1、BRITISH STANDARDBS EN 50117-4:1996Incorporating Corrigendum No. 1Coaxial cables used in cabled distribution networks Part 4: Sectional specification for distribution and trunk cablesThe European Standard EN 50117-4:1996 has the status of a British StandardICS 33.120.10BS EN 50117-4:1996This British
2、Standard was published under the authority of the Standards Policy and Strategy Committee on 15 August 1996 The following BSI references relate to the work on this standard: Committee reference EPL/46/1 Special announcement in BSI News Update May 1996ISBN 0 580 26023 2Committees responsible for this
3、 British StandardThe preparation of this British Standard was entrusted by Technical Committee EPL/46, Cables, wires and waveguides, RF connectors and accessories for cabling and signalling, to Subcommittee EPL/46/1, Communication cables, on which the following bodies were represented:AEA Technology
4、British Approvals Services for CablesBritish Broadcasting CorporationBritish Cable Makers ConfederationBritish Railways BoardBritish Telecommunications plcCable Communication AssociationConfederation of Aerial IndustriesERA TechnologyFederation of the Electronics IndustryLondon UndergroundMinistry o
5、f DefenceSociety of Cable Television EngineersAmendments issued since publicationAmd. No. Date Comments15924 Corrigendum No. 1Addition of further supersession details BSI 200630 June 2006BS EN 50117-4:1996 iContentsPageCommittees responsible Inside front coverNational foreword iiForeword 21Scope 32
6、Normative references 33 Definitions 34 Materials and cable construction 36 Identification marking and labelling 39 Materials and cable construction tests 310 Mechanical and thermal characteristics 411 Electrical characteristics measurement and test methods 412 Quality assessment procedures 5Annex A
7、(informative) A-deviations 6List of references Inside back coveri BSI 2006BS EN 50117-4:1996iiNational forewordThis British Standard has been prepared by Subcommittee EPL/46/1 and is the English language version of EN 50117-4:1996, Coaxial cables used in cabled distribution networks Part 4: Sectiona
8、l specification for distribution and trunk cables, published by the European Committee for Electrotechnical Standardization (CENELEC).This Part should be read in conjunction with BS EN 50117-1:2002. Together with BS EN 50117-1:2002, BS EN 50117-2-1:2005, BS EN 50117-2-2:2004, BS EN 50117-2-3:2004 an
9、d BS EN 50117-3:1996, it supersedes BS 5425-1:1986 which is withdrawn.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”,
10、 or by using the “Search” facility of the BSI Standards Electronic Catalogue or of British Standards Online.A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.Compliance with a British St
11、andard 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, the EN title page, pages 2 to 7 and a back cover.This standard has been updated (see copyright date) and may have had amendments incorporate
12、d. This will be indicated in the amendment table on the inside front cover. BSI 2006EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN 50117-4February 1996ICS 33.120.10 Descriptors: Coaxial cables, cabled distribution networks, sectional specification for distribution and trunk cablesEnglish versio
13、nCoaxial cables used in cabled distribution networks Part 4: Sectional specification for distribution and trunk cablesCbles coaxiaux pour rseaux cbls de distribution Partie 4: Spcification intermdiaire pour cbles de distribution et de transfertKoaxialkabel fr Kabelverteilanlagen Teil 4: Rahmenspezif
14、ikation fr Verteiler- und LinienkabelThis European Standard was approved by CENELEC on 1995-07-04. 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 any alteration.U
15、p-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 made by translation
16、 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Ital
17、y, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050
18、Brussels 1996 Copyright reserved to CENELEC membersRef. No. EN 50117-4:1996 EEN 50117-4:19962ForewordThis European Standard was prepared by Subcommittee SC 46XA, Coaxial cables, of the Technical Committee CENELEC SC 46X, Communication cables.The text of the draft was submitted to the formal vote and
19、 was approved by CENELEC as EN 50117-4 on 1995-07-04.The following dates were fixed:Annexes designated “informative” are given for information only. In this standard, annex A is informative. latest date which the EN has to be implemented at national level by publication of an identical national stan
20、dard or by endorsement (dop) 1996-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1996-07-01 BSI 2006EN 50117-4:1996 31 ScopeThis Sectional Specification is intended to be used in conjunction with the Generic Specification EN 50117-1, Coaxial cabl
21、es for use in cabled distribution networks operating at frequencies between 5 MHz and 862 MHz.This Sectional Specification applies to distribution and trunk cables.The purpose of the standard is to specify values and preferential characteristics of the cables, and to identify the applicable tests fr
22、om the Generic Specification. Reference is made to suitable schemes for Quality Assessment.The numbering of the clauses is the same as in the Generic Specification. All the clauses from the Generic Specification are applicable unless otherwise stated in this Sectional Specification. Any variations f
23、rom the Generic Specification are also detailed in this specification.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are liste
24、d hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).EN 5011
