1、DRAFT FOR DEVELOPMENTDD CLC/TS 50509:2007Use of LED signal heads in road traffic signal systemsICS 93.080.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g
2、47g36g58DD CLC/TS 50509:2007This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 28 September 2007 BSI 2007ISBN 978 0 580 58461 9National forewordThis Draft for Development is the UK implementation of CLC/TS 50509:2007.This publication is not
3、 to be regarded as a British Standard.It is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis, so that information and experience of its practical application can be obtained.Comments arising from the use o
4、f this Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion to a European standard. A review of this publication will be initiated not later than 3 years after its publication by the European organization so that a deci
5、sion can be taken on its status. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards.According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion
6、into a European Standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent to the Secretary of the responsible BSI Technical Committee at British Standards House, 389 Chiswick High Road, London W4 4AL.The UK participation in its preparation was entrusted t
7、o 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 necessary provisions of a contract. Users are responsible for its correct application.Ame
8、ndments issued since publicationAmd. No. Date CommentsTECHNICAL SPECIFICATION CLC/TS 50509 SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION August 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnis
9、che Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. CLC/TS 50509:2007 E ICS 93.080.30 English version Use of LED signal heads in road traffic signal systems This
10、 Technical Specification was approved by CENELEC on 2007-06-01. CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in f
11、orce. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania
12、, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword This Technical Specification was prepared by Working Group 1 Use of LED signal heads in road traffic signal systems of CENELEC BTTF 69-3 Road traffic signal system. The text of the draft was submitted to vote in accord
13、ance with the Internal Regulations, Part 2, Subclause 11.3.3.3 and was approved by CENELEC as CLC/TS 50509 on 2007-06-01. The following date was fixed: latest date by which the existence of the CLC/TS has to be announced at national level (doa) 2007-12-01 This document contains specifications for th
14、e use of LED signal heads in road traffic signal systems in the form of information with regard to the interpretation of existing standards and additional specifications, dealing with specific technical properties of LED signal heads, not previously described in the existing standards. _ CLC/TS 5050
15、9:2007 2 Contents 1 Scope . 5 2 Normative references 5 3 Definitions and abbreviations. 5 3.1 General definitions 5 3.2 Optical definitions 6 3.3 Electrical definitions and abbreviations 6 4 Specification 9 4.1 Existing standards . 9 4.2 Additional technical specifications . 9 4.3 Other issues 14 5
16、Testing . 14 5.1 General . 14 5.2 Testing of the yellow optical unit 14 6 Marking, labelling and product information 14 Annex A (informative) Additional requirements under operating conditions - United Kingdom 15 Annex B (informative) Dimmed operation - the Netherlands . 17 Annex C (informative) Dim
17、med operation - Spain 18 Figure 1 - Luminous intensity and operating voltage 10 Figure A.1 - Operation over voltage range. 15 Figure A.2 - Light output over voltage range 15 Figure C.1 - Operation over voltage range. 18 Figure C.2 - Power consumption over voltage range . 18 Table 1 - Operating condi
18、tions (steady state) 11 Table 2 - Switching-on (illumination) procedure . 12 Table 3 - Switching-off (extinction) procedure 12 Table 4 - Fault response procedure. 13 Table 5 - Yellow optical unit test intervals 14 Table A.1 - Additional electrical requirements 16 CLC/TS 50509:2007 3 Introduction Thi
19、s document gives a specification for the mutual behaviour of traffic signal controllers and light-emitting diode (LED) based signal heads in road traffic signal systems. The specification was written to contribute to safe and reliable operation, while at the same time allowing the compatible operati
20、on of various types and brands of signals and controllers. Whilst the performance requirements for LED signals heads, as specified in the standards, remain unchanged, various properties of composite LED signals that were implicit for incandescent lamps now need to be described. The market for LED si
