Normas c57.12.20-2005

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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

IEEE Power Engineering Society
Sponsored by the Transformers Committee

IEEE 3 Park Avenue New York, NY 10016-5997, USA 9 December 2005

IEEE Std C57.12.20™-2005
(Revision of IEEE Std C57.12.20-1997)

IEEE Std C57.12.20™-2005(Revision of IEEE Std C57.12.20-1997)

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


Transformer Committee of the IEEE Power Engineering Society
Approved 9 June 2005

IEEE-SA Standards Board
Abstract: This standard covers certain electrical, dimensional, and mechanicalcharacteristics 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. Keywords: distribution transformer, overhead, mineral oil, transformer
The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY10016-5997, USA Copyright © 2005 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 9 December 2005. Printed in the United States of America. IEEE is a registered trademark in the U.S. Patent & Trademark Office, owned by the Institute of Electrical and Electronics Engineers, Incorporated. Print: PDF: ISBN 0-7381-4752-4 ISBN 0-7381-4753-2 SH95354 SS95343

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