Skip to content
Please enter a keyword to search

  • ANSI C57.12.20 : 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    View superseded by
    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
    View superseded by

    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    Superseded date:  23-07-2013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

    Add To Cart

    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    Status Superseded
    Superseded By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 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
    CSA C2 : 0 SINGLE-PHASE AND THREE-PHASE DISTRIBUTION TRANSFORMERS, TYPES ONAN AND LNAN
    IEEE C57.109-1993 GUIDE FOR LIQUID-IMMERSED TRANSFORMER THROUGH-FAULT-CURRENT DURATION
    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 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)

    ANSI C135.1 : 1999 ZINC-COATED STEEL BOLTS AND NUTS FOR OVERHEAD LINE CONSTRUCTION
    IEEE C57.12.00-2015 STANDARD FOR GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
    IEEE C57.91:2011 GUIDE FOR LOADING MINERAL-OIL-IMMERSED TRANSFORMERS AND STEP-VOLTAGE REGULATORS
    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 C57.12.70-2011 STANDARD TERMINAL MARKINGS AND CONNECTIONS FOR DISTRIBUTION AND POWER TRANSFORMERS
    IEEE C37.41:2008 HIGH-VOLTAGE (>1000 V) FUSES AND ACCESSORIES
    MIL-STD-209 Revision K:2005 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