21、gnals has developed rapidly; products show considerable national or even regional technical differences. This document intends to give guidance to the market for future development and harmonisation. It is the aim of this document to establish a minimum set of requirements that would allow both cont
22、rollers and signal heads to be tested separately. Where a controller or signal has been verified as compatible with a class specified in this document, it would be deemed to function safely and securely in cooperation with a signal or controller verified as compatible with the same class. CLC/TS 505
23、09:2007 4 1 Scope This Technical Specification considers only newly manufactured and installed signal controllers and signal heads for road traffic applications, using appropriate cabling. This Technical Specification considers only LED optical units with 200 mm and 300 mm roundels as standardised i
24、n EN 12368. It does not consider configurations such as an arrow or a pedestrian symbol, created by specifically positioned patterns of LEDs. This Technical Specification does not consider railway signalling applications. 2 Normative references The following referenced documents are indispensable fo
25、r the application 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, Traffic Signal Controllers Functional safety
26、requirements EN 50293, Electromagnetic compatibility Road traffic signal systems Product standard EN 55015, Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment (CISPR 15) EN 60825 series, Safety of laser products (IEC 60825 series) EN 6
27、0950 series, Information technology equipment Safety (IEC 60950 series) EN 61000-2-2, Electromagnetic compatibility (EMC) Part 2-2: Environment Compatibility levels for low-frequency conducted disturbances and signalling in public low-voltage power supply systems (IEC 61000-2-2) EN 61000-3-2, Electr
28、omagnetic compatibility (EMC) Part 3-2: Limits for harmonic current emissions (equipment input current up to and including 16 A per phase) (IEC 61000-3-2) EN 61508 series, Functional safety of electrical/electronic/programmable electronic safety-related systems (IEC 61508 series) HD 638 S1, Road Tra
29、ffic Signal Systems 3 Definitions and abbreviations 3.1 General definitions 3.1.1 road traffic signal system see HD 638 S1 3.1.2 traffic signal controller see EN 12675 CLC/TS 50509:2007 5 3.1.3 signal head see EN 12368 3.1.4 optical unit see EN 12368 3.1.5 LED signal head signal head, containing one
30、 or more optical units with light-emitting diodes as light source 3.2 Optical definitions 3.2.1 luminous intensity see EN 12368 3.2.2 luminance uniformity see EN 12368 3.2.3 dimmed operation operating mode of the road traffic signal system in which the luminous intensity of the signal heads is reduc
31、ed, generally during the hours of darkness 3.3 Electrical definitions and abbreviations 3.3.1 Operating Conditions (Steady State) definitions and abbreviations 3.3.1.1 operating voltage UINvoltage value at the input terminals of the optical unit, whereby the luminous intensity corresponds to the Cla
32、ss indicated in accordance with EN 12368. The voltage is a root-mean-square (r.m.s) value3.3.1.2 relationship between luminous intensity and operating voltage permissible change of the luminous intensity of the optical unit over the operating voltage range UON UIN,max3.3.1.3 operating current IINeff
33、ective (r.m.s) values of the operating current over the operating voltage range UON UIN,maxwith the signal switched on and in the steady state 3.3.1.4 operating current window of measurement period of time in each half-wave of the operating voltage in which the traffic signal controller can carry ou
34、t the current measurement for reliable signal monitoring 3.3.1.5 operating current trace inside the window of measurement allowed deviation for the current profile compared to that that would be taken by a purely resistive load, within the operating current window of measurement (see 3.3.1.4) CLC/TS
35、 50509:2007 6 3.3.1.6 operating current trace outside the window of measurement allowed deviation for the current profile compared to that that would be taken by a purely resistive load, outside the operating current window of measurement (see 3.3.1.4) 3.3.1.7 power consumption at nominal value of t
36、he operating voltage PIN,nompower consumption of the optical unit at the voltage value UIN,nom3.3.1.8 power factor see EN 61000-3-2 3.3.2 switching-on (illumination) related definitions and abbreviations NOTE Differences may exist in specifications depending on the meaning of a signal to road users.
