EN 61810-2:2017
(Main)Electromechanical elementary relays - Part 2: Reliability
Electromechanical elementary relays - Part 2: Reliability
IEC 61810-2:2017 covers test conditions and provisions for the evaluation of endurance tests using appropriate statistical methods to obtain reliability characteristics for relays. This document applies to electromechanical elementary relays considered as non-repaired items (i.e. items which are not repaired after failure). This document does not cover procedures for electromechanical elementary relays where enhanced requirements for the verification of reliability apply. This edition includes the following significant technical changes with respect to the previous edition: - not only graphical but also numerical methods are added; - reduction of number of samples in specified cases; - new subclauses of confidence intervals are added; - the WeiBayes approach is added to facilitate compliance tests (routine test) with lower effort; - annexes have been restructured into an Annex A for data analysis (normative) and Annex B (informative) where various examples of the data analysis are given; - the former Annex C has been incorporated into the modified Annex B; - a new Annex C replaces the old Annex D.
Elektromechanische Elementarrelais - Teil 2: Funktionsfähigkeit (Zuverlässigkeit)
Relais électromécaniques élémentaires - Partie 2: Fiabilité
L’IEC 61810-2:2017 couvre les conditions d’essai et les dispositions pour l’évaluation des essais d’endurance utilisant les méthodes statistiques appropriées pour obtenir les caractéristiques de fiabilité pour les relais. Le présent document s’applique aux relais électromécaniques élémentaires considérés comme des entités non réparées (c’est-à-dire des entités qui ne sont pas réparées après défaillance). Le présent document ne couvre pas les procédures d’essai relatives aux relais électromécaniques élémentaires lorsque des exigences renforcées pour la vérification de la fiabilité s’appliquent. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - ajout de méthodes non seulement graphiques mais aussi numériques; - réduction du nombre d’échantillons dans des cas spécifiés; - ajout de nouveaux paragraphes relatifs aux intervalles de confiance; - ajout de l’approche WeiBayes pour permettre une réalisation efficiente des essais de conformité (essai individuel de série); - réorganisation des annexes en Annexe A (normative), dédiée à l’analyse des données et en Annexe B (informative), dans laquelle plusieurs exemples d’analyse des données sont présentés; - insertion de l’ancienne Annexe C dans l’Annexe B modifiée; - remplacement de l’ancienne Annexe D par une nouvelle Annexe C.
Osnovni elektromehanski releji - 2. del: Zanesljivost
Ta del standarda IEC 61810 zajema preskusne pogoje in določbe za vrednotenje preskusov vzdržljivosti z uporabo ustreznih statističnih metod za pridobitev zanesljivih podatkov o lastnostih relejev. Ta dokument se uporablja za osnovne elektromehanske releje, ki se obravnavajo kot nepopravljeni elementi (tj. elementi, ki po okvari niso popravljeni). Življenjska doba releja je ponavadi izražena v številu ciklov (CTF). Zato izraz »čas« ali »trajanje« v standardu IEC 61649 pomeni »cikli«. Vendar število ciklov je pri določeni pogostosti uporabe mogoče pretvoriti v
ustrezne čase, npr. v čas do trenutka okvare (TTF). V tem dokumentu so podana merila okvare in posledične lastnosti osnovnih relejev, ki opisujejo njihovo zanesljivost pri običajni uporabi. Do okvare releja pride, ko so izpolnjena podana merila okvare.
Ker stopnjo okvar pri osnovnih relejih zlasti zaradi obrabljenih mehanizmov ni mogoče obravnavati kot stalno, cikli do okvare preskušenih elementov običajno pokažejo na Weibullovo porazdelitev. Ta dokument vključuje številske in grafične metode za izračun približnih vrednosti za Weibullovo porazdelitev z dvema parametroma ter spodnje mejne vrednosti zaupanja in metodo za potrditev vrednosti zanesljivosti z WeiBayesovo metodo. Ta dokument ne zajema postopkov za osnovne elektromehanske releje, pri katerih se uporabljajo dopolnjene zahteve za preverjanje zanesljivosti.
