C57.91-2011 IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators

active - Revision of C57.91-1995
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Organization: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 7 March 2012
Status: active
Page(s): 1 - 123
ICS Code (Transformers. Reactors): 29.180
ISBN (Online): 978-0-7381-7195-1
DOI: 10.1109/IEEESTD.2012.6166928

Abstracts

Regular

General recommendations for loading 65°C rise mineral-oil-immersed distribution and power transformers are covered.

Standard

This guide provides recommendations for loading mineral-oil-immersed transformers and step-voltage regulators with insulation systems rated for a 65 C average winding temperature rise at rated load. This guide applies to transformers manufactured in accordance with IEEE Std C57.12.001 and tested in accordance with IEEE Std C57.12.90, and step-voltage regulators manufactured and tested in accordance with IEEE Std C57.15. Because a substantial population of transformers and step-voltage regulators with insulation systems rated for 55 C average winding temperature rise at rated load are still in service, recommendations that are specific to this equipment are also included.

Document History

C57.91-1995 - IEEE Guide for Loading Mineral-Oil-Immersed Transformers
March 10, 2012 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

General recommendations for loading 65 °C rise mineral-oil-immersed distribution and power transformers are covered.

C57.91-2011 - IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators - Redline
March 7, 2012 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This guide provides recommendations for loading mineral-oil-immersed transformers and step-voltage regulators with insulation systems rated for a 65 C average winding temperature rise at rated load. This guide applies to transformers manufactured in accordance with IEEE Std C57.12.001 and tested in ...

C57.91-2011 - IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators
March 7, 2012 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This guide provides recommendations for loading mineral-oil-immersed transformers and step-voltage regulators with insulation systems rated for a 65 C average winding temperature rise at rated load. This guide applies to transformers manufactured in accordance with IEEE Std C57.12.001 and tested in ...

PC57.91 - IEEE Draft Guide for Loading Liquid Immersed Transformers and Voltage Regulators
October 8, 2010 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

General recommendations for loading 65 C rise mineral-oil-immersed distribution and power transformers are covered.

C57.91-1995/Cor 1-2002 - IEEE Guide for Loading Mineral-Oil-Immersed Transformers - Corrigendum 1
June 12, 2003 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Errors identified in IEEE Std C57.91-1995 are addressed in this corrigendum.

C57.91-1995 - IEEE Guide for Loading Mineral-Oil-Immersed Transformers
January 1, 1996 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this IEEE standard general recommendations for loading 65/spl deg/C rise mineral-oil-immersed distribution and power transformers are covered. Recommendations for 55/spl deg/C rise transformers are included in an annex because a substantial percentage of these transformers are still in service. A...

C57.91-1981 - IEEE Guide for Loading Mineral-Oil-Immersed Overhead and Pad-Mounted Distribution Transformers Rated 500 kVa and Less With 65 Degrees C Or 55 Degrees C Average Winding Rise
January 1, 1981 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This guide covers general recommendations for loading 65 degrees C rise mineral-oil-immersed overhead and pad-mounted distribution transformers described in American National Standards and rated 500 kVA and less. Recommendations for 55 degrees C rise transformers are included in this guide because a...

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