1、BRITISH STANDARD BS EN 50407-1:2004 Multi-pair cables used in high bit rate digital access telecommunication networks Part 1: Outdoor cables The European Standard EN 50407-1:2004 has the status of a British Standard ICS 33.120.10 BS EN 50407-1:2004 This British Standard was published under the autho
2、rity of the Standards Policy and Strategy Committee on 16 August 2004 BSI 16 August 2004 ISBN 0 580 44282 9 National foreword This British Standard is the official English language version of EN 50407-1:2004. The UK participation in its preparation was entrusted to Technical Committee EPL/46, Cables
3、, wires, waveguides, R.F. connections, R.F. and microwave passive components and accessories, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or Eu
4、ropean publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include
5、 all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquirie
6、s on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cove
7、r. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50407-1 NORME EUROPENNE EUROPISCHE NORM June 2004 CENELEC European Committee for Electrotechnical Standardization Comit E
8、uropen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50407-1:2004 E ICS 33.120.10
9、 English version Multi-pair cables used in high bit rate digital access telecommunication networks Part 1: Outdoor cables Cbles multi-paires de lutilisateur final utiliss dans les rseaux daccs numriques de tlcommunication haut-dbits Partie 1: Cbles extrieurs Vielpaarige Kabel fr digitale Telekommuni
10、kationsnetzwerke mit hoher Bitrate Teil 1: Auenkabel This European Standard was approved by CENELEC on 2004-02-01. 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 standard without
11、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 other language m
12、ade 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, Cyprus, Czech Republic, Denmark, Estonia, Finl
13、and, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 50407-1:2004 - 2 - Foreword This European Standard was prepared by the Technical Committe
14、e CENELEC TC 46X, Communication cables. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50407-1 on 2004-02-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical
15、 national standard or by endorsement (dop) 2005-02-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-02-01 _ 3 EN 50407-1:2004 Contents 1 Scope .5 2 Normative references5 3 Terminology and abbreviations.5 3.1 Terminology5 3.2 Abbreviations5 4 Ge
16、neral information 6 4.1 General cable description.6 4.2 Environment and product safety requirement. .6 4.3 Testing.6 5 Requirements for conductor.6 5.1 Construction and dimensions6 5.2 Mechanical requirements6 5.3 Electrical requirements.7 5.3.1 Conductor resistance .7 5.3.2 Conductor resistance unb
17、alance7 6 Requirements for insulation .7 6.1 Construction material and dimensions7 6.1.1 Construction7 6.1.2 Colour code 7 6.2 Mechanical requirements7 6.3 Electrical requirements.7 6.3.1 Insulation resistance 7 6.3.2 Dielectric strength7 7 Requirements for cable element.8 7.1 Construction and dimen
18、sions8 7.1.1 Screening of the cable element .8 7.1.2 Spare cable elements.8 8 Requirements for cable core 8 8.1 Design .8 8.1.1 General 8 8.1.2 Screen .8 8.1.3 Interstitial fillers .9 9 Requirements for filling compounds 9 10 Requirements for the screening of the cable core .9 11 Requirement for the
19、 armour.9 12 Requirements for the sheath 9 12.1 Colour of sheath9 12.2 Mechanical requirements of the sheath 9 13 Cable identification .10 EN 50407-1:2004 - 4 - 14 Requirements for finished cable .10 14.1 Mechanical requirements10 14.1.1 Bending 10 14.1.2 Impact 10 14.1.3 Tensile (under consideratio
20、n)10 14.1.4 Crush resistance .10 14.2 Environmental requirements .11 14.2.1 Temperature range 11 14.2.2 Cold bend.11 14.2.3 Fauna and mould proofing 11 14.2.4 Moisture barriers .11 15 Electrical requirements11 15.1 Dielectric strength11 15.2 Mutual capacitance11 15.3 Capacitance unbalance12 15.4 Vel
21、ocity of propagation.12 15.5 Attenuation .12 15.6 Longitudinal Conversion Loss (LCL) 12 15.7 Near End Crosstalk (NEXT)12 15.8 Equal Level Far-End Crosstalk loss (ELFEXT) 12 15.9 Power Sum (PS) of crosstalk losses 12 15.10 Characteristic impedance .13 15.11 Coupling attenuation .13 15.12 Transfer imp
