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EN 50126 : 1999

Withdrawn
Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

RAILWAY APPLICATIONS - THE SPECIFICATION AND DEMONSTRATION OF RELIABILITY, AVAILABILITY, MAINTAINABILITY AND SAFETY (RAMS)
Withdrawn date

01-05-2006

Published date

15-09-1999

Introduction
1 Scope
2 Normative References
3 Definitions
4 Railway RAMS
      4.1 Introduction
      4.2 Railway RAMS and quality of service
      4.3 Elements of railway RAMS
      4.4 Factors influencing railway RAMS
             4.4.1 General
             4.4.2 Categories of factors
             4.4.3 Management of factors
      4.5 The means to achieve railway RAMS requirements
             4.5.1 General
             4.5.2 RAMS specification
      4.6 Risk
             4.6.1 Risk concept
             4.6.2 Risk analysis
             4.6.3 Risk evaluation and acceptance
      4.7 Safety integrity
      4.8 Fail-safe concept
5 Management of railway RAMS
      5.1 General
      5.2 System lifecyclethe lifecycle
      5.3 Application of this standard
6 RAMS lifecycle
      6.1 Phase 1: Concept
      6.2 Phase 2: System definition and application
                       conditions
      6.3 Phase 3: Risk analysis
      6.4 Phase 4: System requirements
      6.5 Phase 5: Apportionment of system requirements
      6.6 Phase 6: Design and implementation
      6.7 Phase 7: Manufacturing
      6.8 Phase 8: Installation
      6.9 Phase 9: System validation (including safety
                       acceptance and commissioning)
      6.10 Phase 10: System acceptance
      6.11 Phase 11: Operation and maintenance
      6.12 Phase 12: Performance monitoring
      6.13 Phase 13: Modification and retrofit
      6.14 Phase 14: Decommissioning and disposal
Annex A (informative) Outline of RAMS specification - example
Annex B (informative) RAMS programme
Annex C (informative) Examples of parameters for railway
Annex D (informative) Examples of some risk acceptance
                      principles
Annex E (informative) Responsibilities within the RAMS process
                      throughout the lifecycle
Figure 1 - Quality of Service and Railways RAMS
Figure 2 - Inter-relation of Railway RAMS elements
Figure 3 - Effects of Failures Within a System
Figure 4 - Influences on RAMS
Figure 5 - Factors influencing Railway RAMS
Figure 6 - Example of a Cause/Effect Diagram
Figure 7 - Certified Products in Safety Systems
Figure 8 - System Lifecycle
Figure 9 - Project Phase Related Tasks (Sheet 2 of 2)
Figure 10 - The "V" Representation
Figure 11 - Verification and Validation
Figure 12 - RAMS Engineering and Management Implemented within
            a System Realization Process
Table 1 - RAM Failure Categories
Table 2 - Frequency of Occurrence of Hazardous Events
Table 3 - Hazard Severity Level
Table 4 - Frequency - Consequence Matrix
Table 5 - Qualitative Risk Categories
Table 6 - Typical Example of Risk Evaluation and Acceptance
Table B.1 - Example of a Basic RAMS Programme Outline
Table C.1 - Examples of Reliability Parameters
Table C.2 - Examples of Maintainability Parameters
Table C.3 - Examples of Availability Parameters
Table C.4 - Examples of Logistic Support Parameters
Table C.5 - Examples of Safety Performance Parameters

Defines RAMS as in terms of Reliability, Availability, Maintainability and Safety, and their interactions. Applicable to demonstrate and specify the RAMS for all railway applications at all levels; as an application, as appropriate, from complete railway routes to major systems within a route, to combined and individual components and sub-systems, including those containing software. Guidance on the applicability is within the requirements of this standard.

