Summary

The performance of insulators used on overhead lines and overhead distribution lines and in outdoor substations is a key factor in determining the reliability of power delivery systems. The insulators not only must withstand normal operating voltage, but also must withstand overvoltages that may cause disturbances, flashovers and line outages. The reduction in the performance of outdoor insulators occurs mainly by the pollution of the insulating surfaces from air-borne deposits that may form a conducting or partially conducting surface layer when wet.

Additional informations

Publication type Technical Brochures
Reference 158
Publication year 2000
Publisher CIGRE
Study committees Power system technical performance (C4)
Working groups TF 33.04.01
File size 2 MB
Pages number 170
Price for non member 300 €
Price for member Free
Polluted insulators : a review of current knowledge.
Polluted insulators : a review of current knowledge.