The Role Of Insulators in Overhead Lines

Insulators are a type of electrical isolation device and are excellent insulating materials. They play a significant role in power equipment and can effectively protect power equipment from damage. Insulators can be classified into different types, and different types have different application values in use, playing an important role in protecting power equipment. Insulators can be classified by structure into high and low voltage insulators, anti-fouling insulators, suspension insulators and bushing insulators. These types of insulators are used in different fields and industries and have demonstrated excellent performance in various industries. The insulators commonly used in overhead lines include needle insulators, butterfly insulators, suspended porcelain bottle insulators, porcelain cross arms, rod insulators and tensioning insulators, etc. These types of insulators are mainly applied in overhead lines and have excellent insulation performance. The electrical faults of insulators mainly include flashover and breakdown. Flashover occurs on the surface of insulators, and burn marks can be seen. Usually, the insulation performance is not lost. Breakdown occurs inside the insulator, discharging through the porcelain body between the iron cap and the iron foot. There may be no trace on the surface, but the insulation performance has been lost. It may also completely damage the insulator due to the generation of an electric arc. For breakdown, attention should be paid to checking the discharge marks and burn conditions of the iron feet.