Active Standard

IEEE C57.12.70-2020

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.

Sponsor Committee
PE/TR - Transformers
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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
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Sponsor Committee
PE/TR - Transformers
Learn More About PE/TR - Transformers
Working Group
WGC57.12.70 - Standard - Terminal Markings and Connections for Distribution and Power Working Group
IEEE Program Manager
Patrycja Jarosz
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Working Group Chair
Jason Varnell

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.


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.

Learn More About C57.12.70-2000

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.

Learn More About C57.12.70-2011

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.


No Inactive-Reserved Standards
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