37、 For the purpose of this Technical Specification: - “stop” indicates any signal and/or colour blocking traffic (generally: red); - “go” indicates any signal and/or colour, permissive to traffic (generally: green and yellow). 3.3.2.1 switch-on interval current TSET,currentinterval following the appli
38、cation of the operating voltage until the input current is above the minimum operating current IIN,min3.3.2.2 switch-on interval light TON,lightinterval following the application of the operating voltage until the optical unit reaches the luminous intensity in accordance with EN 12368, 6.3 3.3.2.3 s
39、witch-on voltage UONoperating voltage at which the optical unit reaches a luminous intensity of 10 cd (signal considered “on”). The voltage is a root-mean-square (r.m.s) value 3.3.2.4 transient switch-on overcurrent interval TON,currentinterval following the application of the operating voltage unti
40、l the current is within specified limits of the operating current 3.3.2.5 switch-on overcurrent ION/ IIN,maxmaximum permissible value (surge) over the operating current IIN,maxduring the interval TON,current3.3.3 Switching-off (extinction) related definitions and abbreviations 3.3.3.1 switch-off int
41、erval - light TOFF,lightinterval following the removal of the operating voltage until the optical unit reaches a luminous intensity less than 0,05 cd in the reference axis (signal considered “off”) 3.3.3.2 switch-off voltage UOFF operating voltage below which the luminous intensity is less than 0,05
42、 cd in the reference axis (signal considered “off”) CLC/TS 50509:2007 7 3.3.3.3 quiescent current off IOFFinput current for input voltages below the switch-on voltage UON3.3.3.4 feedback voltage ratio UREV/ UIN,nomresidual voltage ratio measured over the optical unit, a specified interval after the
43、removal of the operating voltage, starting from the nominal value 3.3.3.5 optical unit resistance ROFFimpedance of the unit measured on its terminals when no power is applied NOTE Roffis one method of ensuring that any induced voltage pickup on long signal cable runs is eliminated / dissipate before
44、 it reaches any level that may cause controller conflict voltage monitoring where used to activate. However this may be an optional feature that can be dropped to reduce overall power consumption if an alternative method is available within the control equipment. 3.3.4 Fault response forced switch-o
45、ff 3.3.4.1 residual current - FSO IFSOremaining residual current after a completed forced switch-off, for the entire operating voltage range 3.3.4.2 reaction interval - FSO TOFF,FSOinterval from the triggering of the Forced switch-off procedure to the moment the input current reaches the permissible
46、 value for the residual current IFSO3.3.4.3 switch-off current ratio IOFF,FSO / IIN,maxcurrent during the interval TOFF,FSOin relation to the maximum operating current IIN,max3.3.4.4 load current during force off ITRIGGERmaximum current drawn during activation of an operation termination circuit (“e
47、nd of life fuse”) in the optical unit 3.3.4.5 interval to signal “off” luminous intensity threshold TFAILinterval from the moment the luminous intensity drops below 80 % of the nominal value during operating conditions (steady state), to the moment the luminous intensity becomes less than 0,05 cd in
48、 the reference axis (signal considered “off”) NOTE The luminous intensity of an optical unit may be measured directly, but may also be determined indirectly by measuring current and/or other electrical properties. The appropriate current values may be declared by the manufacturer of the optical unit
49、. 3.3.4.6 optical unit resistance ROFFsee 3.3.3.5 CLC/TS 50509:2007 8 4 Specification 4.1 Existing standards LED signal heads have to conform to EN 12368, HD 638 S1, EN 12675 and EN 50293 without restriction or limitation. When LV (Low Voltage) power supply is present, signal heads also have to comply with EN 60950. Note that, within the scope of this Technical Specification, EN 12368 prescribes the luminous intensity values lOFFand lON. The values for lIN,minand lIN,maxare only tested for the voltage value UIN,nom. An informat