25、7-1, Coaxial cables used in cabled distribution networks Part 1: Generic specification.HD 624.4, Materials used in communication cables Part 4: PE sheathing (under consideration).3 DefinitionsTerminology, units of measure, and symbols, are the same as in the Generic Specification.4 Materials and cab
26、le construction4.3 DielectricUnless otherwise specified, nominal cable diameter over the dielectric should preferably be selected from the following:4.4 Outer conductor or screenAll outer conductors shall be type b, c or d of subclause 4.4 of the Generic Specification.4.5 SheathThe sheath of cables
27、covered by this Sectional Specification shall be in polyethylene (PE). Sheaths shall be in black PE for aerial applications.For aerial figure-of-eight cables, the messenger shall be solid or stranded, made of galvanized or phosphated steel, or aluminium alloy wires.The messenger type shall be specif
28、ied in the Detail Specifications.NOTE Tests on messenger wires are under consideration.6 Identification marking and labelling6.2 Sheath markingCables shall be marked on the outer sheath withi) Cable typeii) Supplier identificationat least once per metre.Additional marking is permissible provided i)
29、and ii) above are clearly identifiable. Sheath marking shall not be easily removable (preferably via the use of embossing or ink).9 Materials and cable construction tests9.4 OvalityApplicable.The application of this test to semi air spaced cables is under consideration.9.5 Carbon black contentApplic
30、able to black PE sheaths only.9.6 Tensile strength and elongation after break for metalsApplicable only for copper and copper clad aluminium inner conductors.9.7 Tensile strength and elongation at break for metalsNot applicable.9.8 Torsion test for copper clad metalsApplicable only for copper clad a
31、luminium inner conductors.6,9 mm 8,8 mm 13,5 mm19,4 mm 23 mm 29 mm BSI 2006EN 50117-4:199649.9 Tensile strength and elongation for plasticsApplicable on the outer sheath of the cable.RequirementsPlastic materials used in the construction of these cables shall meet the requirements of HD 624 as follo
32、ws;9.10 FlammabilityNot applicable.10 Mechanical and thermal characteristics10.1 Adhesion to dielectricThe 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.The adhesio
33、n of the dielectric to the inner conductor, Fa, shall be given in MPa by the following:Fa = F/(*d*l)where Fa is in MPaRequirementsThe maximum value shall be in 1,0 MPa.The minimum value shall be 0,1 MPa.Where the diameter of the inner conductor is smaller than 3,3 mm for copper clad aluminium the te
34、st shall be performed on a 25 mm sample length (l). Otherwise it shall be performed on a 50 mm sample length.10.2 Bending10.2.2 FlexingNot applicable.10.4 Crush resistance of cableApplicable with an applied load of F = 700 N.Testing will be done in accordance with 11.9.2 with a rise time of 1 ns.Aft
35、er a recovery time of no more than 5 min the maximum irregularity shall be less than 1 %.10.5 Vibration test and aerial figure eight cablesApplicable (under consideration in the Generic Specification).10.6 Climatic tests10.6.1 Climatic sequenceApplicable.The cables shall comply with one of the two f
36、ollowing classes:i) Class 40/70/4 (IEC 68)ii) Class 20/70/4 (IEC 68)10.6.2 Damp heatNot applicable.11 Electrical Characteristics Measurement and test methods11.2 Insulation resistanceApplicable.RequirementThe insulation resistance shall be not less than 104M.km.11.3 Voltage test of dielectricApplica
37、ble with a voltage of 3 kV d.c. or 2 kV a.c. rms.11.5.1 Mean characteristic impedanceThe mean characteristic impedance shall be 75 3 .11.6 Return lossApplicable, with required values in accordance with the following table.NOTE a is the longitudinal loss at 800 MHz In each frequency band, 3 peak valu
38、es up to 4 dB lower than the specified limit are permissible.11.7 Relative propagation velocity (velocity ratio)The value may be given in the Detail Specification for information.Polyethylene sheaths HD 624.4F is the strip force in Newtonsd is the diameter of the inner conductor in mml is the length
39、 of the sample in mma (dB/100m)5 30 MHz30 470 MHz470 862 MHza 4 26 dB 26 dB 20 dB4 a 6 26 dB 26 dB 22 dB6 a 14 23 dB 23 dB 20 dB BSI 2006EN 50117-4:1996 511.8 Longitudinal lossThe longitudinal loss shall not exceed the values stated in the Detail Specification.The values shall be given for at least
40、the following frequencies:5 50 100 200 400 800 MHz11.9 Regularity of impedanceThe measurement shall be performed on both ends of delivery lengths.When method A is used the regularity shall be better than 46 dB.When method B is used the regularity shall be better than 0,5 %.11.10 Screening attenuatio
41、nThe screening attenuation shall be measured after subjecting the cable length to the test of 10.2.1 and shall be not less than 85 dB from 30 MHz up to 1 000 MHz.11.11 Transfer impedanceUnder consideration.12 Quality assessment proceduresUnder consideration.5 BSI 2006EN 50117-4:19966Annex A (informa
42、tive) A-deviationsA-deviation: National deviation due to regulations, the alteration of which is for the time being outside the competence of the CEN/CENELEC member.This European Standard does not fall under any Directive of the EC.In the relevant CENELEC countries these A-deviations are valid inste
43、ad of the provisions of the European Standard until they have been removed.Clause DeviationGeneral Denmark (Act no. 1065 of 23 December 1992)For coaxial trunk and distribution cables installed underground the outer conductors shall be a closed copper tube. Copper foil can be used if it is glued to t
44、he dielectric material and the overlap is minimum 10 %. BSI 2006BS EN 50117-4:1996List of referencesSee national foreword.7 BSI 2006BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the
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