Bsi bs en 16704 2 1 2016

BS EN 16704-2-1:2016 BSI Standards Publication Railway applications — Track — Safety protection on the track during work Part 2-1: Common solutions and technologies — Technical requirements for Track Warning Systems (TWS) BS EN 16704-2-1:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 16704-2-1:2016 The UK participation in its preparation was entrusted to Technical Committee RAE/2, Railway Applications - Track A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2016 Published by BSI Standards Limited 2016 ISBN 978 580 85885 ICS 93.100 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2016 Amendments/corrigenda issued since publication Date Text affected BS EN 16704-2-1:2016 EN 16704-2-1 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM November 2016 ICS 93.100 English Version Railway applications - Track - Safety protection on the track during work - Part 2-1: Common solutions and technologies - Technical requirements for Track Warning Systems (TWS) Applications ferroviaires - Voie - Protection et sécurité durant des travaux sur la voie - Partie 2-1: Solutions communes et technologie - Exigences relatives aux dispositifs d'annonce des circulations (TWS) Bahnanwendungen - Oberbau - Sicherungsmaßnahmen während Gleisbauarbeiten - Teil 2-1: Allgemeine Lösungen und Technologien - Technische Anforderungen an Warnsysteme an Gleisen (TWS) This European Standard was approved by CEN on August 2016 CEN members are bound to comply with the CEN/CENELEC 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 application to the CEN-CENELEC Management Centre or to any CEN 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 CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 16704-2-1:2016 E BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) Contents Page European foreword Introduction Scope Normative references Terms and definitions 4.1 4.2 4.2.1 4.3 4.3.1 4.3.2 4.4 4.4.1 4.4.2 4.5 4.5.1 4.5.2 Functional requirements 11 Types of TWS 11 General functional requirements 11 System definition 11 LOWS 13 Lookout Operated Warning System (LOWS) 13 Lookout Operated Warning System with Influence Function (LOWS-I) 14 ATWS 15 Automatic Track Warning System ATWS 15 Automatic Track Warning System with Influence Function (ATWS-I) 16 SCWS 16 Signal Controlled Warning System (SCWS) 16 Signal Controlled Warning System with Influence Function (SCWS-I) 17 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.8.1 5.8.2 5.8.3 5.8.4 5.8.5 5.8.6 5.8.7 5.8.8 5.8.9 5.8.10 5.8.11 5.8.12 5.8.13 5.8.14 5.8.15 5.8.16 5.9 5.9.1 Non-functional requirements 17 Communication 17 Reliability 17 Availability 17 Maintainability 17 Functional Safety 17 Service Life 17 Safety for the user 18 Environment 18 General 18 Protection against dust and water (IP-Codes) 18 Pollution 18 Compatibility with Electromagnetic Current (EMC compatibility) 18 Power Supply 18 External connectors and cables 18 Altitude 18 Pulse Pressure 19 Temperature 19 Humidity 19 Wind 19 Snow and hail 19 Ice 19 Solar radiation 19 Lightning protection 19 Fire protection 19 Vibration and Shock 20 General 20 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) 5.9.2 5.9.3 5.10 5.11 5.12 5.13 5.14 5.15 5.16 5.17 5.18 5.18.1 5.18.2 5.19 5.19.1 5.19.2 5.19.3 5.20 5.21 5.22 5.23 Vibration 20 Shock 20 Dimension, mass, handling 20 Control elements of the TWS 20 Indication on the TWS 21 Technical processing time 21 TWS power supply and power consumption 22 Warning in case of a safety critical failure 22 Technical detection 22 Speed Range for detection components 22 TWS-Signal 22 Acoustic TWS-Signal 22 Optical TWS-Signals 23 Information by Human-Machine-Interface (HMI) 23 During operation 23 Priority of information on the HMI 23 Developing HMI 23 Data logging 23 User manual 24 Marking 24 Colour 25 Annex A (normative) Specification of acoustic warning signals 26 A.1 General 26 A.2 Sound criteria for acoustic TWS-Signals 26 A.3 Time criteria for acoustic TWS-Signals 27 Annex B (normative) Specification of optical TWS signals 28 B.1 General 28 Bibliography 29 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) European foreword This document (EN 16704-2-1:2016) has been prepared by Technical Committee CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2017, and conflicting national standards shall be withdrawn at the latest by May 2017 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN not be held responsible for identifying any or all such patent rights This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association This European Standard is one of the series EN 16704 “Railway