电力行业铜抱杆线夹失效分析

针对安徽电网近期发生的几起典型铜抱杆线夹失效案例,并结合线夹的类型分析失效原因,提出今后金属监督的重点。结果表明,铜抱杆线夹频繁开裂主要与其合金成分和成型工艺有关。对于黄铜线夹,主要加强合金成分的检测,可辅以现场电导率检测或硬度检测;对于紫铜线夹,主要加强对强度的校核以及对成型质量的外观检测。同时,注重安装阶段紧固力矩的复核。

Failure analysis of copper pole clamp in power industry

Aiming at several recent cases of typical copper pole clamp failures in Anhui power grid， combining with the type of clamp to analyze the causes of failure and put forward the focus of metal supervision in the future. The result showed that the frequent cracking of the copper pole clamp was mainly related to its alloy composition and forming process. For brass clamp， it is mainly to strengthen the detection of alloy composition， and on-site conductivity and hardness testing could be supplied. For red copper brass clamp， it is mainly to strengthen the strength check and the appearance inspection of forming quality. At the same time， pay attention to the review of the tightening torque during the installation stage.