Experience in both laboratory and practical situations in Finland, Sweden and Norway appears to confirm the advantages of 11/12 kV and 22/24 kV BLX covered overhead lines compared with conventional bare conductor (BLX is taken from the Norwegian 'Belagt Linesystem', or overhead line system, insulated with XLPE.) The line consists of a stranded, alloyed aluminium conductor with cross-section from 50 mm/sup 2/ to 150 mm/sup 2/, covered with a cross-linked and UV resistant polymer. The conductor is grease filled during the manufacturing process to make the covered cable watertight and corrosion proof. The development has taken off very quickly in Norway and Sweden since ABB Norsk Kabel launched BLX in 1989. The author discusses the construction of the lines, lightning protection, and the benefits of the BLX overhead lines.
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机译：芬兰，瑞典和挪威在实验室和实际环境中的经验似乎证实了11/12 kV和22/24 kV BLX覆盖架空线与传统裸导体相比的优势（BLX来自挪威的“贝拉格特线系统”，或架空线系统由XLPE绝缘。）该线由绞合合金铝导体组成，其横截面积为50 mm / sup 2 /至150 mm / sup 2 /，并覆盖有交联的抗紫外线聚合物。在制造过程中，导体要注满油脂，以使被覆电缆防水和防腐蚀。自1989年ABB诺斯克·卡贝尔（ABB Norsk Kabel）推出BLX以来，挪威和瑞典的发展迅速。作者讨论了线路的构造，防雷技术以及BLX架空线的好处。
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