IEC INTERNATIONAL STANDARD 60044-8 First edition 2002-07 Instrument transformers - Part 8: Electronic current transformers Transformateurs de mesure Partie 8: Transformateurs de courant électroniques JEC Reference number IEC 60044-8:2002(E) st andar d99s Publication numbering 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, 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/catlg-e.htm) 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 On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda.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/JP.htm) is also available by email. Please contact the Customer Service Centre (see below) for further information. Customer Service Centre please contact the Customer Service Centre: Email: [email protected] +41 22 919 02 11 Tel: Fax: +4122 919 03 00 st andar d999 IEC INTERNATIONAL 60044-8 STANDARD First edition 2002-07 Instrument transformers - Part 8: Electronic current transformers Transformateurs de mesure Partie 8: Transformateurs de courant électroniques @ IEC 2002 — 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 Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: [email protected] Web: www.iec.ch XB PRICE CODE TEC Commission Electrotechnique Internationale InternationalElectrotechnicalCommission MekAyHaponHag 3nekTpoTexHuyeckay Komuccug For price, see current catalogue st andar d999 60044-8 @ IEC:2002(E) -2 CONTENTS FOREWORD 6 Scope. 1.1 General General block diagram of electronic current transformers 1.2 8 1.3 General block diagram of electronic transformers with a digital output . 9 Normative references. 2 9 Definitions.. 3 .12 3.1 General definitions.. 3.2 Additional definitions for measuring electronic current transformers .. ..19 3.3 Additional definitions for protective electronic current transformers... 3.4 Additional definitions for digital output .... ..22 3.5 Additional definitions for analogue voltage output .... .23 3.6 Index of main definitions and abbreviations .. .23 Normal and special service conditions 4 .24 4.1 General .24 4.2 Normal service conditions .25 4.3 Special service conditions ... .26 4.4 System earthing. .28 Ratings 5 5.1 General ratings .. .28 5.2 Standard values for rated phase offset . .32 5.3 Rating for digital output . .32 5.4 Rating for analogue voltage output .. Design requirements ... 6 6.1 General design requirements .34 6.2 Design requirements for digital output , 6.3 Design requirements for analogue voltage output Classification of tests ...... 7 7.1 General ..60 7.2 Type tests Routine tests.... 7.3 7.4 Special tests . 8 Type test. 8.1 Short-time current tests. .62 8.2 Temperature-rise test.. 8.3 Impulse tests on prim