Insulators are devices installed between conductors of different potentials or between conductors and grounding components, capable of withstanding voltage and mechanical stress. The main function of insulators is to achieve electrical insulation and mechanical fixation, ensuring that no breakdown or surface flashover occurs under the specified operating voltage, lightning overvoltage, and internal overvoltage, and that no damage or destruction occurs under the specified long-term and short-term mechanical load. Types of insulators There are many types of insulators, classified by materials, mainly including the following: Ceramic insulators: made of natural materials, with high electrical resistivity, high dielectric strength, and good mechanical properties, suitable for humid and corrosive environments. Glass insulator: made of tempered glass, with zero self explosion characteristics, low self explosion rate, high residual mechanical strength, suitable for high pollution areas. Composite insulator: usually made of composite materials such as resin, it has the advantages of good anti fouling flashover performance, light weight, and high mechanical strength. The historical background of insulators The history of insulators can be traced back to the 19th century. In 1844, with the installation of the first long-distance wired communication line, the world's first telegraph insulator was born. In 1897, with the popularization of AC transmission systems, the world's first power insulator was also born. Application scenarios of insulators Insulators are widely used in overhead transmission lines, especially on high-voltage line connection towers, to increase creepage distance and ensure the safety and stability of power transmission. Insulators are usually made of glass or ceramic and can withstand changes in various environmental and electrical load conditions
