IEC_60137ed5.0en-d.pdf

Insulated bushings for alternating voltages above 1 000 V Reference number IEC 60137:2003(E)INTERNATIONAL STANDARD IEC60137 Fifth edition2003-08 This English-language version is derived from the original bilingual publication by leaving out all French-language pages.Missing page numbers correspond to the French-language pages.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committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also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 Insulated bushings for alternating voltages above 1 000 V For price,see current catalogue IEC 2003 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 INTERNATIONAL STANDARD IEC60137 Fifth edition2003-08 X Commission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE 60137 IEC:2003 3 CONTENTSFOREWORD.9INTRODUCTION.131Scope.152Normative references.153Terms and definitions.174Ratings.294.1Standard values of highest voltage for equipment(Um).294.2Standard values of rated current(Ir).294.3Standard values of rated thermal short-time current(Ith).294.4Standard values of rated dynamic current(Id).294.5Minimum withstand values of cantilever load.314.6Angle of mounting.314.7Minimum nominal creepage distance.314.8Temperature limits and temperature rise.314.9Standard insulation levels.334.10 Test tap on transformer bushings.335Operating conditions.335.1Temporary overvoltages.335.2Altitude.355.3Temperature of ambient air and immersion media.355.4Seismic conditions.356Ordering information and markings.356.1Enumeration of characteristics.356.2Markings.397Test requirements.417.1General requirements.417.2Test classification.417.3Condition of bushings during dielectric and thermal tests.438Type tests.458.1Dry or wet power-frequency voltage withstand test.458.2Dry lightning impulse voltage withstand test(BIL).478.3Dry or wet switching impulse voltage withstand test(SIL).498.4Thermal stability test.518.5Temperature rise test.538.6Verification of thermal short-time current withstand.578.7Cantilever load withstand test.598.8Tightness test on liquid-filled,compound-filled and liquid-insulated bushings.618.9Internal pressure test on gas-filled,gas-insulated and gas-impregnatedbushings.618.10 External pressure test on partly or completely gas-immersed bushings.638.11 Verification of dimensions.6360137 IEC:2003 5 9Routine tests.639.1Measurement of dielectric dissipation factor(tan)and capacitance atambient temperature.659.2Dry lightning impulse voltage withstand test(BIL).659.3Dry power-frequency voltage withstand test.679.4Measurement of partial discharge quantity.679.5Tests of tap insulation.699.6Internal pressure test on gas-filled,gas-insulated and gas-impregnatedbushings.699.7Tightness test on liquid-filled,compound-filled and liquid-insulated bushings.719.8Tightness test on gas-filled,gas-insulated and gas-impregnated bushings.719.9Tightness test at the flange or other fixing device.739.10 Visual inspection and dimensional check.7510Requirements a