Selection of Optimal Outdoor Insulation for Refurbishment of 400 kV Substations Under Coastal Pollution

摘要

This document provides practical information on how Swedish TSO Svenska kraftnat (Svk) decided to finish using permanently installed in the past and expensive live-line washing equipment in a refurbishment project of 420 kV switch yard in the coastal area of western Sw eden. The article describes the historical background and why the decision has been taken for the selection of RTV-coating. Further, the non-standard matrix of tests intended for choosing of an optimal RTV-coating is presented together with the test results.