1、BSI Standards PublicationBS EN 50117-4-2:2015Coaxial cablesPart 4-2: Sectional specification for CATV cables up to 6 GHz used in cabled distribution networksBS EN 50117-4-2:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50117-4-2:2015. The UK participation
2、 in its preparation was entrusted to Technical Committee EPL/46, Cables, wires and waveguides, radio frequency connectors and accessories for communication and signalling.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purpo
3、rt to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 85694 5 ICS 33.120.10 Compliance with a British Standard cannot confer immunity from legal obliga
4、tions.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2015.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 50117-4-2:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50117-4-2 September 2015 ICS 33.120.
5、10 English Version Coaxial cables - Part 4-2: Sectional specification for CATV cables up to 6 GHz used in cabled distribution networks Cbles coaxiaux - Partie 4-2: Spcification intermdiaire relative aux cbles des rseaux cbls de tlvision jusqu 6 GHz, utiliss dans les rseaux de distribution par cblesK
6、oaxialkabel - Teil 4-2: Rahmenspezifikation fr CATV-Kabel bis zu 6 GHz fr Kabelverteilanlagen This European Standard was approved by CENELEC on 2015-06-22. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard t
7、he 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 CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English,
8、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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Aust
9、ria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spai
10、n, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of
11、exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50117-4-2:2015 EBS EN 50117-4-2:2015EN 50117-4-2:2015 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions 4 4 Requirements for cable construction 5 4.1 General 5
12、 4.2 Inner conductor 5 4.3 Dielectric . 5 4.4 Outer conductor or screen . 5 4.5 Filling compounds . 5 4.6 Moisture barriers 5 4.7 Wrapping layers . 5 4.8 Sheath . 5 4.9 Metallic protection . 6 4.10 Cable integral suspension strand (Messenger wire) . 6 4.11 Oversheath . 6 4.12 Fauna proofing . 6 4.13
13、 Chemical and/or environmental proofing . 6 4.14 Cable identification 6 4.15 Labelling . 6 5 Tests for completed cables 7 5.1 Electrical tests 7 5.2 Mechanical tests 9 5.3 Environmental tests. 11 5.4 Fire performance test methods 11 6 Cable types . 12 Bibliography 13 Tables Table 1 Low-frequency and
14、 D.C. electrical measurements . 7 Table 2 High-frequency electrical and transmission measurements . 7 Table 3 Mechanical tests . 9 Table 4 Environmental tests . 11 Table 5 Cable types - Dimensions and ratings . 12 BS EN 50117-4-2:2015EN 50117-4-2:2015 3 European foreword This document (EN 50117-4-2:
15、2015) has been prepared by CLC/SC 46XA “Coaxial cables“ of CLC/TC 46X “Communication cables“. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2016-06-22 latest date by w
16、hich the national standards conflicting with this document have to be withdrawn (dow) 2018-06-22 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such pate
17、nt rights. This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC). BS EN 50117-4-2:2015EN 50117-4-2:2015 4 1 Scope This sectional specification relates to EN 50117-1 and should be read in conjunc
18、tion with this generic specification. This specification applies to indoor drop cables for use in cabled distribution systems operating at temperature between -40 C and +70 C1)and at frequencies between 5 MHz and 6 000 MHz and complying with the requirements of EN 50083. These cables are suitable to
19、 implement the network type Case D as depicted in Figure 1 and subclause 6.6 of EN 60728-1-1:2014. The purpose of this European Standard is to specify the applicable test methods and requirements for the electrical, mechanical, and environmental and fire performance of the cables. 2 Normative refere
20、nces The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN
21、 50117-1:2002, Coaxial cables Part 1: Generic specification EN 50289-1-6, Communication cables Specifications for test methods Part 1-6: Electrical test methods Electromagnetic performance EN 50289-3-9:2001, Communication cables Specifications for test methods Part 3-9: Mechanical test methods Bendi
