1、BRITISH STANDARDBS EN 50290-2-26: 2002Incorporating amendment no. 1Communication cables Part 2-26: Common design rules and construction Halogen free flame retardant insulation compoundsThe European Standard EN 50290-2-26:2002, incorporating amendment A1:2007, has the status of a British StandardICS
2、29.035.20; 33.120g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 50290-2-26:2002This British Standard, having been prepared under the directio
3、n of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 15 April 2002 BSI 2007ISBN 978 0 580 59500 4National forewordThis British Standard is the UK implementation of EN 50290-2-26:2002, incorporating amendme
4、nt A1:2007. It supersedes BS 7878-6:1997 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee EPL/46, Cables, wires and waveguides, RF connectors and accessories for communication and signalling, to Subcommittee EPL/46/1, Communication cables. A list of or
5、ganizations represented on this subcommittee can be obtained on request to its secretary.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 cannot confer immunity from legal obl
6、igations.Amendments issued since publicationAmd. No. Date Comments17270 31 August 2007 Table 1 replacedEUROPEAN STANDARD EN 50290-2-26NORME EUROPENNEEUROPISCHE NORMJanuary 2002CENELECEuropean Committee for Electrotechnical StandardizationComit Europen de Normalisation ElectrotechniqueEuropisches Kom
7、itee fr Elektrotechnische NormungCentral Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.Ref. No. EN 50290-2-26:2002 EICS 29.035.20; 33.120.10 Supersedes HD 624.6 S1:1995English versionCo
8、mmunication cablesPart 2-26: Common design rules and construction Halogen free flame retardant insulation compoundsCbles de communicationPartie 2-26: Rgles de conceptioncommunes et construction Mlanges pour enveloppesisolantes sans halogne et avecpropagation retarde de flammeKommunikationskabelTeil
9、2-26: Gemeinsame Regelnfr Entwicklung und Konstruktion -Halogenfreie flammwidrigeIsoliermischungenThis European Standard was approved by CENELEC on 2001-11-01. CENELEC members are bound tocomply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving thisEuropean Standard
10、 the status of a national standard without any alteration.Up-to-date lists and bibliographical references concerning such national standards may be obtained onapplication to the Central Secretariat or to any CENELEC member.This European Standard exists in three official versions (English, French, Ge
11、rman). A version in anyother language made by translation under the responsibility of a CENELEC member into its ownlanguage and notified to the Central Secretariat has the same status as the official versions.CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Rep
12、ublic,Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.+A1June 2007EN 50290-2-26:2002 - 2 -ForewordThis European Standard was prepared by a joint working group of the Technical Committee
13、s CENELECTC 46X, Communication cables, and CENELEC TC 86A, Optical fibres and optical fibre cables.The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC asEN 50290-2-26 on 2001-11-01.This European Standard supersedes HD 624.6 S1:1995.The following dates w
14、ere fixed: latest date by which the EN has to be implementedat national level by publication of an identicalnational standard or by endorsement (dop) 2002-08-01 latest date by which the national standards conflictingwith the EN have to be withdrawn (dow) 2004-08-01Annexes designated “normative“ are
15、part of the body of the standard.In this standard, annexe A is normative.This European Standard has been prepared under the European Mandate M/212 given to CENELEC by theEuropean Commission and the European Free Trade Association._Foreword to amendment A1 This amendment to the European Standard EN 5
16、0290-2-26:2002 was prepared by a joint working group of the Technical Committee CENELEC TC 46X, Communication cables, and the Technical Committee CENELEC TC 86A, Optical fibres and optical fibre cables. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELE
17、C as amendment A1 to EN 50290-2-26:2002 on 2007-03-01. The following dates were fixed: latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2008-03-01 latest date by which the national standards conflictin
18、g with the amendment have to be withdrawn (dow) 2010-03-01 This amendment introduces a new halogen free insulation compound grade for high temperature. _- 3 - EN 50290-2-26:20021 ScopeThis Part 2-26 of EN 50290 gives specific requirements for halogen free flame retardant insulation compoundsused in
19、communication cables.It is to be read in conjunction with Part 2-20 of EN 50290.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications
20、are listed hereafter.For dated references, subsequent amendments to or revisions of any of these publications apply to thisEuropean Standard only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies (including amendments).E
21、N 60811-1-1:1995 Insulating and sheathing materials of electric and optical cables - Commontest methods - Part 1-1: General application - Measurement of thickness andoverall dimensions - Tests for determining the mechanical properties(IEC 60811-1-1:1993)EN 60811-1-2:1995 Insulating and sheathing mat
22、erials of electric cables - Common test methodsPart 1-2: General application - Thermal ageing methods(IEC 60811-1-2:1985 + corr. May 1986 + A1:1989)EN 60811-1-3:1995 Insulating and sheathing materials of electric and optical cables - Commontest methods - Part 1-3: General application - Methods for d
