IEC 61810-2-2017 Electromechanical elementary relays - Part 2 Reliability《机电式初级继电器.第2部分 可靠性》.pdf

1、 IEC 61810-2 Edition 3.0 2017-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Electromechanical elementary relays Part 2: Reliability Relais lectromcaniques lmentaires Partie 2: Fiabilit IEC 61810-2:2017-05(en-fr) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switz

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19、: csciec.ch. IEC 61810-2 Edition 3.0 2017-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Electromechanical elementary relays Part 2: Reliability Relais lectromcaniques lmentaires Partie 2: Fiabilit INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 29.120.70 ISB

20、N 978-2-8322-4388-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette pu

21、blication via un distributeur agr. colour inside 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 E

22、nvironmental 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

23、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

24、.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 10 B 34 B.2.5 Mean time to failure (MTTF) 34 B.3

25、Confidence intervals case study 34 B.3.1 General . 34 B.3.2 Interval estimation of 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 IEC 61810-2:2017 IEC 2017 3 C

26、.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.

27、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 WeiBa

28、yes 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 no

29、rmal 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 stan

30、dardization 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 In

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38、onal Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention i

39、s 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 shal

40、l 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 third edition cancels and replaces the second edition published in 2011. This edition constitutes a tec

41、hnical revision. This edition includes the following significant technical changes with respect to the previous edition: a) not only graphical but also numerical methods are added; b) reduction of number of samples in specified cases; c) new subclauses of confidence intervals are added; d) the WeiBa

42、yes approach is added to facilitate compliance tests (routine test) with lower effort; IEC 61810-2:2017 IEC 2017 5 e) 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; f) the former Annex C ha

43、s been incorporated into the modified Annex B; g) a new Annex C replaces the old Annex D. The text of this International Standard is based on the following documents: FDIS Report on voting 94/415/FDIS 94/418/RVD Full information on the voting for the approval of this International Standard can be fo

44、und in the report on voting indicated in the above table. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. This International Standard is to be used in conjunction with IEC 61649:2008. A list of all parts in the IEC 61810 series, published under the general title Ele

45、ctromechanical elementary relays, can be found on the IEC website. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the do

46、cument will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print th

47、is document using a colour printer. 6 IEC 61810-2:2017 IEC 2017 INTRODUCTION Within the IEC 61810 series of basic standards covering elementary electromechanical relays, IEC 61810-2 is intended to give requirements and tests permitting the assessment of relay reliability. All information concerning

48、endurance tests for type testing have been included in IEC 61810-1. NOTE According to IEC 61810-1, a specified value for the electrical endurance under specific conditions (e.g. contact load) is verified by testing 1 or 3 relays. None is allowed to fail. Within this document, a prediction of the rel

49、iability of a relay is performed using statistical evaluation of the measured cycles to failure of a larger number of relays (generally 10 or more relays). This document is the base for IEC 61810-2-1 to determine reliability values for relays where enhanced requirements for the verification of reliability (B 10and B 10D ) apply. The technical committee responsible for dependability has developed IE