Standard terminal markings and connections are described for single-phase and three phase distribution, power, and regulating transformers. For terminal markings, it covers sequence designation, external terminal designation, neutral terminal designation, grounded terminal designation, and marking of full and tap winding terminals. Additive and subtractive polarity and parallel transformer operation are described. Connections of single-phase transformers in various configurations and angular displacement of three-phase transformers to connect to various system phase displacements are covered.
- Standard Committee
- PE/TR - Transformers
- Status
- Active Standard
- PAR Approval
- 2018-06-14
- Superseding
- C57.12.70-2011
- Board Approval
- 2020-09-24
- History
-
- Published:
- 2020-09-28
Working Group Details
- Society
- IEEE Power and Energy Society
- Standard Committee
- PE/TR - Transformers
- Working Group
-
WGC57.12.70 - Standard - Terminal Markings and Connections for Distribution and Power Working Group
- IEEE Program Manager
- Patrycja Jarosz
Contact Patrycja Jarosz - Working Group Chair
- Jason Varnell
Other Activities From This Working Group
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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.
C57.12.70-2000
IEEE Standard Terminal Markings and Connections for Distribution and Power Transformers
Supersedes C57.12.70-1978 (R1992). Standard terminal markings and connections are described for single-phase and three-phase distribution,power,and regulating transformers.For terminal markings,it covers sequence designation, external terminal designation, neutral terminal designation, grounded terminal designation, and marking of full and tap winding terminals. Additive and subtractive polarity and parallel transformer operation are described.Connections of single-phase transformers in various configurations and angular displacement of three-phase transformers to connect to various system phase displacements are covered.
C57.12.70-2011
IEEE Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers
Standard terminal markings and connections are described for single-phase and three phase distribution, power, and regulating transformers. For terminal markings, it covers sequence designation, external terminal designation, neutral terminal designation, grounded terminal designation, and marking of full and tap winding terminals. Additive and subtractive polarity and parallel transformer operation are described. Connections of single-phase transformers in various configurations and angular displacement of three-phase transformers to connect to various system phase displacements are covered.
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