1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50556:2011Road traffic signal systemsBS EN 50556:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50556:2011. It supersedes BS 798
2、7:2001+A1:2006, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee EPL/526, Road traffic control signals.A list of organizations represented on this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
3、 necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 70728 5 ICS 93.080.30 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and S
4、trategy Committee on 30 April 2011.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 50556:2011EUROPEAN STANDARD EN 50556 NORME EUROPENNE EUROPISCHE NORM February 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique E
5、uropisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50556:2011 E ICS 93.080.30 Supersedes HD 638 S1:2001 + A1:2006English vers
6、ion Road traffic signal systems Systmes de signaux de circulation routire Straenverkehrs-Signalanlagen This European Standard was approved by CENELEC on 2011-01-02. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European S
7、tandard 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 Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English,
8、French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgi
9、um, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS
10、 EN 50556:2011EN 50556:2011 - 2 - Foreword This European Standard was prepared by CENELEC Task Force BTTF 69-3, Road traffic signal systems. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50556 on 2011-01-02. This document supersedes HD 638 S
11、1:2001 + A1:2006. The main changes with respect to HD 638 S1:2001 + A1:2006 are the following: update of the normative-references; editorial revision; reduction of the classes; adaptation to the level of technology. Attention is drawn to the possibility that some of the elements of this document may
12、 be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop)
13、2012-01-02 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-01-02 _ BS EN 50556:2011- 3 - EN 50556:2011 Contents Introduction 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions 7 4 Electrical supply and limits . 10 4.1 Nominal voltages
14、 10 4.2 Operating voltage range . 10 4.3 Low voltage . 11 4.4 Overvoltage . 11 4.5 Voltage dip 11 4.6 Mains frequency 11 5 Safety . 12 5.1 Electrical safety . 12 5.2 Traffic safety . 14 6 Testing . 19 6.1 General . 19 6.2 Organisation of testing 19 6.3 Environmental tests 20 6.4 Electrical tests . 2
15、2 6.5 Electrical safety tests 23 6.6 Traffic safety tests . 24 6.7 Electromagnetic compatibility testing 25 7 Electrical interfaces 26 7.1 General . 26 7.2 Detector interface 26 8 Installation . 26 8.1 General . 26 8.2 Tests carried out during installation 26 8.3 Test of cables following the install
16、ation of cables . 27 8.4 Inspection of terminations following the installation and termination of all equipment and cables . 27 8.5 Test of impedance 27 8.6 Insulation of live parts to earth 28 8.7 RCD (residual current detector / earth leakage breaker) 28 8.8 Fuses 28 8.9 Voltage and polarity of su
17、pply . 28 8.10 Connections between controllers, signals and ancillary equipment 29 8.11 Safety covers 29 8.12 Functional check of road traffic signal systems 29 9 Maintenance 29 9.1 General . 29 BS EN 50556:2011EN 50556:2011 - 4 - 9.2 Types of maintenance . 29 9.3 Documentation required for maintena
18、nce . 29 9.4 Equipment not covered by this standard . 30 9.5 Safety testing procedures . 30 9.6 Maintenance testing procedures . 30 10 Marking and labelling . 32 11 Classification of environmental test conditions 33 Figure Figure 1 Failure consideration of a Road Traffic Signal System Protection aga
19、inst accidents caused by technical failures .18Tables Table 1 Classification according to voltage dip 11Table 2 Requirements for maintenance measures (intervals (PTI) in months) .31Table 3 Environmental testing .33BS EN 50556:2011- 5 - EN 50556:2011 Introduction To satisfy the legal and regulatory r
20、equirements and specific provisions of each CENELEC country, certain characteristics in this standard contain a range which is defined by a number of discrete classes. The class to be used in the country will be selected by the Standards Authority of the CENELEC member of that country from the range
21、 specified. Thus this European Standard contains the essential electrotechnical requirements of all CENELEC countries and permits through the class selection procedure, countries to incorporate their own requirements. It is believed that this first step will allow, over a period of time, a gradual a
22、lignment of Road Traffic Signal Systems in Europe. BS EN 50556:2011EN 50556:2011 - 6 - 1 Scope This European Standard specifies requirements for Road Traffic Signal Systems, including their development, design, testing, installation and maintenance. In particular, it forms the electrotechnical part
23、of the following two standards issued by CEN: EN 12368, Traffic control equipment Signal heads EN 12675, Traffic signal controllers Functional safety requirements Each of these standards above should be used with this standard either singly or together to define an operational equipment or system. T
24、his should be achieved by using the electrotechnical methods and testing defined in this standard. Where Road Traffic Signal Systems are to be used with other systems, e.g. public lighting or railway signalling and communication, this standard should comply with the other respective standard to ensu
25、re that overall safety is not compromised. Only permanently or temporarily installed Road Traffic Signal Systems are included in this standard. Central office and portable signalling systems are not covered. 2 Normative references The following referenced documents are indispensable for the applicat
26、ion of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12368 Traffic control equipment - Signal heads EN 12675:2000 Traffic signal controllers - Functional safety require
27、ments EN 50102 Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code) EN 50110-1 Operation of electrical installations EN 50129 Railway applications - Communication, signalling and processing systems - Safety related electronic systems for
28、 signalling EN 50293 Electromagnetic compatibility - Road traffic signal systems - Product standard EN 60529 Degrees of protection provided by enclosures (IP Code) (IEC 60529) EN 60950-1:2006 Information technology equipment - Safety - Part 1: General requirements (IEC 60950-1:2005, mod.) EN 61008 s
