In the first place, present the composite insulator, usually known as porcelain insulator, which is used to help the aide. It can ensure that the aide, cross arm and apex have satisfactory assurance. The gathering advancement of composite insulator is created, the strength and association of mandrel are fundamental, and the matching arrangement of hardware strength and creasing strength is reasonable. During long stretch action in high tenacity environment, if the hydrophobicity of line post insulator is somewhat or completely lost, it is easy to make flashover disaster due twist cut off umbrella skirts, which really subverts the secured and trustworthy action of power framework.
