09-30197925-DC.pdf

a Date: 19 January 2009 Origin: European Latest date for receipt of comments: 16 April 2009 Project no.: 2009/00701 Responsible committee: ACE/6 Aerospace avionic electrical and fibre optic technology Interested committees: Title: Draft BS EN 4641-301 Aerospace series - Cables, optical 125m diameter cladding Part 301: Product Standard - 50-125 µm GI fibre nominal 1.8 mm Outside Diameter Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 16 April 2009. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. 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Direct tel: 020 8996 7009 Responsible Committee Secretary: Committee Service Centre (BSI) E-mail: cscbsigroup.com Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 DPC: 09/30197925 DC Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:26, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on European discussions in which the UK has taken an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent British Standard. Comment is particularly welcome on national, legislative or similar deviations that may be necessary. Even if this draft standard is not approved by the UK, if it receives the necessary support in Europe, the UK will be obliged to publish the official English Language text unchanged as a British Standard and to withdraw any conflicting standard. 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Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:26, Uncontrolled Copy, (c) BSI - 1 - Date: 2008-11 ENGLISH VERSION Aerospace series Cables, optical 125m diameter cladding Part 301: Tight structure 50-125 µm GI fibre nominal 1.8 mm Outside Diameter Product Standard Série aérospatiale Câble optique, diamètre extérieur de la gaine optique 125m Part 301 : Structure serrée, Fibre à gradient dindice 50/125 m Diamètre extérieur 1,8 mm Norme produit Luft- und Raumfahrt Lichtwellenleiterkabel, Claddingdurchmesser 125m Teil 301: Festaderaufbau GI 50/125m Faser Kabelaußendurchmesser 1,8 mm Produktnorm Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:26, Uncontrolled Copy, (c) BSI - 2 - Contents 1 Scope .3 2 Normative references.3 3 Definitions, symbols and abbreviations 3 4 Required characteristics.3 5 Material and description4 6 Test methods and performances5 6.1 Tests in accordance with EN 37455 6.1.1 Optical fibre (see Table 3).5 6.1.2 Fibre optic cable (see Table 4) 5 6.2 Fluids Test.9 7 Tooling: see TR4647 for Termination Processes10 8 Quality assurance (see EN 9133).10 9 Designation and marking.10 9.1 General principle of designation10 9.1.1 Cable fibre optic10 9.2 Marking .10 9.3 Colours.10 10 Delivery conditions10 10.1 Packaging (see 4641-001) .10 10.2 Labelling (see 4641-001).10 10.3 Delivery lengths (see 4641-001)10 11 Storage.10 Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:26, Uncontrolled Copy, (c) BSI - 3 - 1 Scope This product standard specifies the general characteristics, conditions for qualification, acceptance and quality assurance for a fibre optic cable with a 50/125µm Graded Index fibre core, 1.8mm outside diameter for non pull-proof contact design. 2 Normative references This European Product Standard 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 revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 9133 Aerospace series Quality management systems, qualification procedure for aerospace standard parts EN 3745 Aerospace series - Fibres and cables, optical, aircraft use Test Methods EN 3475 Aerospace series - Cables, electrical, aircraft use - Test methods. EN 3838 Aerospace series - Requirements and tests on user-applied markings on aircraft electrical cables EN 2812 Aerospace series - Stripping of electrical cables EN 3909 Aerospace series - Test fluids for electric components and sub-assemblies EN 60794 Optical fibre cables, general specifications EN 60793 Optical fibres, measurement methods and test procedures TR 6058 Cable code identification list NSA 935 000 Cables-electrical repertory identification 3 Definitions, symbols and abbreviations For the purposes of this standard, the 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. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:26, Uncontrolled Copy, (c) BSI 5 Material and description PRIMARY BUFFER CORE CLADDING SECONDARY BUFFER STRENGTH MEMBER OUTER JACKET Figure 1: Example of Fibre Optic Cable Construction (The secondary buffer and outer jacket may be made up from multiple layers) Property Value Core diameter 50 ± 3,0 µm Cladding diameter 125 ± 2.0 µm Core/cladding concentricity 3 µm Core non circularity 5 % Cladding non circularity 2 % Primary Buffer 245 ± 15 µm Attenuation at 850 nm (+ 20°C) 200 N Table 1: Fibre Optic Cable Physical Dimensions Element Material Core Fibre Cladding Silica Primary Buffer High Temperature Polyacrylate Secondary Buffer High Temperature Polymer(s) Mechanical strength reinforcement Aramid/Aramid-Fibreglass Woven Braid