Active Standard

IEEE C57.12.91-2020

IEEE Standard Test Code for Dry-Type Distribution and Power Transformers

To reflect current practice in the testing procedures of dry-type transformers, substantive changes to Clause 5, Clause 7, Clause 10, Clause 11, and Clause 13 of IEEE Std C57.12.91-2011 have been made in this revision. Also Annex B has been added to provide guidelines for converting test results measured at 60 Hz to the equivalent values at 50 Hz and vice versa. This revision does not address transformer requirements and specific test criteria; rather they are contained in appropriate standards such as IEEE Std C57.12.01 or in user specifications.

Sponsor Committee
PE/TR - Transformers
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Status
Active Standard
PAR Approval
2016-03-03
Superseding
C57.12.91-2011
Board Approval
2020-09-24
History
Published:
2021-01-28

Working Group Details

Society
IEEE Power and Energy Society
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Sponsor Committee
PE/TR - Transformers
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Working Group
DryType-WGC57.12.91 - Dry Type Transformers - Test Code Working Group
IEEE Program Manager
Patrycja Jarosz
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Working Group Chair
David Walker

Other Activities From This Working Group

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


PC57.12.91

Standard Test Code for Dry-Type Distribution and Power Transformers

This standard describes methods for performing tests specified in IEEE Std C.57.12.01 and other referenced standards applicable to dry-type distribution and power transformers, with a voltage of 601 V or higher in the highest voltage winding. It is intended for use as a basis for performance and for the proper testing of dry-type distribution and power transformers. nThis standard applies to all dry-type transformers including those with solid cast and/or resin encapsulated windings, except as follows:na) Instrument transformersnb) Step-voltage and induction voltage regulatorsnc) Arc furnace transformersnd) Rectifier transformersne) Specialty and General Purpose transformersnf) Mine transformersng) Testing transformersnh) Welding transformersni) Drive Transformersnj) Inverter Transformer

Learn More About PC57.12.91

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.


C57.12.91-1979

IEEE Standard Test Code for Dry-Type Distribution and Power Transformers

Methods for performing tests specified in IEEE Std C57.12.01-1989 and other referenced standards applicable to dry-type distribution and power transformers are described. This standard is intended for use as a basis for performance, safety, and the proper testing of dry-type distribution and power transformers. This standard applies to all dry-type transformers except instrument transformers, step-voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, specialty transformers, and mine transformers.

Learn More About C57.12.91-1979

C57.12.91-2011

IEEE Standard Test Code for Dry-Type Distribution and Power Transformers

This revision addresses substantive changes to Clause 5, 10 and 11 This revision addresses substantive changes to Clause 5, Clause 10, and Clause 11 of IEEE Std C57.12.91-2001 to reflect current practice in the testing procedures of dry-type transformers. This revision does not address transformer requirements and specific test criteria; rather they are contained in appropriate standards such as IEEE Std C57.12.01 or in user specifications.

Learn More About C57.12.91-2011

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.


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