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  • IEEE C57.12.70-2011

    View superseded by
    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    IEEE Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers

    Available format(s):  Hardcopy, PDF

    Superseded date:  28-09-2020

    Language(s):  English

    Published date:  07-02-2012

    Publisher:  Institute of Electrical & Electronics Engineers

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    Table of Contents - (Show below) - (Hide below)

    1. Overview
    2. Normative references
    3. Marking of terminals and identification of windings
    4. Single-phase transformers
    5. Angular displacement and connections for single-phase
       transformers in three-phase and six-phase banks
    6. Phase relationships and terminal markings for
       three-phase transformers
    7. Terminal markings for three-phase to six-phase
       transformers
    8. Use of transformers with standard voltage diagrams
       in connecting systems of various phase displacements
    Annex A (informative) - Winding connection details and
            explanations
    Annex B (informative) - Bibliography

    Abstract - (Show below) - (Hide below)

    Specifies the terminal markings and connections for distribution, power, and regulating transformers covered in the IEEE C57 series of standards, guides, and recommended practices.

    General Product Information - (Show below) - (Hide below)

    Committee Transformers
    Development Note Supersedes IEEE DRAFT C57.12.70. (06/2001)
    Document Type Standard
    Publisher Institute of Electrical & Electronics Engineers
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    IEEE C57.12.10-2010 REDLINE IEEE Standard Requirements for Liquid-Immersed Power Transformers
    IEEE C57.94-1982 IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformers
    IEEE C57.12.10-2010 TRANSFORMERS - 230 KV AND BELOW 833/958 THROUGH 8333/10 417 KVA, SINGLE-PHASE, AND 750/862 THROUGH 60 000/80 000/100 000 KVA, THREE-PHASE WITHOUT LOAD TAP CHANGING; AND 3750/4687 THROUGH 60 000/80 000/100 000 KVA WITH LOAD TAP CHANGING - SAFETY REQUIREMENT
    CEI 14-43 : 2011 GUIDE FOR THE APPLICATION, SPECIFICATION, AND TESTING OF PHASE-SHIFTING TRANSFORMERS
    IEEE DRAFT C57.12.40 : D4 2006 SECONDARY NETWORK TRANSFORMERS, SUBWAY AND VAULT TYPES (LIQUID IMMERSED)
    IEEE C57.12.38-2014 IEEE Standard for Pad-Mounted-Type, Self-Cooled, Single-Phase Distribution Transformers 250 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 V and Below; Low Voltage, 480/240 V and Below
    IEEE DRAFT C57.12.36 : D10 2006 REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION SUBSTATION TRANSFORMERS
    IEEE C57.12.51-2008 IEEE Standard for Ventilated Dry- Type Power Transformers, 501 kVA and Larger, Three-Phase, with High- Voltage 601 V to 34 500 V; Low- Voltage 208Y/120 V to 4160 V- General Requirements
    IEEE DRAFT C57.12.21 : D12 MAY 92 DRAFT REQUIREMENTS FOR PAD-MOUNTED, COMPARTMENTAL-TYPE, SELF-COOLED, SINGLE-PHASE DISTRIBUTION TRANSFORMERS WITH HIGH VOLTAGE BUSHINGS; HIGH VOLTAGE, 34500 GRDY/19920 VOLTS AND BELOW; LOW VOLTAGE, 240/120 VOLTS; 16 KVA AND SMALLER
    IEEE DRAFT C57.12.91 : D3 2000 DRAFT STANDARD TEST CODE FOR DRY-TYPE DISTRIBUTION AND POWER TRANSFORMERS
    IEEE DRAFT C57.12.00 : D4 98 DRAFT STANDARD GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
    IEEE C57.12.20-2011 REDLINE IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below
    ANSI C57.12.52 : 2012 Sealed Dry-Type Power Transformers, 501 kVA and Higher, Three-Phase, with High-Voltage 601 to 34500 Volts, Low-Voltage 208Y/120 to 4160 Volts—General Requirements