applications – Track – Safety protection on the track during work” as listed below: — Part 1: Railway risks and common principles for protection of fixed and mobile work sites — Part 2-1: Common solutions and technology – Technical requirements for Track Warning Systems (TWS) — Part 2-2: Common solutions and technology – Technical requirements for barriers — Part 3: Competences of personnel related to work on or near the railway track According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) Introduction The purpose of this standard is to define the requirements for Track Warning Systems (TWS) used to warn people about approaching trains and rail vehicles when on or near the track during their work TWS can be subdivided into the following types: — LOWS – Lookout Operated Warning Systems; — ATWS – Automatic Track Warning Systems; — SCWS – Signal Controlled Warning Systems Each class can be used as a warning system by itself or with an additional function that can influence approaching trains and rail vehicles For instance LOWS-I, ATWS-I or SCWS-I (-I: influence function) This standard defines minimum system requirements for TWS BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) Scope This European Standard defines minimum functional and non-functional requirements for Track Warning Systems (TWS) used to warn persons about approaching trains and rail vehicles during their work on or near the track These systems may also have an additional function that can influence the approaching trains and rail vehicles The influence could be a stopping, passing or other function This European Standard is applicable to: — systems, sub-systems and components within TWS, including those containing software; — new TWS; — new integrations of systems, sub-systems and components into existing TWS; and — modifications of TWS developed according to this standard It is also recommended to use this standard for single warning units (e.g simple electrical horns) This European Standard does not apply to the following items: — hazards during the installation/removal of the TWS caused by trains and rail vehicles on the lines; — hazards caused by the improper use of TWS; — hazards caused by the improper behaviour of persons working on or near the track; — hazards caused by the (unauthorized) presence of persons on or near the track; — CO2-horns (tyfons), human operated pressure signal horns, flags, detonators or machine warning systems according to UIC 644; — national safety regulations to plan and operate TWS in track Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 894-3:2000+A1:2008, Safety of machinery - Ergonomics requirements for the design of displays and control actuators - Part 3: Control actuators EN 16704-1:2016, Railway applications – Track – Safety protection on the track during work – Part 1: Railway risks and common principles for protection of fixed and mobile work sites EN 50121-4, Railway applications – Electromagnetic compatibility – Part 4: Emission and immunity of the signalling and telecommunications apparatus EN 50125-3:2003, Railway applications - Environmental conditions for equipment - Part 3: Equipment for signalling and telecommunications EN 50126-1:1999, Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 1: Basic requirements and generic process BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) EN 50128, Railway applications – Communications, signalling and processing systems – Software for railway control and protection systems EN 50129, Railway applications - Communication, signalling and processing systems - Safety related electronic systems for signalling EN 50159, Railway applications - Communication, signalling and processing systems - Safety-related communication in transmission systems EN 60204-1, Safety of machinery - Electrical equipment of machines - Part 1: General requirements EN 60529, Degrees of protection provided by enclosures (IP Code) EN 61310-1, Safety of machinery - Indication, marking and actuation - Part 1: Requirements for visual, acoustic and tactile signals EN ISO 12100, Safety of machinery - General principles for design - Risk assessment and risk reduction (ISO 12100) Terms and definitions For the purposes of this document, the terms and definitions given in EN 16704-1:2016 and the following apply Figure — Overview TWS family 3.1 Track Warning System TWS system which warns people of approaching trains and rail vehicles when they are on or near the track These systems may also be able to influence the approaching trains and rail vehicles The influence could be a stopping, passing or other function BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) 3.2 human activated system TWS where the process for detecting approaching trains and rail vehicles is dependent on human interaction 3.3 technical activated system TWS where the process for detecting approaching trains and rail vehicles is independent of human interaction 3.4 Lookout Operated Warning System LOWS TWS which detects approaching trains and rail vehicles by human operated detection units including a vigilance control for human operated detection units 3.5 Automatic Track Warning System ATWS TWS which detects approaching trains and rail vehicles by technical means (e.g treadles, axle counters) 3.6 Signal Controlled Warning System SCWS TWS which detects approaching trains and rail vehicles by data from the signalling system 3.7 TWS-input step or steps in the process of a TWS which detect approaching and/or leaving trains and rail vehicles 3.8 TWS-communications step or steps in the process of a TWS which provide communications between TWS functional units (these can be wired and/or wireless) according to EN 50159 3.9 TWS-logic step or steps in the process of a TWS to process the input and to generate warning information for the output 3.10 TWS-output step or steps in the process of a TWS a) to warn people by TWS-Signals and/or b) to influence approaching trains and rail vehicles 3.11 TWS-Signals acoustic and/or optical signals to warn people on or near the track about approaching trains and rail vehicles 3.12 human detection detection activated by a person (e.g lookout) as input for TWS BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) 5.7 Safety for the user TWS shall be developed for safe use and operation according to EN ISO 12100 For electrical safety see EN 60204-1, for electrical creepage and clearance EN 50124-1 5.8 Environment 5.8.1 General TWS shall be designed for safe functioning in all environments that it is to be used, according to EN 50125-3 and EN 50121-4 NOTE For specification for other climate see standard of series EN 60721–3 and for testing see standard of series IEC/TR 60721–4 5.8.2 Protection against dust and water (IP-Codes) TWS components and sub-systems shall apply protection against dust and water (IP-Codes) according to EN 60529 — outdoor use: IP 65 — indoor use: IP 20 5.8.3 Pollution The effects of pollution shall be considered in the design of equipment and components according to EN 50125-3 5.8.4 Compatibility with Electromagnetic Current (EMC compatibility) TWS shall apply the requirements in accordance with standard of series EN 50121 5.8.5 Power Supply TWS should be able to use mains power supply of a range of 110 V AC to 240 V AC NOTE It is recommended to reach class of Table of EN 61000–2–4:2002 5.8.6 External connectors and cables Cables and connectors shall be non-halogenated Connectors should have a pull relief and locking system The cable link may consist of several cable units One cable unit consists of a cable of fixed length, a carrier device and connectors at each end of the cable It should be possible to bend the cable to a radius of 50 mm or less The cable should not be damaged by tensile loads of less than 500 N It should be possible to bolt the connectors together Each connector should be fitted with a built-in removable protective cap The cable connectors should guarantee at least 000 connection and disconnection operations 5.8.7 Altitude TWS shall work at an altitude according EN 50125-3:2003, class A1 18 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) 5.8.8 Pulse Pressure TWS should continue to work with a change or fluctuation of air pressure (e.g passing trains) in accordance with EN 50125-3 NOTE Clause Due to missing test procedures in EN 50125–3 this item is not part of the assessment required in 5.8.9 Temperature TWS shall work at a temperature range of class T1 according to EN 50125-3:2003 NOTE For testing see also EN 60068–2–1 and EN 60068–2–2 5.8.10 Humidity Sub-systems of TWS shall work in the complete air temperature range of subclause 5.8.8 at a humidity level of class T1 according to EN 50125-3:2003 NOTE 5.8.11 For testing see also EN 60068–2–56 Wind Equipment exposed to air movement shall be designed to withstand the stress generated according to EN 50125-3 NOTE 5.8.12 For more information see also EN 14067–4, EN 14067–5 and EN 14067–6 Snow and hail Consideration shall be given to the effect of snow and/or hail 5.8.13 Ice Equipment exposed to the effects of ice forming or falling shall be designed to operate in that environment according to EN 50125-3 5.8.14 Solar radiation Equipment