Active PAR

P638

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

This standard provides requirements to demonstrate the adequacy of new Class 1E transformers, located in a mild environment of a nuclear power generating station as defined in IEEE/IEC 60780-323, 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).

Sponsor Committee
PE/TR - Transformers
Learn More About PE/TR - Transformers
Status
Active PAR
PAR Approval
2023-12-06
Superseding
638-2013

Working Group Details

Society
IEEE Power and Energy Society
Learn More About IEEE Power and Energy Society
Sponsor Committee
PE/TR - Transformers
Learn More About PE/TR - Transformers
Working Group
638 - Power Transformers - Qualification of Class 1E Transformers for Nuclear Power Generating Stations
IEEE Program Manager
Patrycja Jarosz
Contact Patrycja Jarosz
Working Group Chair
Craig Swinderman

Other Activities From This Working Group

Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.


No Active Projects

Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.


No Active Standards

These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.


No Superseded Standards

These standards have been removed from active status through a ballot where the standard is made inactive as a consensus decision of a balloting group.


No Inactive-Withdrawn Standards

These standards are removed from active status through an administrative process for standards that have not undergone a revision process within 10 years.


638-2013
IEEE Standard for Qualification of Class 1E Transformers for Nuclear Power Generating Stations

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.

Learn More About 638-2013

Subscribe to our Newsletter

Sign up for our monthly newsletter to learn about new developments, including resources, insights and more.