Unchanged with respect to the current edition CLC/TS 50459-2:2015.
Scope of the revision:
- to update general principles for the presentation of ERTMS/ETCS/GSM-R information correlated with ERA_ERTMS_015560 v3.4.0:2016,
- to update ergonomic arrangements with EN 16186-1:2014, EN 16186-2:2017, EN 16186-3:2016
- to harmonize layout with existing and on supplier side well-established solutions and enhancement of touch-layout
- to update in accordance to the Results of the outcome of the Rascop DMI ad’hoc group

  • Technical specification
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This document provides requirements for electrical safety for:
-   dead working on an overhead contact line system;
-   working activities near an overhead contact line system when it is live.
It applies to all work activities in relation to electrical hazards only.
This document is applicable to overhead contact line systems with the following nominal voltages:
-   1,5 kV and 3 kV dc;
-   15 kV, 2x15 kV, 25 kV and 2x25 kV ac.
It also provides requirements for work activities that can give rise to electrical hazards from the return circuit.
This document does not cover electrical risk arising from:
-   live working on overhead contact line systems (live working can be carried out according to national requirements and practices);
-   working on or near other electrical sources.
If there are no other rules or procedures, this document could be applied to overhead contact line systems with other nominal voltages.

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Unchanged with respect to the current edition CLC/TS 50459-1:2015.
Scope of the revision:
- to update general principles for the presentation of ERTMS/ETCS/GSM-R information correlated with ERA_ERTMS_015560 v3.4.0:2016,
- to update ergonomic arrangements with EN 16186-1:2014, EN 16186-2:2017, EN 16186-3:2016
- to update in accordance to the Results of the outcome of the Rascop DMI ad’hoc group

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  • Technical specification
    22 pages
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Unchanged with respect to the current edition CLC/TS 50459-3:2016.
Scope of the revision:
- to update general principles for the presentation of ERTMS/ETCS/GSM-R information correlated with ERA_ERTMS_015560 v3.4.0:2016,
- to update ergonomic arrangements with EN 16186-1:2014, EN 16186-2:2017, EN 16186-3:2016
- to revise pictures and layouts
- to update in accordance to the Results of the outcome of the Rascop DMI ad’hoc group

  • Technical specification
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This European Standard describes a process to demonstrate compatibility between Rolling Stock (RST) and Train Detection Systems (TDS) for specific routes. It references the methods of measurement of interference currents and magnetic fields, the methods of measurement of the susceptibility of train detection systems and the characterization of traction power supplies. The process described in this standard is equally applicable to mainline, lightrail and metro type railways.
The basic parameters of compatibility for mainline railways are covered by the ERA Interface document (ERA/ERTMS/033281).
It should be noted that the demonstration of compatibility between the rolling stock and infrastructure with respect to physical dimensions is not detailed in this standard.
Under the Interoperability Directive, two stages of compatibility are defined. The first stage is for authorization for putting into service against generic limits, and the second stage - for putting into use, when specific limits for compatibility with TDS are addressed which are outside the general limits or non interoperable TDS are installed on the line over which the RST will run.
Compatibility requirements for non-mainline or isolated light rail/metro type lines are addressed in one stage of authorization.
This European Standard is not generally applicable to those combinations of rolling stock, traction power supply and train detection system which were accepted as compatible prior to the issue of this European Standard. However, as far as is reasonably practicable, this European Standard may be applied to modifications of rolling stock, traction power supply or train detection systems which may affect compatibility.

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The scope of this document is to define requirements for the shore supply system for auxiliaries and pre-conditioning and the related intermateable connector pairs.
Shore supplies to move the rolling stock are outside the scope of this document.

  • Standard
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This European Standard specifies requirements for the interaction between pantographs and overhead contact lines, to achieve to achieve free access.
NOTE   These requirements are defined for a limited number of pantograph types, referred to as an 'interoperable pantograph' according to 5.3, together with the geometry and characteristics of compatible overhead contact lines.
This European Standard describes parameters and values for planned and future lines.
Annex B gives some parameters for existing lines (informative).

