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1、DRAFT FOR DEVELOPMENT DD ENV 50234:1997 Aeronautical ground lighting electrical installation Flashing lights: Equipment specifications and tests ICS 93.120 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 07:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD ENV
2、 50234:1997 This Draft for Development, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1997 BSI 04-1999 ISBN 0 580 27797 6 National foreword This publication is not to be re
3、garded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature because it is an interim draft. A revised version of this document is being produced by IEC/TC 97. It should be applied on this provisional basis, so that information a
4、nd experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion into a European Standard. A review of this publication will be initi
5、ated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its three-year life. The commencement of the review period will be notified by an announcement in Update Standards. According to the replies received by the end of the review p
6、eriod, the responsible BSI Committee will decide whether to support the conversion into a European Standard, to extend the life of the prestandard or to withdraw it. Comments should be sent in writing to the Secretary of BSI Technical Committee EPL/97, Lighting and beaconing of aerodromes, at 389 Ch
7、iswick High Road, London W4 4AL, giving the document reference and clause number and proposing, where possible, an appropriate revision of the text. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to internatio
8、nal publications with their corresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by usin
9、g the “Find” facility of the BSI Standards Electronic Catalogue. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ENV title page, pages 2 to 12 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorpor
10、ated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 07:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD ENV 50234:1997 BSI 04-1
11、999i Contents Page National foreword Inside front cover Foreword 2 Text of ENV 502343 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 07:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank Univ
12、ersity, Tue Dec 12 07:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN PRESTANDARD PRNORME EUROPENNE EUROPISCHE VORNORM ENV 50234 February 1997 ICS 93.120 Descriptors: Electrical installation, lighting, aerodrome, flashing light, characteristics, classification, test, compatibility, maintai
13、nability English version Aeronautical ground lighting electrical installation Flashing lights: Equipment specifications and tests This European Prestandard (ENV) was approved by CENELEC on 1996-07-02 as a prospective standard for provisional application. The period of validity of this ENV is limited
14、 initially to three years. After two years the members of CENELEC will be requested to submit their comments, particularly on the question whether the ENV can be converted into a European Standard (EN). CENELEC members are required to announce the existence of this ENV in the same way as for an EN a
15、nd to make the ENV available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) until the final decision about the possible conversion of the ENV into an EN is reached. CENELEC members are the national electro
16、technical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Elect
17、rotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. ENV 50234:1997 E Licensed Copy: London South Bank University, Lo
18、ndon South Bank University, Tue Dec 12 07:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 50234:1997 BSI 04-1999 2 Foreword This European Prestandard was prepared by the CENELEC BTTF 72-3, Lighting fittings for aerodromes. The text of the draft was submitted to the CENELEC questionnaire and vot
19、e and was approved as ENV 50234 on 1996-07-02. The following date was fixed: Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 3.1Flashing light system3 3.2Flashing light3 4Assessment of general characteristics3 4.1General test requirements3 4.2Components of the system4 4.3Fundame
20、ntal principles4 4.4Purpose, supplies and structure4 4.5Classification of external influences5 4.6Compatibility6 4.7Maintainability6 4.8Safety services6 4.9Environmental protection6 5Protection for safety7 5.1Protection against electric shock7 5.2Protection against thermal effects7 5.3Protection aga
21、inst overcurrent7 5.4Protection against over and under voltage7 5.5Isolation and switching7 5.6Electro-magnetic compatibility7 6Selection and erection of equipment8 6.1Common rules8 6.2Wiring system8 6.3Switchgear and control gear8 6.4Earthing arrangements and protective conductor9 6.5Safety devices
22、9 7Inspection and testing9 7.1Operation and reliability tests9 7.2Equipment tests10 Annex A (informative) Proposal of flashing light measurement11 Table 19 latest date by which the existence of the ENV has to be announced at national level(doa) 1996-12-01 Licensed Copy: London South Bank University,
23、 London South Bank University, Tue Dec 12 07:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 50234:1997 BSI 04-19993 1 Scope This prestandard specifies general requirements for classification of flashing light systems used on airports or for ground based aviation lighting systems, for the lumin
24、aries, for the control cabinets and for their mechanical and electrical construction erection, together with the related tests. This prestandard is applicable to flashing light systems used for: Sequential flashing approach lighting systems; Runway threshold identification lights; Runway lead-in lig
25、hting systems; Medium and high intensity obstruction lighting systems. Alternately flashing lights used as runway guard lights are excluded from this prestandard. Attention is drawn to the fact that this prestandard covers all aspects of safety (electrical, thermal and mechanical). The purpose of th
26、is prestandard is to provide a set of requirements and tests which are applicable to the luminaries and their control equipment. In general, this prestandard covers safety requirements for all components of the system. 2 Normative references This prestandard incorporates by dated or undated referenc
27、e, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this prestandard only when incorporated in it
28、 by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 50081-2, Electromagnetic compatibility Generic emission standard Part 2: Industrial environment. EN 50082-2, Electromagnetic compatibility Generic immunity standard Part 2: Industrial envi
