getting higher and higher. At present, there are two commonly used detection techniques for cable tester equipment, low-voltage pulse method and multiple pulse method. So what is the difference between the low voltage pulse and the multiple pulse of the cable fault detector?

Cable fault tester

In the actual working process of the cable fault detection test, the cable faults are generally high-resistance faults and low-resistance faults. The low-voltage pulse method and the flash method in the pulse method solve the low-resistance and high-resistance cable faults with high accuracy. , Not affected by artificial factors. So it has become the main application method of power cable fault detection test. The working principle of the power cable fault low-voltage pulse method is that a low-voltage pulse wave is injected into the cable test end, and the pulse wave propagates along the cable to the fault point and is reflected and then sent back to the cable fault tester. The time of the transmitted pulse wave and the reflected pulse wave are recorded together interval. Knowing the propagation speed of the pulse wave in the cable, the distance to the cable fault point can be calculated.

Cable fault tester

The principle of multiple pulse testing is developed on the basis of low-voltage pulse detection technology. In addition to having all the advantages of the secondary pulse method cable fault tester, the point is: the fault waveform obtained by the field test allows the operator to have more choices In order to obtain an ideal secondary pulse waveform, the delay time of the test pulse is no longer adjusted continuously during the test, which reduces the technical and experience requirements of the operator. Improve the accuracy of judgment on site failures. Anyone can easily and accurately interpret the waveform, calibrate the distance to the fault, and achieve the purpose of quickly and accurately testing the cable fault.