NORME EUROPÉENNE ICS 49.090 English Version Aerospace series - Cables, optical 125 µm diameter cladding - Part 101: Tight structure 62,5 µm core GI fibre 0,9 mm outside diameter - Prod
Trang 1BSI Standards Publication
Aerospace series — Cables, optical 125 µm diameter
cladding
Part 101: Tight structure 62,5 µm core GI fibre 0,9 mm outside diameter — Product standard
Trang 2National foreword
This British Standard is the UK implementation of EN 4641-101:2015 The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology.
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.
© The British Standards Institution 2015.
Published by BSI Standards Limited 2015 ISBN 978 0 580 87670 7
ICS 49.090
Compliance with a British Standard cannot confer immunity from legal obligations.
This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2015.
Amendments/corrigenda issued since publication
Trang 3NORME EUROPÉENNE
ICS 49.090
English Version
Aerospace series - Cables, optical 125 µm diameter cladding -
Part 101: Tight structure 62,5 µm core GI fibre 0,9 mm outside
diameter - Product standard
Série aérospatiale - Câbles, optiques, diamètre extérieur de
la gaine optique 125 µm - Partie 101 : Câbles à structure
serrée, fibre à gradient d'indice coeur 62,5 µm, diamètre
extérieur 0,9 mm - Norme de produit
Luft- und Raumfahrt - Lichtwellenleiterkabel, Mantelaußendurchmesser 125 µm - Teil 101: Vollader, 62,5
µm GI-Faser, Kabelaußendurchmesser 0,9 mm -
Produktnorm
This European Standard was approved by CEN on 29 November 2014
CEN members 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 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 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom
EUROPEAN COMMITTEE FOR STANDARDIZATION
C O M I T É E U R O P É E N D E N O R M A L I S A T I O N
E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
Trang 4Contents
Page
Foreword 3
1 Scope 4
2 Normative references 4
3 Terms and definitions 4
4 Required characteristics 4
5 Materials and description 5
6 Test methods and performances in accordance with EN 3745-100 5
7 Quality assurance 12
8 Designation, marking and colours 12
9 Delivery conditions 13
10 Storage 13
Trang 5Foreword
This document (EN 4641-101:2015) has been prepared by the Aerospace and 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 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 October 2015, and conflicting national standards shall be withdrawn at the latest by October 2015
Attention is drawn to the 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 countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom
Trang 61 Scope
This product standard specifies the general characteristics, conditions for qualification, acceptance and quality assurance for a fibre optic cable with a 62,5/125 µm Graded Index fibre core, 0,9 mm outside diameter and of tight buffer construction, for inside wiring applications
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies
EN 2812, Aerospace series — Stripping of electric cables
EN 3745-100 (all parts), Aerospace series — Fibres and cables, optical, aircraft use — Test methods — Part 100:
General
EN 3838, Aerospace series — Requirements and tests on user-applied markings on aircraft electrical cables
EN 3909, Aerospace series — Test fluids and test methods for electric components and sub-assemblies
EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace
standard parts
TIA/EIA-455-30-B, FOTP-30 — Frequency Domain Measurement of Multimode 1)
TIA/EIA-455-175-B, FOTP175 — Chromatic Dispersion Measurement of Single-mode Optical Fibers by the
Differential Phase Shift Method 1)
ANSI/EIA 4920000-A, Generic Specification for Optical Waveguide Fibers 1)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 3745-100apply
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
See Table 1
Table 1
Cable mass ≤ 1 g/m
Operating temperature −55 °C to 125 °C
Minimum bend radius (20 °C) Installation: 10 mm (~10 × outside diameter)
Long term: 10 mm (~10 × outside diameter) Storage: 20 mm (~20 × cable outside diameter) Tensile strength > 20 N
1) Published by: National (US) American National Standard Institute (www.ansi.org/)
Trang 75 Materials and description
