1、BRITISH STANDARD BS EN 50406-2:2004 End user multi-pair cables used in high bit rate telecommunication networks Part 2: Duct and buried cables The European Standard EN 50406-2:2004 has the status of a British Standard ICS 33.120.10 BS EN 50406-2:2004 This British Standard was published under the aut
2、hority of the Standards Policy and Strategy Committee on 16 August 2004 BSI 16 August 2004 ISBN 0 580 44281 0 National foreword This British Standard is the official English language version of EN 50406-2:2004. The UK participation in its preparation was entrusted to Technical Committee EPL/46, Cabl
3、es, 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
4、European 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 inclu
5、de 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 enquir
6、ies 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 co
7、ver. 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 50406-2 NORME EUROPENNE EUROPISCHE NORM June 2004 CENELEC European Committee for Electrotechnical Standardization Comit
8、 Europen 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 50406-2:2004 E ICS 33.120.
9、10 English version End user multi-pair cables used in high bit rate telecommunication networks Part 2: Duct and buried cables Cbles multi-paires de lutilisateur final utiliss dans les rseaux de tlcommunication hauts-dbits Partie 2: Cbles pour conduites et enterrs Vielpaarige Kabel fr Endanwender fr
10、Telekommunikationsnetzwerke mit hoher Bitrate Teil 2: Kabel fr das Verlegen in Kabelschchten und in Erdreich 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 Euro
11、pean 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 Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (Eng
12、lish, French, German). A version in any other 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,
13、 Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 50406-2:2004 2 Foreword This Euro
14、pean Standard was prepared by the Technical Committee CENELEC TC 46X, Communication cables. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50406-2 on 2004-02-01. The following dates were fixed: - latest date by which the EN has to be implemen
15、ted at national level by publication of an identical 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 50406-2:2004 Contents 1 Scope 5 2 Normative references 5 3 Terminology and abbr
16、eviations .5 3.1 Terminology 5 3.2 Abbreviations 5 4 General information.6 4.1 General cable description .6 4.2 Environment and product safety requirement.6 4.3 Testing 6 5 Requirements for conductor6 5.1 Construction and dimensions6 5.2 Mechanical requirements6 5.3 Electrical requirements .7 5.3.1
17、Conductor resistance.7 5.3.2 Conductor resistance unbalance .7 6 Requirements for insulation.7 6.1 Construction material and dimensions7 6.1.1 Construction.7 6.1.2 Colour code .7 6.2 Mechanical requirements7 6.3 Electrical requirements .7 6.3.1 Insulation resistance7 6.3.2 Dielectric strength 7 7 Re
18、quirements for cable element .8 7.1 Construction and dimensions8 7.1.1 Screening of the cable element.8 7.1.2 Spare cable elements8 8 Requirements for cable core .8 8.1 Design .8 8.1.1 General 8 8.1.2 Screen8 8.1.3 Interstitial fillers 8 9 Requirements for filling compounds9 10 Requirements for the
19、screening of the cable core 9 11 Requirement for the armour 9 12 Requirements for the sheath.9 12.1 Colour of sheath9 12.2 Mechanical requirements9 13 Cable identification 10 EN 50406-2:2004 4 14 Requirements for finished cable10 14.1 Mechanical requirements10 14.1.1 Bending .10 14.1.2 Impact .10 14
20、.1.3 Tensile (under consideration) 10 14.1.4 Crush resistance10 14.2 Environmental requirements .10 14.2.1 Temperature range 10 14.2.2 Cold bend 11 14.2.3 Fauna and mould proofing.11 14.2.4 Moisture barriers11 15 Electrical requirements11 15.1 Dielectric strength .11 15.2 Mutual capacitance .11 15.3
21、 Capacitance unbalance 11 15.4 Velocity of propagation .11 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 (ELFEXT) 12 15.9 Power Sum (PS) of crosstalk losses.12 15.10 Mean impedance.12 15.11 Return loss 12 15.12 Coup
22、ling attenuation 13 15.13 Transfer impedance .13 15.14 Transmission properties13 16 Product qualification requirements13 5 EN 50406-2:2004 1 Scope This European Standard defines outdoor multi-pair/quad cables for use in high bit rate telecommunication networks with their relative definitions and req
23、uirements. It covers radially water blocked cables, with an overall screen, with performances up to 60 MHz, to be used in outdoor networks intended to connect the broadband outside plant to the individual customer premises with a maximum recommended length of connection of 1 km. The electrical, envi
