BS EN 50117-6-1997 Coaxial cables used in cabled distribution networks - Sectional specification for outdoor drop cables for use in networks operating at frequencies between 5 MHz .pdf

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1、BRITISH STANDARD BS EN 50117-6:1997 Coaxial cables used in cabled distribution networks Part 6: Sectional specification for outdoor drop cables for use in networks operating at frequencies between 5 MHz and 2150 MHz The European Standard EN50117-6:1997 has the status of a British Standard ICS 33.120

2、.10BSEN50117-6:1997 This British Standard, having been prepared under the directionof the ElectrotechnicalSector Board, was published under the authorityof the Standards Boardand comes intoeffecton 15July1997 BSI 09-1999 The following BSI references relate to the work on this standard: Committee ref

3、erence EPL/46/1 Draft for comment 96/205026 DC ISBN 0 580 27928 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee EPL/46, Cables, wires, waveguides, R.F. connectors, and accessories for communication and signalling, to Su

4、bcommittee EPL/46/1, Communication cables, upon which the following bodies were represented: AEA Technology British Approvals Service for Cables British Cable Makers Confederation British Telecommunications plc ERA Technology Federation of the Electronics Industry London Underground National Supervi

5、sing Inspectorate (UK NSI) Society of Cable Television Engineers Amendments issued since publication Amd. No. Date CommentsBSEN50117-6:1997 BSI 09-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 50117-6 3BSEN50117-6:1997 ii BSI 09-1999 Nation

6、al foreword This Part of BS EN50117 has been prepared by Subcommittee EPL/46/1, and is the English language version of EN50117-6:1997, published by the European Committee for Electrotechnical Standardization (CENELEC). This British Standard is published under the direction of the Electrotechnical Se

7、ctor Board whose Technical Committee EPL/46 has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and Europea

8、n developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL. A British Standard does not purport to include all the necessary provisions of a contract. Users of

9、 British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages2 to5 and a back cover

10、. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50117-6 April 1997 ICS 33.120.10 Descriptors: Outdoor drop coaxial cables, cabl

11、ed networks up to2150MHz English version Coaxial cables used in cabled distribution networks Part 6: Sectional specification for outdoor drop cables for use in networks operating at frequencies between5MHz and2150MHz Cbles coaxiaux de raccordement pour rseaux cbls Partie 6: Spcification intermdiaire

12、 pour cbles usage extrieur de rseaux fonctionnant une frquence comprise entre5MHz et 2150 MHz Koaxialkabel fr Kabelverteilanlagen Teil 6: Rahmenspezifikation fr Hausanschlukabel fr Anlagen fr Frequenzen von5 MHz bis2150MHz This European Standard was approved by CENELEC on1996-12-09. CENELEC members

13、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 t

14、o 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 made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has t

15、he same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Co

16、mmittee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC m

17、embers. Ref. No. EN 50117-6:1997 EEN50117-6:1997 BSI 09-1999 2 Foreword This European Standard was prepared by SC46XA, Coaxial cables, of Technical Committee CENELEC TC46X, Communication cables. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN5

18、0117-6 on1996-12-09. The following dates were fixed: Contents Page Foreword 2 1 Scope 3 2 Reference standards 3 3 Definitions 3 4 Materials and cable construction 3 6 Identification marking and labelling 3 9 Materials and cable construction tests 3 10 Mechanical and thermal characteristics 4 11 Elec

19、trical characteristics 5 12 Quality assessment procedures 5 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn

20、 (dow) 1997-12-01EN50117-6:1997 BSI 09-1999 3 1 Scope This Sectional Specification is intended to be used in conjunction with Generic Specification EN50117 for Coaxial Cables for use in Cabled Distribution Systems. This Sectional Specification applies to drop cables for outdoor applications in netwo

21、rks (e.g. SMATV) whose frequency of operation is within the range5MHz 2150MHz. The purpose of the standard is to specify values and preferential characteristics of the cables, and to identify the applicable tests from the Generic Specification. Reference is made to suitable schemes for Quality Asses

22、sment. The numbering of the clauses is the same as in the Generic Specification. ALL THE CLAUSES FROM THE GENERIC APPLICABLE UNLESS OTHERWISE STATED IN THIS SECTIONAL SPECIFICATION. Any variations from the generic specification are also detailed in this specification. 2 Reference standards EN50117,

23、Generic Specification for Coaxial Cables used in Cabled Distribution Networks. 3 Definitions Terminology, units of measure and symbols are the same as in the Generic Specification. 4 Materials and cable construction 4.3 Dielectric Unless otherwise specified nominal cable diameter over the dielectric

24、 should preferably be selected from the following table; 4.4 Outer conductor or screen When braiding is used, the braid angle according to3.2.2.1 shall be between15 and45 . The coverage factor according to3.2.2.4 shall be greater than or equal to65%, or, when the cable is provided with a metal foil,