  • Standard
    74 pages
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Unchanged with respect to the current edition CLC/TS 50238-2:2015.
Scope of the revision:
- to include the corrigendum CLC/TS 50238-2:2015/AC:2016-07,
- to correct editorial errors and to align definition of terms with EN 50238 series, EN 50617 series, IEV 60050-
811:2017 and IEV 60050-821:2017,
- to update Annex A "Interference current limits for Rolling Stock"
- to review the need of Annex B "Rolling Stock Interference Evaluation methods"

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Unchanged with respect to the current edition EN 50128:2011.
Scope of the amendment:
- Alignment with EN 50126-1:2017, EN 50126-2:2017 and EN 50129:2018 together with minor corrections

  • Amendment
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  • Amendment
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This European Standard applies to electric traction overhead contact line systems in heavy railways, light railways, trolley busses and industrial railways of public and private operators.
It applies to new installations of overhead contact line systems and for the complete reconstruction of existing overhead contact line systems.
This standard contains the requirements and tests for the design of overhead contact lines, requirements for structures and their structural calculations and verifications as well as the requirements and tests for the design of assemblies and individual parts.
This standard does not provide requirements for conductor rail systems where the conductor rails are located adjacent to the running rails.

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TC - Engllish version only; editorial corrections in 4.3.3.4, C.4.5 and E.2.

  • Corrigendum
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The main purpose of this standard is the support of rolling stock procurement, especially in light of life cycle cost (LCC) assessment.
This European Standard is applicable to the specification and verification of energy consumption of railway rolling stock. It establishes a criterion for the energy consumption of rolling stock to calculate the total net energy consumed, either at current collector or from the fuel tank, over a predefined service profile, in order to assure that the results are directly comparable or representative of the real operation of the train. For this purpose, this document takes into account the energy consumed and regenerated by the rolling stock.
This European Standard provides the framework that gives guidance on the generation of comparable energy performance values for trains and locomotives on a common basis and thereby supports benchmarking and improvement of the energy efficiency of rail vehicles.
This European Standard does not cover specification for comparison of energy consumption with other modes of transportation, or even for comparison between diesel and electric traction, covering only the energy consumption of the railway rolling stock itself.

  • Standard
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This European Standard specifies requirements for the acceptance of simulation tools used for the assessment of design of traction power supply systems.
The simulation results allow the calculation of quality indexes requested by EN 50388:2012, Clause 8.
This European Standard is applicable to the simulation of AC and DC traction power supply systems, including lines defined in the TSIs.
This European Standard does not deal with validation of simulation tools by measurement.
The minimum required functionalities are described in this European Standard (Clauses 5, 6, 7 and 8). The previous statement is valid regardless of how many additional functions the simulation tool has, e.g. energy efficiency, advanced regenerative braking, calculation of load angles...
NOTE   A new test case will be drafted considering metro, tramways and trolleybuses using 600 V - 750 V DC. Until this test case is available, this standard can also be applied to subway, tram and trolley bus systems. This test case will also integrate rail systems using 750 V.
Additionally, the application of the standard ensures that the output data of different simulation tools are consistent when they are using the same set of input data.
This European Standard only applies to the simulation of traction power supply systems characteristics at their nominal frequency for AC or DC systems. It does not apply to harmonic, electrical safety or electromagnetic compatibility studies over a wide frequency spectrum.
This European Standard does not mandate the use of a particular simulation tool in order to validate the design of a traction power supply system.
This standard has not the purpose to avoid the need for the experience of a skilled power supply designer, as well as the fulfilment of other standards like EN 50388.

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This document applies to overhead contact line systems in heavy railways, light railways, trolley buses and industrial railways of public and private operators. This document applies to new installations of overhead contact line systems and for the complete renewal of existing overhead contact line systems. This document contains the requirements and tests for the design of overhead contact lines, requirements for structures and their structural calculations and verifications as well as the requirements and tests for the design of assemblies and individual parts. This document does not provide requirements for ground level conductor rail systems (see Figure 1).