    ANSI C57.12.25 : 1990 TRANSFORMERS - PAD-MOUNTED, COMPARTMENTAL-TYPE, SELF-COOLED, SINGLE-PHASE DISTRIBUTION TRANSFORMERS WITH SEPARABLE INSULATED HIGH-VOLTAGE CONNECTORS; HIGH VOLTAGE, 34 500 GRDY/19 920 VOLTS AND BELOW; LOW VOLTAGE, 240/120 VOLTS; 167 KVA AND SMALLER - REQUIREMENTS
    ANSI C57.12.24 : 2009 TRANSFORMERS - UNDERGROUND-TYPE THREE-PHASE DISTRIBUTION TRANSFORMERS, 2500 KVA AND SMALLER; HIGH VOLTAGE, 34 500 GRDY/19 920 VOLTS AND BELOW; LOW VOLTAGE, 480 VOLTS AND BELOW - REQUIREMENTS
    IEEE DRAFT C57.12.26 : 1992 PAD-MOUNTED, COMPARTMENTAL-TYPE, SELF-COOLED, THREE-PHASE DISTRIBUTION TRANSFORMERS FOR USE WITH SEPARABLE INSULATED HIGH-VOLTAGE CONNECTORS, 34 500 GRDY/19 920 V AND BELOW; 2500 KVA AND SMALLER
    IEEE DRAFT C57.12.44 : D2.1 2005 REQUIREMENTS FOR SECONDARY NETWORK PROTECTORS
    NEMA ST 20:2014 Dry Type Transformers for General Applications
    ANSI C57.12.27 : 1982 LIQUID-FILLED DISTRIBUTION TRANSFORMERS USED IN PAD-MOUNTED INSTALLATIONS INCLUDING UNIT SUBSTATIONS CONFORMANCE STANDARD FOR,
    ANSI C57.12.13 : 1982 LIQUID-FILLED TRANSFORMERS USED IN UNIT INSTALLATIONS INCLUDING UNIT SUBSTATIONS, CONFORMANCE STANDARD FOR
    IEEE/IEC 60076-57-1202-2016 IEC/IEEE International Standard Power transformers --Part 57-1202: Liquid immersed phase-shifting transformers
    IEEE C57.12.20-2017 IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below
    NEMA TR1 : 2013 TRANSFORMERS, STEP VOLTAGE REGULATORS AND REACTORS
    IEEE DRAFT C57.12.23 : 1992 TRANSFORMERS - UNDERGROUND-TYPE, SELF-COOLED, SINGLE-PHASE DISTRIBUTION TRANSFORMERS WITH SEPARABLE, INSULATED, HIGH-VOLTAGE CONNECTORS; HIGH VOLTAGE (24 940 GRDY/14 400 V AND BELOW) AND LOW VOLTAGE (240/120 V, 167 KVA AND SMALLER)
    IEEE C57.12.01-2015 REDLINE IEEE Standard for General Requirements for Dry-Type Distribution and Power Transformers
    IEEE C57.116-2014 IEEE Guide for Transformers Directly Connected to Generators
    IEEE 1861-2014 IEEE Guide for On-Site Acceptance Tests of Electrical Equipment and System Commissioning of 1000 kV AC and Above
    IEEE 638-2013 IEEE Standard for Qualification of Class 1E Transformers for Nuclear Power Generating Stations
    IEEE C57.12.24-2009 IEEE Standard for Submersible, Three-Phase Transformers, 3750 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 Volts and Below; Low Voltage, 600 Volts and Below
    IEEE DRAFT C57.18.10 : D12 APR 97 DRAFT PRACTICES AND REQUIREMENTS FOR SEMICONDUCTOR POWER RECTIFIER TRANSFORMER
    ANSI C57.12.40 : 2011 AMERICAN NATIONAL STANDARD FOR SECONDARY NETWORK TRANSFORMERS - SUBWAY AND VAULT TYPES (LIQUID IMMERSED) - REQUIREMENTS
    IEEE C57.12.23-2009 IEEE Standard for Submersible Single-Phase Transformers: 167 kVA and Smaller; High Voltage 25 000 V and Below; Low Voltage 600 V and Below
    IEEE C57.17-2012 IEEE Standard Requirements for Arc Furnace Transformers
    IEEE DRAFT C57.135 : D12 AUG 2000 DRAFT GUIDE FOR THE APPLICATION, SPECIFICATION AND TESTING OF PHASE-SHIFTING TRANSFORMERS
    IEEE C57.12.36-2007 IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers
    API 14F : 2008 : R2013 DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS
    IEC 62032:2012 Guide for the Application, Specification and Testing of Phase-Shifting Transformers
    IEEE C57.158-2017 IEEE Guide for the Application of Tertiary and Stabilizing Windings in Power Transformers
    IEEE C57.12.44-2014 IEEE Standard Requirements for Secondary Network Protectors