23、etermining thedensity - Water absorption tests - Shrinkage test (IEC 60811-1-3:1993)EN 60811-1-4:1995 Insulating and sheathing materials of electric and optical cables - Commontest methods - Part 1-4: General application - Tests at low temperature(IEC 60811-1-4:1985 + corr. May 1986 + A1:1993)EN 608
24、11-2-1:1998 Insulating and sheathing materials of electric and optical cables - Commontest methods - Part 2-1: Methods specific to elastomeric compounds - Ozoneresistance, hot set and mineral oil immersion tests (IEC 60811-2-1:1998)EN 60811-3-1:1995 Insulating and sheathing materials of electric and
25、 optical cables - Commontest methods - Part 3-1: Methods specific to PVC compounds - Pressure testat high temperature - Tests for resistance to cracking(IEC 60811-3-1:1985 + corr. May 1986)HD 405.3 S1:1993 Tests on electric cables under fire conditions - Part 3: Tests on bunched wiresor cables ( IEC
26、 60332-3:1992)IEC 60250:1969 Recommended methods for the determination of the permittivity and dielectricdissipation factor of electrical insulating materials at power, audio and radiofrequencies including metre wavelengthsIEC 60754-2:1991+ A1:1997Test on gases evolved during combustion of materials
27、 from cables -Determination of degree of acidity of gases by measuring pH and conductivity3 RequirementsIn case of specific applications, additional performances could be needed. Relevant test methods andrequirements shall be included in the detail specification of the cables.EN 50290-2-26:2002 - 4
28、-Table 1 Halogen free insulation compounds for flame retardant cables Characteristics Test method Unit Grades Cross linked insulation Thermoplastic insulation Thermoplastic insulation 1 Maximum rated temperature at cable for which the compound can be used C 90 70 90 2 Mechanical characteristics 2.1
29、2.11 2.12 In state of delivery Tensile strength - median, min. Elongation at break - median, min. EN 60811-1-1 9.1 MPa % 10 125 9 125 9 125 2.2 2.21 After ageing Ageing conditions - temperature - duration Tensile strength - variation, max. EN 60811-1-2 8.1 C h % 135 2 7 x 24 30 100 2 7 x 24 30 110 2
30、 7 x 24 30 2.22 Elongation at break - median, min. - variation, max. % % 30 100 a40 100 40 3 Heat shock Test conditions - temperature - duration Result to be obtained EN 60811-3-1 9.1 C h Not applicable Not applicable Not applicable 4 Behaviour at low temperature Bending at low temperatureTest condi
31、tions - temperature Result to be obtained EN 60811-1-4 8.1 C - 15 2 No crack - 15 2 No crack - 15 2 No crack 5 Shrinkage EN 60811-1-3 Clause 10 Test conditions - sample length - temperature - duration Result to be obtained, max. mm C h % 200 100 1 4 200 100 1 4 200 100 1 4 - 5 - EN 50290-2-26:2002Ta
32、ble 1 Halogen free insulation compounds for flame retardant cables (continued) Characteristics Test method Unit Grades Cross linkedinsulation Thermoplastic insulation Thermoplastic insulation 6 Pressure at high temperature Test conditions - temperature - duration (for all values of cable diameter) R
33、esult to be obtained - depth of indentation median, max EN 60811-3-1 8.1 C h % Not applicable 80 2 4 50 90 2 4 50 7 Oxygen Index (seenote 1) HD 405.3 % 8 Corrosivity IEC 60754-2 To meet To meet To meet 9 Smoke opacity (see note 2) 10 Toxicity Under consideration 11 Volume resistivity, min. - at maxi
34、mum rated temperature at cable - at 20 C Test conditions - sample length, min. - immersion duration Appended .m m h 108(provisional value)1010(provisional value) 5 2 108(provisional value)1010(provisional value) 5 2 108(provisional value) 1010(provisional value) 5 2 12 Dielectric constant (see note
35、3) IEC 60250 Typical value (under consideration) Typical value (under consideration) 13 Dissipation factor (see note 3) IEC 60250 Typical value (under consideration) Typical value (under consideration) 14 14.1 14.2 Hot set test Test conditions - temperature - duration - load Result to be obtained -
36、elongation, max. - permanent set, max. EN 60811-2-1 Clause 9 C min N/cm2% % 200 3 15 20 175 25 Not applicable Not applicable aProvisional value. NOTE 1 Oxygen index measurement has been found to be a suitable indicator to guide selection and monitoring of materials used in cables which have to meet
37、the fire performance tests specified in the relevant cable specification. NOTE 2 For selection of materials used in cables, IEC 60695-6 may be considered. NOTE 3 When required the dielectric constant and dissipation factor, shall be measured at 1 MHz, and at other required values. Typical values are
38、 under consideration. EN 50290-2-26:2002 - 6 -Annex A(normative)Volume resistivityThis test shall be made on insulated conductor sample.The sample shall be immersed in water previously heated to the specified temperature, a length of about0,25 m at each end of the sample being kept above the water.A
39、 D.C. voltage of between 80 V and 500 V shall be then applied between the conductor and the water.The insulation resistance shall be measured 1 min after application of the voltage.- The volume resistivity shall be calculated from the measured insulation resistance by the following formula:g114g112g
40、612RlogDdeg108whereg114 = volume resistivity, in g87 metersR = measured insulation resistance, in g87g108 = length of the sample, in metersD = outer diameter of the insulation, in mmd = inner diameter of the insulation, in mm.blankBS EN 50290-2-26: 2002BSI389 Chiswick High RoadLondonW4 4ALBSI Britis
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