前言电力金具是输变电工程中导线与导线、绝缘子串(柱)、设备间及设备与设备间的电气、机械性能的连接和对导线、绝缘子保护的金属附件总称。它正常与否,直接关系到工程某局部、甚至全局的正常运行。随着国民经济迅速发展,330KV 和500KV 超高压输变电网络已经 Preface Electrical fittings are collectively referred to as the metal fittings for the protection of wires and insulators in the transmission and transformation projects, such as the wires and wires, insulator strings (columns), the electrical and mechanical properties of equipment and equipment and equipment. Whether it is normal or not is directly related to the normal operation of a part of the project or even the whole world. With the rapid development of the national economy, 330KV and 500KV EHV transmission and distribution networks have been established