1、 IEC 61810-2-1 Edition 2.0 2017-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Electromechanical elementary relays Part 2-1: Reliability Procedure for the verification of B 10values Relais lectromcaniques lmentaires Partie 2-1: Fiabilit Procdure de vrification des valeurs de B 10IEC 61810-2-1:2017-0
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19、es commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61810-2-1 Edition 2.0 2017-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Electromechanical elementary relays Part 2-1: Reliability Procedure for the verification of B 10values Relais lectromcaniques l
20、mentaires Partie 2-1: Fiabilit Procdure de vrification des valeurs de B 10INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 29.120.70 ISBN 978-2-8322-4389-3 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Elec
21、trotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 IEC 61810-2-1:2017 IEC 2017 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normativ
22、e references 6 3 Terms and definitions 6 3.2 Definitions related to tests 7 4 Verification of B 10. 7 4.1 General . 7 4.2 Requirements . 7 4.2.1 Test specimens . 7 4.2.2 Test circuit . 8 4.2.3 Contact loads 8 4.2.4 Environmental conditions . 8 4.2.5 Operating conditions 8 4.2.6 Failure criteria . 8
23、4.3 Performance of the tests . 9 4.3.1 Type test . 9 4.3.2 Routine test . 9 5 Evaluation and verification of B 10D. 9 5.1 General . 9 5.2 Requirements . 10 5.2.1 Test specimens . 10 5.2.2 Test circuit . 10 5.2.3 Contact loads 11 5.2.4 Environmental conditions . 11 5.2.5 Operating conditions 11 5.2.6
24、 Failure criteria . 11 5.3 Performance of the tests . 12 5.3.1 Type test . 12 5.3.2 Routine test . 12 Annex A (informative) Example illustrating the assessment of malfunctions for B 10Devaluation . 15 A.1 Purpose 15 A.2 Basic assumptions 15 A.3 Example 15 A.4 Evaluation . 16 Bibliography 17 Figure 1
25、 Schematic flowchart . 13 Figure 2 Schematic flowchart for relays where dangerous failures have to be assessed 14 Table A.1 Example with number of cycles at which malfunctions have been recorded 15 IEC 61810-2-1:2017 IEC 2017 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTROMECHANICAL ELEMENTARY
26、 RELAYS Part 2-1: Reliability Procedure for the verification of B 10values 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 in
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33、conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this pub
34、lication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect
35、, 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 is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the co
36、rrect 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 61810-2-1 has been prepar
37、ed by IEC technical committee 94: All- or-nothing electrical relays. This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a)
38、 limitation of tests to 10 M cycles in Clause 5; b) reduction of required number of test samples to 5 in specified cases; c) introduction of WeiBayes analysis for routine test under Clause 4. 4 IEC 61810-2-1:2017 IEC 2017 The text of this International Standard is based on the following documents: F
39、DIS Report on voting 94/416/FDIS 94/419/RVD Full information on the voting for the approval of this International Standard can be found 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
40、is to be used in conjunction with IEC 61810-2:2017. A list of all parts in the IEC 61810 series, published under the general title Electromechanical elementary relays, can be found on the IEC website. The committee has decided that the contents of this document will remain unchanged until the stabil
41、ity date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IEC 61810-2-1:2017 IEC 2017 5 INTRODUCTION Based on the general provisions of IEC 61
42、810-2, this part of IEC 61810 specifies reliability test procedures for electromechanical elementary relays where enhanced requirements for the verification of reliability apply. A type test is passed and then confirmed by routine tests with specified periodicity. This document describes how figures
43、 for B 10(the mean number of cycles until 10 % of the relays have failed) are derived from these life tests performed with representative relay samples. In particular when electromechanical elementary relays are intended to be incorporated in safety-related control systems of machinery in accordance
44、 with IEC 62061 and ISO 13849-1, the mean time to dangerous failure (MTTF d ) is a measure that can be taken into account when assessing the probability of dangerous failure of the safety function concerned. Although a component failure cannot be defined as “dangerous” unless the detailed applicatio
45、n is known, it is common to consider a failure mode that is likely to result in danger in a typical application of the component, and to refer to this failure mode as a “dangerous failure”. The MTTF dthen becomes the expectation of the mean time to failure in this “dangerous“ mode. For the calculati
46、on of MTTF dfor electromechanical relays, the data provided by the manufacturer for B 10Dcan be used (see Clause C.4 of ISO 13849-1:2015). Electromechanical elementary relays with forcibly guided (mechanically linked) contacts offer the possibility of a high diagnostic coverage according to 4.5.3 of
47、 ISO 13849-1:2015. NOTE Requirements for such relays are given in IEC 61810-3. 6 IEC 61810-2-1:2017 IEC 2017 ELECTROMECHANICAL ELEMENTARY RELAYS Part 2-1: Reliability Procedure for the verification of B 10values 1 Scope This part of IEC 61810 specifies reliability test procedures for electromechanic
48、al elementary relays when enhanced requirements for the verification of reliability apply. Particular provisions are given for relays incorporated in safety-related control systems of machinery in accordance with IEC 62061 and ISO 13849-1. For such relays, B 10values for dangerous failures (B 10Dval
49、ues) are derived from the tests specified in this document. 2 Normative references 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. IEC 61810-1:2015, Electromecha
