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IEEE - ANSI C57.12.20

Overhead-Type Distribution Transformers 500 kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below

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Organization: IEEE
Publication Date: 16 June 2011
Status: inactive
Page Count: 55
scope:

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.

Purpose

This standard is intended for use as a basis for determining the performance, interchangeability, and safety of overhead-type distribution transformers and to assist in the proper selection of this equipment.

Document History

C57.12.20
September 21, 2023
Overhead-Type Distribution Transformers 500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below
This standard covers certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase, 60-Hz, liquid-immersed, self-cooled, overhead-type distribution...
ANSI C57.12.20
September 28, 2017
Overhead-Type Distribution Transformers 500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below
This standard covers certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase. 60 Kz. liquid-immersed, self-cooled, overhead-type distribution...
ANSI C57.12.20
June 16, 2011
Overhead-Type Distribution Transformers 500 kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and 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...
ANSI C57.12.20
April 1, 2008
Overhead-Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and 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...
ANSI C57.12.20
June 9, 2005
Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34500 Volts and Below; Low Voltage, 7970/13800Y Volts and 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...
ANSI C57.12.20
January 1, 1997
Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34500 Volts and Below: Low Voltage, 7970/13800Y Volts and Below
This standard is intended for use as a basis for determining the performance, interchangeability, and safety of the equipment covered, and to assist in the proper selection of such equipment. This...
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References

This document references:
IEEE C57.12.90 - Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers
Published by IEEE on December 5, 2015
This standard describes methods for performing tests specified in IEEE Std C57.12.00™1 and other standards applicable to liquid-immersed distribution, power, and regulating transformers. It is...
This document references:
IEEE C57.12.00 - General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
Published by IEEE on December 5, 2015
This standard describes electrical and mechanical requirements of liquid-immersed distribution and power transformers, and autotransformers and regulating transformers, single-phase and polyphase,...
This document references:
IEEE C57.12.70 - Standard Terminal Markings and Connections for Distribution and Power Transformers
Published by IEEE on September 24, 2020
This standard defines the terminal markings and connections for distribution, power, and regulating transformers covered in the IEEE C57™ series of standards, guides, and recommended practices....
This document references:
IEEE C57.12.31 - Pole-Mounted Equipment—Enclosure Integrity
Published by IEEE on December 3, 2020
This standard covers conformance tests and requirements for the enclosure integrity of pole-mounted electrical equipment containing apparatus energized in excess of 600 V. These enclosures contain...
This document references:
IEEE C57.12.80 - Terminology for Power and Distribution Transformers
Published by IEEE on September 30, 2010
This standard is a compilation of terminology and definitions related to electric power and distribution transformers and associated apparatus. It also includes similar terminology relating to power...
This document references:
IEEE C57.12.00 - General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
Published by IEEE on December 5, 2015
This standard describes electrical and mechanical requirements of liquid-immersed distribution and power transformers, and autotransformers and regulating transformers, single-phase and polyphase,...
This document references:
IEEE C57.12.90 - Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers
Published by IEEE on December 5, 2015
This standard describes methods for performing tests specified in IEEE Std C57.12.00™1 and other standards applicable to liquid-immersed distribution, power, and regulating transformers. It is...
This document is referenced by:
BS IEC 60076-21 - Power transformers Part 21: Standard requirements, terminology, and test code for step-voltage regulators
Published by BSI on December 31, 2018
A description is not available for this item.
This document is referenced by:
C2.2:06 - Pole-mounted, single-phase distribution transformers for electric utilities
Published by CSA on January 1, 2006
This Standard specifies the requirements for distribution transformers intended primarily for operation by electric utilities. Note: The operation of transformers complying with this Standard by...
This document is referenced by:
C2.1:06 - Single-phase and three-phase liquid-filled distribution transformers
Published by CSA on January 1, 2006
This Standard specifies the requirements for distribution transformers with the exception of those distribution transformers that are covered by CSA C2.2, C227.3, and C227.4. Note: The operation of...
This document is referenced by:
IEEE C57.12.35 - Bar Coding for Distribution Transformers and Step-Voltage Regulators
Published by IEEE on August 23, 2013
This standard sets forth bar-code label requirements for overhead, pad-mounted, and underground-type distribution transformers and step-voltage regulators. Included herein are requirements for data...
This document is referenced by:
IEEE C57.15 - Standard Requirements, Terminology, and Test Code for Step-Voltage Regulators
Published by IEEE on December 1, 2018
This document describes electrical, mechanical and test requirements of liquid-immersed, single- and three-phase, 50 Hz and 60 Hz, self and forced-air cooled, distribution, overhead and substation,...
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