Analysis of Causes for Overhead Insulated Wires Breakage

With the continuous expansion of urban power grid in China, the rapid growth of electric load, the requirement of improving the reliability of power supply, and to solve the problem of tree touching wires. An increasing number of urban and rural distribution networks employ overhead insulated wires. In this paper, the advantages of overhead insulated wires are discussed, and the disadvantages of overhead insulated wires are emphatically introduced, such as plugging is not strict, easy to enter water; extrusion force is too large, wire core deformation, tension force becomes smaller; The overhead insulated wire is broken by lightning strike. It is self-important, and it is easy to break the line when it is covered with ice. A series of preventive measures are also made to solve the problem of wire breakage of overhead insulated wire.