This guide is intended for use in establishing a methodology to evaluate expected long term performance of infrequently operated switch contacts used within insulating liquid filled transformers. These switch contacts are typically found in de-energized tapchangers, dual voltage switches, reversing switches, on-load tapchangers, and step voltage regulators, but the test might possibly be used to evaluate any contact that is used in insulating liquids with similar operating characteristics and within similar environments.
Society: PE - IEEE Power and Energy Society
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