Jacket(s) Fluoropolymer Table 2: Fibre optic cable materials - 4 - Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:26, Uncontrolled Copy, (c) BSI - 5 - 6 Test methods and performances 6.1 Tests in accordance with EN 3745 6.1.1 Optical fibre (see Table 3) Table 3: Optical fibre performance requirements Title Test method EN 3745 Test conditions and results Fibre visual examination 201 Pass Fibre core dimensions 202 Method A: core diameter = 50 µm ± 3 µm Fibre attenuation 301 method A Max attenuation 5 dB/km 850 nm 3 dB/km 1300 nm at 20oC Minimum sample length: 100 m Numerical aperture 302 Numerical aperture: 0.2 ± 0.015 at = 850 nm ± 20 nm Sample length: 2 m Bandwidth 303 Bandwidth 500 MHz/km at 850 nm TBC at 1300 nm Number of samples: 1 Minimum sample length: 1 km Central wavelengths: 850 nm ± 10 nm Spectral width (- 3 dB): 10 nm for 850 nm Fibre proof test 501 1% 6.1.2 Fibre optic cable (see Table 4) Table 4: Fibre optic cable performance requirements Title Test method EN 3745 Test conditions and results Visual Inspection 201 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, abrasions, cracks, splits or blisters Number of samples: 1 Sample length: 3 m Fibre dimensions 202 Not applicable Primary coating outside diameter 203 Not applicable Buffer diameter 203 925 µm ± 75 µm Outer jacket outside diameter 203 1.80 mm ± 0.1 mm Longitudinal stability 205 method A TBC (see Appendix A) Visual examination in accordance with EN 3745-201 Shrinkage or elongation 10 m Number of samples: 2 Flammability 407 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 m ± 0.05 m Thermal life 410 Test Sample: 100m Maximum permissible variation in attenuation: 1% Scrape abrasion 503 Visual examination in accordance with EN 3745-201 variation in attenuation: 1 dB 850 nm Load: 10 N Number of cycles : 100 Number of samples: 2 Sample length: 0.75 ± 0.01 m Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:26, Uncontrolled Copy, (c) BSI - 7 - Title Test method EN 3745 Test conditions and results Micro-bending 504 Visual examination in accordance with EN 3745-201 ariation in attenuation: 1 dB 850 nm Maximum residual attenuation 15 minutes after removing the load: 200 N Pulling speed: 50 ± 10 mm/min Number of samples: 1 Sample length 35 cm Impact 506 variation in attenuation: 0.3 dB 850 and 1300 nm Load to be applied: 3 J Radius intermediate piece :15mm Number of impacts: 5 Sample length 700mm Number of samples: 5 Cut-through 507 applicable TBC Torsion 508 variation of attenuation: 0.25 dB Number of samples: 1 Sample length: 2 m ± 0.01 m Load to be applied: 150 N Number of cycles: 1000 Distance between the rotating grip and the fixed grip: 0.25 ± 0.01 m Kink 509 permissible variation of attenuation: 3 dB Minimum loop diameter: 10 mm Number of samples: 3 Sample length 10 times bend radius Bend 510 method A Visual examination in 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 samples: 1 Sample length: 10 m ± 0,01 m Cable to cable abrasion 511 Visual examination in accordance with EN 3745-201 No exposure of first material under outer jacket Cat A: 1 optical, 1 copper (16 AWG DR) Minimum number of cycles: 2,800,000 Load: 10N Cat B: 2 optical cables Minimum number of cycles: 500,000 Load = 10N Number of samples: 3 Sample length: 300 mm Flexure endurance 512 Visual examination in accordance with EN 3745-201 permissible variation in attenuation: 0.25 dB 850 nm Load: 5.0 N Mandrel diameter: 30 mm Number of cycles: 3 000 Sample length: 5 m Number of samples: 3 Cable Crush load 513 variation of attenuation: 1dB Load: 500N during 10s Mandrel diameter: 10 mm Number of samples: 5 Sample length: 5 m Bend twist 514 Not applicable Buffer insertion force 515 Not applicable Severe bend 516 Not applicable Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:26, Uncontrolled Copy, (c) BSI - 8 - Title Test method EN 3745 Test conditions and results Cable tie clamping 517 applicable TBC Smoke density 601 Test method: 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 Toxicity 602 Test method: EN 3475-602 Number of samples: 4 Sample length: 3,1 m Nuclear radiation 603 Not applicable Cable stripping 701 Visual examination in accordance with EN 3745-201 Strip force 20N Sample length: 50mm Durability of manufacturers identity markings 703 Examine marking in accordance with EN 3745-201 visual examination Number of samples: 1 Length of strokes: 10 mm Stroke rate: 55 ±5 cycles/min Number of strokes: 125 Needle size: 0.5 mm Weight on needle: 150g Contrast measurement 705 50% Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:26, Uncontrolled Copy, (c) BSI - 9 - 6.2 Fluids Test Table 5: List of fluidsa Fluids to be used for the test Fluids Family Type Base Alternative Temperature (°C) +/-2°C Reference Fuels Kerosene ISO 1817 liquid F - 70 F18 F34 F37 F76 F40 Phosphate base ISO1817 liquid 103 - 70 Synthetic fluid H 580 NSA 307110 type IV Silicone base NATO-S-1714 - 80 NATO-S-1714 Hydraulic fluid