29、ronment. EN 55015, Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment. EN 60204, Safety of machinery Electrical equipment of machines. EN 60529, Degrees of protection provided by enclosures (Code IP) (IEC 529). EN 60598-1, Luminaires P
30、art 1: General requirements and tests. EN 60742, Isolating transformers and safety isolating transformers Requirements. EN 60950, Safety of information technology equipment, including electrical business equipment. EN 60984, Sleeves of insulating material for live working. EN 61000-3-2, Electromagne
31、tic compatibility (EMC) Part 3: Limits Section 2: Limits for harmonic current emissions (equipment input current up to and including 16 A per phase). EN 61000-3-3, Section 3: Limitation of voltage fluctuations and flicker in low-voltage supply systems for equipment with rated current up to 16 A. EN
32、61547, Equipment for general lighting purposes EMC immunity requirements. HD 384, Electrical installations of buildings. ICAO, International standards and recommended practices Aerodromes Annex 14 to the Convention on International Civil Aviation, Volume 1 and 2, Aerodrome Design and Operations (Iss
33、ued by International Civil Aviation Organisation). 3 Definitions For the purposes of this prestandard the following definitions apply, as well as those given in ICAO Annex 14 and HD 384, EN 60598-1 and EN 60950. Where the terms voltage and current are used, they imply true RMS values unless otherwis
34、e stated. 3.1 flashing light system system including one or several flashing lights together with their electrical wiring used as an aid either during en route phase and during the approach to an airport 3.2 flashing light luminaire including its control cabinet and part of a flashing light system 4
35、 Assessment of general characteristics 4.1 General test requirements 4.1.1 Tests according to this prestandard are type tests 4.1.2 Unless otherwise stated, luminaries and their associated control equipment shall be tested at ambient temperature (between 10 C and 30 C). Each flashing light submitted
36、 to the test shall be tested “as delivered” and as installed in normal use, including one lamp. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 07:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 50234:1997 4 BSI 04-1999 Each sample shall satisfy all the rel
37、evant tests. In order to reduce the time of testing and to allow for any test which may be destructive, the manufacturer may submit additional components provided that these are of the same material and design as the one used in the original equipment and that the results of tests are the same as if
38、 carried out on an identical piece of equipment. Where the test for compliance is shown as being “by inspection” this shall include any necessary handling. 4.2 Components of the system Components complying with the requirements of the relevant Europeen standards for those components and not requitin
39、g additional protection shall not be subjected to further testing or appraisal as part of the equipment. Those components which rely upon the construction of the equipment for electrical and mechanical safety shall be tested in accordance with the relevant clause of this prestandard. 4.3 Fundamental
40、 principles Flashing light systems are used on airports. One or several lights are installed to form one system. All lights of one system are emitting short duration light flashes of equal light intensity to guide an approaching pilot to the runway or to mark a hazard to air traffic. Every light of
41、a system flashes at given intervals eventually at a given time in a sequence. The control cabinets are powered by a single or three phases mains network, generally 230/400 V AC, 50 or 60 Hz or by series circuits in 6,6 A. They are remotely controlled and have the ability to operate, in many cases at
42、 three levels of energy. They do also provide back indication signals to a remote monitoring system. They provide some form of energy storage in order to keep the variation of power supply current below 150 % of the average value. 4.4 Purpose, supplies and structure 4.4.1 Purpose Flashing light syst
43、ems are used for: sequential flashing approach lighting systems; threshold identification; lead-in lighting systems; medium and high intensity obstruction lighting systems. 4.4.1.1 Sequential flashing approach lighting systems Such systems consist of a row of lights installed along the extended runw
44、ay centre line at regular intervals of 30 m, at the location of the steady burning approach light barrettes. The steady burning lights shall not obstruct the visibility of the flashing lights, and vice versa. Each light consists of one luminaire including a discharge lamp and its triggering or start
45、ing device, connected via a special cabling to a control cabinet. These individual control cabinets are connected together and to a central or master control device serving as interface between the system and the mains and control/monitoring lines. A control system shall ensure the correct firing se
46、quence (timing) of every light and the brightness or energy level control. A monitoring system shall give information on the status of the system, brightness level and correct or faulty operation of one or several light units. 4.4.1.2 Threshold identification A threshold identification lighting syst
47、em shall consist of two lights installed in line with the threshold and symmetrically about the runway centre line at approximately 10 m outside each line of runway edge lights. These two lights shall be flashing in synchronism at a frequency of one or two flashes per second. For operational reasons
48、 an interlock between the two control cabinets shall ensure that both units are operating. Should one of the fittings fail, the other one shall stop flashing to avoid a misleading information to the pilot. In some cases, the threshold identification lighting system is installed at the end of an appr
49、oach lighting system equipped with sequential flashing lights. In such case, the operation of the threshold identification lights shall be synchronized with the approach flashing lights to form a complete system. 4.4.1.3 Lead-in lighting systems Lead-in lighting systems are used to indicate the pilot of an approaching aircraft the route to follow to reach the approach to the runway. This system is only used when a curved route is mandatory to avoid obstacles located on the extended runway centre line. The lights used are the same as t