Author: Noyafa–Cable Tester Manufacturer
The method of locating cable faults is introduced in detail. The occurrence of cable faults occurs with the laying and application of cables. The positioning of cable faults is gradually difficult to locate with different cable laying methods. Among them, the positioning method of bridge, tunnel, and trench in open laying method will be introduced in detail. The occurrence of cable fault will occur with the laying and application of the cable. The positioning of cable fault will gradually increase with the different cable laying methods. Among them, the location and search of bridges, tunnels, and trenches are relatively simple, and the direct burial method is the most difficult.
When the nature of the fault is simple, use a special cable fault locating device. It can be located within dozens of minutes. When the fault is special, it often takes 4-5 days or even longer to locate the fault. When using the echo method to locate the cable fault, sometimes the faulty phase and wiring method are often transported. It will turn complex faults into simple faults, quickly confirm the fault location, and gain time for on-site line repairs, which has important implications for power supply applications. Low-voltage cables are generally multi-core cables. After being laid, there is a fault in continuous use, and there are generally two-core and multi-core short-circuit faults between phases or relative to ground.
Sometimes when it is detected that the fault waveform collected by a certain core is not ideal, it can be considered to switch the wiring to other faulty cores for fault waveform detection, which often presents unexpected effects. The collected and detected waveforms will become more typical and regular, so the specific orientation of the faulty point of the cable can be quickly confirmed. During the long-term on-site measurement of the cable customer, it was found that the small-section copper core directly buried power cable (35mm2 and After the failure of the aluminum core cable) and the aluminum core cable, it may be accompanied by a short circuit and a disconnection failure during on-site inspection.
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