Functions and requirements of insulators

The main function of insulators is to achieve electrical insulation and mechanical fixation, for which various electrical and mechanical performance requirements are specified. If there is no breakdown or flashover along the surface under the action of the specified operating voltage, lightning overvoltage and internal overvoltage; under the action of the specified long-term and short-term mechanical loads, no damage or damage will occur; under the specified machine, electrical load and long-term operation under various environmental conditions, there will be no obvious deterioration; the hardware of the insulator will not produce obvious corona discharge phenomenon under the operating voltage, so as not to interfere with the reception of radio or television. Because insulators are widely used devices, their connecting hardware also requires interchangeability. In addition, the technical standards of insulators also require various electrical, mechanical, physical and environmental conditions change tests on insulators to verify their performance and quality according to different models and conditions of use.