引言铝—镁—硅合金输电导线,自本世纪二十年代问世以来,相继被世界各国所采用。该合金导线与铝导线相比,电阻率仅增加6～8％,但强度却增大一倍以上;特别是该合金导线的弧垂特性(导线拉断力与单位长度的重量比)较好,比铝绞线约高一倍,比常用的轻型钢芯铝绞线高40％以上。使用在输电线路上,可降低杆塔高度和放大档距,从而可以节约大量的 Introduction Aluminum-magnesium-silicon alloy power transmission wire, since the advent of the 20th century, have been adopted by countries in the world. Compared with the aluminum wire, the alloy wire only increases the electrical resistivity by 6-8% but its strength more than doubled. In particular, the sag characteristic (wire breaking force per unit length weight ratio) of the alloy wire is better , About twice as high as aluminum stranded wire, more than 40% more than the commonly used lightweight ACSR. Used in the transmission line, can reduce the tower height and zoom, so you can save a lot of