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.
- Sponsor Committee
- PE/TR - Transformers
Learn More About PE/TR - Transformers - Status
- Inactive-Reserved Standard
- PAR Approval
- 2013-02-01
- Superseding
- 638-1992
- Board Approval
- 2013-12-11
- History
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- Published:
- 2014-03-11
- Inactivated Date:
- 2024-03-21
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
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PwrTrans-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.
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).
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