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

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1、BRITISH STANDARD BS EN 50117-5:1997 Coaxial cables used in cabled distribution networks Part 5: Sectional specification for indoor drop cables for use in networks operating at frequencies between5MHz and2150MHz The European Standard EN50117-5:1997 has the status of a British Standard ICS 33.120.10BS

2、 EN 50117-5:1997 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes into effect on 15 July1997 BSI 09-1999 The following BSI references relate to the work on this standard: Committee r

3、eference EPL/46/1 Draft for comment 96/205026 DC ISBN 0 580 27927 8 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

4、Subcommittee 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 Super

5、vising Inspectorate (UK NSI) Society of Cable Television Engineers Amendments issued since publication Amd. No. Date CommentsBS EN 50117-5:1997 BSI 09-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN50117-5 3BS EN 50117-5:1997 ii BSI 09-1999 N

6、ational foreword This Part of BS EN50117 has been prepared by Subcommittee EPL/46/1, and is the English language version of EN50117-5:1997, published by the European Committee for Electrotechnical Standardization (CENELEC). This British Standard is published under the direction of the Electrotechnic

7、al Sector 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 Eu

8、ropean 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 W44AL. A British Standard does not purport to include all the necessary provisions of a contract. Users

9、 of 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 to4 and a back co

10、ver. 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 EN50117-5 April 1997 ICS 33.120.10 Descriptors: Indoor drop coaxial cables, cab

11、led networks up to2150MHz English version Coaxial cables used in cabled distribution networks Part 5: Sectional specification for indoor drop cables for use in networks operating at frequencies between5MHz and2150MHz Cbles coaxiaux de raccordement pour rseauxcbls Partie 5: Spcification intermdiaire

12、pourcbles usage intrieur de rseaux fonctionnant une frquence comprise entre5MHz et2150MHz Koaxialkabel fr Kabelverteilanlagen Teil5:Rahmenspezifikation fr Hausinstallationskabel fr Anlagen fr Frequenzen von5MHz bis2150MHz This European Standard was approved by CENELEC on1996-12-09. CENELEC members a

13、re 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

14、 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 th

15、e 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 UnitedKingdom. CENELEC European Comm

16、ittee 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 mem

17、bers. Ref. No. EN50117-5:1997 EEN 50117-5:1997 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 EN501

18、17-5 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 Test for mechanical and thermal characteristics 3

19、11 Electrical characteristics 4 12 Quality assessment procedures 4 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 wi

20、thdrawn (dow) 1997-12-01EN 50117-5:1997 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 indoor applications i

21、n networks (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

22、 Assessment. The numbering of the clauses is the same as in the Generic Specification. All the clauses from the generic are applicable unless otherwise stated in this sectional specification. Any variations from the generic specification are also detailed in this specification. 2 Reference standards

23、 EN50117, 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 t

24、he dielectric should preferably be selected from the following table; 4.4 Outer conductor or screen 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, greater t

25、han or equal to25%. These values are also valid for cables with two bidirectional layers of helically wound wires. 4.5 Sheath The sheath of cables covered by this Sectional Specification shall be in PVC, or flame retardant materials, which may include halogen free materials. 6 Identification marking

26、 and labelling 6.2 Sheath 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

27、use of embossing or ink). 9 Materials and cable construction tests 9.4 Ovality Not applicable 9.6 Tensile strength and elongation after break for metals Applicable only for copper inner conductors. 9.7 Tensile strength and elongation at break for metals Applicable only for copper clad steel inner co

28、nductors. 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. Requirements Plastic materials used in the construction of these cables shall meet the requirements

29、of HD624 as follows; 10 Test for mechanical and thermal characteristics 10.1 Adhesion of dielectric The test shall be performed to determine the value of the adhesion of the dielectric to the inner conductor. The application of this test on semi air spaced cables is under consideration. 2,9mm 3,7mm

30、4,8mm 7,2mm PVC sheathing compounds Flame retardant compounds Halogen free flame retardant compounds HD624.2 HD624.6 HD624.7EN 50117-5:1997 4 BSI 09-1999 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 Requirements

31、 The maximum value shall be1,0Mpa. The minimum value shall be0,1Mpa. 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 a50mm sample length. 10.2 Bending 10.2.1 Multiple bending Under Consideration

32、 10.4 Crush resistance of cable Applicable with an applied load of F =700N. Testing will be done in accordance with11.9.2 with a rise time ofk1ns. After a recovery time of no more than5 minutes the maximum irregularity shall be less than1%. 10.5 Vibration test for aerial figure eight cables Not appl

33、icable 10.6 Climatic tests 10.6.1 Climatic sequence Not applicable 11 Electrical characteristics 11.2 Insulation resistance Applicable Requirement The insulation resistance shall be not less than10 4 Mohm.km. 11.3 Voltage test of dielectric Applicable with a voltage of2kV DC or1,5kVACrms. 11.5.1 Mea

34、n characteristic impedance The mean characteristic impedance shall be757 37. 11.6 Return loss Applicable, with required values in accordance with the following table. NOTE is the longitudinal loss at800MHz In each frequency band,3 peak values up to4dB lower than the specified limit are permissible.

35、11.7 Relative propagation velocity (velocity ratio) The value may be given in the detail 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 1

36、00 200 400 800 1000 1600 2150MHz 11.9 Regularity of impedance The measurement shall 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 att

37、enuation shall be measured after subjecting the cable length to the test10.2.2 and shall be in accordance with the following table; 11.11 Transfer impedance Under consideration. 12 Quality assessment procedures Under consideration. F is the strip force in Newtons d is the diameter of the inner condu

38、ctor in mm l is the length of the sample in mm 5 30 MHz 30 470 MHz 470 862 MHz 862 2150 MHz k18dB/100m 23dB 23dB 20dB 18dB (ffs) 18dB/100m 20dB 20dB 18dB 16dB (ffs) Frequency Band Screening Attenuation 30 470MHz 470 1000MHz 1000 2150MHz 75dB 75dB 65dB(ffs)blankBS EN 50117-5:1997 BSI 389 Chiswick Hig

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