1、STDOBSI BS EN 5012b-ENGL 1979 O Lb24667 0817445 354 O BRITISH STANDARD _ Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) The European Standard EN 50126 1999 has the status of a British Standard ICs 45.020 NO COPYING WITHOUT B
2、SI PERMISSION EXCEPT AS PERMITED BY COPYRIGHT LAW BS EN 50126:1999 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-National foreword direction of the Electroot
3、echnical bd. No. Date Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 December 1999 This British Standard is the English language version of EN 501261999. The UK participation in its preparation was entrusted to Technical Committee GEM, Rail
4、way electrotechnical applications, which has the responsibility to: Comments - aid enquirem to understand the text; - present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed - monitor related international and Eur
5、opean developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement intemational or European publications referred to in this document may be found in the BSI Stand
6、ards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Sta
7、ndard does not of itself confer immunity from legal obligations. facility of the BSI Standards Electronic Catalogue. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 70, an inside back cover and a back cover. The BSI copyright notice displa
8、yed in this document indicates when the document was iast issued. O BSI 12-1999 I I ISBN O 580 35694 9 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,- STDmBSI
9、 ES EN 50326-ENGL 1999 I lb24bb9 0837447 327 EUROPEAN STANDARD EN 50126 NORME EUROPENNE EUROPISCHE NORM September 1999 ICs 29.280; 45.020 English version Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) Applications ferroviair
10、es - Spcification et dmonstration de la fiabilit, de la disponibilit, de la maintenabilit et de la scurit (FDMS) Sicherheit (RAMS) Bahnanwendungen - Spezifikation und Nachweis der Zuverlssigkeit, Verfgbarkeit, Instandhaltbarkeit, This European Standard was approved by CENELEC on 1998-10-01. CENELEC
11、members are bound to comply with the CENICENELEC 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 appli
12、cation 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 Secretari
13、at has the same status as the official versions. CENELEC members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Notway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELE
14、C European Committee for Eiectrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart, 36 B-1050 Brussels O 1999 CENELEC - All rights of exploitation in any form and by any means reserved worldw
15、ide for CENELEC members. Ref. No. EN 50126:1999 E Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-Page 2 EN 50126:1999 Foreword This European Standard was prep
16、ared by the Technical Committee CENELEC TC 9X, Electrical and electronic applications in railways. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50126 on 1998-1 0-01. The following dates were fixed: - latest date by which the EN has to be implemented at nat
17、ional level by publication of an identical national standard or by endorsement (dp) 2000-04-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dw) 2000-04-01 Annexes designated “normative” are part of the body of the standard. Annexes designated “informati
18、ve” are given for information only. In this standard, annexes A to E are informative. O BSI 12-1999 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,- . STDmBSI
19、BS EN 50326-ENGL li999 E 3624bb9 0833449 TTT E Page 3 EN 50126:1999 Contents Page Introduction . 5 1 2 3 4 4 .I 4.2 4.3 4.4 4.4.1 4.4.2 4.4.3 4.5 4.5.1 4.5.2 4.6 4.6.1 4.6.2 4.6.3 4.7 4.8 5 5 .I 5.2 5.3 6 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.1 O 6.1 I 6.1 2 6.1 3 6.14 Scope 6 Normative references 7
20、 Definit ions - 8 Railway RAMS 12 Introduction .- 12 Railway RAMS and quality of service 12 Elements of railway RAMS . - 13 Factors influencing railway RAMS . 15 General - . 15 Categories of factors . 15 Management of factors 19 The means to achieve railway RAMS requirements 20 Genera I - . 20 RAMS
21、specification . 20 Risk 21 Risk concept . 21 Risk analysis 21 Risk evaluation and acceptance 22 Safety integrity . 23 Fail-safe concept 25 General 25 System lifecycle . 26 Application of this standard . 32 RAMS lifecycle . - . 34 Phase 2: System definition and application conditions . 35 Phase 3: Ri
22、sk analysis 38 Phase 4: System requirements 39 Phase 5: Apportionment of system requirements 43 Phase 6: Design and implementation . -44 Phase 7: Manufacturing 46 Phase 8: Installation 47 Phase 9: System validation (including safety acceptance and commissioning) . 48 Phase 10: System acceptance 50 P
23、hase 11: Operation and maintenance . -51 Phase 12: Performance monitoring . 52 Phase 13: Modification and retrofit 53 Phase 14: Decommissioning and disposal 54 Management of railway RAMS 25 Phase I: Concept . 34 Annex A (informative) Outline of RAMS specification . example 56 Annex B (informative) R
24、AMS programme 60 Annex C (informative) Examples of parameters for railway . 64 Annex D (informative) Examples of some risk acceptance principles 66 Annex E (informative) Responsibilities within the RAMS process throughout the lifecycle 70 O BSI 12-1999 Copyright European Committee for Electrotechnic
25、al Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-STD-ES1 ES EN 5012b-ENGL 1999 = 3624bb9 0837450 711 Page 4 EN 50126:1999 Figures Figure 1 Quality of Service and Railway RAMS . 13 Figure 2: Inter-relation of
26、 Railway RAMS elements 13 Figure 3: Effects of Failures Within a System . 14 Figure 4: Influences on RAMS . 15 Figure 5: Factors Influencing Railway RAMS 17 Figure 6: Example of a Cause/Effect Diagram 19 Figure 7: Certified Products in Safety Systems . 24 Figure 8: System Lifecycle . 27 Figure 9: Pr
27、oject Phase Related Tasks (Sheet 2 of 2) 29 Figure 1 O: The “V“ Representation 31 Figure 11 : Verification and Validation . 32 Figure 12; RAMS Engineering and Management Implemented within a System Realization Process 34 Tables Table 1 : RAM Failure Categories 20 Table 2: Frequency of Occurrence of