The following table details a breakdown of materials used in the construction of the fibre optic cable The list of materials is not exclusive and any materials used in the construction of the cable must meet the required operating and qualification requirements whilst being compatible with termination processes, methods of retention or epoxy adhesive application used in those processes
See Figure 1 and Table 2
Key
1 Optical fibre
2 Primary coating
3 Outer jacket
Figure 1 Table 2
Element Material
Cladding
6 Test methods and performances in accordance with EN 3745-100
6.1 Optical fibre tests
See Table 3
Trang 8Table 3 — Optical fibre test methods
Test
method
EN 3745- Designation of test Test conditions and results
201 Fibre visual examination The coating shall be continuous and free of visible defects such as
lumps, abrasions, cracks, splits or blisters
202 Fibre core dimensions Core diameter: 62,5 µm ± 3 µm
202 Fibre dimension cladding
diameter Cladding diameter: 25 µm ± 2 µm Method A or B
Sample should be in accordance with test methods Number of sample: 1
202 Fibre dimension core
non circularity Core non circularity: ≤ 5 % (3 µm) Number of sample: 1
202 Fibre dimension cladding
non circularity Cladding non circularity: ≤ 2 % (2,5 µm) Number of sample: 1
202 Fibre dimension concentricity
error Concentricity error: ≤ 3 µm Number of sample: 1
501 Optical fibre proof test > 1 %
301
Method A Fibre attenuation < 4 dB/km at 850 nm at 20 °C < 2 dB/km at 1 300 nm at 20 °C
302 Numerical aperture Numerical aperture: 0,275 ± 0,015 (0,26 to 0,29)
Number of sample : 1 Length of the sample: 2 m Wavelength: 850 nm ± 20 nm
Bandwidth ≥ 500 Mhz.km at 1 300 nm Number of sample: 1
Minimal length of the sample: 1 km Central wavelengths: 850 nm ± 10 nm
1 300 nm ± 10 nm Spectral width (−3 dB): ≤ 10 nm for 850 nm and 1 300 nm
6.2 Fibre optic cable
See Table 4
Trang 9Table 4 — Fibre optic cable test methods (1 of 5)
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 coating shall be continuous and free of visible defects such as lumps, abrasions, cracks, splits or blisters
Sample length: 100 m ± 0,05 m
203 Primary coating outside diameter 400 µm ± 25 µm
203 Outer jacket diameter 900 µm ± 25 µm
205 Longitudinal stability The change in longitudinal dimensions between core/cladding and
primary jacket and core/cladding and outer jacket shall not exceed the maximum value of 200 µm
Number of samples: 4 in total, 2 for each length Length of the samples: 2 m, 20 m ± 0,01 m
301
Method A Attenuation Maximum attenuation at 20 °C α ≤ 4 dB/km at 850 nm, α ≤ 2 dB/km at 1 300 nm
Sample should be in accordance with fibre optic test procedure Central wavelengths: 850 nm and 1 300 nm
Number of sample: 1 Length of the sample: 250 m minimum
301
Method A Cable optical discontinuity Signal discontinuity < 0,2 dB/point Number of sample: 1
305 Cable immunity to ambient light Not applicable
306 Attenuation during temperature
cycling Visual examination in accordance with EN 3745-201 Maximum permitted variation of attenuation:
α ≤ 0,7 dB at 850 nm and 1 300 nm Number of samples: 3
Length of the sample: 20 m ± 0,01 m Temperature cycling (see EN 3745-402) Number of cycles: 5
401 Cable accelerated ageing Visual examination in accordance with EN 3745-201
– Maximum permissible variation in attenuation: < 0,5 dB, – Maximum permissible variation in attenuation after 24 h: < 0,3 dB, – Residual maximum permissible variation in attenuation: < 0,2 dB Number of samples: 3
Length of the sample: 100 m ± 0,05 m Diameter of the mandrel: 250 mm Number of temperature cycles: 1 Test is carried out at the temperature of 125 °C
402 Temperature cycling High temperature: 125 °C
Low temperature: −55 °C Duration at extreme temperatures: 30 min Number of samples: 3
Number of cycles: 5 Rate of change: 5 °C per min
Trang 10Table 4 — Fibre optic cable test methods (2 of 5)
Test
method
EN 3745- Designation of test Test conditions and results
404 Thermal shock Visual examination in accordance with EN 3745-201
Maximum permissible variation in attenuation during test sequence and after 24 h - ∆α < 0,7 dB
The maximum displacement of the fibre value shall be ≤ 200 µm relative
to the outer jacket Number of samples: 3 Length of the sample: 20 m ± 0,01 m Number of temperature cycles: 4 Test is carried out at extreme temperatures
405 Low/High temperature bend Not applicable