22、ng tests EN 50290-1-2:2004, Communication cables Part 1-2: Definitions EN 50290-2-22, Communication cables Part 2-22: Common design rules and construction PVC sheathing compounds EN 50290-2-27, Communication cables Part 2-27: Common design rules and construction Halogen free flame retardant thermopl
23、astic sheathing compounds prEN 50290-2-37, Communication cables Part 2-37: Common design rules and construction Polyethylene insulation for coaxial cables prEN 50290-2-38, Communication cables Part 2-38: Common design rules and construction Polyethylene insulation for coaxial cables EN 62153-1-1, Me
24、tallic telecommunication cable test methods Part 1-1: Electrical Measurement of the pulse/step return loss in the frequency domain using the Inverse Discrete Fourier Transformation (IDFT) (IEC 62153-1-1) IEC 61196-1-115, Coaxial communication cables Part 1-115: Electrical test methods Test for pulse
25、 return loss (regularity of impedance) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 50290-1-2:2004 and EN 50117-1:2002 apply. 1) This value is valid for applications without ampacity only. BS EN 50117-4-2:2015EN 50117-4-2:2015 5 4 Requirements for
26、cable construction 4.1 General Designing the cable, consideration should be paid to the maximum admissible current stated in the detail specification. It is assumed that the raise of temperature of the inner conductor when submitted to the maximum current under nominal ambient conditions does not af
27、fect the mechanical and electrical properties of the cable. 4.2 Inner conductor The conductor shall meet the requirements of 4.2 of EN 50117-1:2002, and shall be solid and can be plain or metal coated. Dimensions shall be in accordance with the detailed specification. There shall be no joint made su
28、bsequent to the last drawing operation. 4.3 Dielectric The dielectric material(s) shall be in accordance with 4.3 of EN 50117-1:2002 and shall consist of polyolefin materials, with prEN 50290-2-37 (polyethylene) or prEN 50290-2-38 (polypropylene). Dimensions shall be in accordance with the detail sp
29、ecification. Unless otherwise specified, the nominal diameter over the dielectric should be one of the preferred values, namely 3,7 mm2), 4,8 mm and 7,2 mm. 4.4 Outer conductor or screen The construction and material of the outer conductor (or screen) shall be meet the requirements of 4.4 items b),
30、f) or g) of EN 50117-1:2002. Where option b) is used, a double braid layer is required. For braid constructions or helically wound wires, the braid angle shall be between 15 and 45. The coverage factor shall be greater than or equal to 65 %, or, when the cable is provided with a metal foil, greater
31、than or equal to 25 %. These values are also valid for cables with two bi-directional layers of helically wound wires. Dimensions shall be in accordance with the detail specification. 4.5 Filling compounds Not applicable. 4.6 Moisture barriers Not applicable. 4.7 Wrapping layers Not applicable. 4.8
32、Sheath Sheath material(s) shall meet the requirements of the EN 50290-2-22 for PVC or EN 50290-2-27 for halogen free flame retardant materials. The sheath shall also meet the requirements of 4.8 of EN 50117-1:2002. 2) Smaller cables are not suitable as the attenuation at 6 GHz might be too high. BS
33、EN 50117-4-2:2015EN 50117-4-2:2015 6 Dimensions shall be in accordance with the detail specification. 4.9 Metallic protection Not applicable. 4.10 Cable integral suspension strand (Messenger wire) Not applicable. 4.11 Oversheath Not applicable. 4.12 Fauna proofing Not applicable. 4.13 Chemical and/o
34、r environmental proofing Not applicable. 4.14 Cable identification 4.14.1 General Cable identification shall be in accordance with 4.14 of EN 50117-1:2002. 4.14.2 Sheath marking Sheath marking shall be achieved as a non-degradable print containing the following minimum information: designation of th
35、e cable; attenuation value (in dB/100 m at 800 MHz, rounded); screening class; Euro-class; name of supplier. EXAMPLE EN 50117-4-2 21 Class A 4.15 Labelling Unless otherwise specified in the detail specification drums or coils shall be provided with a label with a non-degradable print containing the
