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eLibrary > BS EN 50617-1:2024 - TC Tracked Changes. Railway applications. Technical parameters of train detection systems for the interoperability of the trans-European railway system - Track circuits >

BS EN 50617-1:2024 - TC Tracked Changes. Railway applications. Technical parameters of train detection systems for the interoperability of the trans-European railway system - Track circuits, 2025

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BS EN 50617-1:2024 - TC Tracked Changes. Railway applications. Technical parameters of train detection systems for the interoperability of the trans-European railway system - Track circuits, 2025

30505270
A-30422213 [Go to Page]
National foreword
1 Scope
2 Normative references
3 Terms, definitions and abbreviations [Go to Page]
3.1 Terms and definitions
3.2 Abbreviations
4 Description of train detection system
5 Safety relevance of parameters
6 Technical track circuit parameters [Go to Page]
6.1 Dynamic shunt impedance [Go to Page]
6.1.1 General
6.1.2 Requirements
6.2 TC non-detection zone [Go to Page]
6.2.1 General
6.2.2 Requirements
6.3 Track circuit length [Go to Page]
6.3.1 General
6.3.2 TC minimum length of detection - Requirement
6.3.3 TC maximum length of detection - Requirement
6.4 Broken rail detection [Go to Page]
6.4.1 General
6.4.2 Requirements
6.5 IRJ failure detection [Go to Page]
6.5.1 General
6.5.2 Requirement
6.6 Frequency management and relevant parameters of the track circuit [Go to Page]
6.6.1 Frequencies and immunity limits [Go to Page]
6.6.1.1 General
6.6.1.2 Requirements for out of band limits
6.6.2 Validation of immunity [Go to Page]
6.6.2.1 Introduction
6.6.2.2 Track circuit receiver immunity test in laboratory
6.6.2.3 Test configuration in laboratory
6.6.2.4 Testing equipment specification
6.6.2.5 Testing procedure
6.6.2.6 In situ validation of the laboratory tests / field tests
6.6.2.7 Requirements
6.6.3 Number of operational channels
6.6.4 Separation between operational channels / channel bandwidth
6.7 Coding [Go to Page]
6.7.1 General
6.7.2 Type of coding [Go to Page]
6.7.2.1 Fixed coding
6.7.2.2 Dynamic coding
6.7.2.3 Principle for a frequency shift keying method
6.7.3 Requirements
6.8 Response of the receiver to transient disturbances [Go to Page]
6.8.1 General
6.8.2 Switched sinusoidal signal
6.8.3 Other signals
6.8.4 Validation of the response of the receiver to transient disturbances
6.9 RAMS [Go to Page]
6.9.1 Reliability
6.9.2 Availability [Go to Page]
6.9.2.1 General
6.9.2.2 Requirements
6.9.3 Maintainability [Go to Page]
6.9.3.1 General
6.9.3.2 Requirements
6.9.4 Safety
6.9.5 Validation of all RAMS parameters
7 Train based parameter – Maximum allowed shunt impedance [Go to Page]
7.1 General
7.2 Requirements
8 Track based parameters [Go to Page]
8.1 Total impedance of the track [Go to Page]
8.1.1 General
8.1.2 Requirements
8.2 Rail to Earth impedance [Go to Page]
8.2.1 General
8.2.2 Limits and requirements [Go to Page]
8.2.2.1 Introduction
8.2.2.2 Ground impedance: track circuits
8.2.2.3 Ground impedance: local contamination
8.2.2.4 Ground impedance: Corrosion
8.2.2.5 Ground impedance: touch potential
8.3 Insulation value of IRJ [Go to Page]
8.3.1 General
8.3.2 Requirements and validation [Go to Page]
8.3.2.1 Method of validation
8.3.2.2 Electrical test
8.3.2.3 Mechanical test
8.4 Type of sleepers / track structure [Go to Page]
8.4.1 General
8.4.2 Definition of the parameter
8.4.3 Requirement and validation
8.5 Ballast resistance [Go to Page]
8.5.1 General
8.5.2 Definition of the parameter
8.5.3 Requirements for validation
8.5.4 Requirements and validation
8.6 Unbalance of the return current [Go to Page]
8.6.1 General
8.6.2 Requirements and validation
9 Environmental and other parameters [Go to Page]
9.1 Signalling power supply quality with respect to availability [Go to Page]
9.1.1 General
9.1.2 Requirements and validation