  • Standard
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This document specifies requirements for the acceptance of simulation tools used for the assessment of design of electric traction power supply systems with respect to TSI Energy. This document is applicable to the simulation of AC and DC electric traction power supply systems, in the frame of assessment required by Directive (EU) 2016/797. The methods and parameters defined in this document are only intended for use in the design of the electric traction power supply system, and hence this document solely considers validation of tools within the TSI energy subsystem for all envisaged railway networks. This document does not deal with validation of simulation tools by measurement. This document focuses on the core simulation functions comprising the equations and functions which calculate the mechanical movement of trains and also which calculate the load flow of the electrical traction power supply system. In doing so this document provides all requirements necessary to demonstrate that a simulation tool may be used for the purposes of TSI approval of electric traction power supply systems. Any simulation tool which meets the acceptance requirements of the test cases in this document can be used to determine TSI compatibility for all systems of the same voltage and frequency without any requirement for further validation as part of the TSI assessment process. This document includes controls for the modification of simulation tools, in particular the limits of applicability of certification when tools are modified. These controls focus on determining whether the core functions of the simulation model are modified. This document provides only the requirements for demonstration of the algorithms and calculations of core functions. The use of a certified simulation tool in accordance with this document does not, in itself, demonstrate good practice in electric traction power supply system design, neither does it guarantee that the simulation models and data for infrastructure or trains used in the tool are correct for a given application. The choice and application of any models and data, of individual system components, in a design is therefore subject to additional verification processes and not in the Scope of this document. Competent development of design models and full understanding of the limits of design tools remain requirements in any system design. This document does not reduce any element of the need for competent designers to lead the design process. The test cases and data shown in Clause 6 in this document do not represent an existing network, but these data are used as theoretical/virtual network only for the purpose of verification of the core functionality. NOTE A new test case will be drafted considering metro, tramways and trolleybuses using DC 600 V or DC 750 V. Until this test case is available, this document can also be applied to subway, tram and trolley bus systems. This test case will also integrate rail systems using DC 750 V. Additionally, the application of this document ensures that the output data of different simulation tools are consistent when they are using the same set of input data listed in Clause 6. This document only applies to the simulation of electric traction power supply systems characteristics at their nominal frequency for AC or DC systems. It does not consider harmonic studies, electrical safety studies (e.g. rail potential), short circuit or electromagnetic compatibility studies over a wide frequency spectrum. This document does not mandate the use of a particular simulation tool in order to validate the design of an electric traction power supply system. This document does not consider complex models with active components such as static frequency convertors.

  • Standard
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This document describes a process to demonstrate compatibility between Rolling Stock (RST) and Train Detection Systems (TDS). It describes the characterization of train detection systems, rolling stock and traction power supply systems. It is worth noting that the demonstration of technical compatibility between the rolling stock and infrastructure with respect to physical dimensions is not detailed in this document. This document is not generally applicable to those combinations of rolling stock, traction power supply and train detection system which were accepted as compatible prior to the issue of this document. However, as far as is reasonably practicable, this document can be applied to modifications of rolling stock, traction power supply or train detection systems which may affect compatibility. The detailed process can be used where no rules and processes for compatibility are established.

  • Standard
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Simulation techniques are used to assess the dynamic interaction between overhead contact lines and pantographs, as part of the prediction of current collection quality. This European Standard specifies functional requirements for the validation of such simulation methods to ensure confidence in, and mutual acceptance of the results of the simulations.
This standard deals with:
-   input and output parameters of the simulation,
-   comparison with line test measurements, and the characteristics of those line tests,
-   comparison between different simulation methods, and
-   limits of application of validated methods to assessments of pantographs and overhead contact lines
This standard applies to the current collection from an overhead contact line by pantographs mounted on railway vehicles. It does not apply to trolley bus systems.

  • Standard
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This part of IEC 61375 establishes the specification for the communication between the onboard
subsystems and the ground subsystems.
The communication system, interfaces and protocols are specified as a mobile communication
function, using any available wireless technology.
This document provides requirements in order to:
a) select the wireless network on the basis of QoS parameters requested by the application;
b) allow TCMS and/or OMTS applications, installed on-board and communicating on the onboard
communication network, to have a remote access to applications running on ground
installations;
c) allow applications running on ground installations to have a remote access to the TCMS
and/or OMTS applications installed on-board.
This document specifies further requirements which allow the applications running on-board
and the applications running on ground to connect each other applying the virtual/functional
addressing mechanism specified by IEC 61375-2-3 and exchanging application data sets
produced or consumed by the on-board functions implemented in the devices attached to the
TCN network.
Furthermore, this document covers the security requirements in order to grant the access only
to authenticated and authorised applications and to allow encryption of exchanged data.
The communication of safety related data between on-board applications and ground
applications are out of the scope of this International Standard as well as Internet connectivity
service for passengers.