exposed to the effects of solar radiation shall be designed to ensure that it continues to operate and comply with the parameters of the design specifications according to EN 50125-3 NOTE 5.8.15 For testing see also EN 60068–2–5 Lightning protection Consideration shall be given to the effects of lightning on the equipment according to EN 50125-3 NOTE 5.8.16 For testing see also EN 61000–4–5 Fire protection The level of fire protection should be stated in the relevant product information The materials of the systems shall be non-flammable or self-extinguishing and in this case shall not release corrosive smoke 19 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) 5.9 Vibration and Shock 5.9.1 General TWS sub-systems shall be tested against random vibration and shock according to their position in track During and directly after the tests against vibration and shock the system shall be and stay in the “ONmode” and should maintain safe and reliable operation Signs of deterioration are allowed as long as the safe and reliable functionality is not affected NOTE For testing see also EN 60068–2–6 5.9.2 Vibration For the random tests of vibrations see Table of EN 50125-3:2003 For vibrations, 30 tests must be carried out on each axis NOTE NOTE For use of equipment on a vehicle or machine see also EN 50125–1 and EN 50155 For testing see also EN 60068–2–64 5.9.3 Shock For testing against shock see EN 50125-3:2003, Table For the shock tests shocks per direction shall be carried out NOTE For testing see also EN 60068–27 5.10 Dimension, mass, handling Portable TWS and its components should be designed for transportation, mounting and operation by one person Components of a mass of more than 20 kg should be designed demountable in components of less than 20 kg If this is not possible, parts of more than 20 kg shall be equipped with handles for transport and use Handles shall be in accordance with EN 894-3:2000+A1:2008, 8.1 (length > 100 mm, diameter 15 mm to 35 mm), they shall be easily accessible and near to the balance point The handles are to be positioned to ensure the sharing of the mass equally The mass on each handle shall not exceed 20 kg If more than one person is recommended for transportation, mounting and operation the number of people necessary shall be indicated on the component 5.11 Control elements of the TWS TWS shall be constructed for safe use and operation Control elements should be designed according to EN 894-3 Control elements shall be distinctive, clearly and durably marked and except for control elements for the TWS emergency signal they shall be protected against accidental activation TWS shall be constructed such that operational settings are secured and can only be changed by authorized persons via software or hardware TWS shall have at least the following control elements or capabilities (available via software or hardware, e.g on a HMI): — On/Off-Switch; — setting of TWS; — activating the TWS-Signals (Wa 1, Wa (see Annex A.3)); 20 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) — activating of the emergency signal (Wa3 (see Annex A.3)) preferably by a pushbutton; — cancellation of the TWS-Signals Control elements for vigilance (dead man’s button) and human activating of warning signals (including influence function), shall be designed for operation with protective gloves 5.12 Indication on the TWS TWS shall indicate the following information using indicators or a display (on change or on demand): — operation status; — type of safety critical failure and failure; — current TWS warning status TWS should indicate the following information using indicators or a display: — TWS signals setting (Wa1, Wa2; acoustic and/or optical); — influence function (only for TWS-I); — next maintenance and service; — quality of radio transmission Safety relevant information shall be indicated visually and acoustically preferably on a control unit of the TWS The display / indication shall be low-reflective and easily readable by day and night The colour used for information shall comply with the standardized colour-codes of EN 61310-1 TWS shall give an acoustic signal for a TWS-Operator preferable on a control unit concerning: — indication of change of current TWS warning status; — indication of a safety critical failure and failure; — indication “influence function” (only TWS-I) 5.13 Technical processing time TWS shall not exceed a technical processing time of more than s before a TWS-Signal is given in all cases including: — technical and human detection of approaching of trains or rail vehicles; — provision of train position information