Study On Electrical Strength And Voltage Level Tolerance Characteristics Of Epoxy Resin Insulators

For different high voltage standoff insulators voltage levels, high voltage epoxy withstand voltage requirements are different, and epoxy resin insulator indicators include power frequency dry and wet withstand voltage, lightning impulse withstand voltage, lightning impulse chopped wave withstand voltage, operating impulse withstand voltage, etc. In order to avoid breakdown during operation, the breakdown voltage of high voltage epoxy resin is higher than the flashover voltage. In factory tests, the breakdown type porcelain high voltage standoff is generally subjected to spark test, that is, high voltage is applied to make frequent sparks on the insulation surface, and maintained for a certain period of time to see if it is broken down.