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The purpose of this document is to support rolling stock procurement, especially life cycle cost (LCC) assessment. This document is applicable to the specification and verification of energy consumption of railway rolling stock. It establishes a criterion for the energy consumption of rolling stock to calculate the total net energy consumed, either at current collector or from the fuel tank, over a predefined service profile, to ensure that the results are directly comparable or representative of the real operation of the train. For this purpose, this document considers the energy consumed and regenerated by the rolling stock. The determination methods covered are the simulation and the measurement. This document provides the framework that gives guidance on the generation of comparable energy performance values for trains and locomotives on a common basis and thereby supports benchmarking and improvement of the energy efficiency of rail vehicles. This document does not cover the comparison of energy consumption with other modes of transportation, or even for comparison between diesel and electric traction, covering only the energy consumption of the railway rolling stock itself.

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CCMC - reference corrected.
2019-09-18 mah: no xml because AC

  • Corrigendum
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In accordance with the ERTMS/ETCS specifications, Subset 121, UIC 612 leaflet, ERA_ERTMS_015560 document, EN 50126 and EN 61375 series requirements, this Technical Report describes the Train Display System (TDS) in the driver’s cab, and the link between the TDS/TDC and some of its interfaces (Blue box and blue links only):
Figure 1 - Functional architecture
The scope of this document is to define the functional architecture around the TDC.
This Technical Report excludes the following items:
-   Communication protocols (e.g. EN 61375 series);
-   Ergonomic aspects;
-   Interface with ETCS (Subset 121);
-   Train functions;
-   GSM-R EIRENE functions;
-   Use of the displays as terminals for maintenance purpose.

  • Technical report
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This European standard is applicable to safety-related electronic systems (including subsystems and equipment) for railway signalling applications.
This European standard applies to generic systems (i.e. generic products or systems defining a class of applications), as well as to systems for specific applications.
The scope of this European standard, and its relationship with other CENELEC standards, are shown in Figure 1.
This European standard is applicable only to the functional safety of systems. It is not intended to deal with other aspects of safety such as the occupational health and safety of personnel. While functional safety of systems clearly can have an impact on the safety of personnel, there are other aspects of system design which can also affect occupational health and safety and which are not covered by this European standard.
This European standard applies to all the phases of the life-cycle of a safety-related electronic system, focusing in particular on phases from 5 (architecture and apportionment of system requirements) to 10 (system acceptance) as defined in EN 50126 (all parts).
Requirements for systems which are not related to safety are outside the scope of this European Standard.
This European standard is not applicable to existing systems, subsystems or equipment (i.e. those which had already been accepted prior to the creation of this European standard). However, as far as reasonably practicable, it should be applied to modifications and extensions to existing systems, subsystems and equipment.
This European standard is primarily applicable to systems, subsystems or equipment which have been specifically designed and manufactured for railway signalling applications. It should also be applied, as far as reasonably practicable, to general-purpose or industrial equipment (e.g. power supplies, display screens or other commercial off the shelf items), which is procured for use as part of a safety-related electronic system. As a minimum, evidence should be provided in such cases to demonstrate either
-   that the equipment is not relied on for safety, or
-   that the equipment can be relied on for those functions which relate to safety.
This European standard is aimed at railway duty holders, railway suppliers, and assessors as well as at safety authorities, although it does not define an approval process to be applied by the safety authorities.
(...)

  • Standard
    154 pages
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Simulation techniques are used to assess the dynamic interaction between overhead contact lines and pantographs, as part of the prediction of current collection quality. This document specifies functional requirements for the validation of such simulation methods to ensure confidence in, and mutual acceptance of the results of the simulations. This document deals with: - input and output parameters of the simulation; - comparison with line test measurements, and the characteristics of those line tests; - validation of pantograph models; - comparison between different simulation methods; - limits of application of validated methods to assessments of pantographs and overhead contact lines. This document applies to the current collection from an overhead contact line by pantographs mounted on railway vehicles. It does not apply to trolley bus systems.

