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–Cable Tester Manufacturer
Cable line fault tester high-voltage cable fault cause analysis cable line fault tester 1. Reasons made by manufacturers The reasons for manufacturers' manufacture are divided into three categories: cable body reasons, cable joint reasons, and cable grounding system reasons. 2. Reasons for construction quality First, there are many cases of failure of high-voltage cable systems due to construction factors, and there are several important reasons: First, the diameter of the site is relatively poor, and the environment and technical requirements for cables and cables are very high during the construction of the factory. High, and the construction site temperature, bottom moisture, and dust are not easy to control. Second, during the ground breaking process of the cable, it is inevitable that the surface of the insulation will pass through the small slip marks of the plucked hair, and the semi-conductive beans and sand on the sandpaper may also be put into the insulation. If the fire is in the atmosphere, the insulation will also absorb moisture, which will leave hidden dangers for long-term safe and sound turnover.
The third is that at the time of installation, the construction or craftsmanship of chess has not been strictly determined, and the subject matter that may be produced in large numbers has not been considered. Fourth, the completion acceptance requires the DC withstand voltage test, which leads to the insulation damage caused by the reverse electric field of the Qin Dynasty, the Qin Dynasty, and the Chu Dynasty. Fifth, due to poor sealing treatment.
The middle bottom must use a metal copper shell to increase the sealing structure of the PE or PVC insulation and anti-corrosion layer, and keep the lead seal tight during the construction on the spot, so that the sealing and anti-corrosion performance of the joint is effectively preserved. 3. Reasons for planning Breakdown caused by cable crushing caused by thermal expansion of the cable. When the load of the cross-linked cable is high, the core temperature rises, the cable rises slightly due to the heat, and the cable bears on the vertical surface of the bracket at the turn in the tunnel. The long-term heavy load operation of the cable has a large capacity, causing the vertical surface of the bracket to crush the outer surface of the cable. Sheath, metal sheath, squeeze into the cable insulation and cause cable breakdown.
High-voltage cable fault cause analysis cable line fault tester Shenzhen Noyafa Electronic Technology Co., Ltd.
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