C57.12.20-1997 American National Standard for Transformers - Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage 34500 Volts and Below: Low Voltage, 7970/13800Y Volts and Below

inactive - Superseded by C57.12.20-2005
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Organization: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 11 June 2003
Status: inactive
Page(s): 1 - 51
ICS Code (Transformers. Reactors): 29.180
ISBN (Online): 978-0-7381-3623-3
DOI: 10.1109/IEEESTD.2003.6830795

Abstracts

Regular

Superseded by IEEE Std C57.12.20-2005.This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of single- and three-phase, 60-Hz, mineral-oil-immersed, self-cooled, overhead-type distribution transformers 500 kVA and smaller, with high voltages 34500 volts and below and low voltages 7970/13800Y volts and below. Such transformers may include one or more of the following features: 1) High-voltage, overcurrent protection; 2) High-voltage, overvoltage protection. 3) Low-voltage, overcurrent protection; 4) Low-voltage, overvoltage protection.

Standard

Superseded by IEEE Std C57.12.20-2005.This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of single- and three-phase, 60-Hz, mineral-oil-immersed, self-cooled, overhead-type distribution transformers 500 kVA and smaller, with high voltages 34500 volts and below and low voltages 7970/13800Y volts and below. Such transformers may include one or more of the following features: 1) High-voltage, overcurrent protection; 2) High-voltage, overvoltage protection. 3) Low-voltage, overcurrent protection; 4) Low-voltage, overvoltage protection

Document History

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
November 30, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase, 60 Hz, liquid-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 are covered in...

PC57.12.20/D6, July 2017 - IEEE Draft 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
January 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Certain electrical, dimensional, and mechanical characteristics and safety features of single-and three-phase, 60 Hz, liquid-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 are covered in ...

PC57.12.20/D5, Jun 2017 - IEEE Draft 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
January 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Certain electrical, dimensional, and mechanical characteristics and safety features of single-and three-phase, 60 Hz, liquid-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 are covered in ...

PC57.12.20/D6, July 2017 - IEEE Approved Draft 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
January 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Certain electrical, dimensional, and mechanical characteristics and safety features of single-and three-phase, 60 Hz, liquid-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 are covered in ...

PC57.12.20/D4, Feb 2016 - IEEE Draft 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
January 1, 2016 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Certain electrical, dimensional, and mechanical characteristics and safety features of single-and three-phase, 60 Hz, liquid-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 are covered in ...

C57.12.20-2011 - 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
September 20, 2011 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

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 are cover...

C57.12.20-2011 - 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
September 20, 2011 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

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 are cover...

PC57.12.20/D7, Mar 2011 - IEEE Draft Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34 500 Volts and Below; Low Voltage, 7970/13 800Y Volts and Below
March 18, 2011 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

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 Volts and below and low voltages 7970/13 80...

PC57.12.20 - IEEE Draft Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34 500 Volts and Below; Low Voltage, 7970/13 800Y Volts and Below
September 28, 2010 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

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 7970/13 800 Y ...

C57.12.20-2005 - 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
January 1, 2005 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

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...

PC57.12.20/D10c - Approved IEEE Draft Standard for Overhead Type Distribution Transformers, 500 kVa and Smaller: High Voltage, 34 500 Volts and Below; Low Voltage, 7970/13 800Y Volts and Below (Revision of IEEE C57.12.20-1997) Superseded by C57.12.20-2005
January 1, 2004 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

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...

C57.12.20-1997 - American National Standard for Transformers - Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage 34500 Volts and Below: Low Voltage, 7970/13800Y Volts and Below
June 11, 2003 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Superseded by IEEE Std C57.12.20-2005.This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of single- and three-phase, 60-Hz, mineral-oil-immersed, self-cooled, overhead-type distribution transformers 500 kVA and sm...

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