EN 50556:2018

Road traffic signal systems

This document specifies requirements for Road Traffic Signal Systems, including their development, design, testing, installation and maintenance. In particular, it forms the electrotechnical part 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 will be used with this standard either singly or together to define an operational equipment or system. This will 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 document will be used with any other respective standard(s) for the other associated systems to ensure that overall safety is not compromised. This document is applicable to traffic signal control equipment permanently and temporarily installed, and portable traffic control equipment, with the exception of portable traffic signal equipment only capable of controlling alternate / shuttle working lanes (as further defined in 3.2.10).

Straßenverkehrs-Signalanlagen

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 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. This 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 ensure 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.

Systèmes de signaux de circulation routière

Sistemi prometne signalizacije

Vsak od zgornjih standardov se bo uporabljal s tem standardom posamezno ali skupaj pri opredeljevanju
operativne opreme ali sistema. To se bo zagotovilo z uporabo elektrotehničnih metod in preskušanja, opredeljenih v tem standardu.
Kjer se bodo sistemi prometne signalizacije uporabljali z drugimi sistemi, npr. javno razsvetljavo ali železniško
signalizacijo in komunikacijo, se bo ta dokument uporabljal skupaj z drugimi zadevnimi standardi za druge povezane sisteme, da se zagotovi celotna varnost.
Ta dokument se uporablja za trajno in začasno nameščeno opremo za nadzor prometa ter prenosno opremo za nadzor prometa, razen za prenosno opremo za prometno signalizacijo, ki lahko nadzoruje samo izmenične/zožane delovne pasove (kot je dodatno opredeljeno v 3.2.10).

General Information

• Status: Published
• Publication Date: 27-Sep-2018
• Withdrawal Date: 27-Sep-2021
• ICS: 93.080.30 - Road equipment and installations
• Technical Committee: CLC/BTTF 69-3 - Road traffic
• Drafting Committee: CLC/BTTF 69-3 - Road traffic
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 28-Sep-2018
• Due Date: 12-May-2017
• Completion Date: 28-Sep-2018
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN 50556:2019 - Road traffic signal systems

Relations

• Replaces: EN 50556:2011 - Road traffic signal systems
• Effective Date: 26-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2019
Nadomešča:
SIST EN 50556:2011
Sistemi prometne signalizacije
Road traffic signal systems
Straßenverkehrs-Signalanlagen
Systèmes de signaux de circulation routière
Ta slovenski standard je istoveten z: EN 50556:2018
ICS:
93.080.30 Cestna oprema in pomožne Road equipment and
naprave installations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50556
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2018
ICS 93.080.30 Supersedes EN 50556:2011
English Version
Road traffic signal systems
Systèmes de signaux de circulation routière Straßenverkehrs-Signalanlagen
This European Standard was approved by CENELEC on 2017-12-18. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50556:2018 E
Contents Page
European foreword . 6
Introduction . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Electrical supply and limits . 17
4.1 Nominal voltages . 17
4.2 Operating voltage range . 17
4.3 Low voltage . 18
4.3.1 Auxiliary state switch response voltage (V ) . 18
aux
4.3.2 Power up activation voltage . 18
4.4 Overvoltage . 18
4.5 Voltage dip . 18
4.6 Mains frequency . 19
5 Safety . 19
5.1 Electrical safety . 19
5.1.1 General . 19
5.1.2 Controller Signal outputs . 20
5.1.3 Interconnections . 21
5.1.4 Cables . 21
5.1.5 Insulation . 22
5.2 Traffic safety . 23
5.2.1 General . 23
5.2.2 Requirements of signal intensity for safety . 23
5.2.3 Requirements for signal states . 23
5.2.4 Failure consideration (Failure mode analysis) . 25
5.2.5 Location of monitoring elements for signals . 28
6 Testing . 28
6.1 Object . 28
6.2 Organization of testing . 28
6.2.1 Ordering of tests . 28
6.2.2 Presentation of equipment . 29
6.3 Environmental tests. 30
6.3.1 General conditions for the tests . 30
6.3.2 Random vibration test (in accordance with EN 60068-2-64) . 31
6.3.3 Impact tests . 31
6.3.4 Degree of protection (in accordance with EN 60529) . 31
6.3.5 Dry heat (in accordance with EN 60068-2-2) . 32
6.3.6 Cold (in accordance with EN 60068-2-1) . 32
6.3.7 Damp heat (in accordance with EN 60068-2-30) . 32
6.3.8 Solar radiation (in accordance with EN 60068-2-5) . 32
6.4 Electrical tests . 33
6.4.1 Scope of electrical compatibility tests . 33
6.4.2 Output to signal heads . 33
6.4.3 External input tests . 33
6.4.4 External output tests . 33
6.4.5 Communications interface circuits . 34
6.5 Electrical safety tests . 34
6.5.1 General . 34
6.5.2 Typical test conditions . 34
6.5.3 Protective conductors continuity test . 34
6.5.4 Labelling . 34
6.5.5 Access to hazardous voltages . 35
6.5.6 Protection against fire risks . 35
6.5.7 Test of residual current protection means for the installation . 35
6.5.8 Test of residual current protection means for maintenance supplies . 35
6.5.9 Electrical strength test . 35
6.6 Traffic safety tests . 35
6.6.1 Safety tests (EN 12675) . 35
6.6.2 Undervoltage tests . 36
6.6.3 Power up activation voltage test . 36
6.6.4 Overvoltage test . 36
6.6.5 Power supply voltage dips . 36
6.7 Electromagnetic compatibility testing . 36
7 Electrical interfaces . 37
7.1 General . 37
7.2 Detector interface . 37
8 Installation . 37
8.1 General . 37
8.2 Tests carried out during installation . 38
8.3 Test of cables following the installation of cables . 38
8.4 Inspection of terminations following the installation and termination of all equipment and
cables . 38
8.5 Test of impedance . 39
8.5.1 Protective conductors continuity . 39
8.5.2 Earth impedance test . 39
8.5.3 Fault loop impedance test . 39
8.6 Insulation of live parts to earth . 39
8.7 RCD (residual current device / earth leakage breaker) . 40
8.8 Fuses . 40
8.9 Voltage and polarity of supply . 40
8.10 Connections between controllers, signals and ancillary equipment . 40
8.11 Safety covers .
...