IEEE 638-2013

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

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Revision Standard - Inactive-Reserved. Procedures for demonstrating the adequacy of new Class 1E 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 15 000 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.
This standard provides requirements to demonstrate the adequacy of new Class IE transformers, located in a mild environment of a nuclear power generating station as defined in IEEE Std 3231, to perform their required safety functions under postulated service conditions. This standard applies to single- and threephase transformers rated 601 V to 15 000 V for the highest voltage winding and up to 2500 kVA (base rating).
The purpose of this standard is to provide specific qualification procedures for Class lE transformers to demonstrate their capability to meet the requirements of IEEE Std 323. The transformer shall perform its intended function under all specified service conditions


SDO	IEEE: Institute of Electrical and Electronics Engineers
Document Number	638
Publication Date	March 11, 2014
Language	en - English
Page Count	25
Revision Level
Supercedes
Committee	Transformers

Publish Date	Document Id	Type	View
March 11, 2014	638-2013	Revision
June 22, 1992	638-1992	Revision

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IEEE 638-2013

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

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IEEE 638-2013

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

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