I.S. EN 50617-1:2015

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 Description of train detection system
5 Safety relevance of parameters
6 Technical track circuit parameters
7 Train based parameter - Shunt impedance
8 Track based parameters
9 Environmental and other parameters
Annex A (informative) - Guidance for usual safety relevance
        of parameters
Annex B (informative) - Scenarios for non-detection zone
Annex C (informative) - Track circuit length
Annex D (informative) - Scenarios for broken rail Relation
        Track circuit - Broken rail detection
Annex E (informative) - Frequency management
Annex F (informative) - Vehicle Impedance/guidance for RST
        design to support the FrM
Annex G (informative) - Example of elements of maintenance
        for existing track circuits
Annex H (informative) - Example of management of shunt
        impedance
Annex I (informative) - Rail to ground impedance: Track
        Circuit Effects
Annex J (informative) - Example of mechanical test for IRJ
Annex K (informative) - Example of existing requirement for
        the type of sleepers/track structure
Annex L (informative) - Example of application for different
        safety requirements
Annex ZZ (informative) - Relationship between this European
         Standard and the Essential Requirements of
         EU Directive 2008/57/EC
Bibliography

Defines the technical parameters of track circuits associated with the disturbing current emissions limits for RST in the context of interoperability defined in the form of Frequency Management.