Committee
TC 9X
DevelopmentNote
Corrigendum Issued on 01/05/2006, Renumbers EN 50126 to EN 50126-1. (03/2007)
DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Withdrawn

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BS EN 14750-1:2006 Railway applications. Air conditioning for urban and suburban rolling stock Comfort parameters
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EN 16207:2014 Railway applications - Braking - Functional and performance criteria of Magnetic Track Brake systems for use in railway rolling stock
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S.R. CEN/TS 45545-1:2009 RAILWAY APPLICATIONS - FIRE PROTECTION ON RAILWAY VEHICLES - PART 1: GENERAL
EN 50123-7-3:2003 Railway applications - Fixed installations - D.C. switchgear - Part 7-3: Measurement, control and protection devices for specific use in d.c. traction systems - Isolating voltage transducers and other voltage measuring devices
I.S. EN 50129:2003 RAILWAY APPLICATIONS - COMMUNICATION, SIGNALLING AND PROCESSING SYSTEMS - SAFETY RELATED ELECTRONIC SYSTEMS FOR SIGNALLING
UNI EN 16207 : 2014 RAILWAY APPLICATIONS - BRAKING - FUNCTIONAL AND PERFORMANCE CRITERIA OF MAGNETIC TRACK BRAKE SYSTEMS FOR USE IN RAILWAY ROLLING STOCK
S.R. CLC/TR 50506-1:2007 RAILWAY APPLICATIONS - COMMUNICATION, SIGNALLING AND PROCESSING SYSTEMS - APPLICATION GUIDE FOR EN 50129 - PART 1: CROSS-ACCEPTANCE
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05/30133969 DC : DRAFT MAY 2005
00/241939 DC : DRAFT MAY 2000 PREN 50129 - RAILWAY APPLICATIONS - SAFETY RELATED ELECTRONIC SYSTEMS FOR SIGNALLING
08/30183804 DC : DRAFT JUNE 2008 BS EN 50206-2 - RAILWAY APPLICATIONS - ROLLING STOCK - PANTOGRAPHS - CHARACTERISTICS AND TESTS - PART 2: PANTOGRAPHS FOR METROS AND LIGHT RAIL VEHICLES
08/30157195 DC : DRAFT APR 2008 BS EN 15806 - RAILWAY APPLICATION - BRAKING - STATIC BRAKE TESTING
I.S. EN 50159-2:2001 RAILWAY APPLICATIONS - COMMUNICATION, SIGNALLING AND PROCESSING SYSTEMS - PART 2: SAFETY RELATED COMMUNICATION IN OPEN TRANSMISSION SYSTEMS
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DIN EN 14813-1:2011-01 Railway applications - Air conditioning for driving cabs - Part 1: Comfort parameters (includes Amendment A1:2010)
CEN/TS 45545-1:2009 Railway applications - Fire protection on railway vehicles - Part 1: General
DIN EN 13848-2:2006-08 Railway applications - Track - Track geometry quality - Part 2: Measuring systems - Track recording vehicles
IEC 62551:2012 Analysis techniques for dependability - Petri net techniques
EN 62551 : 2012 ANALYSIS TECHNIQUES FOR DEPENDABILITY - PETRI NET TECHNIQUES (IEC 62551:2012)
EN 50123-7-1:2003 Railway applications - Fixed installations - D.C. switchgear - Part 7-1: Measurement, control and protection devices for specific use in d.c. traction systems - Application guide
EN 50123-1:2003 Railway applications - Fixed installations - D.C. switchgear - Part 1: General
EN 50159-2 : 2001 COR 2010 RAILWAY APPLICATIONS - COMMUNICATION, SIGNALLING AND PROCESSING SYSTEMS - PART 2: SAFETY RELATED COMMUNICATION IN OPEN TRANSMISSION SYSTEMS
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EN 50123-2:2003 Railway applications - Fixed installations - D.C. switchgear - Part 2: D.C. circuit breakers
EN 50123-3:2003/A1:2013 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - D.C. SWITCHGEAR - PART 3: INDOOR D.C. DISCONNECTORS, SWITCH-DISCONNECTORS AND EARTHING SWITCHES

EN ISO 9002:1994/AC:1997 QUALITY SYSTEMS - SPECIFICATION FOR PRODUCTION AND INSTALLATION
EN ISO 9003:1994/AC:1997 QUALITY SYSTEMS - SPECIFICATION FOR FINAL INSPECTION AND TEST
EN ISO 9001:2015 Quality management systems - Requirements (ISO 9001:2015)
ENV 50129 : DRAFT 98 RAILWAY APPLICATIONS - SAFETY RELATED ELECTRONIC SYSTEMS FOR SIGNALLING
IEC 61508-1:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 1: General requirements (see Functional Safety and IEC 61508)

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