Thermal stress on ZnO surge arresters in polluted conditions. I.Laboratory test methods

摘要

The thermal performance of ZnO surge arresters in pollutedconditions was studied in the laboratory and in the field. Laboratorytest methods such as the salt fog, solid layer, partial wetting, andslurry method are presented. The thermal stresses imposed on thearresters by the different test methods in terms of pollution severityand temperature rise are discussed