1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Optical fibre cables Part 2-41: Indoor cables Product specificationfor simplex and duplex buffered A4 fibresBS EN
2、 60794-2-41:2008NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LANational forewordThis British Standard is the UK implementation of EN 60794-2-41:2008. Itis identical to IEC 60794-2-41:2008.The UK participation in its preparation was entrusted by TechnicalCommittee GEL/86, Fibre
3、optics, to Subcommittee GEL/86/1, Optical fibresand cables.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. BSI 2
4、009ISBN 978 0 580 55794 1ICS 33.180.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDAR
5、DBS EN 60794-2-41:200831 January 2009EUROPEAN STANDARD EN 60794-2-41 NORME EUROPENNE EUROPISCHE NORM September 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: ru
6、e de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60794-2-41:2008 E ICS 33.180.10 English version Optical fibre cables - Part 2-41: Indoor cables - Product specification for simplex and duple
7、x buffered A4 fibres (IEC 60794-2-41:2008) Cbles fibres optiques - Partie 2-41: Cbles intrieurs - Spcification de produit pour cbles simplex et duplex munis de fibres A4 sous revtement protecteur (CEI 60794-2-41:2008) Lichtwellenleiterkabel - Teil 2-41: Innenkabel - Produktspezifikation fr ummantelt
8、e Simplex- und Duplexfasern der Kategorie A4 (IEC 60794-2-41:2008) This European Standard was approved by CENELEC on 2008-08-01. CENELEC 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 sta
9、ndard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any ot
10、her language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Repu
11、blic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60794-2-41:2008EN 60794-2-41:2008 - 2 - F
12、oreword The text of document 86A/1215/FDIS, future edition 1 of IEC 60794-2-41, prepared by SC 86A, Fibres and cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60794-2-41 on 2008-08-01. This standard is to be used in conjunction wit
13、h EN 60794-1-1 and EN 60794-1-2, and EN 60794-2. A blank detail specification is provided in Annex A. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-05-01 latest date by
14、 which the national standards conflicting with the EN have to be withdrawn (dow) 2011-08-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60794-2-41:2008 was approved by CENELEC as a European Standard without any modification. In the official ver
15、sion, for Bibliography, the following notes have to be added for the standards indicated: IEC 60654 NOTE Harmonized in EN 60654 series (not modified). IEC 60654-4 NOTE Harmonized as EN 60654-4:1997 (not modified). IEC 60721 NOTE Harmonized in EN 60721 series (not modified). IEC 60721-1 NOTE Harmoniz
16、ed as EN 60721-1:1995 (not modified). IEC 60721-3-3 NOTE Harmonized as EN 60721-3-3:1995 (not modified). IEC 60793-1-40 NOTE Harmonized as EN 60793-1-40:2003 (modified). IEC 60793-1-41 NOTE Harmonized as EN 60793-1-41:2003 (not modified). IEC 60794-2-40 NOTE Harmonized as EN 60794-2-40:2008 (not mod
17、ified). IEC 61000-6-2 NOTE Harmonized as EN 61000-6-2:2005 (not modified). IEC 61326 NOTE Harmonized in EN 61326 series (not modified). IEC 61918 NOTE Harmonized as EN 61918:2008 (modified). _ BS EN 60794-2-41:2008- 3 - EN 60794-2-41:2008 Annex ZA (normative) Normative references to international pu
18、blications with their corresponding European publications 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 (including any amendments)
19、applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60189-1 - 1)Low-frequency cables and wires with PVC insulation and PVC sheath - Part 1: General test and measuring methods
20、- - IEC 60793-1-20 - 1)Optical fibres - Part 1-20: Measurement methods and test procedures - Fibre geometry EN 60793-1-20 2002 2)IEC 60793-1-21 - 1)Optical fibres - Part 1-21: Measurement methods and test procedures - Coating geometry EN 60793-1-21 2002 2)IEC 60793-1-46 - 1)Optical fibres - Part 1-4
21、6: Measurement methods and test procedures - Monitoring of changes in optical transmittance EN 60793-1-46 2002 2)IEC 60793-1-50 - 1)Optical fibres - Part 1-50: Measurement methods and test procedures - Damp heat (steady state) EN 60793-1-50 2002 2)IEC 60793-1-51 - 1)Optical fibres - Part 1-51: Measu