via signalling input to the TWS; — detection of activation of the emergency pushbutton; — identification of a safety critical failure; — activation of a warning message from any vigilance control system 21 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) 5.14 TWS power supply and power consumption The manufacturer shall state the power consumption of the system for the following parameters: — at least 15 acoustic TWS-Signals at maximum sound pressure level within one hour; — during each acoustic TWS-Signal, an optical TWS-Signal shall be displayed and continued after the extinction of the acoustic TWS-Signal The manufacturer shall state the capacity of the batteries used in the system In the event of a safety critical failure of the power supply the TWS shall continue to operate safely or fail-safe 5.15 Warning in case of a safety critical failure In case of any safety critical failure the regular acoustic TWS-Signal (Wa1, Wa2) shall be given by all available warning units and the optical TWS-Signal by all available optic warning units for at least 30 Information of the changed operational status and kind of failure shall be indicated on the TWS NOTE The minimum time of 30 is required to give the responsible person the time to inform all staff within an extended work-site 5.16 Technical detection Technical detection shall detect the direction of passing trains and rail vehicles on the front side leading edge of the train (e.g on the first axle) 5.17 Speed Range for detection components Detectors shall detect passing trains and rail vehicles from km/h up to at least 180 km/h NOTE This includes a safety margin for lines with a speed limit of 160 km/h Technical detection shall not be compromised by trains or rail vehicles running at the maximum speed given by the railway infrastructure manager 5.18 TWS-Signal 5.18.1 Acoustic TWS-Signal Acoustic TWS-Signals shall comply with Annex A (normative) of this standard Units for acoustic TWS-Signals shall reach a sufficient sound pressure level to guarantee the audibility of the warning signal (at the ear of the worker: at least +3 dB) above the maximum sound pressure level of the ambient noise The sound pressure level of each unit should be adapted automatically to the ambient noise of the work site (ALADIN – Automatic Level Adaption Due to Identified Noise) in a range of at least 30 dB either continuously or in steps of max dB Peaks of the noise with a duration of less than s should have no effect on this adaption The operational limitations of the TWS have to be part of the manufacturer's manual, i.e.: — maximum distance of warning units; — maximum permitted sound pressure level of the noise (as a function of distances of the warning units) 22 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) According to EN ISO 7731 the A-weighted sound-pressure level of the TWS-Signal shall not be lower than 65 dB at any position in the warning area to ensure the audibility NOTE 5.18.2 Acoustic planning of a work site is part of EN 16704–1:2016, A.3.5 Optical TWS-Signals Optical TWS-Signals shall comply with Annex B (normative) of this standard The colour of the optical signal of TWS shall be in accordance with the requirements of the national and operational rules 5.19 Information by Human-Machine-Interface (HMI) 5.19.1 During operation An HMI shall display the following information without any interaction of the TWS-Operator: — state of operation (in operation, out of operation, safety critical failure); — warning (no warning (train), one warning (train), more than one warning (train)); — status of power supply On request of the TWS-Operator the HMI shall display additional information on the type of the safety critical failure or failure 5.19.2 Priority of information on the HMI Safety critical failures shall be displayed on the HMI Non safety critical failures shall be displayed on the HMI subordinated to safety critical failure Safety critical failures and non-safety critical failures displayed on the HMI shall not be masked by any other information without intentional interaction of the TWS-Operator 5.19.3 Developing HMI HMI should be developed with ergonomic considerations 5.20 Data logging TWS shall store relevant data in a secure data recorder / black box with timestamp (year, month, day, hour, minute, second) for at least 168 h of operation The data shall be accessible and readable without interaction from the manufacturer This relevant data includes: — status; — operational settings; — detection; — status warning information; — status power supplies; — safety critical failures, non-safety