9.2 Traction power supply quality [Go to Page]
9.2.1 General
9.2.2 Definition of the parameter
9.2.3 Requirements and validation
9.3 Amount of sand [Go to Page]
9.3.1 General
9.3.2 Definition of parameter
9.3.3 Requirements for validation
9.4 Weather, ice and other environmental conditions [Go to Page]
9.4.1 General
9.4.2 Temperature [Go to Page]
9.4.2.1 General
9.4.2.2 Ambient temperature for track circuit evaluator component – Requirements and validation
9.4.2.3 Ambient temperature for track circuit trackside equipment – Requirements and validation
9.4.3 Pressure/Airflow [Go to Page]
9.4.3.1 General
9.4.3.2 Requirements and validation
9.4.4 Humidity [Go to Page]
9.4.4.1 General
9.4.4.2 Requirements and validation
9.4.5 Precipitation [Go to Page]
9.4.5.1 General
9.4.5.2 Rain
9.4.5.3 Snow
9.4.5.4 Hail
9.4.5.5 Ice
9.4.6 Solar radiation
9.4.7 Protection level (IP)
9.4.8 Vibrations / shock [Go to Page]
9.4.8.1 General
9.4.8.2 Requirements and validation
9.5 EMC [Go to Page]
9.5.1 General
9.5.2 Requirement and validation for EMC with respect to vehicles
9.5.3 Requirement and validation for EMC with radio-transmitters
9.6 Requirement and validation for overvoltage protection (including indirect lightning effects)
Annex A (informative) Guidance for compliance and assessment of the parameters
Annex B (informative) Scenarios for non-detection zones [Go to Page]
B.1 Non-detection zone in S&C area between staggered isolated rail joints (distance x in Figure B.1)
B.2 Overlap of a dead zone in S&C area
B.3 Equipotential wires in S&C area
B.4 Zone without detection in electrical joints
Annex C (informative) Track circuit length [Go to Page]
C.1 Introduction
C.2 Example of TC with S-bond [Go to Page]
C.2.1 Introduction
C.2.2 TC Minimum length relating to RST
Annex D (informative) Scenarios for broken rail Relation Track circuit – Broken rail detection [Go to Page]
D.1 Basic principle
D.2 Fail safe system
D.3 Examples where the broken rail detection is not possible [Go to Page]
D.3.1 S&C area
D.3.2 Single rail isolation
D.3.3 Parallel paths of other tracks circuits or (and) earthing connections
Annex E (informative)Frequency management – User manual [Go to Page]
E.1 Frequencies and immunity limits
E.2 Compatibility case structure
Annex F (informative)Example of elements of maintenance for existing track circuits
Annex G (informative)Example of management of shunt impedance
Annex H (informative)Rail to ground impedance: Track circuit effects [Go to Page]
H.1 Physical factors
H.2 Symmetric rail- ground resistance
H.3 Values from experience
H.4 Asymmetric rail- ground resistance
H.5 Touch Potential Effects
Annex I (informative)Example of mechanical test for IRJ [Go to Page]
I.1 General
I.2 Testing program
Annex J (informative)Example of existing requirement for the type of sleepers / track structure [Go to Page]
J.1 General
J.2 Minimum value for a ballast resistance
J.3 Infrabel
J.4 DB [Go to Page]
J.4.1 Wooden sleepers
J.4.2 Concrete sleepers
J.4.3 Slab tracks
Annex K (informative)Out of Band Limits (OOB) proposal [Go to Page]
K.1 Introduction
K.2 Out of band emission limits for influencing unit: DC power systems [Go to Page]
K.2.1 OOB definitions
K.2.2 OOB evaluation method
K.2.3 Maximum characteristic substation harmonics for out of band - Zone 1 (examples)
K.3 Out of band emission limits for influencing unit: 25 kV 50 Hz AC power systems [Go to Page]
K.3.1 OOB definitions
K.3.2 OOB evaluation method
K.4 Validation of OOB limits based on OOB magnetic fields limits defined in ERA/ERTMS/033281 v.4.0
Annex L (informative)Informative table describing the correspondence between this European Standard and the Commission Regulation (EU) N° 2016/919 on the technical specification for interoperability relating to the control-command and signalling subsystem [Go to Page]
L.1 Introduction
L.2 Table of correspondence [Go to Page]

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