The PRTV coating material has perfect performance of anti-pollution flashover

but for the anti-icing flashorer

the research in domestic and abroad have also reported fresh.According to the test results obtained from the artificial climate chamber

the author analyzed the effects of icing-water conductivity and string length on AC flashover performance of a insulator string coated with PRTV during icing and melting regime.Comparing the insulators with or without PRTV coating

the test results show that PRTV coating material exerts no effect on increasing flashover voltage of iced insulators

and the flashover voltage of insulator strings with PRTV coating decreases by about 10%～15%.The hydrophilicity of PRTV layer changes the ice status of insulator string surface

and creates many minute airspaces in the ice layer.These airspaces are inclined to cause partial discharge and damage PRTV layer

hence to increase the leakage current of insulators.