Abstract:

Along with the development of power grid construction, the wider application and deeper research of FRP （fiber reinforced polymer） materials on transmission lines are necessary. Based on previous researches of insulator cross arm, this paper completed the design and manufacture work of 110 kV composite cross arm without insulator, and achieve its safe operation in network. The test results prove that this cross arm can change the characteristics of traditional cross arm that needs insulator, and reduce the risk of windage yaw flashover； it can improve the disadvantages that human can not touch the insulator cross arm at silicone rubber umbrella skirt and it easy be attacked by birds and insects； meanwhile, it is not as brittle as porcelain insulator cross arm. Therefore, this new cross arm has more research prospect.

Key words: 110 kV transmission line, fiber reinforced polymer （FRP）, composite cross arm, physical property test, aging property test, strength test, electrical test