Method of aluminothermic welds qualification for down conductors and earth-terminations systems

E. Leduc, B. Lo Crasto, B. Lavinaud
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引用次数: 1

Abstract

The IEC 62305-3 imposes the use of copper cables of at least 50 mm2 for down conductors used in lightning protection. The cross section is an important factor to carry lightning currents in LPS. However, it is possible to connect these conductors in various ways. Among the different methods used in meshed network, aluminothermic welds are relevant. This process has the advantage to be corrosion proof to have good electric characteristics compared to others methods, with good mechanic holding performances. Sometimes, this method modifies the conductivity of the conductors. This is the reason for which we perfect a method to verify whether the weld changed the material or not.
下导线和接地端子系统的铝热焊接鉴定方法
IEC 62305-3规定,用于防雷的羽绒导线至少使用50mm2的铜电缆。横截面是影响LPS中雷电电流传输的重要因素。然而,可以用各种方式连接这些导体。在网状结构的各种焊接方法中,铝热焊是一种具有相关性的焊接方法。与其他方法相比,该工艺具有耐腐蚀、电气特性好、机械保持性能好等优点。有时,这种方法会改变导体的导电性。这就是为什么我们完善了一种方法来验证焊接是否改变了材料。
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