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1、DRAFT FOR DEVELOPMENT DD ENV 50235:1997 Aeronautical ground lighting electrical installation Signs: Equipment specifications and tests ICS 93.120 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 07:12:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD ENV 50235:199
2、7 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 05-1999 ISBN 0 580 27796 8 National foreword This publication is not to be regarded as
3、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 and experie
4、nce 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 initiated 2 yea
5、rs 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 period, the
6、 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 Chiswick Hig
7、h 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 international public
8、ations 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 using the “Fin
9、d” 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 10 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This
10、 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 07:12:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD ENV 50235:1997 BSI 05-1999i Conte
11、nts Page National foreword Inside front cover Foreword 2 Text of ENV 50235 3 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 07:12:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, T
12、ue Dec 12 07:12:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN PRESTANDARD PRNORME EUROPENNE EUROPISCHE VORNORM ENV 50235 February 1997 ICS 93.120 Descriptors: Electrical installation, lighting, aerodrome, sign, classification, designation, marking, performance, dependability. construction,
13、test English version Aeronautical ground lighting electrical installation Signs: 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 initially to
14、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 and to make the
15、 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 electrotechnical comm
16、ittees 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 Electrotechnique Eu
17、ropisches 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 50235:1997 E Licensed Copy: London South Bank University, London South Ban
18、k University, Tue Dec 12 07:12:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 50235:1997 BSI 05-1999 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 vote and was appr
19、oved as ENV 50235 on 1996-07-02. The following date was fixed: Contents Page Foreword2 1Scope, object and fundamental principles3 2Normative references3 3Definitions3 3.1ICAO3 3.2Taxiway (T 11)3 3.3Movement area (M 41)3 3.4Manoeuvring area (M 4)3 3.5Apron (A 119)3 3.6Taxiing guidance signs3 3.7Manda
20、tory instruction sign3 3.8Information sign4 3.9Luminaire4 3.10 Frangibility (F 36)4 3.11 Rated current4 3.12 Optical component4 3.13 Routine test4 3.14 MTBF Mean time between failures4 3.15 MRT Mean repair time4 3.16 Repair time4 3.17 Useful life4 4Classification and designation4 4.1Classification a
21、ccording to service conditions4 4.2Classification according to operational use4 4.3Classification according to electrical supply5 4.4Markings5 5General requirements5 5.1Components of signs5 Page 5.2Service conditions5 6Performance requirements6 6.1Photometric requirements6 6.2Electromagnetic compati
22、bility6 6.3Dependability6 6.4Integrity6 7Design and construction6 7.1General requirements6 7.2Mechanical strength7 7.3Protection against electric shock7 7.4Protection against ingress of dust, solid objects and moisture7 7.5Insulation resistance and electric strength7 7.6External and internal wiring7
23、 7.7Provision for earthing7 7.8Sign faces7 7.9Drain holes8 7.10 Fastenings and covers8 7.11 External finish8 7.12 Replaceable components8 7.13 Optical components and lampholders8 7.14 Ballasts (or lamp control gear)8 7.15 Electric converters8 8Tests8 8.1Type tests8 8.2Routine tests10 Figure 1 Means
24、of calculating average luminance of a sign background10 Table 1 Sign dimensions5 Table 2 Test sequence9 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, London South Bank University, Tue Dec 12 07:12:48 G
25、MT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 50235:1997 BSI 05-19993 1 Scope, object and fundamental principles This standard covers signs installed in the movement area to provide pilots and vehicle operators with information. The Standard is applicable to signs with built-in illumination arrangem
26、ents using tungsten filament, tubular flourescent and other discharge lamps on supply voltages not exceeding 1 000 V. The standard shall not apply to non-illuminated signs or signs illuminated by external light sources. The object is to provide design and construction specifications for the signs th
27、at are considered necessary to meet the operational standards adopted by ICAO and to cover all aspects of safety (electrical, thermal and mechanical). The signs may be energised from parallel power supply or by connection to a constant current series circuit used for taxiway or runway lighting syste
28、ms. 2 Normative references This prestandard incorporates by dated or undated reference, 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 revision
29、s of any of these publications apply to this prestandard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. prEN 356, Glass in building. Security glazing. Testing and classification of resistance against manual att
30、ack. EN 50081-2, Electromagnetic compatibility Generic emission standard Part 2: Industrial environment. EN 50082-2, Electromagnetic compatibility Generic immunity standard Part 2: Industrial environment. ENV 50232, Aviation ground lighting electrical installation Isolating transformer: Equipment sp