22、edance 13 16 Product qualification requirements13 5 EN 50407-1:2004 1 Scope This European Standard defines outdoor multi-pair cables for use in high bit rate digital telecommunication networks with their relative definitions and requirements. It covers water tight cables, with an overall screen, for
23、 applications up to 10 MHz, to be used in outdoor networks (for example in the subscriber access loop). The electrical, mechanical, transmission performance characteristics of the screened cables, related to their reference test methods, are detailed. 2 Normative references The following referenced
24、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) applies. EN 50289 series Communication cables - Specifications for test methods (Ba
25、sic reference standards) EN 50290 series Communication cables (Basic reference standards) EN 60811-1-1 Insulating and sheathing materials of electric and optical cables Common test methods Part 1-1: General application - Measurement of thickness and overall dimensions - Tests for determining the mec
26、hanical properties (IEC 60811-1-1) EN 60811-1-2 1995 Insulating and sheathing materials of electric cables - Common test methods Part 1-2: General application - Thermal ageing methods (IEC 60811-1-2:1985 + corrigendum May 1986 + A1:1989) HD 402 Standard colours for insulation for low-frequency cable
27、s and wires (IEC 60304) IEC 60028 1925 International standard of resistance for copper 3 Terminology and abbreviations 3.1 Terminology For the purpose of this European Standard, the definitions of EN 50290-1-2 apply. 3.2 Abbreviations ADSL Asymmetric Digital Subscriber Lines ATM Asynchronous Transfe
28、r Mode DSL Digital Subcriber Line EMC Electromagnetic Compatibility EMI Electromagnetic Interference FSAN Full Service Access Network HDSL High-bit-rate Digital Subscriber Lines ISDN Integrated Digital Services Network ISDN-BRA ISDN-Basic Rate Access ISDN-PRA ISDN-Primary Rate Access EN 50407-1:2004
29、 - 6 - Mbps Mega-bits per second TBD To be determined VDSL Very-high-bit-rate Digital Subscriber Lines XDSL Generic term referring to all DSLs, ISDN, HDSL, ADSL, VDSL, etc. 4 General information 4.1 General cable description These cables are designed for outdoor telecommunication networks, therefore
30、 they are water-tight cables. Since these cables are specifically designed for new, various existing and emerging, telecommunication applications that involve high frequency spectrum up to 10 MHz, they include an overall screen to improve the electromagnetic behaviour. These cables contain from one
31、pair up to 600 pairs that can be either in pairs or quads. 4.2 Environment and product safety requirement ffs 4.3 Testing For all test procedures described in this subclause, the test conditions shall be the standard atmospheric conditions (23 5)C and 20 % - 70 % Relative Humidity, unless otherwise
32、stated. All measured and computed values are to be rounded to the number of decimal places given in the corresponding requirement or objective. The parameters specified in this standard may be affected by measurement uncertainty arising either from measurement errors or calibration errors due to a l
33、ack of suitable standards. Acceptance criteria shall be interpreted with respect to this consideration. 5 Requirements for conductor 5.1 Construction and dimensions The conductor shall consist of annealed copper, uniform in quality and free from defects. The properties of the copper shall be in acco
34、rdance with IEC 60028. The conductor shall be solid, circular in section. Normally the conductor should be drawn in one piece. Joints in the conductor are permitted, provided that the tensile strength of a joint is not less than 85 % of the un-jointed solid conductor. The diameter of the conductor s
35、hall be between 0,4 mm to 0,8 mm. 5.2 Mechanical requirements The conductor elongation at break shall be tested according to EN 50289-3-2 and shall be minimum 15 %. 7 EN 50407-1:2004 5.3 Electrical requirements 5.3.1 Conductor resistance While measured in accordance with EN 50289-1-2, the conductor