  • Standard
    87 pages
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This document is applicable to safety-related electronic systems (including subsystems and equipment) for railway signalling applications. This document applies to generic systems (i.e. generic products or systems defining a class of applications), as well as to systems for specific applications. The scope of this document, and its relationship with other CENELEC standards, are shown in Figure 1. This document is applicable only to the functional safety of systems. It is not intended to deal with other aspects of safety such as the occupational health and safety of personnel. While functional safety of systems clearly can have an impact on the safety of personnel, there are other aspects of system design which can also affect occupational health and safety and which are not covered by this document. This document applies to all the phases of the life cycle of a safety-related electronic system, focusing in particular on phases from 5 (architecture and apportionment of system requirements) to 10 (system acceptance) as defined in EN 50126-1:2017. Requirements for systems which are not related to safety are outside the scope of this document. This document is not applicable to existing systems, subsystems or equipment which had already been accepted prior to the creation of this document. However, so far as reasonably practicable, it should be applied to modifications and extensions to existing systems, subsystems and equipment. This document is primarily applicable to systems, subsystems or equipment which have been specifically designed and manufactured for railway signalling applications. It should also be applied, so far as reasonably practicable, to general-purpose or industrial equipment (e.g. power supplies, display screens or other commercial off the shelf items), which is procured for use as part of a safety-related electronic system. As a minimum, evidence should be provided in such cases (more information is given in 6.2) to demonstrate either - that the equipment is not relied on for safety, or - that the equipment can be relied on for those functions which relate to safety. This document is aimed at railway duty holders, railway suppliers, and assessors as well as at safety authorities, although it does not define an approval process to be applied by the safety authorities.

  • Standard
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IEC 61375-2-6:2018 establishes the specification for the communication between the on-board subsystems and the ground subsystems. The communication system, interfaces and protocols are specified as a mobile communication function, using any available wireless technology. This document provides requirements in order to: a) select the wireless network on the basis of QoS parameters requested by the application; b) allow TCMS and/or OMTS applications, installed on-board and communicating on the on-board communication network, to have a remote access to applications running on ground installations; c) allow applications running on ground installations to have a remote access to the TCMS and/or OMTS applications installed on-board.

  • Standard
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TC - Engllish version only; editorial corrections in 4.3.3.4, C.4.5 and E.2.

  • Corrigendum
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This Technical Report provides recommendations for DC reversible substations. These recommendations apply
to systems and components that facilitate the flow of energy to and from the upstream AC grid including their
related interfaces.
These recommendations provide the necessary functions for the recovery of braking energy. It is intended to be
used in fixed electrical installations with nominal voltage not exceeding 3 000 V DC which supply electrical
power to vehicles used in public guided transport systems, i.e. railway vehicles, tramway vehicles, underground
vehicles and trolley-buses
It is intended to provide an overview of state-of-the-art applications, define the minimum recommendations that
are presently available, and provide functional recommendations to be applied to these substations.
This document focuses mainly on the substation converters and the traction transformers. Other devices such
as switchgear - if they are the same as in classic substations - are not addressed here. Moreover this
specification addresses performance, constraints, validation and acceptance criteria for the implementation of
reversible substations.
This document provides the minimum recommendations to be fulfilled. However, due to the different possible
solutions and different types of existing technologies, this document does not provide technical specifications of
the basic components that facilitate the functionalities described.

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This Technical Report is covering the description of the pantograph system and the functional
interface between the pantograph system itself and the TCMS, including the context of multiple units.
The pantograph system contains the pantograph and the pantograph control. The internal interface
between pantograph and pantograph control is not in the scope of this document.

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In accordance with the ERTMS/ETCS specifications, Subset 121, UIC 612 leaflet, ERA_ERTMS_015560 document, EN 50126 and EN 61375 series requirements, this Technical Report describes the Train Display System (TDS) in the driver’s cab, and the link between the TDS/TDC and some of its interfaces (Blue box and blue links only): [figure] Figure 1 - Functional architecture The scope of this document is to define the functional architecture around the TDC. This Technical Report excludes the following items: - Communication protocols (e.g. EN 61375 series); - Ergonomic aspects; - Interface with ETCS (Subset 121); - Train functions; - GSM-R EIRENE functions; - Use of the displays as terminals for maintenance purpose.

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This European Standard defines the process, protective measures and demonstration of safety in accordance with EN 50126 for the conventional electric traction system of railways applications. The standard can also apply to guided mass transport systems and trolleybus systems. All these systems can be elevated, at-grade and underground. Other systems including those listed below were not assessed. For similar technology and similar hazardous scenarios the safety considerations of this standard can be applied as a guideline where applicable. - underground mine traction systems, - cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the traction power supply system, - suspended cable cars, - funicular railways, - magnetic levitated systems, - railways with inductive power with inductive contactless transmission of the energy from the electric traction power supply system to the electrically powered traction unit, - railways with buried contact line system that is required to be energised only below the train to ensure safety, This European Standard applies to conventional electric traction systems, which are new or are undergoing major changes on new or existing lines.

