IEEE-C57.93-1995-R2001.pdf
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1、IEEE Std C57.93-1995 (Revision of ASA C57.93-1958) IEEE Guide for Installation of Liquid- lmmersed Power Transformers Sponsor Transformers Committee of the IEEE Power Engineering Society Approved 12 December 1995 IEEE Standards Board Approved 6 January 1997 American National Standards Institute Abst
2、ract: Guidance is given for the shipping, handling, inspection, installation, and maintenance of liquid- immersed power transformers rated 501 kVA and above with secondary voltage of 1000 V and above. The entire range of power transformers is covered, including EHV transformers, with distinctions as
3、 required for various sizes, voltage ratings, and liquid insulation types. Keywords: installation, liquid-immersed, load tap changers (LTCs), transformers The Institute of Electrical and Electronics Engineers, Inc. 345 East 47th Street, New York, NY 10017-2394, USA Copyright 1996 by the Institute of
4、 Electrical and Electronics Engineers Inc. All rights reserved. Published 1996. Printed in the United States of America ISBN 1-55937-770-4 No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.
5、 Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 03:27:44 MDTNo reproduction or networking permitted without license from IHS -,-,- IEEE Standards documents are deve
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17、rewith. The IEEE shall not be responsible for identifying all patents for which a license may be required by an IEEE standard or for conducting inquiries into the legal validity or scope of those patents that are brought to its attention. Copyright The Institute of Electrical and Electronics Enginee
18、rs, Inc. Provided by IHS under license with IEEELicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 03:27:44 MDTNo reproduction or networking permitted without license from IHS -,-,- iii Introduction (This introduction is not part of IEEE Std C57.93-1995, IEEE Guide for Install
19、ation of Liquid-Immersed Power Transformers.) Power transformers usually represent one of the most important and most costly single items in substations. Furthermore, particularly for large transformers, their failure usually results in lengthy outages or downgrading of service. For these reasons, a
20、 high degree of care is required to properly install and maintain them. Because of these considerations, IEEE and other standards-developing organizations have published, since at least the early 1920s, various recommendations for testing, installing, and maintaining transformers. This guide consoli
21、dates and replaces IEEE Std C57.12.11-1980 and IEEE Std C57.12.12-1980, which cover large transformers, and ASA C57.93-1958, which covers smaller units. The intention of this guide is to assist users and manufacturers in the shipping, handling, inspection, installation, and maintenance liquid-immers
22、ed power transformers and to assure that the units are placed in service in acceptable condition to provide years of reliable service. This guide also provides information on developing a maintenance and monitoring program. This guide discusses two sizes of transformers: Clause 3:501 kVA to 10 MVA (
23、oil/air cooled OA) with primary windings less than 69 kV Clause 4:10 MVA and above with high-voltage windings 69 kV and above The working group of this guide recognizes that substantial variations exist among transformer manufacturers on certain aspects of transformer installation requirements and t
24、hat these vary with size and voltage. This guide attempts to accommodate these variations and facilitate a full understanding between manufacturer and user. Generally, the user must conform to the manufacturers minimum recommendations in order to obtain a proper warranty. The Accredited Standards Co
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