Suspended porcelain insulator

The main function of insulators is to achieve electrical insulation and mechanical fixation, for which various electrical and mechanical performance requirements are specified. For example, under the action of the specified operating voltage, lightning overvoltage, and internal overvoltage, there should be no breakdown or surface flashover; under the specified long-term and short-term mechanical loads, no damage or destruction should occur; after long-term operation under specified mechanical, electrical loads and various environmental conditions, there should be no significant deterioration; the metal fittings of the insulators should not produce noticeable corona discharge under the operating voltage to avoid interference with radio or television reception. Since insulators are widely used, the connecting metal fittings are also required to be interchangeable. Additionally, technical standards for insulators stipulate that various electrical, mechanical, physical, and environmental condition tests should be conducted on the insulators according to their models and usage conditions to verify their performance and quality.