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1、BRITISH STANDARD BS EN50288-7:2005Multi-element metallic cables used in analogue and digital communication and control Part 7: Sectional specification for instrumentation and control cablesThe European Standard EN 50288-7:2005 has the status of aBritish StandardICS 33.120.10 BS EN 50288-7:2005Nation
2、al forewordThis British Standard is the official English language version ofEN 50288-7:2005.The UK participation in its preparation was entrusted to Technical Committee EPL/46, Cables, wires and waveguides, R.F. connectors and accessories for communication and signalling, which has the responsibilit
3、y to:aid enquirers to understand the text;present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed;monitor related international and European developments and promulgate them in the UK.A list of organizat
4、ions represented on this committee can be obtained on request to its secretary.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 Correspondenc
5、e Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself
6、confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 23 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amd. No.DateCommentsThis British Stan
7、dard was published under the authority of the Standards Policy and Strategy Committeeon 21 December 2005 BSI 21 December 2005ISBN 0 580 47283 3Amendments issued since publicationEUROPEAN STANDARD EN 50288-7 NORME EUROPENNE EUROPISCHE NORM September 2005 ICS 33.120.10 English version Multi-element me
8、tallic cables usedin analogue and digital communication and controlPart 7: Sectional specificationfor instrumentation and control cablesCbles mtalliques lments multiples utiliss pour les transmissions et les commandes analogiques et numriques Partie 7: Spcification intermdiaire pour les cbles dinstr
9、umentation et de contrle Mehradrige metallische Daten- und Kontrollkabel fr analoge und digitale bertragung Teil 7: Rahmenspezifikation fr Instrumenten- und Kontrollkabel This European Standard was approved by CENELEC on 2005-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal R
10、egulations 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 the Central Secretariat or to any CENELEC member.
11、 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 the same status as the official versions. CENELEC me
12、mbers are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switze
13、rland and United Kingdom. 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
14、and by any means reserved worldwide for CENELEC members. Ref. No. EN 50288-7:2005 E - 23 - EN 50288-7:2005 Foreword This European Standard was prepared by SC 46XC, Multicore, Multipair and Quad Data communication cables, of Technical Committee CENELEC TC 46X, Communication cables. The text of the dr
15、aft 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 EN has to be implemented at national level by publication of an identical n
16、ational standard or by endorsement (dop) 2006-04-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-04-01 Contents1 Scope.5 2 Normative references . 5 3 Definitions, symbols and abbreviations .6 4 Cable construction . 6 4.1 Conductor . 6 4.2 Insula
17、tion . 7 4.3 Cable elements . 7 4.4 Identification of cabling elements .8 4.5 Screening of cabling elements .8 4.6 Cable make-up . 8 4.7 Filling compound. 8 4.8 Interstitial fillers . 8 4.9 Screening of the cable core .8 4.10 Moisture barriers . 9 4.11 Protective wrappings. 9 4.12 Inner sheath.10 4.
18、13 Bedding layers . 10 4.14 Metallic protection .10 4.15 Integral suspension strand . 11 4.16 Outer sheathing . 11 4.17 Fauna protection . 11 4.18 Chemical and/or environmental protection . 11 4.18.1 Lead sheath . 12 4.18.2 Multi-layer sheath . 12 5 Test methods and requirements for completed cables
19、 . 12 5.1 Electrical tests. 13 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 concentricity - Selection of samples and evaluation of results.15 Annex B
20、 (normative) Copper braid screening .16 Annex C (normative) Determination of cable dimensions .17 Annex D (informative) Thermocouple extension and compensating conductors .22 Table 1 Minimum insulation thickness .7 Table B.1 Braid wire diameter. 16 Table C.1 Steps to determine fictitious cable diame
21、ter . 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 wire. 20 Table C.7 Tape armour . 20 Table C.8 Braid armour wire size. 21 Table D.1 Extension cables . 22 Table D.2 Compensating cables
22、. 22 1ScopeThis sectional specification covers multi-element cables suitable for connecting instruments and control systems for analogue or digital signal transmission. They may or may not be screened and optionally may incorporate armouring and/or moisture or environmental protection layers. The ca
23、bles shall have a mechanically robust construction and electrical transmission handling properties. The electrical, mechanical, transmission and environmental performance characteristics of the cables, related to their reference test methods are detailed. This sectional specification is to be read i
24、n 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, 300 V and 500 V a.c. These cables shall not be connected directly to mains electricity supply or other low impedance sources. Multi-el
25、ement 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 applicable local and national regulations. Cables intended to have limited circuit integrity in a fire are not covered by this specific
26、ation, but they are however under consideration for future editions. 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. 2Normativ
27、e referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Publication Year TitleEN 10218-1 EN 1
28、0244-2 - - Steel wire and wire products General Part 1: Test methods Steel wire and wire products Non-ferrous metallic coatings on steel wire Part 2: Zinc or zinc alloy coatings EN 10257-1 - Zinc or zinc alloy coated non-alloy steel wire for armouring either power cables or telecommunications cables
29、 Part 1: Land cables EN 50289 Series Communication cables - Specifications for test methods EN 50290 Series Communication cables EN 50307 - Lead and lead alloy sheath and sleeves of electric cables EN 60708 - Low-frequency cables with polyolefin insulation and moisture barrier EN 60811-1-1 - polyole
30、fin sheath (IEC 60708) Insulating and sheathing materials of electric and optical cables Common test methods Part 1-1: General 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
31、supplement: Guide to the dimensional limits of circular conductors (IEC 60228 + IEC 60228A, mod.) HD 446.3 S1 - Thermocouples - 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
32、sheath - Part 2: Cables in pairs, triples, quads and quintuples for inside installations 3Definitions, symbols and abbreviationsFor the purposes of this European Standard the definitions of EN 50288-1 apply in addition to the following: 3.1 foila metal tape laminated to a plastic tape 4Cable construction4.1ConductorExcept for thermocouple extension and compensating cables, with conductors as described in Annex D, conductors shall be solid, stranded or flexi
