High-voltage insulators are generally composed of insulator cores, insulating sleeves and metal joints. The insulator core is the main part supporting the high-voltage line, and it is usually made of materials such as porcelain, glass fiber reinforced plastic, silicone rubber, etc. The insulating sleeve is located outside the insulator core, mainly to protect the insulator core from the influence of the external environment. The metal joint connects the insulator core and the conductive line, and is usually made of conductive materials such as aluminum and steel.
The material of high-voltage insulators is very important. It needs to have good insulation performance, arc resistance, corrosion resistance and weathering resistance. At present, commonly used high-voltage insulator materials include porcelain, silicone rubber, glass fiber reinforced plastic, etc.
The main function of high-voltage insulators is to isolate the high-voltage wire from the ground to prevent the current from flowing to the ground. When the high-voltage wire transmits electricity, the surrounding air will be ionized, resulting in a certain electric field strength on the surface of the insulator core. If the electric field strength exceeds the insulation strength of the insulator, a discharge phenomenon will occur, causing the insulator to break down. Therefore, the insulation strength of high-voltage insulators is very important, and it is necessary to ensure that they can withstand the voltage and current of high-voltage lines. At the same time, high-voltage insulators also need to have good mechanical strength and weathering resistance to prevent failures such as cracking and falling off in harsh environments.
In short, high-voltage insulators are an indispensable and important part of the power system. Their good insulation performance and mechanical strength can effectively protect the normal operation of high-voltage lines. Through the introduction of this article, I believe that readers have a deeper understanding of the structure, materials and working principles of high-voltage insulators.