  • Standard
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This draft European Standard covers the requirements applicable to the Energy Measurement Function (EMF) of an Energy Measurement System (EMS) for use on board traction units for measurement of energy supplied directly from/to the Contact Line system.
This draft European Standard also gives requirements for the Current Measurement Function (e.g. current sensor), the Voltage Measurement Function (e.g. voltage sensor) and the Energy Calculation Function (e.g. energy meter).
The Conformity Assessment arrangements for the Voltage Measurement Function, Current Measurement Function, the Energy Calculation Function and a complete Energy Measurement Function are also specified in this document.
The standard has been developed taking into account that in some applications the EMF may be subjected to legal metrological control. All relevant metrological aspects are covered in this part.
Figure 2 shows the flow between the functional blocks of the EMF. Only connections between the functional blocks required by this standard are displayed.

  • Standard
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This draft European Standard applies to all electronic equipment for control, regulation, protection, diagnostic, supply, etc. installed on rail vehicles.
For the purpose of this draft European Standard, electronic equipment is defined as equipment mainly composed of semiconductor devices and recognized associated components. These components will mainly be mounted on printed boards.
Sensors (current, voltage, speed, etc.) and firing unit printed board assemblies for power electronic devices are covered by this standard. Complete firing units and electronic power circuits are covered by EN 61287-1.
This draft European Standard covers the conditions of operation, design requirements, documentation, and testing of electronic equipment, as well as basic hardware and software requirements considered necessary for compliant and reliable equipment.
Specific requirements related to practices necessary to ensure defined levels of functional safety will be determined in accordance with relevant railway safety standards.
Subject to the paragraph above, software is within the scope of this standard until a suitable standard for software on board rolling stock is available.
NOTE    A standard for software on board rolling stock (except for software for train control and protection) is under development.

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This draft European Standard describes the primary purpose of the EMS, which is to meter energy consumption for billing and provide compiled energy billing data (CEBD) to a DCS. The EMS may also be used for other functions such as energy management. In addition, this draft European Standard also describes the primary purpose of a DCS and its interactions with an EMS and settlement system.
This part of EN 50463:
-   gives requirements for the complete Energy Measurement System and also requirements for all devices implementing one or more functions of the Energy Measurement System;
-   applies to newly manufactured Energy Measurement Systems for use on board railway traction units, powered by a.c. and/or d.c. supply voltages as listed in EN 50163;
-   does not apply to portable Energy Measurement Systems.

  • Standard
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This draft European Standard covers the requirements applicable to the Data Handling System (DHS) of an Energy Measurement System.
This document also includes the basic requirements for the Data Collection Service on-ground, relating to the acquisition and storage and export of Compiled Energy Billing Data.
The Conformity Assessment arrangements for the DHS and the DCS are specified in this document.
The settlement system is outside the scope of this standard, and the specification of the interface between DCS and settlement system is outside the scope of this standard.

  • Standard
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This draft European Standard applies to the on board and on board to ground communication services, i.e. it covers the data communication using digital interfaces:
a)   between functions implemented within the EMS;
b)   between EMS function and other on board subsystems;
c)   between EMS and ground communication services.
The on board data communication services of the EMS are covering the data exchange between functions of the EMS and the data exchange between EMS and other on board units, where data are exchanged using a communications protocol stack over a dedicated physical interface or a shared communication network.
The on board to ground communication services are covering the wireless data communication between the DHS and the on ground server.
Furthermore, this document includes conformity assessment requirements.

