Reasons and precautions for unqualified new energy wire and cable

Author: EVCOME-EV Chargers Manufacturers

New energy wire and cable is a large category of electrical products used to transmit electricity, transmit information and realize electromagnetic energy conversion. If a large number of unqualified products are found during the spot check, these inferior products have laid many hidden dangers for the normal operation of the power system. Let me analyze the reasons and precautions for the unqualified new energy wire and cable. 1. Unqualified new energy wire and cable marks are the main way for new energy wire and cable to identify basic product information. According to the standard, the main content of the mark is: the product model, specification, standard number, factory name, place of origin, etc. within a certain mark range. When the sign is unqualified, it will cause the construction personnel to make identification errors, and in severe cases, it may cause electrical accidents. 2. The main problem of the structural size of the new energy wire and cable with unqualified structural size is the thickness of the sheath and the thickness of the insulation. When the sheath and insulation thickness of the cable are not up to standard, it will seriously reduce the resistance strength of the new energy wire and cable and shorten the service life of the new energy wire and cable. In severe cases, it can lead to the breakdown of new energy wires and cables, and the insulation (sheath) layer cannot play a normal protective role, resulting in electrical short circuits and fires. 3. New energy wires and cables with qualified tensile strength and elongation before sheath insulation aging. The tensile strength and elongation of the insulating sheath before aging are unqualified, which directly greatly shortens the service life of the new energy wire and cable, and the insulating layer is easy to break during the construction process or in a high-temperature environment with long-term electrification, resulting in the exposed conductor. There is a risk of electric shock and short circuit. The main reasons for its failure are firstly the use of recycled materials to reduce product costs, and secondly, small enterprises that do not have production qualifications. 4. The conductor resistance of wires with unqualified conductor resistance is mainly an important indicator for evaluating whether the conductor material and cross-section of new energy wires and cables meet the requirements. When the conductor resistance exceeds the standard, the loss when the current passes through the line increases, which aggravates the heating of the new energy wire and cable. The main reason for unqualified conductor resistance is that in order to reduce costs, companies will shrink copper, which accounts for 80% of raw material costs. Either reduce the cross-sectional area of ​​the conductor, or use recycled copper with too many impurities, resulting in a serious excess of the conductor resistance of the new energy wire and cable. In addition to being prone to fire during use, it will also accelerate the aging of the insulating layer wrapped around the wire. Things consumers should pay attention to in the process of purchasing new energy wires and cables First, observe the appearance of the wires. The insulation (sheath) layer of qualified products is soft, tough, and stretchable, and the surface layer is tight, smooth, and has no rough feeling. If the plastic wrapping the wires peels off easily, there is a problem of insufficient plastic strength. Second, observe the cross-section of the wire. The surface of the copper core of the qualified product should have a metallic luster, and the blackened copper indicates that it has been oxidized. Finally, pay attention to check the quality certificate when purchasing wires. If the quality of the wire is qualified, then the quality of the wire should also be inspected, and there will be no major problems. .


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