IEC_60214-2-2004.pdf

INTERNATIONAL STANDARD IEC60214-2 First edition2004-10 Tap-changers Part 2:Application guide Reference number IEC 60214-2:2004(E)Li c e n s e d t o HHI Co.LTD.2013-07-18.An y f o r m o f r e p r o d u c t i o n a n d r e d i s t r i b u t i o n a r e s t r i c t l y p r o h i b i t e d.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 and 1.2 refer,respectively,to the base publication,the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2.Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating to this publication,including its validity,is available in the IEC Catalogue of publications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication,as well as the list of publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publications The on-line catalogue on the IEC web site(www.iec.ch/searchpub)enables you to search by a variety of criteria including text searches,technical committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also available by email.Please contact the Customer Service Centre(see below)for further information.Customer Service Centre If you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 Li c e n s e d t o HHI Co.LTD.2013-07-18.An y f o r m o f r e p r o d u c t i o n a n d r e d i s t r i b u t i o n a r e s t r i c t l y p r o h i b i t e d.INTERNATIONAL STANDARD IEC60214-2 First edition2004-10 Tap-changers Part 2:Application guide IEC 2004 Copyright-all rights reserved No 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 the 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.ch W For price,see current cataloguePRICE CODE Commission Electrotechnique InternationaleInternational Electrotechnical Commission Li c e n s e d t o HHI Co.LTD.2013-07-18.An y f o r m o f r e p r o d u c t i o n a n d r e d i s t r i b u t i o n a r e s t r i c t l y p r o h i b i t e d.2 60214-2 IEC:2004(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.7 4 Symbols and abbreviations.7 5 Types of tap-changer.8 5.1 General.8 5.2 On-load tap-changers.8 5.3 Off-circuit tap-changers.15 5.4 Liquid-immersed tap-changers.15 5.5 Dry-type tap-changers.16 5.6 Other types.17 5.7 Protective devices.18 6 Selection of tap-changers.21 6.1 General.21 6.2 On-load tap-changers.22 6.3 Off-circuit tap-changers.27 7 Location of liquid-immersed tap-changers.29 7.1 Tap selectors.29 7.2 Diverter and selector switches.29 8 Fittings.29 8.1 Valves,air-release vents and liquid sampling devices.29 8.2 Liquid level gauges.29 8.3 Low liquid level alarms.30 8.4 Nameplate and other plates.30 8.5 Devices to aid maintenance.30 8.6 Dehydrating breathers.30 9 Field service(operation,maintenance and monitoring).30 9.1 Operation.30 9.2 Maintenance.32 9.3 Monitoring in service.32 10 Information to be provided by the transformer manufacturer.34 10.1 Information required at the enquiry or order stage for an on-load tap-changer.34 10.2 Information required with enquiry or order for off-circuit tap-changers.36 10.3 Documentation.36 11 Protection and safety.37 11.1 Protection.37 11.2 Safety aspects.37 11.3 Immersing medium.37 Li c e n s e d t o HHI Co.LTD.2013-07-18.An y f o r m o f r e p r o d u c t i o n a n d r e d i s t r i b u t i o n a r e s t r i c t l y p r o h i b i t e d.60214-2 IEC:2004(E)3 Figure 1 External separate selector and diverter compartments(for mounting on the end or side of the transformer).9 Figure 2 External mounted selector switch tap-changer(for mounting on the end or side of the transformer).10 Figure 3 External mounted in-tank with separate barrier board.10 Figure 4 In-tank separate selector and diverter switch.12 Figure 5 In-tank selector switch tap-changer.13 Li c e n s e d t o HHI Co.LTD.2013-07-18.An y f o r m o f r e p r o d u c t i o n a n d r e d i s t r i b u