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  • IEEE C57.12.20-2011

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    TRANSFORMERS - STANDARD FOR OVERHEAD TYPE DISTRIBUTION TRANSFORMERS, 500 KVA AND SMALLER: HIGH VOLTAGE, 34500 VOLTS AND BELOW: LOW VOLTAGE, 7970/13800Y VOLTS AND BELOW

    Available format(s):  Hardcopy, PDF

    Superseded date:  23-07-2013

    Language(s):  English

    Published date:  01-01-2011

    Publisher:  Institute of Electrical & Electronics Engineers

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

    1 Scope
    2 Referenced and related publications
      2.1 Referenced American National Standards
      2.2 Related publications
    3 Ratings
      3.1 Kilovolt-ampere ratings
      3.2 Voltage ratings and tap ratings
    4 Basic lightning impulse insulation levels and dielectric
      test levels
    5 Tests
      5.1 General
      5.2 Dielectric tests
    6 Construction
      6.1 Bushings and terminals
      6.2 Accessory equipment
      6.3 Polarity, terminal markings, and angular displacement
      6.4 Oil preservation
      6.5 Tanks
    7 Storage and installation
      7.1 Storage
      7.2 Installation
    8 Design tests for fault current capability of overhead
      distribution transformer enclosures
      8.1 Objective
      8.2 Definitions
      8.3 General requirements
      8.4 Tests
      8.5 Test number 1 - an arcing fault in an enclosure
      8.6 Test number 2 - for enclosures with internal fusible
          elements
      8.7 Test results
    Annex A (informative) Informational

    Abstract - (Show below) - (Hide below)

    Ascertains the performance, interchangeability, and safety of the equipment covered, and also assists in the proper selection of such equipment.

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

    Document Type Standard
    Publisher Institute of Electrical & Electronics Engineers
    Status Superseded
    Superseded By
    Supersedes

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

    IEEE 141 : 1993 IEEE Recommended Practice for Electric Power Distribution for Industrial Plants
    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 C57.12.00 : D4 98 DRAFT STANDARD GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
    CSA C2 : 0 SINGLE-PHASE AND THREE-PHASE DISTRIBUTION TRANSFORMERS, TYPES ONAN AND LNAN
    IEEE C57.109-1993 IEEE Guide for Liquid-Immersed Transformers Through-Fault-Current Duration
    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 C57.12.29 : 2014 SWITCHGEAR AND TRANSFORMERS - PAD-MOUNTED EQUIPMENT - ENCLOSURE INTEGRITY FOR COASTAL ENVIRONMENTS
    ANSI C57.12.27 : 1982 LIQUID-FILLED DISTRIBUTION TRANSFORMERS USED IN PAD-MOUNTED INSTALLATIONS INCLUDING UNIT SUBSTATIONS CONFORMANCE STANDARD FOR,
    EEE 602 : 2007 ELECTRIC SYSTEMS IN HEALTH CARE FACILITIES
    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 DRAFT C57.12.29 : D1.5 2004 PAD-MOUNTED EQUIPMENT - ENCLOSURE INTEGRITY FOR COASTAL ENVIRONMENTS
    IEEE 295 : 1969 STANDARD FOR ELECTRONIC POWER TRANSFORMERS
    IEEE 241 : 1990 ELECTRIC POWER SYSTEMS IN COMMERCIAL BUILDINGS
    IEEE DRAFT C57.12.90 : D5.1 98 DRAFT STANDARD TEST CODE 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
    IEEE 1388-2000 IEEE Standard for the Electronic Reporting of Transformer Test Data

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

    NEMA TR1 : 2013 TRANSFORMERS, STEP VOLTAGE REGULATORS AND REACTORS
    NEMA MG 2:2014 Safety Standard for Construction and Guide for Selection, Installation and Use of Electric Motors and Generators
    ANSI C135.1 : 1999 ZINC-COATED STEEL BOLTS AND NUTS FOR OVERHEAD LINE CONSTRUCTION
    IEEE C57.12.00-2015 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
    IEEE C57.91-2011 REDLINE IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators
    IEEE C57.12.90-2010 IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers
    IEEE C37.40-2003 IEEE Standard Service Conditions and Definitions for High-Voltage Fuses, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Accessories
    IEEE C57.12.70-2011 IEEE Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers
    IEEE C37.41-2008 REDLINE IEEE Standard Design Tests for High-Voltage (>1000 V) Fuses, Fuse and Disconnecting Cutouts, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Fuse Links and Accessories Used with These Devices
    MIL-STD-209 Revision K:2005 LIFTING AND TIEDOWN PROVISIONS
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