EN 61810-2:2011
(Main)Electromechanical elementary relays - Part 2: Reliability
Electromechanical elementary relays - Part 2: Reliability
IEC 61810-2:2011 covers test conditions and provisions for the evaluation of endurance tests using appropriate statistical methods to obtain reliability characteristics for relays. The main changes with respect to the previous edition are listed below: inclusion of both numerical and graphical methods for Weibull evaluation; establishment of full coherence with the second edition of the basic reliability standard IEC 61649.
This publication is to be read in conjunction with IEC 61649:2008.
Elektromechanische Elementarrelais – Teil 2: Funktionsfähigkeit (Zuverlässigkeit)
Relais électromécaniques élémentaires - Partie 2: Fiabilité
La CEI 61810-2:2011 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 relais. Les principales modifications portant sur cette précédente édition sont énumérées ci-dessous: inclusion de méthodes numériques et graphiques pour l'évaluation de Weibull; établissement d'une cohérence complète avec la deuxième édition de la norme de fiabilité de base CEI 61649.
Cette publication doit être lue conjointement avec la CEI 61649:2008.
Osnovni elektromehanski releji - 2. del: Zanesljivost
Ta del IEC 61810 zajema preskusne pogoje in določbe za vrednotenje preskusov vzdržljivosti z uporabo ustreznih statističnih metod za pridobivanje značilnosti zanesljivosti relejev. Uporabljal naj bi se skupaj z IEC 61649.
Ta mednarodni standard velja za osnovne elektromehanske releje, ki veljajo za nepopravljive predmete (tj. predmete, ki se po okvari ne popravljajo), kadar koli se naključni vzorec predmetov preskuša s številom ciklov do okvare (CTF).
Življenjska doba releja se po navadi izraža v številu ciklov. Kadar se v IEC 61649 uporabljata izraza »čas« in »trajanje«, zato pomenita »cikli«. Z dano frekvenco obratovanja pa se število ciklov lahko pretvori v ustrezen čas (npr. čas do okvare (TTF)).
V tem standardu so določena merila za okvaro in nastale značilnosti osnovnih relejev, ki opisujejo njihovo zanesljivost pri normalni uporabi. Do okvare releja pride, kadar so izpolnjena opredeljena merila za okvaro.
Ker stopnja okvare za osnovne releje ne velja za konstantno, še zlasti zaradi mehanizmov izrabe, so časi do okvare preskušanih predmetov praviloma porazdeljeni po Weibullu. Ta standard podaja številčne in grafične metode za izračun približnih vrednosti dvoparametrične Weibullove porazdelitve in spodnje meje zaupanja.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2011
1DGRPHãþD
SIST EN 61810-2:2008
Osnovni elektromehanski releji - 2. del: Zanesljivost
Electromechanical elementary relays - Part 2: Reliability
Elektromechanische Elementarrelais - Teil 2: Funktionsfähigkeit (Zuverlässigkeit)
Relais électromécaniques élémentaires - Partie 2: Fiabilité
Ta slovenski standard je istoveten z: EN 61810-2:2011
ICS:
29.120.70 Releji Relays
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 61810-2
NORME EUROPÉENNE
April 2011
EUROPÄISCHE NORM
ICS 29.120.70 Supersedes EN 61810-2:2005
English version
Electromechanical elementary relays -
Part 2: Reliability
(IEC 61810-2:2011)
Relais électromécaniques élémentaires - Elektromechanische Elementarrelais -
Partie 2: Fiabilité Teil 2: Funktionsfähigkeit (Zuverlässigkeit)
(CEI 61810-2:2011) (IEC 61810-2:2011)
This European Standard was approved by CENELEC on 2011-04-01. 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 Central Secretariat 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 Central Secretariat 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61810-2:2011 E
Foreword
The text of document 94/316/FDIS, future edition 2 of IEC 61810-2, prepared by IEC TC 94,
All-or-nothing electrical relays, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 61810-2 on 2011-04-01.
This European Standard supersedes EN 61810-2:2005.
The main changes with respect to EN 61810-2:2005 are listed below:
— inclusion of both numerical and graphical methods for Weibull evaluation;
— establishment of full coherence with the second edition of the basic reliability standard EN 61649;
— deletion of previous Annex A and Annex D since both annexes are contained in EN 61810-1.
This standard is to be used in conjunction with EN 61649:2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-01-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-04-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61810-2:2011 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61810-2:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application 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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60050-191 1990 International Electrotechnical Vocabulary - -
(IEV) -
Chapter 191: Dependability and quality of
service
IEC 60050-444 2002 International Electrotechnical Vocabulary - - -
Part 444: Elementary relays
IEC 60300-3-5 2001 Dependability management - - -
Part 3-5: Application guide - Reliability test
conditions and statistical test principles
IEC 61649 2008 Weibull analysis EN 61649 2008
IEC 61810-1 2008 Electromechanical elementary relays - EN 61810-1 2008
Part 1: General requirements
IEC 61810-2 ®
Edition 2.0 2011-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electromechanical elementary relays –
Part 2: Reliability
Relais électromécaniques élémentaires –
Partie 2: Fiabilité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 29.120.70 ISBN 978-2-88912-376-6
– 2 – 61810-2 © IEC:2011
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General considerations . 9
5 Test conditions . 10
5.1 Test items . 10
5.2 Environmental conditions . 10
5.3 Operating conditions . 10
5.4 Test equipment . 11
6 Failure criteria . 11
7 Output data . 11
8 Analysis of output data . 11
9 Presentation of reliability measures . 12
Annex A (normative) Data analysis . 13
Annex B (informative) Example of numerical and graphical Weibull analysis . 22
Annex C (informative) Example of cumulative hazard plot . 26
Annex D (informative) Gamma function . 32
Bibliography . 33
Figure A.1 – An example of Weibull probability paper . 16
Figure A.2 – An example of cumulative hazard plotting paper . 18
Figure A.3 – Plotting of data points and drawing of a straight line . 18
Figure A.4 – Estimation of distribution parameters . 19
Figure B.1 – Weibull probability chart for the example. 24
Figure C.1 – Estimation of distribution parameters . 28
Figure C.2 – Cumulative hazard plots . 30
Table B.1 – Ranked failure data . 23
Table C.1 – Work sheet for cumulative hazard analysis . 26
Table C.2 – Example work sheet . 29
Table D.1 – Values of the gamma function . 32
61810-2 © IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMECHANICAL ELEMENTARY RELAYS –
Part 2: Reliability
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61810-2 has been prepared by IEC technical committee 94: All-or-
nothing electrical relays.
This second edition cancels and replaces the first edition published in 2005. This edition
constitutes a technical revision.
The main changes with respect to the previous editions are listed below:
• inclusion of both numerical and graphical methods for Weibull evaluation;
• establishment of full coherence with the second edition of the basic reliability standard
IEC 61649;
• deletion of previous Annex A and Annex D since both annexes are contained in
IEC 61810-1.
– 4 – 61810-2 © IEC:2011
The text of this standard is based on the following documents:
FDIS Report on voting
94/316/FDIS 94/325/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61810 series can be found, under the general title
Electromechanical elementary relays, on the IEC website.
This International Standard is to be used in conjunction with IEC 61649:2008.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date
...
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