25、 greater than or equal to25%. These values are also valid for cables with two bidirectional layers of helically wound wires. 4.5 Sheath The sheaths of cables covered by this Sectional Specification shall be in Polyethylene (PE). Sheaths shall be in black PE for aerial applications. For aerial figure

26、-of-eight cables, the messenger shall be solid or stranded, made from galvanized or phosphated steel, or aluminium alloy wires. The messenger type shall be specified in the detail specifications. NOTETests on messenger wires remain under consideration. 6 Identification marking and labelling 6.2 Shea

27、th marking Cables shall be marked on the outer sheath with i) Cable type ii) Supplier identification. at least once per metre. Additional marking is permissible provided i) and ii) above are clearly identifiable. Sheath marking shall not be easily removable (preferably via the use of embossing or in

28、k). 9 Materials and cable construction tests 9.4 Ovality Not applicable 3,7 mm 4,8 mm 6,9 mm 7,2 mmEN50117-6:1997 4 BSI 09-1999 9.5 Carbon black content Applicable for black PE sheaths only. 9.6 Tensile strength and elongation after break for metals Applicable only for inner copper conductor. 9.7 Te

29、nsile strength and elongation after break for metals Applicable only for copper clad steel inner conductors. 9.8 Torsion test for copper clad metals Applicable only for copper clad steel inner conductors. 9.9 Tensile strength and elongation for plastics Applicable on the outer sheath of the cable. R

30、equirements Plastic materials used in the construction of these cable shall meet the requirements of HD624 as follows; 9.10 Flammability Not applicable. 10 Mechanical and thermal characteristics 10.1 Adhesion of dielectric The test shall be performed to determine the value of the adhesion of the die

31、lectric to the inner conductor. The application of this test on semi air spaced cables is under consideration. The adhesion of the dielectric to the inner conductor, Fa, shall be given in MPa by the following: Fa = F/(pi*d*l) where Fa is in MPa F is the strip force in Newtowns d is the diameter of t

32、he inner conductor in mm lis the length of the sample in mm Requirements The maximum value shall be1,0 MPa. The minimum value shall be0,1 MPa. Where the diameter of the inner conductor is smaller than1,6mm the test shall be performed on a25mm sample length (l). Otherwise it shall be performed on a50

33、mm sample length. 10.2 Bending 10.2.1 Multiple bending Under consideration. 10.2.2 Flexing Not applicable. 10.4 Crush resistance of cable Applicable with an applied load of F = 700 N. The measurement will be done in accordance with11.9.2 with a rise time of k1 ns. After a recovery time of no more th

34、an5 minutes the maximum irregularity shall be less than1%. 10.6 Climatic tests 10.6.1 Climatic sequence Applicable. The cables shall comply with one of the two following classes; i) Class 40/70/4 (IEC 68) Polyethylene sheaths HD624.4EN50117-6:1997 BSI 09-1999 5 ii) Class 20/70/4 (IEC 68) 10.6.2 Damp

35、 Heat Not applicable. 11 Electrical characteristics 11.2 Insulation resistance Applicable Requirement The insulation resistance shall be not less than10 4Mohm.km. 11.3 Voltage test of dielectric Applicable with a voltage of2kV DC or1,5kV ACrms. 11.5.1 Mean characteristic impedance The mean character

36、istic impedance shall be757 37. 11.6 Return loss Applicable, with required values in accordance with the following table. In each frequency band, 3 peak values up to4dB lower than the specified limit are permissible. 11.7 Relative propagation velocity (velocity ratio) The value may be given in the d

37、etail specification for information. 11.8 Longitudinal loss The longitudinal loss shall not exceed the values stated in the detail specification. The values shall be given for at least the following frequencies 5 50 100 200 400 800 1 000 1600 2150MHz 11.9 Regularity of impedance The measurement shal

38、l be performed on both ends of delivery lengths. When method A is used the regularity shall be better than40dB. When method B is used the regularity shall be better than1%. 11.10 Screening attenuation The screening attenuation shall be measured after subjecting the cable length to the test10.2.1 and

39、 shall be in accordance with the following table; 11.11 Transfer impedance Under consideration. 12 Quality assessment procedures Under consideration. 5 30 30 470 470 862 862 2 150 MHz MHz MHz MHz k 18 dB/100m 23 23 dB 20 dB 18 dB (ffs) 18 dB/100m 20 20 dB 18 dB 16 dB (ffs) NOTE is the longitudinal l

40、oss at800MHz Frequency Band ScreeningAttenuation 30 470 MHz 470 1000 MHz 1 000 2150 MHz 75 dB 75 dB 65 dB (ffs)BS EN 50117-6:1997 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the U

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