Practical considerations for the applications of polymer post insulators in transmission class switch installations

Abstract

The demonstrated advantages of polymer insulators have been verified by field experience, and these products are becoming widely accepted for suspension and horizontal line post applications. The use of polymer station posts has been comparatively small and mostly limited to bus support applications. This document reviews the characteristics of polymer posts for vertical break switch applications. Information is presented which indicates that polymer station posts may be used as direct replacements for porcelain station posts in transmission class switch installations.