Cables are the main carriers of power transmission, and their quality is directly related to the stability and safety of the power system. Therefore, how to judge the fault of the cable is a very important part of power engineering. The following will be taken from the following.
The next few aspects introduce how to judge the cable *** bad.
1. Visual inspection.
First of all, the quality of the cable can be judged by looking at its appearance. The appearance of a high-quality cable should be smooth and neat, with no visible scratches, breakage, or deformation. At the same time, the identification of the cable should be clear and complete, including the manufacturer, model, specifications and other information. If there is an obvious problem with the appearance of the cable, such as breakage, deformation, or blurred marking, then it is likely to be an inferior product and should be avoided.
2. Conductor material inspection.
The conductor is the core part of the cable, and its quality directly affects the performance of the cable. The conductor of a high-quality cable should be made of high-purity copper or aluminum material, which has excellent electrical conductivity and mechanical properties. The quality of the conductor can be judged by looking at its color, gloss, and feel. The color of a good quality conductor should be uniform, shiny, soft and elastic to the touch. If the conductor has problems such as uneven color, poor gloss, or hard feel, it is likely to be an inferior product.
3. Insulation layer inspection.
The insulation layer is an important part of the cable, and its main role is to protect the conductor and transmit the signal. The insulation layer of high-quality cable should be made of high-quality insulating material, which has excellent insulation properties and mechanical properties. The quality of the insulation can be judged by observing the thickness, uniformity, and tensile strength of the insulation. The thickness of a high-quality insulation layer should be uniform, free of bubbles or impurities, and have high tensile strength. If the insulation has problems such as uneven thickness, bubbles, or impurities, it is likely to be an inferior product.
Fourth, the structure size inspection.
The size of the structure is one of the important indicators to judge the quality of the cable. The structural dimensions of high-quality cables should conform to national standards and specifications, with stability and reliability. The quality of the cable can be judged by measuring its structural dimensions, including the outer diameter, inner diameter, insulation thickness, etc. If there is a deviation in the dimensions of the structure or does not meet the requirements of the specification, then it is likely to be an inferior product.
5. Performance test.
Performance testing is one of the key links to judge the quality of the cable. The performance of the cable can be checked to meet the requirements by carrying out withstand voltage test, insulation resistance test, conductivity test and other items. If the performance test results do not meet the requirements, then it is likely to be an inferior product.
To sum up, judging that the cable is bad needs to be checked and tested from many aspects. When purchasing and using cables, you should choose products from regular manufacturers and brands, and install and use them in strict accordance with the requirements of the specifications. If the cable is found to have quality problems, it should be replaced and disposed of in time to avoid safety accidents.