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
Cable fault tester We can see its probably from the name, check that the cable equipment is less than it. It is a very intelligent product that detects the line's fault point. No matter what tool is used, it is necessary to note that the cable fault tester we can see the probably role from the name. Check that the cable equipment is less than it.
It is a very intelligent product that detects the line's fault point. No matter what tool, you should pay attention to some problems when you use it. We look at the cable fault tester today. Details of the cable fault tester: 1, can not just rely on the data obtained by the instrument to make judgments, but also need to take into account the actual situation, such as historical failure, and connector.
2. If the cable appearance is observed, the correct record after the installation of the cable is installed. 3, the exact location of the three-way joint, the direction of cable paths, in the underground relationship, the situation of a cable to another cable or joint and the exact position of the two different cross-sectional cables. When operating using a cable fault tester, the details must pay attention to the relationship to accurate problems, and can not completely rely entirely on the cable fault tester, some places still need to personally check it.
4, first to determine whether the cable fault is high or low-impedance or grounding, using different test methods according to this condition. It can be measured by second or three pulses to measure the fault distance. Compared with the traditional test method, the advancement of the second and third pulse methods is the simpler waveform in the high-pressure flashing method to simplify the simple low-pressure pulse short circuit. The fault waveform, so it is extremely simple to accurately calibrate the fault distance. 5. When looking for a path, add a signal to the cable, re-use the receiver to receive this signal, and take a pass along the path to the signal, it determines the path of the cable.
Accurately position according to the measured distance. When you hear the largest sound from the headset of the fixed point, it is to find the location of the fault point. Cause Analysis of Cable Fault Tester Cable Generation: 1. The cable is tidy.
Due to non-sealed or poor installation of the joint box or the terminal box structure, the metal sheath can be made of small holes or cracks may also be a metal sheath due to being injured or corroded by external objects or corrosion. 2, the insulating material of the cable is lost. The oil immersed paper insulated cable is laminated, or the outdoor head on the electric rod, due to the disparation of undulation, high and low drop, the insulating oil in the height is low, resulting in a decrease in the insulation performance of the high place cable, resulting in failure.
3, cable mechanical damage. Damage during installation, accidentally hit the cable when installing, the mechanical traction is too large and the cable, or the cable is excessively bending and damage the cable or damaged by external force. On the installation cable path or the cable path is carried out near the cable path or the cable near the cable. The cable is subject to direct external force damage or vibration or impact load of the vehicle causes the lead package of the underground cable; it is possible to be damage caused by natural phenomena. 4, design and production process, material defects.
The waterproofing of the intermediate joint and the end of the end is not carefully, the material is not properly selected, and the process is poor. It does not make the cable failure. The above is the precautions for cable fault testers, and interested friends have learned.
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