Research on reliability of copper clad aluminum cable

    In fact, as early as the 1960s, some European and American countries began to study and apply copper-clad aluminum materials, and the earliest developed conductor standards. Now the United States, Britain, Japan and other countries have taken copper-clad aluminum as the third generation conductor after copper and aluminum. In recent ten years, the copper-clad aluminum conductor has been widely used in China, mainly for large capacity signal transmission lines. The Ministry of information industry formulated the industry standard SJ / T11223-2000 for copper-clad aluminum conductor in 2000. Domestic production technology is becoming more and more mature, and has formed a batch. The application of copper-clad aluminum conductor in power cable has also been successful in recent years. Some famous power cable enterprises in Zhejiang Yueqing, Wuhan, Shanghai, Qingdao, Jiangsu, Henan, Hebei, Hunan and other provinces have established relevant parameter standards for copper-clad aluminum cable, which plays an important role in the popularization and use of copper-clad aluminum cable The role of the government.
   The fact also proves that the copper-clad aluminum cable has completely replaced the performance of copper cable in many engineering cases across the country. Based on the existing achievements at home and abroad, our company carried out research and test, and obtained a lot of data. We also tested the cross section of conductor, conductor in various harmful and corrosive solutions, welded joints, high temperature resistance and drawing annealing process, and tested its AC resistance, current carrying capacity, skin effect and proximity effect at high frequency, The conclusion is consistent with the research results abroad. It is further confirmed that copper-clad aluminum conductor and copper conductor have the following advantages when their DC resistance is the same (the cross-sectional area is about 28% larger than that of copper)
    (1) The index of thermal cycle between conductors and terminals is better than that of copper;
    (2) Its AC resistance and current carrying capacity are better than copper, so the line loss is lower than copper;
    (3) It has the same solderability as tin and copper;
    (4) Its contact resistance is the same as that of copper;
    (5) It is easy to connect and reliable;
    (6) Light weight and economical price;
    (7) Power on operation is as safe and reliable as copper wire;
Appendix: main foreign copper clad aluminum manufacturers and standard codes
    Copway company (GC), USA;UL1581-2001
    American TI company;ASTMB13566-2002
    British BICC company;IE4673-2000
    Japan electric wire Co., Ltd;CCAJ1240-1998