22、rement methods and test procedures - Dry heat EN 60793-1-51 2002 2)IEC 60793-1-52 - 1)Optical fibres - Part 1-52: Measurement methods and test procedures - Change of temperature EN 60793-1-52 2002 2)IEC 60793-2-40 - 1)Optical fibres - Part 2-40: Product specifications - Sectional specification for c
23、ategory A4 multimode fibresEN 60793-2-40 2006 2)IEC 60794-1-1 - 1)Optical fibre cables - Part 1-1: Generic specification - General EN 60794-1-1 2002 2)IEC 60794-1-2 - 1)Optical fibre cables - Part 1-2: Generic specification - Basic optical cable test procedures EN 60794-1-2 2003 2)IEC 60794-2 2002 O
24、ptical fibre cables - Part 2: Indoor cables - Sectional specification EN 60794-2 2003 1)Undated reference. 2) Valid edition at date of issue. BS EN 60794-2-41:2008 2 60794-2-41 IEC:2008(E) CONTENTS 1 Scope.5 2 Normative references .5 3 Construction.6 3.1 General .6 3.2 Optical fibres.6 3.3 Buffer 6
25、3.4 Strength and anti-buckling members .6 3.5 Ripcord .6 3.6 Sheath 6 3.7 Marking .6 3.8 Identification6 3.9 Examples of constructions.6 4 Dimensions 7 5 Tests 7 5.1 General .7 5.2 Dimensions .7 5.3 Mechanical requirements.7 5.3.1 General .7 5.3.2 Tensile performance8 5.3.3 Crush 8 5.3.4 Impact .8 5
26、.3.5 Bend8 5.3.6 Repeated bending .9 5.3.7 Bend at low temperature9 5.3.8 Flexing 9 5.3.9 Torsion 9 5.3.10 Kink.9 5.4 Environmental requirements9 5.4.1 Mechanical environmental requirement10 5.4.2 Transmission environmental requirements.11 5.5 Transmission requirements .11 5.6 Fire performance.11 An
27、nex A (informative) Blank detail specification.12 Bibliography22 Figure 1 Examples of buffered fibres7 Table 1 Dimensions of buffered fibre7 Table 2 Minimum tensile load for 4 % elongation .8 Table 3 Environmental exposure tests .10 Table 4 Attributes measured 10 Table 5 Requirement for tensile stre
28、ngth10 Table 6 Requirement for change in attenuation 11 Table A.1 Required tests19 BS EN 60794-2-41:200860794-2-41 IEC:2008(E) 5 OPTICAL FIBRE CABLES Part 2-41: Indoor cables Product specification for simplex and duplex buffered A4 fibres 1 Scope This part of IEC 60794 covers simplex and duplex buff
29、ered A4a through A4g fibres for indoor use. These may be cut into short lengths, which can be used in patchcord cable assemblies. The requirements of sectional specification IEC 60794-2 are applicable to cables covered by this standard. 2 Normative references The following referenced documents are i
30、ndispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60189-1, Low-frequency cables and wires with PVC insulation and PVC sheath Part 1: Ge
31、neral test and measuring methods IEC 60793-1-20, Optical fibres Part 1-20: Measurement methods and test procedures Fibre geometry IEC 60793-1-21, Optical fibres Part 1-21: Measurement methods and test procedures Coating geometry IEC 60793-1-46, Optical fibres Part 1-46: Measurement methods and test
32、procedures Monitoring of changes in optical transmittance IEC 60793-1-50, Optical fibres Part 1-50: Measurement methods and test procedures Damp heat (steady state) IEC 60793-1-51, Optical fibres Part 1-51: Measurement methods and test procedures Dry heat IEC 60793-1-52, Optical fibres Part 1-52: Me
33、asurement methods and test procedures Change of temperature IEC 60793-2-40, Optical fibres Part 2-40: Product specifications Sectional specification for category A4 multimode fibres IEC 60794-1-1, Optical fibre cables Part 1-1: Generic specification General IEC 60794-1-2, Optical fibre cables Part 1
34、-2: Generic specification Basic optical cable test procedures IEC 60794-2:2002, Optical fibre cables Part 2: Indoor cables Sectional specification BS EN 60794-2-41:2008 6 60794-2-41 IEC:2008(E) 3 Construction 3.1 General In addition to the constructional requirements in IEC 60794-2, the following co
35、nsiderations apply to simplex and duplex buffered A4a through A4g fibres. The buffered fibre shall be designed and manufactured for an expected operating lifetime of at least 15 years. In this context, the attenuation of the installed cable at the operational wavelength(s) shall not exceed values ag
