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
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Working Group
Stds-WGC57.12.70 - Standard Terminal Markings and Connections for Distribution and Power Working Group
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IEEE Program Manager
Malia Zaman
Contact
Working Group Chair
Jason Varnell
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No Active Standards

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

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

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