    IEEE DRAFT C57.12.01 : D6 2005 GENERAL REQUIREMENTS FOR DRY-TYPE DISTRIBUTION AND POWER TRANSFORMERS INCLUDING THOSE WITH SOLID-CAST AND/OR RESIN ENCAPSULATED WINDINGS
    ANSI C57.12.57 : 1987 AMERICAN NATIONAL STANDARD FOR TRANSFORMERS - VENTILATED DRY-TYPE NETWORK TRANSFORMERS 2500 KVA AND BELOW, THREE-PHASE, WITH HIGH-VOLTAGE 34500 VOLTS AND BELOW, LOW-VOLTAGE 216Y/125 AND 480Y/227 VOLTS - REQUIREMENTS
    IEEE C57.12.50 : 1981 REQUIREMENTS FOR VENTILATED DRY-TYPE DISTRIBUTION TRANSFORMERS, 1 TO 500 KVA, SINGLE-PHASE, AND 15 TO 500 KVA, THREE-PHASE, WITH HIGH-VOLTAGE 601 TO 34500 VOLTS, LOW-VOLTAGE 120 TO 600 VOLTS
    IEEE C37.121-2012 GUIDE FOR SWITCHGEAR - UNIT SUBSTATION - REQUIREMENTS
    IEEE C57.12.52-2012 IEEE Standard for Sealed Dry-Type Power Transformers, 501 kVA and Higher, Three-Phase, with High-Voltage 601 to 34500 Volts, Low-Voltage 208Y/120 to 4160 Volts—General Requirements
    IEEE C57.12.91-2011 IEEE Standard Test Code for Dry-Type Distribution and Power Transformers
    IEEE C57.12.34-2015 REDLINE IEEE Standard Requirements for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers, 10 MVA and Smaller; High-Voltage, 34.5 kV Nominal System Voltage and Below; Low-Voltage, 15 kV Nominal System Voltage and Below
    API 14F:2008 DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS
    IEEE C57.12.20-2011 TRANSFORMERS - STANDARD FOR OVERHEAD TYPE DISTRIBUTION TRANSFORMERS, 500 KVA AND SMALLER: HIGH VOLTAGE, 34500 VOLTS AND BELOW: LOW VOLTAGE, 7970/13800Y VOLTS AND BELOW
    IEEE DRAFT C57.12.90 : D5.1 98 DRAFT STANDARD TEST CODE FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
    IEEE C57.12.00-2015 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
    IEEE DRAFT C57.12.22 : D4 JUL 93 PAD-MOUNTED, COMPARTMENTAL-TYPE, SELF COOLED THREE PHASE DISTRIBUTION TRANSFORMERS WITH HIGH-VOLTAGE BUSHINGS, 2500 KVA AND SMALLER: HIGH VOLTAGE, 34 500 GRDY/19 920 VOLTS AND BELOW; LOW VOLTAGE, 480 VOLTS AND BELOW
    C9-17 Dry-type transformers
    IEEE C57.153-2015 IEEE Guide for Paralleling Regulating Transformers
    IEEE C57.129-2007 REDLINE IEEE Standard for General Requirements and Test Code for Oil-Immersed HVDC Converter Transformers
    IEEE C37.121-2012 REDLINE IEEE Guide for Switchgear - Unit Substation - Requirements
    IEEE C57.135-2011 IEEE Guide for the Application, Specification, and Testing of Phase-Shifting Transformers
    IEEE 1585 : 2002 FUNCTIONAL SPECIFICATION OF MEDIUM VOLTAGE (1-35 KV) ELECTRONIC SERIES DEVICES FOR COMPENSATION OF VOLTAGE FLUCTUATIONS
    API 14FZ : 2013 RECOMMENDED PRACTICE FOR DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, ZONE 0, ZONE 1, AND ZONE 2 LOCATIONS
    API 14F REDLINE : 2008 DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS
    ASHRAE 90.4 : 2016 ENERGY STANDARD FOR DATA CENTERS
    IEEE DRAFT C57.12.20 : D10C 2004 OVERHEAD TYPE DISTRIBUTION TRANSFORMERS, 500 KVA AND SMALLER: HIGH VOLTAGE, 34 500 VOLTS AND BELOW; LOW VOLTAGE, 7970/13 800Y VOLTS AND BELOW
    IEEE C57.12.23-2018 REDLINE IEEE Standard for Submersible Single-Phase Transformers:250 kVA and Smaller; High Voltage 34 500 GrdY/19 920 V and Below; Low Voltage 600 V and Below
    IEEE C57.12.51-2019 IEEE Guide for Mechanical Interchangeability of Ventilated Dry-Type Transformers
    IEEE C57.12.36-2017 IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers
    IEEE C57.12.24-2016 REDLINE IEEE Standard for Submersible, Three-Phase Transformers, 3750 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 Volts and Below; Low Voltage, 600 Volts and Below
    IEEE C57.105-2019 REDLINE IEEE Guide for Application of Transformer Connections in Three-Phase Electrical Systems

