Author: Noyafa–POE Tester
Cable fault test - the cause of power cable faults Cable fault tester manufacturers , cable identification instrument manufacturers With the development and expansion of cities and the transformation of urban power grids, power cables have become more and more widely used. But on the other hand, because the cable is in the cable fault test - the cause of the power cable fault application. But on the other hand, because the cable is underground, it is difficult to find the location of the fault point, which brings great difficulties to the safe and stable operation of the power grid and the reliability of the power supply.
Cable fault tester, also known as cable fault comprehensive tester, buried cable fault tester, power cable fault tester, cable fault detector, high-voltage cable fault tester, cable fault tester, fixed point tester, path tester, cable fault routing Instrument, cable fault tracer, portable cable fault location system, cable fault flash tester, cable fault spotting instrument, cable routing instrument, street lamp cable fault tester. Shenzhen Noyafa will introduce the causes of power cable faults to you: (1) , Aging and deterioration of the insulating layer: The insulated cable has been exposed to the wind and the sun for a long time, and it has aged under the action of electricity, and it is also subjected to chemical, thermal and mechanical actions accompanying the action of electricity, so that the medium undergoes physical and chemical changes. The insulating properties of the medium decrease. (2) Overheating: The free air gap inside the cable insulation causes local overheating and carbonization of the insulation. In addition, the cable is overloaded and overheated. Cables installed in cable-intensive areas, cable trenches and cable tunnels and other places with poor ventilation, cables passing through the drying pipe and the parts of the cables close to the heat pipe, etc., will be insulated due to their overheating. Accelerated damage.
(3) Mechanical damage: damage caused by external forces such as excavation. (4) Corrosion of the sheath: Due to the influence of acid-base and stray current in the soil, the lead or aluminum cladding of the buried cable will be corroded and damaged. (5) Insulation damp: the intermediate joint or terminal head is not sealed in structure or the installation quality is not good, which causes the insulation to be damp.
(6) Overvoltage: Overvoltage mainly refers to atmospheric overvoltage and internal overvoltage. Many outdoor terminal joint failures are caused by atmospheric overvoltage, and the defects of the cable itself can also lead to failures in the case of atmospheric overvoltage. (7) Material defects: problems in cable manufacturing, defects in the manufacture of cable accessories, and poor maintenance and management of insulating materials may cause cables to fail. Shenzhen Noyafa is a source enterprise specializing in the production of power testing equipment. The company has won unanimous praise from the market and customers with its good credit and high-quality products.
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