What are the reasons for the abnormal waveform display of the cable fault tester?

What is the reason why we occasionally experience unstable or incorrect waveforms during the use of cable fault testers? Today, let’s take everyone to understand the principles behind it.

The factors that affect the waveform of cable fault testers include:

① If the insulation layer material of the cable is oil-paper cable or pure cross-linked polyethylene material, the fault waveform is simple and clear; If it is polyvinyl chloride material and the wave propagation characteristics are poor due to the influence of additives, the fault waveform decays quickly and the reflection of the fault point is difficult to identify;

② Is the insulation resistance of cable faults less than 1000 ohms? When it is less than 1000 ohms, the reflection waveform of the fault point is relatively clear;

③ Does the pulse reflector have a comparison function? A pulse reflector with comparison displays both good and bad phase waveforms on the same screen, with the bifurcation point of the two waveforms being the location of the fault point;

④ Is there a T-branch cable in the tested cable. If there is, TDR partner assistance is required to apply a TDR partner’s disconnection signal to the far end of the tested main cable or branch cable, so that the waveform of the fault point transmission is separated from the far end of the branch cable.

ZC-700A cable fault tester is a new generation of portable cable fault testing instrument carefully designed and manufactured by our company based on user requirements and considering on-site use. It adheres to our consistent principle of high-tech, high-precision, and high-quality, and elevates the level of cable testing to a new level. The tester consists of three parts: flash testing, tracking, and positioning. It can be used to detect low resistance, high resistance, short circuit, open circuit, leakage faults, and flashover faults of various cables. It can accurately detect the fault location, cable length, and cable burial path of underground cables. It has the characteristics of accurate testing, high intelligence, wide adaptability, stable performance, and lightweight portability. The instrument adopts a Chinese character system with high-definition display and a user-friendly interface.

Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com