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
Author: Noyafa–CCTV Tester
How to use the cable fault tester to troubleshoot as we all know, the cable fault tester is used to troubleshoot, but how to use it to troubleshoot? I believe that most people are novices, and they don’t know much about this aspect. The following will tell you how to use the cable fault tester to troubleshoot faults. As we all know, the cable fault tester is used to troubleshoot faults, but how to use it to troubleshoot What about troubleshooting? I believe most people are“noob“, I don't know much about this aspect. Let me explain to you how the cable fault tester is used to troubleshoot the fault. 1. To do the cable insulation resistance test, carry out the full-length test of the faulty cable, and the test waveforms of the second and above are basically the same. 2. Insulation resistance data analysis, if the customer's on-site information on the joint position is unclear, it can only be used as a reference for subsequent tests. 3. Determine the fault point range and fault location, and use the high-voltage flash-over method to test the process: after the pulse method test is completed, use the flash-over method to test. According to the fault insulation, first use the A-phase test with low insulation resistance, and the capacitor is 2 microfarads. 20KV, impulse voltage 15KV, test.
The test waveform of the high-voltage flash-flash method is the secondary breakdown discharge waveform of the fault point, and the breakdown discharge waveform. Then test the waveform according to the flash-over method. Although the fault point is difficult to break down and discharge, the second breakdown waveform can determine the fault distance, even if the rough test is completed. The next step is to pinpoint the exact point of failure.
The test site, within the range of the rough measurement distance, happens to be the coal storage yard, and the fixed-point test environment is relatively poor. The fixed point can only be carried out on the coal pile. Through careful work, the fault point was determined by the acoustic and magnetic synchronization fixed point instrument on the rock pile. 4. For the withstand voltage test of the cable, use series resonance to conduct a withstand voltage test on the cable that has been repaired, and the withstand voltage time shall not be less than one hour.
The occurrence of smoke, outgassing, coke odor, arc flash discharge sound, etc. within the specified time indicates that the insulation is defective. If there is no out-of-phase during the boosting process, it indicates that the pressure resistance performance is good and can be put into use normally.
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