1、BRITISH STANDARD BS EN50288-7:2005Multi-element metalliccables used in analogueand digitalcommunication andcontrol Part 7: Sectional specification forinstrumentation and control cablesICS 33.120.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59
2、g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Incorporating corrigendum July 2009BS EN 50288-7:2005National forewordThis British Standard is the UK implementation of EN 50288-7:2005. It supersedes BS 5308-1:1986 and BS 5308-2:1986, which are withdra
3、wn.Cable types that have not been included in BS EN 50288-7:2005, and that were previously included in BS 5308-1:1986 and BS 5308-2:1986 (in preparation) may be found in BS publications PAS 5308-1:2009 and PAS 5308-2:2009.The UK participation in its preparation was entrusted to Technical Committee E
4、PL/46, Cables, wires and waveguides, R.F. 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 purport to include all the necessary provisions of a contract. Users are
5、responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 December 2005 BSI 2009ISBN 978 0 580 66698 8 MHE/2, Wire ropes.978 0 5
6、80 60263 4Implementation of CEN amendmentA1:2005March 2006 Implementation of CEN amendment A :2002 8Amendments/corrigenda issued since publicationDate Comments31 July 2009 Supersession details and additional information added to the National forewordEUROPEAN STANDARD EN 50288-7 NORME EUROPENNE EUROP
7、ISCHE NORM September 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form
8、and by any means reserved worldwide for CENELEC members. Ref. No. EN 50288-7:2005 E ICS 33.120.10 English version Multi-element metallic cables used in analogue and digital communication and control Part 7: Sectional specification for instrumentation and control cables Cbles mtalliques lments multip
9、les utiliss pour les transmissions et les commandes analogiques et numriques Partie 7: Spcification intermdiaire pour les cbles dinstrumentation et de contrle Mehradrige metallische Daten- und Kontrollkabel fr analoge und digitale bertragung Teil 7: Rahmenspezifikation fr Instrumenten- und Kontrollk
10、abel This European Standard was approved by CENELEC on 2005-04-01. 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. Up-to-date lists and bibliograph
11、ical 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 under the responsibility of a
12、 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
13、Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 50288-7:2005 - 2 - Foreword This European Standard was prepared by SC 46XC, Multicore, Multipair and Quad Data communication cables, of T
14、echnical 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 50288-7 on 2005-04-01. This Part 7 is to be used in conjunction with EN 50288-1. The following dates were fixed: latest date by which the
15、EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-04-01 latest date by which the national standards conflictingwith the EN have to be withdrawn (dow) 2008-04-01 _ BS EN 50288-7:2005- 3 - EN 50288-7:2005 Contents 1 Scope.5 2 Norma
16、tive references.5 3 Definitions, symbols and abbreviations 6 4 Cable construction .6 4.1 Conductor 6 4.2 Insulation .7 4.3 Cable elements7 4.4 Identification of cabling elements.8 4.5 Screening of cabling elements.8 4.6 Cable make-up 8 4.7 Filling compound8 4.8 Interstitial fillers8 4.9 Screening of
17、 the cable core .8 4.10 Moisture barriers9 4.11 Protective wrappings9 4.12 Inner sheath.10 4.13 Bedding layers .10 4.14 Metallic protection10 4.15 Integral suspension strand.11 4.16 Outer sheathing .11 4.17 Fauna protection11 4.18 Chemical and/or environmental protection.11 4.18.1 Lead sheath .12 4.
18、18.2 Multi-layer sheath.12 5 Test methods and requirements for completed cables.12 5.1 Electrical tests13 5.1.1 Low frequency and d.c. electrical measurements.13 5.2 Mechanical tests 13 5.3 Environmental tests .14 5.4 Fire performance test methods 14 Annex A (normative) Insulation thickness and conc
19、entricity - Selection of samples and evaluation of results.15 Annex B (normative) Copper braid screening .16 Annex C (normative) Determination of cable dimensions .17 Annex D (informative) Thermocouple extension and compensating conductors.22 BS EN 50288-7:2005EN 50288-7:2005 - 4 - Table 1 Minimum i
20、nsulation thickness .7 Table B.1 Braid wire diameter16 Table C.1 Steps to determine fictitious cable diameter 17 Table C.2 Conductor diameters.18 Table C.3 Lay up factors .19 Table C.4 Crush factors.19 Table C.5 Bedding radial thickness .20 Table C.6 Round armour wire20 Table C.7 Tape armour .20 Tab
21、le C.8 Braid armour wire size.21 Table D.1 Extension cables 22 Table D.2 Compensating cables22 BS EN 50288-7:2005- 5 - EN 50288-7:2005 1 Scope This sectional specification covers multi-element cables suitable for connecting instruments and control systems for analogue or digital signal transmission.
