1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4641-301:2011Aerospace series Cables, optical 125 m diameter claddingPart 301: Tight structure 50/125 m GI fibre nominal 1,8 mm outside diameter Product standardBS EN 4641-
2、301:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 4641-301:2011. The UK participation in its preparation was entrusted to T e c h n i c a l Committee ACE/6, Aerospace avionic electrical and fibre optic technology.A list of organizations represented on thi
3、s 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. BSI 2011 ISBN 978 0 580 66653 7 ICS 49.060 Compliance with a British Standard cannot confer immunity fro
4、m legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2011.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 4641-301:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4641-301 May 2011 ICS 49.06
5、0 English Version Aerospace series - Cables, optical 125 m diameter cladding - Part 301: Tight structure 50/125 m GI fibre nominal 1,8 mm outside diameter - Product standard Srie Arospatiale - Cbles, optiques, diamtre extrieur de la gaine optique 125 m - Partie 301: Cble structure serre, fibre gradi
6、ent dindice 50/125 m, diamtre extrieur 1,8 mm - Norme de produit Luft- und Raumfahrt - Lichtwellenleiterkabel, Claddingdurchmesser 125 m - Teil 301: Festaderaufbau GI 50/125 m, Faser Kabelauendurchmesser 1,8 mm - Produktnorm This European Standard was approved by CEN on 12 February 2011. CEN members
7、 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
8、to the CEN-CENELEC Management Centre or to any CEN 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 CEN member into its own language and notified to the CEN-CENELEC Management
9、 Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
10、 Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any
11、form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4641-301:2011: EBS EN 4641-301:2011EN 4641-301:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms, definitions, symbols and abbreviations . 44 Required characteristics . 45 Cable construction 56 M
12、aterials . 67 Test methods and performances . 68 Tooling 129 Quality assurance 1210 Designation and marking 1211 Delivery conditions 1312 Storage 1313 Technical specification . 13BS EN 4641-301:2011EN 4641-301:2011 (E) 3 Foreword This document (EN 4641-301:2011) has been prepared by the Aerospace an
13、d Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its
14、 presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2011, and conflicting national standards shall be withdrawn at the latest by November 2011. Attention is drawn to the
15、 possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countr
16、ies are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sloven
17、ia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 4641-301:2011EN 4641-301:2011 (E) 4 1 Scope This product standard specifies the general characteristics, conditions for qualification, acceptance and quality assurance for a fibre optic cable with a 50/125 m Graded Index fibre core, 1,8 mm
18、 outside diameter for non pull-proof contact designs. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (includi
19、ng any amendments) applies. EN 2424, Aerospace series Marking of aerospace products EN 3475-601, Aerospace series Cables, electrical, aircraft use Test methods Part 601: Smoke density EN 3745 (all parts), Aerospace series Fibres and cables, optical, aircraft use Test methods EN 3909, Aerospace serie
20、s Test fluids and test methods for electric components and sub-assemblies EN 4641-001, Aerospace series Cables, optical, 125 m diameter cladding Part 001: Technical specification TR 4667, Aerospace series Termination procedure for EN 4639 optical contact 1)3 Terms, definitions, symbols and abbreviat
21、ions For the purposes of this document, the terms, definitions, symbols and abbreviations detailed in EN 3745-100 apply. 4 Required characteristics The characteristics of the cables, tested according to the methods described hereafter shall comply with the values defined in this product standard. 1)