36、following minimum information: designation of the cable; attenuation value (in dB/100 m at 800 MHz, rounded); screening class; Euro-class; name of supplier; batch part number; length of cable. EXAMPLE EN 50117-4-2 21 Class A 03/12 543m BS EN 50117-4-2:2015EN 50117-4-2:2015 7 5 Tests for completed ca
37、bles 5.1 General When tested in accordance with the requirements of EN 50117-1, the requirements given below shall apply. 5.2 Electrical tests 5.2.1 Low-frequency and D.C. electrical measurements Table 1 Low-frequency and D.C. electrical measurements EN 50117-1 Subclause n Parameter Requirements/Rem
38、arks 5.1.1.1 Conductor resistance Applicable, value in accordance with the detail specification 5.1.1.2 Dielectric strength 2 kV D.C. or 1,5 kV A.C. for 1 min 5.1.1.3 Insulation resistance 104M x km 5.1.1.4 Mutual capacitance When required, in accordance with the detail specification 5.1.1.5 Voltage
39、 test of sheath 2,5 kV A.C. or 3,75 kV D.C., unless otherwise specified in the relevant detail specification. Test in accordance with EN 50289-1-X a5.1.1.6 Discharge (corona) test Not applicable 5.1.1.7 Voltage proof Not applicable 5.1.1.8 Power rating Not applicable aTest procedure is under conside
40、ration by CLC/SC 46XA. 5.2.2 High-frequency electrical and transmission measurements Table 2 High-frequency electrical and transmission characteristics measurements EN 50117-1 Subclause n Parameter Requirements/Remarks 5.1.2.1 Velocity of propagation May be specified for information purposes only in
41、 the detail specification. 5.1.2.2 Longitudinal attenuation (operational attenuation) The cable shall comply at any frequency with the equation cfbfa +, (dB/100 m). In case of copper clad conductor material a term fd / should be added, to better match the curve at low frequencies. The coefficients a
42、, b, c and d shall be given in the relevant detail specification as well as the discrete values at 200 MHz, 800 MHz, 2 483 MHz and 5 875 MHz. Note 1: f is in MHz. Note 2: The value of d can be calculated using k-factors as defined in EN 50290-2-1:2005, 6.5 and Tables 8 and 20. 5.1.2.3 Characteristic
43、 impedance 75 3 BS EN 50117-4-2:2015EN 50117-4-2:2015 8 EN 50117-1 Subclause n Parameter Requirements/Remarks 5.1.2.4 Return loss aFor cables where 18 dB/100 m at 800 MHz RL 23 dB from 5 MHz to 30 MHz RL 23 dB from 30 MHz to 470 MHz RL 20 dB from 470 MHz to 1 000 MHz RL 18 dB from 1 000 MHz to 2 000
44、 MHz RL 16 dB from 2 000 MHz to 3 000 MHz RL 15 dB from 3 000 MHz to 6 000 MHz (ffs) For cables where 18 dB/100 m at 800 MHz RL 20 dB from 5 MHz to 30 MHz RL 20 dB from 30 MHz to 470 MHz RL 18 dB from 470 MHz to 1 000 MHz RL 16 dB from 1 000 MHz to 2 000 MHz RL 15 dB from 2 000 MHz to 3 000 MHz RL 1
45、5 dB from 3 000 MHz to 6 000 MHz (ffs) ( is the longitudinal attenuation) Measurement accuracy In case of digital signal processing, the accuracy of the return loss measurement, ar,fdepends on the frequency step f in the measured frequency range. The frequency spacing in the measured frequency range
46、 is frequency dependent and shall be in accordance with the following equation ( ) 1106,8683004,110,frarfafwhere a(f) is the attenuation of the cable at the measured frequency point in dB/100 m, ar,fis the maximum uncertainty of measurement due to frequency spacing; and vris the nominal propagation
47、velocity. The measurement inaccuracy ar,fshall be 1 dB unless otherwise stated in the relevant detail specification. b5.1.2.5 Regularity of impedance Perform on both ends of tested cable Regularity 40 dB respectively 1 % Test procedure: IEC 61196-1-115 c, (time domain) or EN 62153-1-1, (transformati
48、on from frequency domain into time domain by IDFT). 5.1.2.6 Transfer impedance Screening Class A: 5 m/m from 5 MHz to 30 MHz; Screening Class A+: 2,5 m/m from 5 MHz to 30 MHz. Test procedure according to EN 50289-1-6, triaxial method, after completion of the flexure test according to 5.2.9 of this s
49、tandard. BS EN 50117-4-2:2015EN 50117-4-2:2015 9 EN 50117-1 Subclause n Parameter Requirements/Remarks 5.1.2.7 Screening attenuation Screening Class A: 85 dB from 30 MHz to 1 000 MHz; 75 dB from 1 000 MHz to 2 000 MHz; 65 dB from 2 000 MHz to 3 000 MHz. 55 dB from 3 000 MHz to 6 000 MHz (ffs) Screening Class A+: 95 dB from 30 MHz to 1 000 MHz; 85 dB from 1 000 MHz to 2 000 MHz; 75
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