  • Standard
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Part 2 of EN 50126
* considers the safety-related generic aspects of the RAMS life-cycle. The guidance in this part is still applicable in the application of specific standards;
* defines methods and tools which are independent of the actual technology of the systems and subsystems;
* provides:
- the user of the standard with the understanding of the system approach to safety which is a key concept of EN 50126;
- methods to derive the safety requirements and their safety integrity requirements for the system and to apportion them to the subsystems;
- methods to derive the safety integrity levels (SIL) for the safety related electronic functions. Note that this standard does not allow the allocation of safety integrity levels to non-electronic functions.
* provides guidance and methods for the following areas:
- system life-cycles;
- systems safety assurance;
- risk assessment process;
- risk management process;
- application of risk acceptance principles and criteria;
- safety integrity concept.
* provides the user with the methods to assure safety with respect to the system under consideration and its interactions;
* provides guidance about the definition of the system under consideration, including identification of the interfaces and the interactions of this system with its subsystems or other systems, in order to conduct the risk analysis;
* addresses railway specifics;
* does not define:
- RAMS targets targets, quantities, requirements or solutions for specific railway applications;
- rules or processes pertaining to the certification of railway products against the requirements of this standard;
- an approval process by the safety authority.
* does not specify requirements for ensuring system security.
This part 2 of EN 50126 is applicable
* to all systems under consideration - as regards safety - within the entire railway system and the stakeholders involved;
* to the specification and demonstration of safety for all railway applications and at all levels of such an application, as appropriate, from complete railway systems to major systems and to individual and combined sub-systems and components within these major systems, including those containing software; in particular:
- to new systems;
- to new systems integrated into existing systems accepted prior to the creation of this standard, but only to the extent and insofar as the new system with the new functionality is being integrated. It is otherwise not applicable to any unmodified aspects of the existing system;
- as far as reasonably practicable, to modifications and extensions of existing systems accepted prior to the creation of this standard, but only to the extent and insofar as existing systems are being modified. it is otherwise not applicable to any unmodified aspect of the existing system;
- at all relevant phases of the life-cycle of an application;
- for use by railway duty holders and the railway suppliers.
It is not required to apply this standard to existing systems including those systems already compliant with any version of former EN 50126, which remain unmodified. Railway applications mean Command, Control & Signalling, Rolling Stock and Fixed Installations.

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This draft European Standard specifies the conformity assessment arrangements for newly manufactured EMS installed on a traction unit. This includes the integration conformity assessment and installation conformity assessment. In addition, this document also specifies the conformity assessment procedures for device and ancillary component replacement (e.g. due to damage in service), and periodic check to verify the EMS conformity assessment remains valid.
This draft European Standard does not include elements related to conformity assessment aspects other than design review and testing provisions for the products, processes or services specified. Consequently, this part does not delete, change or interpret the general requirements for conformity assessment procedures and vocabulary detailed in EN/ISO/IEC 17000.
This draft European Standard does not cover the conformity assessment schemes that, according to CENELEC Internal Regulations, are the responsibility of ISO policy committee "Committee on conformity assessment" (ISO/CASCO).

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This part 2 of EN 50126 - considers the safety-related generic aspects of the RAMS life-cycle; - defines methods and tools which are independent of the actual technology of the systems and subsystems; - provides: - the user of the standard with the understanding of the system approach to safety which is a key concept of EN 50126; - methods to derive the safety requirements and their safety integrity requirements for the system and to apportion them to the subsystems; - methods to derive the safety integrity levels (SIL) for the safety-related electronic functions. NOTE This standard does not allow the allocation of safety integrity levels to non-electronic functions. - provides guidance and methods for the following areas: - safety process; - safety demonstration and acceptance; - organisation and independence of roles; - risk assessment; - specification of safety requirements; - apportionment of functional safety requirements; - design and implementation. - provides the user of this standard with the methods to assure safety with respect to the system under consideration and its interactions; - provides guidance about the definition of the system under consideration, including identification of the interfaces and the interactions of this system with its subsystems or other systems, in order to conduct the risk analysis; - does not define: - RAMS targets, quantities, requirements or solutions for specific railway applications; - rules or processes pertaining to the certification of railway products against the requirements of this standard; - an approval process by the safety authority. This part 2 of EN 50126 is applicable to railway applications fields, namely Command, Control and Signalling, Rolling Stock and Fixed Installations, and specifically: - to the specification and demonstration of safety for all railway applications and at all levels of such an application, as appropriate, from complete railway systems to major systems and to individual and combined sub-systems and components within these major systems, including those containing software, in particular: - to new systems; - to new systems integrated into existing systems already accepted, but only to the extent and insofar as the new system with the new functionality is being integrated. It is otherwise not applicable to any unmodified aspects of the existing system; - as far as reasonably practicable, to modifications and extensions of existing systems accepted prior to the creation of this standard, but only to the extent and insofar as existing systems are being modified. It is otherwise not applicable to any unmodified aspect of the existing system; - at all relevant phases of the life-cycle of an application; - for use by railway duty holders and the railway suppliers. It is not required to apply this standard to existing systems which remain unmodified, including those systems already compliant with any former version of EN 50126. The process defined by this European Standard assumes that railway duty holders and railway suppliers have business-level policies addressing Quality, Performance and Safety. The approach defined in this standard is consistent with the application of quality management requirements contained within EN ISO 9001.