22、 Published as ASD-STAN Technical Report at the date of publication of this standard by Aerospace and Defence Industries Association of Europe-Standardization (ASD-STAN), (www.asd-stan.org). BS EN 4641-301:2011EN 4641-301:2011 (E) 5 5 Cable construction See Figure 1 and Table 1. Key 1 Core 2 Cladding
23、 3 Primary buffer 4 Secondary buffer 5 Strength member 6 Outer jacket Figure 1 Table 1 Property Value Core diameter (50 3,0) m Cladding diameter (125 2,0) m Core/cladding concentricity 3 m Core non circularity 5 % Cladding non circularity 2 % Primary buffer (245 15) m Attenuation at 850 nm (20 C) 20
24、0 N 3 2 4 5 6 1 BS EN 4641-301:2011EN 4641-301:2011 (E) 6 6 Materials See Table 2. Table 2 Element Material Fibre Core Silica Cladding Primary buffer High Temperature Polyacrylate Secondary buffer High Temperature Polymer(s) Mechanical strength reinforcement Aramid/Aramid-Fibreglass Woven Braid Jack
25、et(s) High Temperature Polymer 7 Test methods and performances 7.1 Tests in accordance with EN 3745-100 7.1.1 Optical fibre See Table 3. Table 3 Optical fibre performance requirements Test method EN 3745- Designation of test Test conditions and results 201 Fibre visual examination Pass 202 Fibre cor
26、e dimension Method A: core diameter = (50 3) m 501 Optical fibre proof test 1 % 202 Fibre cladding dimension Cladding diameter: (125 2) m Method A or B Sample should be in accordance with test methods Number of sample: 1 203 Primary coating outside diameter Not applicable 202 Fibre dimension core no
27、n circularity Core non circularity : 5 % (3 m) Number of sample: 1 202 Fibre dimension cladding non circularity Cladding non circularity : 2 % (2,5 m) Number of sample: 1 continued BS EN 4641-301:2011EN 4641-301:2011 (E) 7 Table 3 Optical fibre performance requirements (concluded) Test method EN 374
28、5- Designation of test Test conditions and results 202 Fibre dimension concentricity error Concentricity error 3 m Number of sample: 1 301 Method A Fibre attenuation Maximum attenuation: 5 dB/km at 850 nm, 3 dB/km at 1 300 nm at 20 oC Minimum sample length: 100 m 302 Numerical aperture Numerical ape
29、rture: 0,2 0,015 at = (850 20) nm Sample length: 2 m 303 Bandwidth Bandwidth 500 MHz/km at 850 nm 500 MHz/km at 1 300 nm Number of sample: 1 Minimum sample length: 1 km Central wavelengths: (850 10) nm (1 300 10) nm Spectral width ( 3 dB): 10 nm for 850 nm 7.1.2 Fibre optic cable See Table 4. Table
30、4 Fibre optic cable performance requirements Test method EN 3745- Designation of test Test conditions and results 201 Visual Inspection The outer jacket shall have the correct identification as specified in this standard. The jacket shall be continuous and free of visible defects such as lumps, abra
31、sions, cracks, splits or blisters. Number of sample: 1 Sample length: 3 m. 203 Buffer diameter (925 75) m 203 Outer jacket outside diameter (1,80 0,1) mm 205 Method A Longitudinal stability Visual examination in accordance with EN 3745-201 Shrinkage or elongation 2 m Number of samples: 2 407 Flammab
32、ility No flaming particles shall fall from the sample during the test and the tissue paper shall not be ignited Period of flame application: 30 seconds Maximum burn length: 75 mm Self extinguish after 5 sec Number of samples: 5 Sample length: (1 0,05) m 410 Thermal life Test Sample: 100 m Maximum pe
33、rmissible variation in attenuation: 200 N Number of samples: 1 continued BS EN 4641-301:2011EN 4641-301:2011 (E) 10 Table 4 Fibre optic cable performance requirements (continued) Test method EN 3745- Designation of test Test conditions and results 506 Impact Residual variation in attenuation: 0,3 dB
34、 at 850 nm Energy to be applied: 3 J Radius intermediate piece :15 mm Mass of hammer: 800 g Height: 400 mm Number of impacts: 5 Sample length 700 mm Number of samples: 5 Distance between impacts : 0 mm 507 Cut-through Visual Examination in accordance with EN 3745-201 Monitor attenuation to determine
35、 fibre breakage of the sample during testing at 20 C and 150 C Load to be applied: 20 N Duration of load application :1 min Number of samples: 3 Sample length: (2 0,01) m Rate of load application: (50 10) N/min 508 Torsion Variation of attenuation: 0,25 dB Number of samples: 1 Sample length: (2 0,01
