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–POE checker
The common reasons for the failure of these power cables do you know which cable failure tester manufacturers Common causes of power cable faults Do you know which cable fault tester manufacturers , it will also cause economic losses to enterprises, and in severe cases, it will cause a chain of destructive reactions. Therefore, how to quickly troubleshoot problems, solve failures, and prevent failures has become a major concern in the power industry. So what are the common reasons for power cable failure? At present, there are many reasons for the failure of cables. Now the common main reasons are summarized as follows: Mechanical damage Many faults are caused by mechanical damage caused by careless cable installation or mechanical damage caused by construction close to the cable after installation. . If the damage is minor, it can take months or even years for the damaged area to develop insulation failure.
Cause the damaged part to completely collapse and cause a failure. Electrical corrosion of the cable sheath If the power cable is buried under the ground with a strong electric field (such as large-scale traffic, near the electric locomotive track), the phenomenon of lead-pack corrosion of the cable sheath often occurs, resulting in moisture intrusion and insulation damage. Chemically corroded cables are buried in areas with acid and alkali operations or near gas stations with benzene vapor, which often cause the cable armor and lead wrap to be corroded in large areas and long distances.
The phenomenon of ground subsidence often occurs when cables pass through highways, railways and tall buildings. Due to the subsidence of the ground, the cables are subjected to vertical force and deformation, resulting in the rupture or even breakage of the cable armor, lead packs, and various types of faults. Loss of cable insulation When the cable is laid, the trench is uneven, or the outdoor head is on the pole. Due to the undulations and height differences of the cable, the cable insulating oil in the high place flows to the low place, which reduces the insulation of the high place cable and causes the failure. occur. Long-term overload operation Due to overload operation, the temperature of the cable will increase accordingly, especially in hot summer, the temperature rise of the cable often causes the weak point of the cable and the joint to be broken down first.
This is the reason for the high rate of cable failures in summer. To sum up, the quality of the power cable directly affects the operation safety of the line. Once the line cannot operate safely and stably, the life and economic losses caused by its failure are unpredictable. Therefore, our electric power workers must fundamentally To prevent the occurrence of cable faults, minimize cable accidents, start from the subtle, and strive to achieve the goal of safe and stable power supply. Shenzhen Noyafa Electronic Technology Co., Ltd.
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