PROJECT TITLE :

Development of the water drop???induced corona test method for composite insulators

ABSTRACT:

Traditionally, line composite insulators have been used with success in relatively clean environments mainly because of the simplicity of handling and higher pricing than ceramic insulators. Voltage upgrading and compact style of overhead lines are new typical nisch areas for composite insulators. Hydrophobicity could be a key parameter of composite insulators providing insulation performance much over ceramic insulators. But, the outstanding hydrophobic properties of composite insulators could be deteriorated not solely thanks to dry-band activity in polluted areas however also thanks to continuous corona activity on the housing material itself or corona from the metal parts (fitting, grading/ corona ring) onto the housing. Within the worst case the insulator could suffer from erosion and alternative damages [1]. This puts higher importance on protecting the insulator from long-term aging.