36、) m Load to be applied: 150 N Number of cycles: 1 000 Distance between the rotating grip and the fixed grip: (0,25 0,01) m 509 Kink Permissible variation of attenuation: 3 dB Minimum loop diameter: 10 mm Number of samples: 3 Sample length 10 times bend radius 510 method A Bend Visual examination in
37、accordance with EN 3745-201 variation of attenuation: 0,2 dB Residual attenuation after removing the specimen from the test equipment: 0,1 dB Load to ensure contact between the cable and the mandrel: 20 N Mandrel diameter: 25 mm Number of turns: 10 Number of sample: 1 Sample length: (10 0,01) m 511
38、Cable to cable abrasion Visual examination in accordance with EN 3745-201 No exposure of first material under outer jacket Category A: 1 optical, 1 copper (16 AWG DR) Minimum number of cycles: 2 800 000 Load: 10 N Category B: 2 optical cables Minimum number of cycles: 500 000 Load = 10 N Number of s
39、amples: 3 Sample length: 300 mm 512 Flexure endurance Visual examination in accordance with EN 3745-201 Permissible variation in attenuation: 0,25 dB at 850 nm Load: 5 N Mandrel diameter: 30 mm Number of cycles: 3 000 Sample length: 5 m Number of samples: 3 continued BS EN 4641-301:2011EN 4641-301:2
40、011 (E) 11 Table 4 Fibre optic cable performance requirements (concluded) Test method EN 3745- Designation of test Test conditions and results 513 Crush resistance Variation of attenuation: 1dB Load: 500 N during 10 s Mandrel diameter: 10 mm Number of samples: 5 Sample length: 5 m 514 Bend twist Not
41、 applicable 515 Buffer insertion force Not applicable 516 Severe bend Not applicable 517 Cable tie clamping Maximum transmittance change: 0,05 dB Mandrel diameter: (13 1) mm Number of cable ties applied: 6 Cable tension setting: #1 Number of samples: 3 Sample length: 4 m 601 Smoke density Test metho
42、d: EN 3475-601 Specific optical smoke density (average) Dm 200 within 4 minutes test duration under both the flaming and non-flaming conditions. Value must be measured at the end of the test. Number of samples: 8 Sample length: 3,1 m 602 Toxicity Not applicable 603 Nuclear radiation Not applicable 7
43、01 Cable stripping Visual examination in accordance with EN 3745-201 Strip force 20 N Sample length: 50 mm 703 Durability of manufacturers identity markings Examine marking in accordance with EN 3745-201 visual inspection Number of samples: 1 Length of strokes: 10 mm Stroke rate: (55 5) cycles/min N
44、umber of strokes: 125 Needle size: 0,5 mm Weight on needle: 150 g 705 Contrast measurement 50 % BS EN 4641-301:2011EN 4641-301:2011 (E) 12 7.2 Fluids test See Table 5. Table 5 List of fluids Fluids family Type Fluid number see EN 3909 Test temperature 2 C Duration 24 h Fuel Kerosene 2 70Gasoline 1 4
45、0 Oil Mineral 7 70Synthetic 9 Hydraulic Fluid Mineral 5 80 Phosphate Ester 3 70 De-icer Runway 14 25Aircraft 15 25 Solvent IPA 10 25MEK 12 25 White Spirit 11 25 Cleaner Aqueous Alkali 13 25Sullage Formaldehyde 16 25 Fire Extinguishant Hepta-fluoropropane 17 25 8 Tooling See TR 4667 for termination p
46、rocess. 9 Quality assurance See EN 4641-001. 10 Designation and marking 10.1 General principle of designation EXAMPLE Description blockCABLE FIBRE OPTICIdentity blockEN4641-301Number of the basic standard Product standard BS EN 4641-301:2011EN 4641-301:2011 (E) 13 10.2 Marking The marking shall comp
47、rise of the cable reference, the manufacturer code and the last two digits of the year of manufacture shall conform to EN 2424. The marking may be done wholly or partially in code by agreement with the user. The outer jacket of the cable shall accept marking with UV laser. Hot stamping is forbidden.
48、 10.3 Colours The colour of the outer jacket will be light purple. 11 Delivery conditions 11.1 Packaging See EN 4641-001. 11.2 Labelling See EN 4641-001. 11.3 Delivery lengths See EN 4641-001. The minimum delivery length of a fibre or cable is by agreement between customer and supplier. 12 Storage F
49、ibre optic cables shall be stored as described hereunder: Humidity: 90 % Temperatures: 60 C to 85 C CAUTION Let cable warm up prior to handling if fibre optic cable has been stored for prolonged periods of time below 0 C. 13 Technical specification See EN 4641-001. This page deliberately left blankThis page