29、eries Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs) (IEC 61008 series) EN 61009 series Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) (IEC 61009 series)
30、 EN ISO 9001:2008 Quality management systems - Requirements (ISO 9001:2008) HD 384.4 series Electrical installations of buildings - Part 4: Protection for safety (IEC 60364-4 series) HD 60364-5-54 Low-voltage electrical installations - Part 5-54: Selection and erection of electrical equipment - Eart
31、hing arrangements, protective conductors and protective bonding conductors (IEC 60364-5-54) EN 60068-2-1 Environmental testing - Part 2-1: Tests - Test A: Cold (IEC 60068-2-1) EN 60068-2-2 Environmental testing - Part 2-2: Tests - Test B: Dry heat (IEC 60068-2-2) EN 60068-2-5 Environmental testing -
32、 Part 2: Tests - Test Sa: Simulated solar radiation at ground level (IEC 60068-2-5) BS EN 50556:2011- 7 - EN 50556:2011 EN 60068-2-14 Environmental testing - Part 2-14: Tests - Test N: Change of temperature (IEC 60068-2-14) EN 60068-2-30 Environmental testing - Part 2-30: Tests - Test Db: Damp heat,
33、 cyclic (12 h + 12 h cycle) (IEC 60068-2-30) EN 60068-2-64 Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance (IEC 60068-2-64) EN 61140 Protection against electric shock - Common aspects for installation and equipment (IEC 61140) CLC/TS 50509 Use of LED sign
34、al heads in road traffic signal systems IEC 60050-191 International Electrotechnical Vocabulary - Chapter 191: Dependability and quality of service IEC 60050-826 International Electrotechnical Vocabulary - Part 826: Electrical installations IEC 60183 Guide to the selection of high-voltage cables IEC
35、 60417 (database) Graphical symbols for use on equipment 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 General 3.1.1 Road Traffic Signal Systems include systems and devices, provided they are affiliated to them in terms of circuitry NOTE Th
36、ey may consist of the following elements which is not in itself a complete list: Controllers; Signal heads, signalling devices and traffic signs e.g. signal heads for traffic signals; acoustic signal generators; mechanical signal generators; traffic signs connected to the Road Traffic Signal System;
37、 Traffic sensors and detectors e.g. request push buttons; vehicle detectors / Pedestrian Detectors; Monitoring equipment e.g. photographic monitoring devices; Equipment Enclosures; Electrical Supply; Cables; Interconnections; Supports. 3.1.2 Failure Mode Analysis means of examining all failure modes
38、 to ensure that signal states endangering the road users and/or risk of electrical hazard cannot occur during normal conditions of operation of a Road Traffic Signal System or if they do occur as a result of or whilst a failure (failure mode) exists that they signal states endangering the road users
39、 are detected and prevented from continuing 3.1.3 Signal Safeguarding Facility facilities intended to prevent states of signals endangering the traffic BS EN 50556:2011EN 50556:2011 - 8 - 3.1.4 monitoring element device that signals electrical and mechanical states of equipment, preferably for signa
40、l circuits, and which converts the obtained information in such a manner that it can be processed in signal safeguarding facilities 3.1.5 hardware complete Road Traffic Signal System or a (material) part of it 3.1.6 hardware fault failures of components and any influence that will cause the equipmen
41、t to fail NOTE Systematic hardware faults constitute either design faults or systematic production faults. 3.1.7 software all or part of the sequence instructions for a Road Traffic Signal System including the affiliated documentation NOTE Software is exclusively immaterial, so that it is subject to
42、 no wear or failure mechanisms. Once implemented, software cannot be falsified on its own. 3.1.8 software error deviation between the realised and intended functional contents of the software NOTE All errors in the software are systematic errors. They are caused by: invalid specification (incorrect
43、formulation of intention); incorrect programming (incorrect translation of the specification to sequential instructions). Apparent program falsification in memories is produced by hardware faults or failures or is caused by inadmissible influencing. 3.2 Traffic engineering 3.2.1 controllers (traffic
44、) electrical device to control signals 3.2.2 signal group sequence of conditions applied to a group of signal heads, which always received identical signal light indications 3.2.3 Operating System principle software that allows a computer to operate, and which establishes the basic foundations, prot
45、ocols and functions that the computer can perform, including communication with internal and external resources 3.2.4 Application Program software that determines specific tasks that a computer can perform, i.e. operate as a traffic controller NOTE Application software rests on and extends the capab
46、ilities of the operating system to meet customer needs. 3.2.5 Traffic Data data which specifies how the application program will perform in the particular circumstances of one traffic system NOTE This may be considered to be in two parts. 3.2.5.1 Traffic Safety Data BS EN 50556:2011- 9 - EN 50556:20
47、11 all Traffic Data stored in non-volatile memory that has a direct impact on the safety of road users 3.2.5.2 Traffic Non Safety Data all the remainder of the data which will not cause an unacceptable danger to the road user if the data is changed 3.2.6 Design Authority Design Responsible individua
48、l or group (organisation) responsible for the safe design and manufacturing, including the instructions for safe use, installation and maintenance of the equipment or system 3.3 Electrotechnical 3.3.1 live part see IEC 60050-826 3.3.2 enclosure (EN 50102) part providing protection of equipment again
49、st certain external influences and, in any direction, protection against contact NOTE This definition from the existing International Electrotechnical Vocabulary (IEC 60050-826) needs the following explanations under the scope of this standard: a) Enclosures provide protection of equipment against harmful effects of mechanical impacts and protection of persons and livestock against access to hazardous parts. b) Barriers, shapes of openings or any other means - whether attached to the enclosure or formed by the