critical failures 23 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) 5.21 User manual The user manual shall contain aspects for operation, handling, (including transport, mounting and demounting) maintenance, environmental conditions and disposal of TWS The user manual shall also contain the Safety Related Application Conditions (SRAC) according to EN 50129 but should not include national operational rules It shall include at least: a) a description of the construction and functioning; b) functional operating instructions in the appropriate language; c) description of safety critical failure mode and advice on immediate actions required; d) description of failure mode and advice on immediate actions required; e) instructions for the installation of detection units; f) routine maintenance including any special precautions and periodicity; g) maintenance by the certified companies and periodicity; h) technical information on: — power supply; — minimum and maximum detectable speed; — maximum passing speed; — mass of the components; — additional tools; i) j) — range of sound pressure level of the warning units instructions for disposal including safety and handling precautions and recommendations; drawings, illustrations and data enabling all component parts to be readily identified and to allow procurement for replacement purposes; k) a note for relevant rules (use also as proposal of best practice); l) contact information of the manufacturer; m) limitations of use Separate, compact and durable user instructions should be provided with each TWS for use at work sites 5.22 Marking Components shall be marked with a unique, distinctive and long-lasting identification It shall be possible to identify the date of the next maintenance by a label or by software as far as necessary Acoustic warning units shall be marked additionally with the maximum sound pressure level 24 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) Technical detection units shall be marked with necessary data to avoid improper use 5.23 Colour Components that are used on the track should be coloured so that they are visible and it is possible for persons to identify them as an obstacle to avoid accidents, preferably in “yellow” in accordance with the requirements of ISO 3864-2:2004, Figure 22 with the values x = 0,487 and y = 0,475 NOTE This colour corresponds, for example to: — RAL 1004; — or to the NCS (Natural Colour System) target value 1080-Y10 R; — or to the NCS exact value 1475-Y 11R; — or to EC 222.69.79 in the Eurocolour table 25 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) Annex A (normative) Specification of acoustic warning signals A.1 General This annex specifies the acoustic warning signals (TWS-Signals) of Track Warning Systems (TWS) to warn people during their work on or near the track about the approaching of trains and rail vehicles using acoustic and optical TWS-Signals These requirements have to be applied for LOWS, ATWS SCWS and combined systems and for single warning units/warning devices concerning the signal Wa1, Wa2, Wa3 A.2 Sound criteria for acoustic TWS-Signals The TWS-Signals are defined by the following sound criteria: — The TWS-Signal comprises of two different alternating signal-sequences S1 and S2 with a duration of 250 ms each and the basic frequency of fG = 436 Hz ± Hz for S1 und fG = 660 Hz ± 10 Hz for S2 — The signal-sequences shall have a high harmonic content The high harmonic content codetermines the audio impression and is intended to guarantee the audibility of the warning signal even in case of masking noise — All harmonic up to kHz should be part of both signal-sequences — The spectral maximum of the energy shall be the frequency-range between kHz and 1,6 kHz — The level of the basic frequency of fG = 660 Hz shall not be less than 15 dB below the first harmonic — The level of the basic frequency of fG = 436 Hz shall not be less than 25 dB below the first harmonic — The overall level of both signal-sequences S1 and S2 including all relevant harmonics shall differ not more than dB(A) NOTE Details concerning measuring specification (maximum sound pressure level, stability of sound pressure level, directional characteristic, measuring condition) will be fixed later NOTE The necessary harmonic content can be achieved by creating rectangular signals The signal-sequences can be achieved by stringing together three rectangular signals with a duration of T1, T2 and T3 and repeating them to a duration of 250 ms NOTE For sequence S1 and S2 the following values for T1, T2 and T3 are possible: — S1: T1 = 1,043 ms, T2 = 0,771 