22、 They may or may not be screened and optionally may incorporate armouring and/or moisture or environmental protection layers. The cables shall have a mechanically robust construction and electrical transmission handling properties. The electrical, mechanical, transmission and environmental performan
23、ce characteristics of the cables, related to their reference test methods are detailed. This sectional specification is to be read in conjunction with EN 50288-1, which contains the essential provisions for its application. Cables covered by this specification have maximum rated voltages of 90 V, 30
24、0 V and 500 V a.c. These cables shall not be connected directly to mains electricity supply or other low impedance sources. Multi-element cables for use in analogue, digital and control circuits are not designed to be used for power supply. These cables should be installed in accordance with the app
25、licable local and national regulations. Cables intended to have limited circuit integrity in a fire are not covered by this specification, but they are however under consideration for future editions. There may be occasions when cables are required to have higher operating temperature ratings than t
26、hose provided by using materials specified by the EN 50290 series. Suitable alternative materials are under consideration. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undat
27、ed references, the latest edition of the referenced document (including any amendments) applies. Publication Year Title EN 10218-1 - Steel wire and wire products General Part 1: Test methods EN 10244-2 - Steel wire and wire products Non-ferrous metallic coatings on steel wire Part 2: Zinc or zinc al
28、loy coatings EN 10257-1 - Zinc or zinc alloy coated non-alloy steel wire for armouring either power cables or telecommunications cables Part 1: Land cables EN 50289 Series Communication cables - Specifications for test methods EN 50290 Series Communication cables EN 50307 - Lead and lead alloy sheat
29、h and sleeves of electric cables BS EN 50288-7:2005EN 50288-7:2005 - 6 - EN 60708 - Low-frequency cables with polyolefin insulation and moisture barrier polyolefin sheath (IEC 60708) EN 60811-1-1 - Insulating and sheathing materials of electric and optical cables Common test methods Part 1-1: Genera
30、l application Measurement of thickness and overall dimensions Tests for determining the mechanical properties (IEC 60811-1-1) HD 383 S2 - Conductors of insulated cables First supplement: Guide to the dimensional limits of circular conductors (IEC 60228 + IEC 60228A, mod.) HD 446.3 S1 - Thermocouples
31、 - Part 3: Extension and compensating cables tolerances and identification system (IEC 60584-3, mod.) IEC 60189-2 - Low-frequency cables and wires with PVC insulation and PVC sheath - Part 2: Cables in pairs, triples, quads and quintuples for inside installations 3 Definitions, symbols and abbreviat
32、ions For the purposes of this European Standard the definitions of EN 50288-1 apply in addition to the following: 3.1 foil a metal tape laminated to a plastic tape 4 Cable construction 4.1 Conductor Except for thermocouple extension and compensating cables, with conductors as described in Annex D, c
33、onductors shall be solid, stranded or flexible plain or metal coated copper in accordance with Class 1, 2 or 5 of HD 383 in the range of 0,5 mm to 2,5 mm. For multi-core cables the maximum conductor resistance shall be as HD 383, and for finished multi-pair, multi-triple and multi-quad cables the ma
34、ximum resistance of HD 383 shall be increased by 2 %. Conductor joints shall be as EN 50288-1. Stranded and flexible conductors shall consist of wires circular in cross section assembled, without insulation between them, by concentric stranding or by bunching. When the installed length of cable resu
35、lts in a high conductor resistance, larger conductor sizes can be used. BS EN 50288-7:2005- 7 - EN 50288-7:2005 4.2 Insulation The insulating material shall be selected from those listed below. It shall be applied to comply with the requirements of EN 50288-1. a) PVC EN 50290-2-21 b) Polyethylene EN
36、 50290-2-23 c) Polypropylene EN 50290-2-25 d) Halogen free flame retardant compound EN 50290-2-26 e) Cross-linked polyethylen EN 50290-2-29 The minimum thickness at any point of the insulation shall not be less than the value given in Table 1, for the specified voltage rating, and the concentricity
