Achieving Long Service Life from Transmission Line Arresters

摘要

Many transmission line surge arresters (TLSA) have been suspended from phase conductors, adding mass that creates a new mechanical node between insulator suspension clamps and Aeolian vibration dampers. This placement interferes with damper performance, and may shorten the conductor service life. Mitigations include repositioning the dampers, inspecting more frequently or selecting other installation configurations. A case study shows appropriate consideration on these factors for installation of arresters on a new 230-kV line as an alternative to continuous counterpoise.