31、ecifications and tests. IEC 50(191), International Electrotechnical Vocabulary Chapter 191: Dependability and quality of service. EN 60598-1, Luminaires Part 1: General requirements and tests. EN 60920, Ballasts for tubular flourescent lamps General and safety requirements. EN 60924, DC supplied ele
32、ctronic ballasts for tubular flourescent lamps General and safety requirements. EN 60928, AC supplied electronic ballasts for tubular flourescent lamps General and safety requirements. ICAO, International standards and recommended practices Aerodromes Annex 14 to the Convention on International Civi
33、l Aviation, Volume 1 and 2, Aerodrome Design and Operations (Issued by International Civil Aviation Organisation). 3 Definitions For the purpose of this prestandard the following definitions apply, as well as those given in EN 60598-1. For definitions taken from Annex 14 to the Convention on Interna
34、tional Civil Aviation, Volume 1, Aerodrome Design and Operations, ICAO reference numbers have been added (refers to ICAO Doc 9569). 3.1 ICAO International Civil Aviation Organisation 3.2 taxiway (T11) a defined path on a land aerodrome established for the taxiing of aircraft and intended to provide
35、a link between one part of the aerodrome and another 3.3 movement area (M 41) that part of an aerodrome to be used for take-off, landing and taxiing of aircraft, consisting of the manoeuvring area and the apron(s) 3.4 manoeuvring area (M 4) the movement area, excluding aprons 3.5 apron (A 119) a def
36、ined area, on a land aerodrome, intended to accommodate aircraft for the purposes of loading or unloading passengers, mail or cargo, fuelling, parking or maintenance 3.6 taxiing guidance signs guidance signs installed on an aerodrome to provide pilots and vehicle drivers with information. The signs
37、are classified as Mandatory Instruction Signs and Information Signs 3.7 mandatory instruction sign a mandatory instruction sign is provided when it is intended to identify, by a sign, a location beyond which an aircraft or vehicle shall not proceed unless authorised by air traffic control Licensed C
38、opy: London South Bank University, London South Bank University, Tue Dec 12 07:12:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 50235:1997 4 BSI 05-1999 3.8 information sign an information sign is provided when it is intended to indicate, by a sign, a specific location, or routing information 3.
39、9 luminaire apparatus which distributes, filters or transforms the light transmitted from one or more lamps and which includes all the parts necessary for supporting, fixing and protecting the lamps, but not the lamps themselves, and where necessary circuit auxiliaries together with the means for co
40、nnecting them to the supply NOTEThis definition is given in EN 60598-1 but is repeated here for the purpose of clarity and since taxiing guidance signs may in several aspects be regarded as luminaires. 3.10 frangibility (F 36) an object of low mass designed to break, distort or yield on impact so as
41、 to present the minimum hazard to aircraft 3.11 rated current the supply current assigned to the sign by the manufacturer 3.12 optical component any item used for controlling the light from a light source by means of reflection, refraction, absorption or transmission 3.13 routine test a test to whic
42、h each individual sign is subjected 3.14 MTBF Mean Time Between Failures the expectation of operating time between failures 3.15 MRT Mean repair Time the expectation of the repair time 3.16 repair time that part of the active corrective maintenance time during which repair actions are performed on a
43、n item 3.17 useful life under given conditions, the time interval beginning at a given instant of time, and ending at when the failure rate becomes unacceptable or when the item is considered unrepairable as a result of a fault 4 Classification and designation Signs are classified according to servi
44、ce conditions, operational use, and methods for electrical supply. 4.1 Classification according to service conditions The signs shall be designed for continuous outdoor use under specified service conditions. Type 1 signs are designed for operation down to 20 C. Type 2 signs are designed for operati
45、on down to 55 C. 4.1.1 Signs designed for normal service conditions 4.1.2 Signs with provisions for unusual service conditions 4.2 Classification according to operational use Classification according to operational use is based on standards and recommended practices published in Annex 14 to the Conv
46、ention on International Civil Aviation. 4.2.1 Mandatory instruction signs Mandatory instruction signs shall have the following characteristics: Mandatory instruction signs shall have a face with a red background and white lettering. The legend height shall be either 400 mm or 300 mm depending on the
47、 operational use. 4.2.2 Information signs Information signs shall have the following characteristics: a) Location signs shall have a black face with a surrounding yellow border and with yellow lettering. The minimum legend height shall be either 200 mm or 300 mm depending of the operational use. b)
48、Other information signs shall have a yellow face with a black lettering. The minimum legend height shall be 200 mm, 300 mm or 400 mm depending on the operational use. A minimum legend height of 400 mm is required for runway exit signs. 4.2.3 Sign dimensions The dimensions of signs shall be in accord
49、ance with Table 1. Sign lengths shall be sufficient to include the complete message including a boarder of background colour of at least half legend height. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 07:12:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 50235:1997 BSI 05-19995 Table 1 Sign dimensions 4.3 Classification according to electrical supply 4.3.1 Signs energised from a parallel circuit Signs designed for direct supply from a low voltage switchgear. 4.3.2 Signs energised by