Study On The Mechanism And Suppression Of Corona Discharge In Pre-insulated Bushing Dielectric

Corona discharge in the air will not cause a sharp rise in the surface temperature of pre insulated sleeve material, so the possibility of thermal cracking of pre insulated junction sleeve is small. Under actual operating conditions, ozone generated by corona discharge in the air is easy to diffuse to the surroundings, thereby reducing its impact on insulated joint sleeve material, and literature has shown that even when the ozone concentration reaches 200ppm, the ozone generated in dry oxygen has little corrosive effect on the surface of silicone rubber. As for the impact of nitric acid, researchers have proved that the conditions for generating nitric acid with a pH of 2.5 to 3 in the field exist and are completely possible.