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IEEE STANDARD

638-1992 - IEEE Standard for Qualification of Class 1E Transformers for Nuclear Power Generating Stations

Description: Procedures for demonstrating the adequacy of new Class 1E power transformers, located in a mild environment of a nuclear power generating station, to perform their required safety functions under postulated service conditions are presented. Single and three phase transformers rated 601 V to 15000 V for the highest voltage winding and up to 2500 kVA (self-cooled rating) are covered. Because of the conservative approach used in the development of this new standard for new transformers, the end point criteria cannot be used for in-service transformers.
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