36、reed between the customer and supplier. The materials in the cable shall not present a health hazard within its intended use. There shall be no fibre splice in a delivery length unless otherwise agreed by the customer and supplier. 3.2 Optical fibres Multimode Category A4a through A4g optical fibres
37、 shall be used that meet the requirements of IEC 60793-2-40. 3.3 Buffer The buffer shall consist of one or more layers of inert material. For tight buffers, the buffer shall be easily removable in one operation over a length of 15 mm to 25 mm, depending on customer requirements. For semi-tight buffe
38、rs, the buffer shall be easily removable over a length of 0,2 m to 2,0 m. 3.4 Strength and anti-buckling members None. 3.5 Ripcord None. 3.6 Sheath None. 3.7 Marking If required, the buffer shall be marked as agreed between the customer and supplier. 3.8 Identification None. 3.9 Examples of construc
39、tions Examples of buffered fibre constructions are shown in Figure 1. BS EN 60794-2-41:200860794-2-41 IEC:2008(E) 7 Simplex DuplexIEC 1025/08 Figure 1 Examples of buffered fibres. 4 Dimensions The fibre dimensions shall comply with IEC 60793-2-40. Buffer dimensions are shown in Table 1. Table 1 Dime
40、nsions of buffered fibre Fibre type Nominal dimensions mm Tolerances Simplex 2,2 0,1 A4a, A4b, A4d, A4e, A4f, A4g Duplex 2,2 x 4,4 Minor axis: 0,1 Major axis: 0,2 Simplex 1,5 0,1 A4c Duplex 1,5 x 3,0 Minor axis: 0,1 Major axis: 0,2 5 Tests 5.1 General Compliance with specification requirements shall
41、 be verified by carrying out tests selected from the following subclauses. It is not intended that all the tests shall be performed. The frequency of testing shall be agreed between the customer and supplier. Unless otherwise specified, all tests shall be carried out at ambient temperature. 5.2 Dime
42、nsions The fibre dimensions and tolerances shall be checked in accordance with test method IEC 60793-1-20 or IEC 60793-1-21. The diameter of the buffer shall be measured in accordance with the methods of IEC 60189-1. 5.3 Mechanical requirements 5.3.1 General Some of the following tests can be perfor
43、med on a short sample length of buffered fibre that is still an integral part of a longer length. Thus it becomes possible to detect permanent changes in attenuation. Launch conditions to measure changes in attenuation shall be in conformity with IEC 60793-2-40. BS EN 60794-2-41:2008 8 60794-2-41 IE
44、C:2008(E) 5.3.2 Tensile performance Method: IEC 60794-1-2-E1B (Equipment is the same, but the procedure is modified so that sufficient load is applied until 4 % elongation is achieved. At that point, the load is immediately released.) Rate of transfer device: Either 100 mm/min or 100 N/min. Length o
45、f sample between clamps: 100 mm to 200 mm. Requirements: For elongation at 4 %, the loads shall exceed the loads shown in Table 2. Change in attenuation shall not exceed 0,2 dB at least 1 min after the load is released. The load shall be released at the instant the 4 % elongation is reached. Table 2
46、 Minimum tensile load for 4 % elongation Fibre type A4a and A4d A4b and A4e A4c A4f, A4g Simplex 56 36 16 8 Tensile load (N) at 4 % elongation (minimum) Duplex 112 72 32 16 NOTE Elongation to breaking point is not applicable to A4 fibres. 5.3.3 Crush Method: IEC 60794-1-2-E3. Force: 7 N/mm for simpl
47、ex, 14 N/mm for duplex. Duration: 3 min. Requirements: Change in attenuation shall not exceed 0,2 dB at least 1 min after the test. Under visual examination there shall be no splitting of the buffer. NOTE In the case of duplex buffered fibres, the force is applied on the flat sides of buffered fibre
48、. 5.3.4 Impact Method: IEC 60794-1-2-E4. Radius of striking surface: 12,5 mm. Impact energy: 0,2 J. Number of impacts: at least 3, each separated by at least 500 mm. Requirements: Change in attenuation shall not exceed 0,2 dB at least 1 min after the test. Under visual examination there shall be no
49、splitting of the buffer. NOTE In the case of duplex buffered fibres, the force is applied on the flat sides of buffered fibre. 5.3.5 Bend Method: IEC 60794-1-2-E11A. Mandrel diameter: 50 mm. 60794-2-41 IEC:2008(E) 9 Number of turns per helix: 6. Number of cycles: 10. Requirements: Change in attenuation shall not exceed 0,2 dB after the test. Under visual examination there shall be no splitting of the buf
