First of all, power porcelain insulators mainly include various line insulators and power station electrical insulators, as well as other insulating components for isolation or support of charged bodies. Porcelain insulators are mainly used in transmission lines of various voltage levels, substations, and electrical equipment in power systems. Such as disc suspension insulators and long rod insulators for high-voltage line tension or suspension, rod-shaped post insulators for substation busbars or equipment support, hollow insulators for transformer bushings, switchgear, capacitors, or transformers wait.

Take disc porcelain suspension insulators and post insulators as examples. Disk porcelain suspension insulators are mainly used to insulate and fix wires in high-voltage overhead transmission and distribution lines. Disc suspension insulators can be assembled into insulator strings for lines with different voltage levels. Disk suspension insulators can be divided into two types: ordinary type and pollution-resistant type according to their use environment and region. Ordinary disk-type suspension insulators are suitable for general areas.

In practical applications, the pollution flashover performance of insulators can be improved by appropriately increasing the number of insulators. Pollution-resistant disk-type suspension insulators are divided into bell jar type and double-layer umbrella type according to their umbrella structure. Pollution-resistant insulators of different structural types have their best application ranges. Pollution-resistant insulators are suitable for industrial dust, chemical, saline-alkali, coastal and foggy areas.

Different types of suspension insulators have different functions, and their structural heights and creepage distances are also different. Suspension porcelain insulators have a variety of umbrella structure designs, providing a variety of reasonable options for the use of lines in various regions. Suspension porcelain insulators are one of the important pieces of equipment for transmission lines. Suspension insulators are responsible for the important tasks of suspending wires and insulating towers. Therefore, it is often necessary to judge the degree of pollution and early failures through pollution tests.