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.
- Sponsor Committee
- PE/TR - Transformers
Learn More - Status
- Superseded Standard
- Superseded by
- C57.12.91-1995
- Board Approval
- 1978-06-16
- History
-
- ANSI Approved:
- 1978-11-29
- Published:
- 1979-12-14
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More - Sponsor Committee
- PE/TR - Transformers
Learn More - Working Group
-
DryType-WGC57.12.91 - Dry Type Transformers - Test Code Working Group
Learn More - IEEE Program Manager
- Malia Zaman
Contact - Working Group Chair
- David Walker
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
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.
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.
No Inactive-Withdrawn Standards
No Inactive-Reserved Standards