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EXPERIENCES ON THE CONTINUOUS MONITORING OF THE LEAKAGE CURRENT ON POLLUTED INSULATORS IN SERVICE IN THE FEDERAL REPUBLIC OF GERMANY

, , , , and . (1981)

Abstract

The paper describes monitoring of leakage current on insulators under pollution conditions in service. Results of the leakage current monitoring in a few substations in the FRG are given, together with the measures against pollution flashovers, chosen by the users. It is shown that the application of the leakage current concept leads to a better knowledge of the actual insulation strength of the monitored insulator, so that necessary measures like greasing or cleaning can be restricted to real need. Big savings in maintenance time and costs can be attained, together with a h.igher degree of reliability and security for transmission lines and substations against the risk of pollution flashover.

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