    Standards Referencing This Book - (Show below) - (Hide below)

    IEEE C57.12.01-2015 REDLINE IEEE Standard for General Requirements for Dry-Type Distribution and Power Transformers
    IEEE C57.12.36-2007 IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers
    IEEE C57.12.24-2009 IEEE Standard for Submersible, Three-Phase Transformers, 3750 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 Volts and Below; Low Voltage, 600 Volts and Below
    IEEE C57.12.00-2015 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
    IEEE C57.12.00-2010 REDLINE IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
    IEEE C57.12.38-2014 IEEE Standard for Pad-Mounted-Type, Self-Cooled, Single-Phase Distribution Transformers 250 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 V and Below; Low Voltage, 480/240 V and Below
    IEEE C57.12.01-2005 IEEE Standard General Requirements for Dry-Type Distribution and Power Transformers Including Those with Solid Cast and/or Resin Encapsulated Windings
    IEEE C57.12.90-2010 IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers
    ANSI C57.12.52 : 2012 Sealed Dry-Type Power Transformers, 501 kVA and Higher, Three-Phase, with High-Voltage 601 to 34500 Volts, Low-Voltage 208Y/120 to 4160 Volts—General Requirements
    IEC 60076-1:2011 Power transformers - Part 1: General
    IEEE C57.12.51-2008 IEEE Standard for Ventilated Dry- Type Power Transformers, 501 kVA and Larger, Three-Phase, with High- Voltage 601 V to 34 500 V; Low- Voltage 208Y/120 V to 4160 V- General Requirements
    IEEE C57.12.20-2011 REDLINE IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below
    IEEE C57.12.23-2009 IEEE Standard for Submersible Single-Phase Transformers: 167 kVA and Smaller; High Voltage 25 000 V and Below; Low Voltage 600 V and Below
    IEEE C57.12.40-2011 IEEE Standard for Network, Three-Phase Transformers, 2500 kVA and Smaller; High Voltage, 34 500 GrdY/19 920 and Below; Low Voltage, 600 V and Below; Subway and Vault Types (Liquid Immersed)
    IEEE C57.12.34-2015 REDLINE IEEE Standard Requirements for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers, 10 MVA and Smaller; High-Voltage, 34.5 kV Nominal System Voltage and Below; Low-Voltage, 15 kV Nominal System Voltage and Below
    IEEE C57.12.50 : 1981 REQUIREMENTS FOR VENTILATED DRY-TYPE DISTRIBUTION TRANSFORMERS, 1 TO 500 KVA, SINGLE-PHASE, AND 15 TO 500 KVA, THREE-PHASE, WITH HIGH-VOLTAGE 601 TO 34500 VOLTS, LOW-VOLTAGE 120 TO 600 VOLTS
    IEEE C57.12.10-2010 REDLINE IEEE Standard Requirements for Liquid-Immersed Power Transformers
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