24、ronmental, mechanical and transmission performance characteristics of the cables, related to their reference test methods, are detailed. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited appl
25、ies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50289 series Communication cables - Specifications for test methods (Basic reference standards) EN 50290 series Communication cables (Basic reference standards) EN 60811-1-1 1993 Insulat
26、ing 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 mechanical properties (IEC 60811-1-1) EN 60811-1-2 1995 Insulating and sheathing materials of electric cables - C
27、ommon test methods Part 1-2: General application - Thermal ageing methods (IEC 60811-1-2:1985 + corrigendum May 1986 + A1:1989) HD 402 S2 1984 Standard colours for insulation for low-frequency cables and wires (IEC 60304:1982) IEC 60028 1925 International standard of resistance for copper 3 Terminol
28、ogy 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 Transfer Mode DSL Digital Subscriber Line EMC Electromagnetic Compatibility EMI Electromagnetic Interfer
29、ence FSAN Full Service Access Network HDSL High-bit-rate Digital Subscriber Lines EN 50406-2:2004 6 ISDN Integrated Digital Services Network ISDN-BRA ISDN-Basic Rate Access ISDN-PRA ISDN-Primary Rate Access Mbps Mega-bits per second TBD To be determined VDSL Very-high-bit-rate Digital Subscriber Lin
30、es 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 high bit rate telecommunication networks. They are water- blocked cables with an overall screen. High bit rate applications targeted in t
31、his specification involve frequencies up to 60 MHz. To restrict emission and to ensure satisfactory electromagnetic immunity, these cables include an overall screen. These cables contain from one pair up to 200 pairs (ffs) that can be either in pairs or quads. 4.2 Environment and product safety requ
32、irement Safety local and regional regulation (e.g. relevant European directives) is assumed to be met by these cables. 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 ot
33、herwise 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 du
34、e to a lack 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
35、 in accordance 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 con
36、ductor shall 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 10 % for 0,4 mm wires and better than 15 % for wires with diameters superior to 0,4 mm. 7 EN 50406-2:2004 5.3 Electrical requirements
37、 5.3.1 Conductor resistance While measured in accordance with EN 50289-1-2, the conductor 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 b
38、e maximum 2 %. 6 Requirements for insulation 6.1 Construction material and dimensions 6.1.1 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 thic
39、kness of the insulation shall be measured in accordance with the method specified in EN 60811-1-1, 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, Subc
40、lause 8.1. It shall be possible to strip the insulation from the conductor easily and without 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 C
41、olour code The colour code shall be agreed between the customer and the manufacturer. 6.2 Mechanical 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
42、50289-1-4, the insulation resistance shall be at least 5 000 Mohm.km under 500 V d.c. 6.3.2 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 50406-2:2004 8 7 Requirements for cable element 7.1 Cons
43、truction and dimensions The cable element is - a pair consisting of two insulated conductors 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
44、choice of the twist configuration (SZ or helical) and the maximum average length of lay 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 infrequ
45、ent but acceptable occurrence of the maximum lay being longer than that which may be specified. 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 p
46、lastic 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. 7.1.2 Spare cable elements The cable may be equipped with spare pai
47、rs or quads in accordance with the basic cable structure. The number of spare cable elements 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 screene
48、d or unscreened. 8.1.2 Screen Where a screen is required over the unit, 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 plain copper drain wire whereby the metal tape is in contact with the drai
49、n wire. A protective wrapping may be applied under or/and over the screen. 8.1.3 Interstitial fillers In order to provide a compact and reasonably circular cable fillers may be used. 9 EN 50406-2:2004 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. The filling compound shall meet the requirements speci