ms and T3 = 0,499 ms; — S2: T1 = 0,771 ms, T2 = 0,363 ms and T3 = 0,363 ms This signal has to be modified due to the characteristics of the warning devices, if necessary 26 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) A.3 Time criteria for acoustic TWS-Signals The TWS-Signals are defined by the following time criteria The duration of TWS-Signal is: — Wa 1: s warning signal W; — Wa 2: s W + s Pause P + s W; — Wa 3: s W + 0,5 s P + s W + 0,5 s P + s W + 0,5 s P +… (minimum duration s) Infrastructure manager can define which warning signals shall be used on their network Figure A.1 — Temporal structure of the warning signals 27 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) Annex B (normative) Specification of optical TWS signals B.1 General The optical TWS-Signal shall start when a train or rail vehicle or a malfunction is detected It shall end when in the warning area there is no train or rail vehicle or the malfunction is over Optical TWS-Signals shall use light pulses with a frequency of Hz to Hz or the equivalent for rotating or flashing lights For detailed information concerning optical signals, see EN 842 NOTE The perceptibility of optical TWS-Signals depends on the effective luminance of the lamps, which can be given by the manufacturer as value for energy (Ws) or light intensity (cd) NOTE 28 The colour of the lamp cover has an effect on the effective luminance BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) Bibliography [1] [2] [3] [4] [5] EN 14067-4, Railway applications - Aerodynamics - Part 4: Requirements and test procedures for aerodynamics on open track EN 14067-5, Railway applications – Aerodynamics – Part 5: Requirements and test procedures for aerodynamics in tunnels EN 14067-6, Railway applications - Aerodynamics - Part 6: Requirements and test procedures for cross wind assessment EN 50121-1, Railway applications – Electromagnetic compatibility – Part 1: General EN 61000-2-4, Electromagnetic compatibility (EMC) - Part 2-4: Environment - Compatibility levels in industrial plants for low-frequency conducted disturbances [6] EN 61000-4-14, Electromagnetic compatibility (EMC) - Part 4-14: Testing and measurement techniques - Voltage fluctuation immunity test for equipment with input current not exceeding 16 A per phase [7] EN ISO 11201, Acoustics - Noise emitted by machinery and equipment - Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections (ISO 11201) [8] EN 60068-2-1, Environmental testing - Part 2-1: Tests - Test A: Cold [9] [10] [11] [12] [13] [14] [15] EN 60068-2-2, Environmental testing - Part 2-2: Tests - Test B: Dry heat EN 60068-2-5, Environmental testing – Part 2-5: Tests – Test Sa: Simulated solar radiation at ground level and guidance for solar radiation testing (IEC 60068-2-5) EN 60068-2-6, Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal) EN 60068-2-27, Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock EN 60068-2-64, Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance EN 60068-2-78, Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state EN 60721-3, Classification of environmental conditions – Part 3: Classification of groups of environmental parameters and their severities (IEC 60721-3) [16] IEC/TR 60721-4, Classification of environmental conditions – Part 4: Guidance for the correlation and transformation of the environmental condition classes of IEC 60721-3 to the environmental tests of IEC 60068 (several parts) [17] EN 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement techniques - Surge immunity test (IEC 61000-4-5) [18] UIC 644, Warning Devices used on Tractive Units Employed on International Service 29 BS EN 16704-2-1:2016 EN 16704-2-1:2016 (E) [19] [20] [21] UIC 730-3, Automatic warning of track maintenance gangs ERRI A158 Part I, Specification for individual and gang warning systems for personnel working on the track” (1996), European Rail Research Institute (ERRI) ERRI A158 Part II, Explanatory comments on the specification for individual and gang warning systems for personnel working on the track” (1996), European Rail Research Institute (ERRI) [22] EN 842, Safety of machinery – Visual danger signals – General requirements, design and testing [24] prEN 15746-3:2015, Railway applications - Track - Road-rail machines and associated equipment - Part 3: Technical requirements for running [23] 30 EN 14033-1, Railway applications - Track - Railbound construction and maintenance machines Part 1: Technical requirements for running This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British 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