36、resistance shall meet the computed values when using EN 50290-2-1, Subclause 12.1. 5.3.2 Conductor resistance unbalance While measured in accordance with EN 50289-1-2, the conductor resistance unbalance shall be maximum 2 % 6 Requirements for insulation 6.1 Construction material and dimensions 6.1.1
37、 Construction Conductor insulation shall be composed of solid, cellular or composite (e.g. foam skin) polyolefin. The insulation shall be continuous, having a thickness as uniform as possible. The minimum thickness of the insulation shall be measured in accordance with the method specified in EN 608
38、11-1-1, Subclause 8.2. The insulation shall be applied to fit closely to the conductor. The stripping properties of the insulation shall be checked in accordance with the method specified in EN 60811-1-1, Subclause 8.1. It shall be possible to strip the insulation from the conductor easily and witho
39、ut damage to the insulation or the conductor. When required the insulated conductors shall be coloured for identification. Colours shall correspond reasonably with the standard colours shown in HD 402. 6.1.2 Colour code The colour code shall be agreed between the customer and the manufacturer. 6.2 M
40、echanical requirements Shrinkage of insulation shall be checked against EN 50290-2-23. The shrinkage shall be less than 5 %. 6.3 Electrical requirements 6.3.1 Insulation resistance When tested according to EN 50289-1-4, the insulation resistance shall be at least 5 000 Mohm.km under 500 V d.c. 6.3.2
41、 Dielectric strength Dielectric strength shall be tested according to EN 50289-1-3. The test shall be conducted with 1 kV d.c. or 700 V a.c. for 2 s. EN 50407-1:2004 - 8 - 7 Requirements for cable element 7.1 Construction and dimensions The cable element is - a pair consisting of two insulated condu
42、ctors twisted together and designated wire “a“ and wire “b“, or - a quad consisting of four insulated conductors twisted together and designated wire “a“, wire “c“, wire “b“ and wire “d“ in order of rotation. The choice of the twist configuration (SZ or helical) and the maximum average length of lay
43、 in the finished cable shall be made with respect to the specified electrical requirements, handling performance and the pair or quad integrity. NOTE Forming the element with a variable lay can lead to the infrequent but acceptable occurrence of the maximum lay being longer than that which may be sp
44、ecified. 7.1.1 Screening of the cable element Where a screen is required over the pair or quad, to improve the external and internal immunity, it may consist of the following: a) an aluminium tape laminated to a plastic tape; b) an aluminium tape laminated to a plastic tape and a metal-coated or pla
45、in copper drain wire whereby the metal tape is in contact with the drain wire. A protective wrapping may be applied under or/and over the screen. 7.1.2 Spare cable elements The cable may be equipped with spare pairs or quads in accordance with the basic cable structure. The number of spare cable ele
46、ments is depending upon agreement between the customer and the supplier 8 Requirements for cable core 8.1 Design 8.1.1 General The cable unit may be laid up (SZ or helical) in concentric layers or in units screened or unscreened. 8.1.2 Screen Where a screen is required over the unit, it may consist
47、of the following: a) an aluminium tape laminated to a plastic tape; b) an aluminium tape laminated to a plastic tape and a metal-coated or plain copper drain wire whereby the metal tape is in contact with the drain wire. A protective wrapping may be applied under or/and over the screen. 9 EN 50407-1
48、:2004 8.1.3 Interstitial fillers In order to provide a compact and reasonably circular cable fillers may be used. 9 Requirements for filling compounds When required the interstices of the cable core shall be filled continuously with a compound suitable to prevent water penetration within the cable.
49、The filling compound shall meet the requirements specified in EN 50290-2-28. When continuous filling is not used, water swellable elements, water swellable non- toxic powder or a combination of materials may be used. 10 Requirements for the screening of the cable core The cable core may be screened by a) an aluminium tape laminated to a plastic tape, b) an aluminium tape laminated to a plastic tape and a metal-coated or plain copper drain wire whereby