28、Hazardous Events 21 Table 3: Hazard Severity Level . 22 Table 4: Frequency - Consequence Matrix 22 Table 5: Qualitative Risk Categories . 23 Table 6: Typical Example of Risk Evaluation and Acceptance 23 Table B . 1 : Example of a Basic RAMS Programme Outline . 61 Table C.1: Examples of Reliability P
29、arameters . 64 Table (2.2: Examples of Maintainability Parameters 64 Table C.3; Examples of Availability Parameters 64 Table C.4: Examples of Logistic Support Parameters . 65 Table C.5: Examples of Safety Performance Parameters . O BSI 12-1999 Copyright European Committee for Electrotechnical Standa
30、rdization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-STD-BSI BS EN 5OLi?.b-ENGL 1999 = lb24bb9 0837453 b58 = Page 5 EN 50126:1999 Introduction This European Standard provides Railway Authorities and the railway support i
31、ndustry, throughout the European Union, with a process which will enable the implementation of a consistent approach to the management of reliability, availability, maintainability and safety, denoted by the acronym RAMS. Processes for the specification and demonstration of RAMS requirements are cor
32、nerstones of this standard. This European Standard aims to promote a common understanding and approach to the management of RAMS. This European Standard can be applied systematically by a railway authority and railway support industry, throughout all phases of the lifecycle of a railway application,
33、 to develop railway specific RAMS requirements and to achieve compliance with these requirements. The systems-level approach defined by this European Standard facilitates assessment of the RAMS interactions between elements of complex railway applications. This European Standard promotes co-operatio
34、n between a railway authority and railway support industry, within a variety of procurement strategies, in the achievement of an optimal combination of RAMS and cost for railway applications. Adoption of this European Standard will support the principles of the European Single Market and facilitate
35、European railway inter-operability. The process defined by this European Standard assumes that railway authorities and railway support industry have business-level policies addressing Quality, Performance and Safety. The approach defined in this standard is consistent with the application of quality
36、 management requirements contained within the IS0 9000 series of International standards. O BSI 12-1999 1 I Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-STD
37、*BSI BS EN 5022b-ENGL 1999 1b24bb9 0817452 594 Page 6 EN 50126:1999 1 Scope 1.1 This European Standard: - defines RAMS in terms of reliability, availability, maintainability and safety and their interaction; - defines a process, based on the system lifecycle and tasks within it, for managing RAMS; -
38、 enables conflicts between RAMS elements to be controlled and managed effectively; - defines a systematic process for specifying requirements for RAMS and demonstrating that these requirements are achieved; - addresses railway specifics; - does not define RAMS targets, quantities, requirements or so
39、lutions for specific railway applications; - does not specify requirements for ensuring system security; - does not define rules or processes pertaining to the certification of railway products against the requirements of this standard; - does not define an approval process by the safety regulatory
40、authority. I .2 This European Standard is applicable: - to the specification and demonstration of RAMS for all railway applications and at all levels of such an application, as appropriate, from complete railway routes to major systems within a railway route, and to individual and combined sub-syste
41、ms and components within these major systems, including those containing software; in particular: - to new systems; - to new systems integrated into existing systems in operation prior to the creation of this standard, although it is not generally applicable to other aspects of the existing system;
42、- to modifications of existing systems in operation prior to the creation of this standard, although it is not generally applicable to other aspects of the existing system. - at all relevant phases of the lifecycle of an application; - for use by Railway Authorities and the railway support industry.
43、 NOTE Guidance on the applicability is given in the requirements of this standard. o BSI 12-1999 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-STD-BSI BS EN
44、50L2b-ENGL 1999 D 1624bb7 0817453 420 W Page 7 EN 50126:1999 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereaf
45、ter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN IS0 9001 1994 EN IS0 9002 1994 EN
46、 IS0 9003 1994 EN 501280 ENV 501 29 1998 IEC 60050( 191 ) 1990 IEC 61508 series Functional safety of electrical/electronic/programmable electronic safety-related Quality systems - Model for quality assurance in design, development, production, installation and servicing Quality systems - Model for q
47、uality assurance in production, installation and servicing Quality systems - Model for quality assurance in final inspection and test Railway applications - Software for railway control and protection systems Railway applications - Safety related electronic systems for signalling International Elect
48、rotechnical Vocabulary - Chapter 797: Dependability and quality of service Systems (*) In preparation O BSI 12-1999 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from I
49、HS-,-STDOBSI BS EN 50126-ENGL 3999 1b2Ybb7 0817454 3b7 E Page 8 EN 501 26: I999 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 apportionment a process whereby the RAMS elements for a system are sub-divided between the various items which comprise the system to provide individual targets 3.2 assessment the undertaking of an investigation in
