Evaluation on aging of polymeric insulators by inclined plane test

Polymeric materials are generally made up of two types ethylene propylene dine monomer (EPDM) and silicon rubber(SR). Though composite insulators have shown good performance in hostile environments but silicon rubber have reduced contamination problem to some extent. Hydrophobic property of silicon rubber does not allow the surface to get wet and hence contamination does not occur. This paper presents some laboratory tests performed on silicon rubber insulators to ascertain the aging. Aging properties of the polymeric materials have been studied using inclined plane test. In inclined plane test pollution of different severity was coated on the surface of polymer and proper severity was determined for the ageing. Hence aging parameters which influence aging has been studied.