Application of Composite Insulators to Transmission Lines

The paper* provides guidelines for the application of composite insulators to transmission lines. These guidelines are based on utility f ield experiences, results of research laboratory tests and manufacturers' recommendations. Discussed are interchangeability with porcelain and glass insulators, application in contaminated environments, material ageing, insulator icing, the use of grease, resistance to vandalism, temperature extremes, and the need for grading rings. Clarification is provided on the mechanical rating of composite insulators because there is not yet general agreement by various industry groups.