1、Power transformers Application guideReference numberIEC 60076-8:1997(E)INTERNATIONALSTANDARDIEC60076-8First edition1997-10This English-language version is derived from the originalbilingual publication by leaving out all French-languagepages.Missing page numbers correspond to the French-language pag
2、es.Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editions The IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1
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8、19 03 00 Power transformers Application guideFor price,see current catalogue IEC 1997 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from th
9、e publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chINTERNATIONALSTANDARDIEC60076-8First edition1997-10XCCommission Electrotechnique InternationaleInternati
10、onal Electrotechnical Commission PRICE CODE60076-8 IEC:1997 3 CONTENTSPageFOREWORD.5Clause 1General.7 2Characteristic properties of different three-phase winding combinations andmagnetic circuit designs.9 3Characteristic properties and application of auto-connected transformers.17 4Zero-sequence pro
11、perties neutral load current and earth fault conditions,magnetic saturation and inrush current.25 5Calculation of short-circuit currents in three-winding,three-phase transformers(separate winding transformers and auto-connected transformers)with earthed neutrals.51 6Parallel operation of transformer
12、s in three-phase systems.81 7Calculation of voltage drop for a specified load,three-winding transformer load loss.93 8Specification of rated quantities and tapping quantities.125 9Convertor applications with standard transformers.14710Guide to the measurement of losses in power transformers.151Annex
13、 A Basic relations for single-phase and two-phase earth faults.16560076-8 IEC:1997 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION_POWER TRANSFORMERS APPLICATION GUIDEFOREWORD1)The IEC(International Electrotechnical Commission)is a worldwide organization for standardization comprisingall national electr
14、otechnical committees(IEC National Committees).The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields.Tothis end and in addition to other activities,the IEC publishes International Standards.Their preparation
15、isentrusted to technical committees;any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work.International,governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation.The IEC collaborates closely with the In
16、ternational Organizationfor Standardization(ISO)in accordance with conditions determined by agreement between the twoorganizations.2)The formal decisions or agreements of the IEC on technical matters express,as nearly as possible,aninternational consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested National Committees.3)The documents produced have the form of recommendations for international use and are published in the formof standar