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
-
Stds-WGC57.12.70 - Standard - Terminal Markings and Connections for Distribution and Power Working Group
Learn More About Stds-WGC57.12.70 - Standard - Terminal Markings and Connections for Distribution and Power Working Group - IEEE Program Manager
- Malia Zaman
Contact Malia Zaman - Working Group Chair
- Jason Varnell
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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.
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