IEC_61811-50-2002.pdf

INTERNATIONALSTANDARDIEC61811-50QC 160500Second edition2002-03Electromechanical all-or-nothing relays Part 50:Sectional specification Electromechanical all-or-nothing telecomrelays of assessed qualityRelais lectromcaniques de tout-ou-rien Partie 50:Spcification intermdiaire Relais lectromcaniques de tout-ou-rien tlcomsoumis au rgime dassurance de la qualitReference numberIEC 61811-50:2002(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe 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,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(www.iec.ch/catlg-e.htm)enablesyou to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just PublishedThis summary of recently issued publications(www.iec.ch/JP.htm)is alsoavailable by email.Please contact the Customer Service Centre(see below)forfurther information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONALSTANDARDIEC61811-50QC 160500Second edition2002-03Electromechanical all-or-nothing relays Part 50:Sectional specification Electromechanical all-or-nothing telecomrelays of assessed qualityRelais lectromcaniques de tout-ou-rien Partie 50:Spcification intermdiaire Relais lectromcaniques de tout-ou-rien tlcomsoumis au rgime dassurance de la qualit IEC 2002 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,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.chSFor price,see current cataloguePRICE CODECommission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 61811-50 IEC:2002(E)CONTENTSFOREWORD.41General.51.1Scope.51.2Normative references.51.3Terms and definitions.61.4Preferred values.71.5Marking and documentation.82Quality assessment procedures.92.1Primary stage of manufacture.92.2Structurally similar relays.92.3Subcontracting.92.4Qualification approval procedures.92.5Quality conformance inspection.92.6Test schedule.102.7Order of tests.103Preparation of blank detail and detail specifications.104Test schedule.124.1Test sequence.124.2Types of relays,based upon environmental protection(relay technology RT).124.3Categories of application of contacts.124.4Notes relative to Table 1.125Relay reliability-Failure rate data.13Annex A(informative)Data base for failure rates.18LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61811-50 IEC:2002(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION_ELECTROMECHANICAL ALL-OR-NOTHING RELAYS Part 50:Sectional specification Electromechanical all-or-nothing telecom relaysof assessed qualityFOREWORD1)The IEC(International Electrotechnical Commission)is a worldwide organization for standardization comprisingall national electrotechnical 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 isentrusted to technical committees;any IEC National Committee interested in the subject dealt with mayparticipate