OPOMBA 1: Taki postopki preverjanja zanesljivosti so določeni v standardu IEC 61810-2-1. Zlasti v primerih, ko so osnovni elektromehanski releji namenjeni za vključitev v varnostne sisteme krmiljenja strojev v skladu s standardoma IEC 62061 in ISO 13849-1, IEC 61810-2-1 določa postopke za proizvajalca, da zagotovi vrednosti B10D. OPOMBA 2: Osnovni elektromehanski releji s prisilno vodenimi (mehansko povezanimi) stiki v skladu s standardom IEC 61810-3 omogočajo visoko diagnostično pokritost v skladu s točko 4.5.3 standarda ISO 13849-1:2015.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Osnovni elektromehanski releji - 2. del: ZanesljivostElektromechanische Elementarrelais - Teil 2: Funktionsfähigkeit (Zuverlässigkeit)Relais électromécaniques élémentaires - Partie 2: FiabilitéElectromechanical elementary relays - Part 2: Reliability29.120.70RelejiRelaysICS:Ta slovenski standard je istoveten z:EN 61810-2:2017SIST EN 61810-2:2018en01-januar-2018SIST EN 61810-2:2018SLOVENSKI
STANDARDSIST EN 61810-2:20111DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 61810-2
October 2017 ICS 29.120.70
Supersedes
EN 61810-2:2011
English Version
Electromechanical elementary relays - Part 2: Reliability (IEC 61810-2:2017)
Relais électromécaniques élémentaires - Partie 2: Fiabilité (IEC 61810-2:2017)
Elektromechanische Elementarrelais -
Teil 2: Funktionsfähigkeit (Zuverlässigkeit) (IEC 61810-2:2017) This European Standard was approved by CENELEC on 2017-07-04. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17,
B-1000 Brussels © 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61810-2:2017 E SIST EN 61810-2:2018
The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2018-04-06 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2020-10-06
This document supersedes EN 61810-2:2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice The text of the International Standard IEC 61810-2:2017 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61810-2-1 NOTE Harmonized as EN 61810-2-1. IEC 61810-3 NOTE Harmonized as EN 61810-3. IEC 62061 NOTE Harmonized as EN 62061. ISO 13849-1:2015 NOTE Harmonized as EN ISO 13849-1:2015 (not modified). SIST EN 61810-2:2018
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1
Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
NOTE 2
Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61649 2008
Weibull analysis EN 61649 2008
IEC 61810-1 2015
Electromechanical elementary relays -
Part 1: General and safety requirements EN 61810-1 2015
IEC 61810-2 Edition 3.0 2017-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Electromechanical elementary relays –
Part 2: Reliability
Relais électromécaniques élémentaires –
Partie 2: Fiabilité
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE
ICS 29.120.70
ISBN 978-2-8322-4388-6
– 2 – IEC 61810-2:2017 © IEC 2017 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope . 7 2 Normative references . 7 3 Terms and definitions . 7 3.21 Terms and definitions related to tests . 10 4 General considerations . 10 5 Test conditions . 11 5.1 Sample items . 11 5.2 Environmental conditions . 12 5.3 Operating conditions . 12 5.4 Test equipment . 13 6 Failure criteria . 13 7 Output data . 13 8 Analysis of output data . 13 9 Presentation of reliability measures . 13 Annex A (normative)
Data analysis . 15 A.1 General . 15 A.2 Abbreviations . 15 A.3 Symbols and definitions . 15 A.4 Weibull distribution . 16 A.5 Procedure . 17 A.5.1 Graphical methods . 17 A.5.2 Numerical methods . 22 A.5.3 Confidence Intervals . 23 A.5.4 WeiBayes Approach . 25 Annex B (informative)
Example of data analysis . 28 B.1 Graphical methods case study (cumulative hazard plot) . 28 B.1.1 General . 28 B.1.2 Procedure of cumulative hazard plot . 28 B.1.3 Example applied to life test data . 30 B.2 Numerical methods case study (Weibull probability) . 33 B.2.1 General . 33 B.2.2 Distribution parameters . 33 B.2.3 Mean cycles to failure (MCTF) . 33 B.2.4 Value of 10ˆB . 34 B.2.5 Mean time to failure (MTTF) . 34 B.3 Confidence intervals case study . 34 B.3.1 General . 34 B.3.2 Interval estimation of β . 34 B.3.3 Interval estimation of . 35 B.3.4 Lower confidence limit for B10 . 35 B.3.5 Lower confidence limit for R . 36 B.4 WeiBayes case study . 36 Annex C (informative)
Statistical tables . 38 SIST EN 61810-2:2018
IEC 61810-2:2017 © IEC 2017 – 3 –
C.1 Table of gamma function . 38 C.2 Fractiles of the normal distribution . 38 Annex D (informative)
Success run – Test without failures . 40 D.1 General . 40 D.2 Confidence level and minimum reliability . 40 D.3 Example. 41 Bibliography . 42
Figure A.1 – An example of Weibull probability paper . 18 Figure A.2 – An example of cumulative hazard plotting paper . 20 Figure A.3 – Plotting of data points and
drawing of a straight line . 20 Figure A.4 – Estimation of distribution parameters . 21 Figure B.1 – Estimation of distribution parameters . 30 Figure B.2 – Cumulative hazard plots . 32 Figure B.3 – Type test versus WeiBayes analysed periodic test . 37
Table A.1 – Confidence levels for WeiBayes without failures . 26 Table B.1 – Worksheet for cumulative hazard analysis . 28 Table B.2 – Example worksheet . 31 Table B.3 – First twenty failures in this example . 33 Table C.1 – Values of the gamma function . 38 Table C.2 – Fractiles of the normal distribution . 39 Table D.1 – Number of samples and life cycles . 41
– 4 – IEC 61810-2:2017 © IEC 2017 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
ELECTROMECHANICAL ELEMENTARY RELAYS –
Part 2: Reliability
FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and
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