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.
- Standard Committee
- PE/TR - Transformers
- 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
- Standard Committee
- PE/TR - Transformers
- Working Group
-
DryType-WGC57.12.91 - Dry Type Transformers - Test Code Working Group
Learn More About DryType-WGC57.12.91 - Dry Type Transformers - Test Code Working Group - IEEE Program Manager
- Patrycja Jarosz
Contact Patrycja Jarosz - 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
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.
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.
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.
No Inactive-Reserved Standards