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This part 1 of EN 50126 - considers RAMS, understood as reliability, availability, maintainability and safety and their interaction; - considers the generic aspects of the RAMS life cycle. The guidance in this part can still be used in the application of specific standards; - defines: - a process, based on the system life cycle and tasks within it, for managing RAMS; - a systematic process, tailorable to the type and size of the system under consideration, for specifying requirements for RAMS and demonstrating that these requirements are achieved; - addresses railway specifics; - enables conflicts between RAMS elements to be controlled and managed effectively; - does not define: - RAMS targets, quantities, requirements or solutions for specific railway applications; - rules or processes pertaining to the certification of railway products against the requirements of this standard; - an approval process for the railway stakeholders. This part 1 of EN 50126 is applicable to railway application fields, namely Command, Control and Signalling, Rolling Stock and Fixed Installations, and specifically: - to the specification and demonstration of RAMS for all railway applications and at all levels of such an application, as appropriate, from complete railway systems to major systems and to individual and combined subsystems and components within these major systems, including those containing software; in particular: - to new systems; - to new systems integrated into existing systems already accepted, but only to the extent and insofar as the new system with the new functionality is being integrated. It is otherwise not applicable to any unmodified aspects of the existing system; - as far as reasonably practicable, to modifications and extensions of existing systems already accepted, but only to the extent and insofar as existing systems are being modified. It is otherwise not applicable to any unmodified aspect of the existing system; - at all relevant phases of the life cycle of an application; - for use by railway duty holders and the railway suppliers. It is not required to apply this standard to existing systems which remain unmodified, including those systems already compliant with any former version of EN 50126. The process defined by this European Standard assumes that railway duty holders and railway suppliers have business-level policies addressing Quality, Performance and Safety. The approach defined in this standard is consistent with the application of quality management requirements contained within EN ISO 9001.

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This European Standard applies to all electronic equipment for control, regulation, protection, diagnostic, energy supply, etc. installed on rail vehicles. For the purpose of this European Standard, electronic equipment is defined as equipment mainly composed of semiconductor devices and recognized associated components. These components will mainly be mounted on printed boards. Sensors (current, voltage, speed, etc.) and Semiconductor drive unit (SDU) for power electronic devices are covered by this standard. Complete Semiconductor drive unit (SDU) and power converters are covered by EN 61287 1. This European Standard covers the conditions of operation, design requirements, documentation, and testing of electronic equipment, as well as basic hardware and software requirements considered necessary for compliant and reliable equipment. Specific requirements related to practices necessary to ensure defined levels of functional safety will be determined in accordance with relevant railway safety standards. The software requirements for on board railway equipment are specified by EN 50657.

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This European Standard covers the requirements applicable to the Data Handling System (DHS) of an Energy Measurement System (EMS). This document also includes the basic requirements for the Data Collecting System (DCS) on-ground, relating to the acquisition and storage and export of Compiled Energy Billing Data (CEBD). The Conformity Assessment arrangements for the DHS and the DCS are specified in this document. The settlement system is outside the scope of this standard, and the specification of the interface between DCS and settlement system is outside the scope of this standard.

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This European Standard covers the requirements applicable to the Energy Measurement Function (EMF) of an Energy Measurement System (EMS) for use on board traction units for measurement of energy supplied directly from/to the Contact Line system. This European Standard also gives requirements for the Current Measurement Function (e.g. current sensor), the Voltage Measurement Function (e.g. voltage sensor) and the Energy Calculation Function (e.g. energy meter). The Conformity Assessment arrangements for the Voltage Measurement Function, Current Measurement Function, the Energy Calculation Function and a complete Energy Measurement Function are also specified in this document. The standard has been developed taking into account that in some applications the EMF can be subjected to legal metrological control. All relevant metrological aspects are covered in this part. Figure 2 shows the flow between the functional blocks of the EMF. Only connections between the functional blocks required by this standard are displayed. (...)

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This European Standard applies to the on board and on board to ground communication services, i.e. it covers the data communication using digital interfaces: a) between functions implemented within the EMS; b) between EMS function and other on board subsystems; c) between EMS and ground communication services. The on board data communication services of the EMS cover the data exchange between functions of the EMS and the data exchange between EMS and other on board units, where data are exchanged using a communications protocol stack over a dedicated physical interface or a shared communication network. The on board to ground communication services cover the wireless data communication between the DHS and the on ground server. Furthermore, this document includes conformity assessment requirements.

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