Analysis of Electric Potential Distribution on Ceramic Disc Insulators under dry conditions using ANSYS

Power line insulators are used to support the high voltage current carrying conductors. Outdoor insulators are subjected to a variety of stresses, including mechanical, electrical and environmental stresses. These stresses are acting unison. The exact nature and magnitude of these stresses varies significantly and depends on the details of insulator design, application and location. In the present work, the electric field and potential distribution in the vicinity of standard normal type ceramic insulator (i.e. 120KN) under dry and clean conditions are presented. For modeling and finite element analysis of insulators, CATIA, HYPERMESH and ANSYS software’s were used. The field and potential distribution in the vicinity of insulator by applying normal voltage (i.e. 11kV) were observed and highly stressed regions were identified. The field and potential distributions were also observed by changing the distances of the path of the first and third ribs of the insulators keeping the creepage length constant (L).