Insulated Crossarms Replace Steel Crossarms Shape And Installation And Operation Methods

The Dead End Clamp of the 110kv pole is replaced with an insulating cross arm with light weight, good insulation and mechanical properties. The load on the pole tower does not change. The pole tower bears vertical loads such as its own weight and the weight of accessories (guide wire, cross arm, insulator, hardware) and horizontal loads such as wind force or conductor tension for a long time. There are also additional loads such as the installation loads of the hanging wire, hanging wire, anchor wire and tightening wire during the construction of the pole tower, and the weight of the installation workers and tools. Additional installation loads: for example, when an accident occurs and the wire is disconnected or when there is a traction during the installation of the gold wire, the unbalanced tension of the wire suddenly occurs and the torque and shear force generated thereby. Since the tower structure has not been changed, only the tower cross arm material and the hanging wire method are changed, the force on the pole tower and its cross arm will not change. As long as the insulation performance and mechanical strength of the insulating cross arm are sufficient and the installation is convenient, the original steel cross arm can be replaced.

Replacing the steel cross arm with an insulating cross arm, its insulating structure shape and installation and operation mode can effectively utilize the height of the tower, simplify the structure of the tower, facilitate installation, save steel, reduce line investment, and have obvious economic benefits. In addition, with the rapid development of urban industry, the exhaust volume of industrial waste is increasing. In order to avoid the flashover of the insulating cross arm caused by this and cause power outages of the line, the 110KV composite insulating cross arm head should be studied by referring to the insulating structure of the composite insulator and using the elasticity of the insulating core rod inside the composite insulator and the hydrophobicity and hydrophobic migration of the outer insulating material. The composite insulating cross arm head can not only save the problem of raising the conductor. It should also have the characteristics of light weight, good mechanical properties, and less operation maintenance.