37、shall not fall below 75 % when measured using the procedure in Annex A. There may be occasions when cables are required to have higher operating temperature ratings than those provided by using materials specified by the EN 50290 series. Suitable alternative materials are under consideration. Table
38、1 Minimum insulation thickness Minimum thickness mm Voltage rating Conductor size mm290 V 300 V 500 V 0,5 0,20 0,26 0,44 0,75 0,20 0,26 0,44 1,0 0,26 0,26 0,44 1,5 0,30 0,35 0,44 2,5 - - 0,53 4.3 Cable elements Cable elements shall be in accordance with 4.3 of EN 50288-1. The lay length of a pair, t
39、riple or quad shall not exceed 100 mm for cables with conductor cross-section 1,5 mm, nor 150 mm for cables with conductor cross-section 2,5 mm. BS EN 50288-7:2005EN 50288-7:2005 - 8 - 4.4 Identification of cabling elements Unless otherwise specified e.g. by means of numbered cores or tapes, the cod
40、ing for identification shall be as given in IEC 60189-2 or EN 60708, as appropriate. The colours shall meet the requirements of 4.4 of EN 50288-1. Coloured or numbered non-hygroscopic binder tapes may be applied over screened cabling elements as identification. 4.5 Screening of cabling elements When
41、 screening of individual cable elements is specified, it shall be selected from those listed below and applied in accordance with 4.5 of EN 50288-1: a) a plain or coated metal braid with a minimum filling factor of 0,6 when calculated in accordance with Annex B; b) a combination of a foil, and a pla
42、in or coated metal braid with a minimum filling factor of 0,3 when calculated in accordance with Annex B. The use of a drain wire is optional when this type of screen is applied; c) a foil applied with a minimum overlap of 20 % and with a drain wire in direct contact with the metallic side of the fo
43、il. Metal braid wire diameters are given in Table B.1. 4.6 Cable make-up The cable elements shall be assembled together in concentric layers or in unit construction to form the cable core. The cable core assembly shall be protected by wrappings of non-hygroscopic tape. Successive layers may be separ
44、ated from each other by interlayer binders of non-hygroscopic tape. 4.7 Filling compound When a filling compound is specified, it shall be selected from the compounds given in EN 50290-2-28 and shall meet the requirements of 4.7 of EN 50288-1. 4.8 Interstitial fillers When fillers are used they shal
45、l meet the requirements of 4.8 of EN 50288-1. 4.9 Screening of the cable core The cable core shall be protected with a protective layer as described in 4.11 or 4.13 when it is covered with a screen. BS EN 50288-7:2005- 9 - EN 50288-7:2005 When screening of the cable core is specified, it shall be se
46、lected from those listed below, and applied in accordance with 4.9 of EN 50288-1: a) a plain or coated metal braid with a minimum filling factor of 0,6 when calculated in accordance with Annex B; b) a combination of a foil, and a plain or coated metal braid with a minimum filling factor of 0,3 when
47、calculated in accordance with Annex B. The use of a drain wire is optional when this type of screen is applied; c) a foil applied with a minimum overlap of 20 % and with a drain wire in direct contact with the metallic side of the foil. Metal braid wire diameters are given in Table B.1. Screening ov
48、er the cable core may also be in the form of a laminated sheath (moisture barrier as 4.10 or multi layer sheath as 4.18.2). 4.10 Moisture barriers When a moisture barrier is specified it shall be selected from those listed below. It shall be applied to meet the requirements of 4.10 of EN 50288-1: a)
49、 water swellable tapes; b) water swellable non-toxic powder; c) filling compound; d) laminated sheath, consisting of a longitudinal overlapped metallic foil, bonded within the overlapping and to the inner surface of an extruded sheath. The foil shall be one or both sides plastic coated, but in the case of only one side being coated a tinned copper drain wire shall be applied in direct contact with the metallic surface of the foil. The thickness of the metallic part of the foil shall be at least 0,15 mm
