How Does The Insulator Break Down And Conduct?

However, the central space of suspension composite insulator was not treated as a vacuum, so that the residual air was ionized by the strong electric field force for a long time at composite suspension insulator, and a conductive film was formed on the hollow surface of polymer suspension insulator. That is, the ionized carbon destroyed the balance as the running time became longer and the current increased, and then encountered strong lightning current and overvoltage, which finally caused suspension type insulator to break down and conduct.