Skip to content
Please enter a keyword to search

  • IEEE C57.12.20-2011

    Current The latest, up-to-date edition.

    OVERHEAD-TYPE DISTRIBUTION TRANSFORMERS 500 KVA AND SMALLER: HIGH VOLTAGE, 34500 V AND BELOW; LOW VOLTAGE, 7970/13 800Y V AND BELOW

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  20-09-2011

    Publisher:  Institute of Electrical & Electronics Engineers

    Add To Cart

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

    1. Overview
    2. Normative references
    3. Definitions
    4. Ratings
    5. Basic lightning impulse insulation levels and
       dielectric test levels
    6. Tests
    7. Construction
    8. Storage and installation
    9. Design tests for fault current capability of
       overhead distribution transformer enclosures
    Annex A (informative) - Auxiliary mounting devices
    Annex B (informative) - Flow chart for fault current
                            capability tests
    Annex C (informative) - Bibliography

    Abstract - (Show below) - (Hide below)

    This standard covers certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase, 60-Hz, mineral-oil-immersed, self-cooled, overhead-type distribution transformers 500 kVA and smaller, high voltages 34 500 V and below and low voltages 7970/13 800Y V and below.

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

    Development Note Supersedes IEEE DRAFT C57.12.20. (12/2005) Supersedes ANSI C57.12.20. (01/2011)
    Document Type Standard
    Publisher Institute of Electrical & Electronics Engineers
    Status Current
    Superseded By
    Supersedes

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

    IEEE C57.12.29:2014 PAD-MOUNTED EQUIPMENT - ENCLOSURE INTEGRITY FOR COASTAL ENVIRONMENTS
    IEEE C57.12.30 : 2010 POLE-MOUNTED EQUIPMENT - ENCLOSURE INTEGRITY FOR COASTAL ENVIRONMENTS
    NEMA TR1 : 2013 TRANSFORMERS, STEP VOLTAGE REGULATORS AND REACTORS
    IEEE C57.15 : 2009 REQUIREMENTS, TERMINOLOGY, AND TEST CODE FOR STEP-VOLTAGE REGULATORS
    IEEE C57.12.39 : 2017 REQUIREMENTS FOR DISTRIBUTION TRANSFORMER TANK PRESSURE COORDINATION
    IEEE C57.12.24 : 2009 SUBMERSIBLE, THREE-PHASE TRANSFORMERS, 3750 KVA AND SMALLER: HIGH VOLTAGE, 34500 GRDY/19920 VOLTS AND BELOW; LOW VOLTAGE, 600 VOLTS AND BELOW
    CSA C2.1 : 2006 SINGLE-PHASE AND THREE-PHASE LIQUID-FILLED DISTRIBUTION TRANSFORMERS
    CAN/CSA-C2.1-06 (R2017) Single-Phase and Three-Phase Liquid-Filled Distribution Transformers
    IEEE C57.12.23 : 2009 SUBMERSIBLE SINGLE-PHASE TRANSFORMERS: 167 KVA AND SMALLER; HIGH VOLTAGE 25000 V AND BELOW; LOW VOLTAGE 600 V AND BELOW
    IEEE C57.12.35 : 2013 BAR CODING FOR DISTRIBUTION TRANSFORMERS AND STEP-VOLTAGE REGULATORS
    BS IEC 60076-21:2011 Power transformers Standard requirements, terminology, and test code for step-voltage regulators
    IEC 60076-21:2011 Power transformers - Part 21: Standard requirements, terminology, and test code for step-voltage regulators
    IEEE 3001.5 : 2013 RECOMMENDED PRACTICE FOR THE APPLICATION OF POWER DISTRIBUTION APPARATUS IN INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    IEEE 1818 : 2017 GUIDE FOR THE DESIGN OF LOW-VOLTAGE AUXILIARY SYSTEMS FOR ELECTRIC POWER SUBSTATIONS
    NASA SSTD 8070 0081 : 2001 FACILITY ELECTRICAL STANDARD
    IEEE C57.12.38 : 2014 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
    CSA C2.2:2006 : R2011 POLE-MOUNTED, SINGLE-PHASE DISTRIBUTION TRANSFORMERS FOR ELECTRIC UTILITIES
    IEEE C57.12.40 : 2011 NETWORK, THREE-PHASE TRANSFORMERS, 2500 KVA AND SMALLER; HIGH VOLTAGE, 34500 V AND BELOW; LOW VOLTAGE, 600 V AND BELOW; SUBWAY AND VAULT TYPES (LIQUID IMMERSED)
    IEEE C57.12.70-2011 STANDARD TERMINAL MARKINGS AND CONNECTIONS FOR DISTRIBUTION AND POWER TRANSFORMERS
    IEEE C57.12.00-2015 STANDARD FOR GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
    CSA C2.1 : 2006 : R2011 SINGLE-PHASE AND THREE-PHASE LIQUID-FILLED DISTRIBUTION TRANSFORMERS
    CSA C2.2 : 2006 POLE-MOUNTED, SINGLE-PHASE DISTRIBUTION TRANSFORMERS FOR ELECTRIC UTILITIES
    CAN/CSA-C2.2-06 (R2017) Pole-Mounted, Single-Phase Distribution Transformers for Electric Utilities
    IEEE C57.12.31 : 2010 POLE MOUNTED EQUIPMENT - ENCLOSURE INTEGRITY
    IEEE C57.12.28:2014 PAD-MOUNTED EQUIPMENT - ENCLOSURE INTEGRITY
    IEEE C57.156:2016 TANK RUPTURE MITIGATION OF LIQUID-IMMERSED POWER TRANSFORMERS AND REACTORS

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

    IEEE C57.12.00-2015 STANDARD FOR GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
    IEEE C57.12.90-2010 LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
    IEEE C37.40 : 2003 STANDARD SERVICE CONDITIONS AND DEFINITIONS FOR HIGH-VOLTAGE FUSES, DISTRIBUTION ENCLOSED SINGLE-POLE SWITCHES, FUSE DISCONNECTING SWITCHES, AND ACCESSORIES
    IEEE C57.12.31 : 2010 POLE MOUNTED EQUIPMENT - ENCLOSURE INTEGRITY
    IEEE C57.12.70-2011 STANDARD TERMINAL MARKINGS AND CONNECTIONS FOR DISTRIBUTION AND POWER TRANSFORMERS
    IEEE C57.12.91 : 2011 DRY-TYPE DISTRIBUTION AND POWER TRANSFORMERS
    IEEE C37.41:2008 HIGH-VOLTAGE (>1000 V) FUSES AND ACCESSORIES
    MIL STD 209 : K LIFTING AND TIEDOWN PROVISIONS
    View more information

    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective