The characteristics of the various transformer connections and possible operating problems under normal or abnormal conditions are treated for three-phase distribution systems. These systems are characterized by primary voltages up to and including 34.5 kV, usually have a preponderance of connected transformers with low-voltage windings below 1000 V, and furnish electric service to consumers. All combinations of Delta and Y, grounded and ungrounded, T connected, zigzag, and certain special connections are considered. Only two-winding transformers are included. Phasing procedures and loading practices are not covered.
- Sponsor Committee
- PE/TR - Transformers
Learn More About PE/TR - Transformers - Status
- Superseded Standard
- Superseded by
- C57.105-2019
- Board Approval
- 1977-06-02
- History
-
- ANSI Approved:
- 1993-07-09
- Published:
- 1978-10-20
- Reaffirmed:
- 2008-03-27
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
-
WGC57.105 - Performance Characteristics - Transformer Connections in Three-Phase Dist Systems Working Group
- IEEE Program Manager
- Patrycja Jarosz
Contact Patrycja Jarosz - Working Group Chair
- Roger Verdolin
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.
C57.105-2019
IEEE Guide for Application of Transformer Connections in Three-Phase Electrical Systems
Descriptions of products, methods, and procedures relating to stationary batteries, battery electrolyte spill mechanisms, electrolyte containment and control methodologies, and firefighting considerations are provided.
C57.105-2019/Cor 1-2023
IEEE Guide for Application of Transformer Connections in Three Phase Electrical Systems - Corrigendum 1
Transformer connections and configurations in three-phase electrical systems are described in this guide. The characteristics of the various transformer connections and possible operating problems under normal or abnormal conditions are treated. All combinations of delta and wye, grounded and ungrounded, T connected, zigzag, and certain special connections are considered. Only two-winding and auto-transformers are included.
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.
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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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