No flaming particles shall fall from the sample during the test and the tissue paper shall not be ignited
Period of flame application shall be 30 s
410 Thermal life Maximum permissible variation in attenuation: < 2 dB
Number of samples: 3 Length of the specimen: 100 m ± 0,05 m Lifetime shall be ≥ 100 000 h
411
Method 2 Resistance to fluids Occasional contamination test method Visual examination in accordance with EN 3745-201
Maximum variation of weight: ∆m = 5 %
No cracks – Low colour modification
Fluids as per EN 3909 may cover usual needs, additional fluids may be requested by end user
412 Humidity resistance Visual examination in accordance with EN 3745-201
Maximum residual attenuation: < 0,2 dB Maximum variation of weight: ∆m = 5 % Number of sample: 1
Length of the specimen: 20 m ± 0,01 m Number of cycles: 15
503 Scrape abrasion Maximum permissible variation of attenuation: < 1dB
Visual examination in accordance with EN 3745-201: the optical fibre shall not be visible
Number of samples: 2 Load to be applied: 3 N Length of the sample: 0,75 m ± 0,01 m Number of cycles: 100
Trang 11Table 4 — Fibre optic cable test methods (3 of 5)
Test
method
EN 3745- Designation of test Test conditions and results
504 Micro-bending Maximum permissible variation in attenuation: < 1 dB
Permissible residual attenuation 15 min after removing the load:
< 0,1 dB Visual examination in accordance with EN 3745-201 Number of samples: 3
Load to be applied: 10 N Rate at which the load is applied: 10 N/min Diameter of the mandrel = 3 mm
505 Tensile strength For F = 20 N, maximum permissible variation in attenuation: < 0,5 dB
Rupture load: 20 N Number of specimens: 3
506 Impact Permissible change in attenuation after the test: < 0,5 dB
The test is carried out at the temperature of 20 °C Number of samples: 3
Length of sample: 2 m ± 0,01 m Load to be applied: 1 N
Radius R of the intermediate piece:15 mm
Drop: 0,15 m Number of impact: 5
507 Dynamic cut through Not applicable
– For one cycle : < 0,2 dB, – For 1 000 cycles < 0,5 dB
Length of sample: 2 m ± 0,01 m Number of cycles: 1 000 Load to be applied: 20 N Distance between the rotating grip and the fixed grip: 0,25 m ± 0,01 m
10 X optical cable outside diameter: 10 mm Maximum permissible variation of attenuation: < 3 dB Length of specimen: 2 m ± 0,01 m
Loop minimum diameter value: 20 mm
Residual attenuation after removing the specimen from the test equipment < 0,1 dB
Visual examination in accordance with EN 3745-201 Length of sample: 10 m ± 0,01 m
Load to be applied (M) to ensure contact between the cable and the mandrel:10 N
Diameter of the mandrel D = 10 mm
Number (N) of turns: 10
Trang 12Table 4 — Fibre optic cable test methods (4 of 5)
Test
method
EN 3745- Designation of test Test conditions and results
511 Cable to cable abrasion The outer diameter of electrical cable (DR) is equivalent to AWG 20
The definition of failure is the exposure of the conductor for electrical cable and the exposure of the material under the outer jacket for optical cable in both conditions A and B
Category A: 1 electrical cable + 1 optical cable – Minimum number of cycles = 1 500 000, – Load = 2 N
Category B: 2 optical cables – Minimum number of cycles = 1 000 000, – Load = 2 N
512 Flexure endurance Examination of test specimen for damage in accordance with
EN 3745-201 "visual examination"
Maximum permissible variation of attenuation: < 0,2 dB Number of samples: 3
Length of the sample: 2 m ± 0,01 m Load to be applied: 10 N
Diameter of the mandrel: 10 mm Number of cycles: 500
Number of samples: 3 Length of the sample: > 3 m Load to be applied: 500 N Area of load: 100 mm2
Load duration: 15 mm Maximum variation of attenuation: < 0.1 dB
515 Buffer insertion force Not applicable
601 Smoke density The specific optical smoke density (average) Dm < 200 within 4 min test
duration under both the flaming and non-flaming conditions The value must be measured at the end of the test
701 Cable stripping Visual examination in accordance with EN 3745-201
Applicable to outer jacket Number of samples to be tested: 3 Length of sample: 2 m ± 0,01 m Blade design (see EN 2812) Load defined in relation to the cable construction to be stripped:
F ≤ 1 N/10 mm
Total Length to be stripped: 50 mm
703 Durability of manufacturers identity