Is the dry-band characteristic a function of pollution and insulator design?

This research work aims to assess whether dry-band formation and location are function of pollution level with the application of new insulator surface design. Artificial pollution tests have been performed on a 4-shed 11kV insulators with conventional and textured surface designs in clean-fog chamber and a voltage ramp shape source. The statistical location and extension of the dry-bands during these comparative tests have been analysed and it may offer good suggestions to establish design guidelines in dry-band control