1、BRITISH STANDARD BS EN 50290-2-26: 2002 Incorporating amendment no. 1 Communication cables Part 2-26: Common design rules and construction Halogen free flame retardant insulation compounds The European Standard EN 50290-2-26:2002, incorporating amendment A1:2007, has the status of a British Standard
2、 ICS 29.035.20; 33.120 BS EN 50290-2-26:2002 This British Standard, having been prepared under the direction 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 2007 ISBN 978 0 580 59500 4
3、 National foreword This British Standard is the UK implementation of EN 50290-2-26:2002, incorporating amendment 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 It supersedes BS 7878-6:1997 which is withdrawn.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
4、and accessories for communication and signalling, to Subcommittee EPL/46/1, Communication cables. A list of organizations 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 r
5、esponsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. Date Comments 17270 31 August 2007 Table 1 replacedEUROPEAN STANDARD EN 50290-2-26 NORME EUROPENNE EUROPISCHE NORM January 2002 CENEL
6、EC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved world
7、wide for CENELEC members. Ref. No. EN 50290-2-26:2002 E ICS 29.035.20; 33.120.10 Supersedes HD 624.6 S1:1995 English version Communication cables Part 2-26: Common design rules and construction Halogen free flame retardant insulation compounds Cbles de communication Partie 2-26: Rgles de conception
8、communes et construction Mlanges pour enveloppes isolantes sans halogne et avec propagation retarde de flamme Kommunikationskabel Teil 2-26: Gemeinsame Regeln fr Entwicklung und Konstruktion - Halogenfreie flammwidrige Isoliermischungen This European Standard was approved by CENELEC on 2001-11-01. C
9、ENELEC 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 bibliographical references concerning such national standards may be obtained o
10、n 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 CENELEC member into its own language and notified to the Central Se
11、cretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland a
12、nd United Kingdom. +A1 June 2007EN 50290-2-26:2002 - 2 - Foreword This European Standard was prepared by a joint working group of the Technical Committees CENELEC TC 46X, Communication cables, and CENELEC TC 86A, Optical fibres and optical fibre cables. The text of the draft was submitted to the Uni
13、que Acceptance Procedure and was approved by CENELEC as EN 50290-2-26 on 2001-11-01. This European Standard supersedes HD 624.6 S1:1995. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsem
14、ent (dop) 2002-08-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2004-08-01 Annexes designated “normative“ are part of the body of the standard. In this standard, annexe A is normative. This European Standard has been prepared under the European Man
15、date M/212 given to CENELEC by the European Commission and the European Free Trade Association. _ Foreword to amendment A1 This amendment to the European Standard EN 50290-2-26:2002 was prepared by a joint working group of the Technical Committee CENELEC TC 46X, Communication cables, and the Technic
16、al 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 CENELEC 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 i
17、mplemented at national level by publication of an identical national standard or by endorsement (dop) 2008-03-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2010-03-01 This amendment introduces a new halogen free insulation compound grade for
18、 high temperature. _- 3 - EN 50290-2-26:2002 1 Scope This Part 2-26 of EN 50290 gives specific requirements for halogen free flame retardant insulation compounds used in communication cables. It is to be read in conjunction with Part 2-20 of EN 50290. 2 Normative references This European Standard in
19、corporates 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 listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this E
20、uropean 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 60811-1-1:1995 Insulating and sheathing materials of electric and optical cables - Common test methods - Part 1-1: Gener
21、al application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties (IEC 60811-1-1:1993) EN 60811-1-2:1995 Insulating and sheathing materials of electric cables - Common test methods Part 1-2: General application - Thermal ageing methods (IEC 60811-1-2:
22、1985 + corr. May 1986 + A1:1989) EN 60811-1-3:1995 Insulating and sheathing materials of electric and optical cables - Common test methods - Part 1-3: General application - Methods for determining the density - Water absorption tests - Shrinkage test (IEC 60811-1-3:1993) EN 60811-1-4:1995 Insulating
23、 and sheathing materials of electric and optical cables - Common test methods - Part 1-4: General application - Tests at low temperature (IEC 60811-1-4:1985 + corr. May 1986 + A1:1993) EN 60811-2-1:1998 Insulating and sheathing materials of electric and optical cables - Common test methods - Part 2-
24、1: Methods specific to elastomeric compounds - Ozone resistance, hot set and mineral oil immersion tests (IEC 60811-2-1:1998) EN 60811-3-1:1995 Insulating and sheathing materials of electric and optical cables - Common test methods - Part 3-1: Methods specific to PVC compounds - Pressure test at hig
25、h 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 wires or cables ( IEC 60332-3:1992) IEC 60250:1969 Recommended methods for the determination of the permittivity and diele
26、ctric dissipation factor of electrical insulating materials at power, audio and radio frequencies including metre wavelengths IEC 60754-2:1991 + A1:1997 Test on gases evolved during combustion of materials from cables - Determination of degree of acidity of gases by measuring pH and conductivity 3 R
27、equirements In case of specific applications, additional performances could be needed. Relevant test methods and requirements shall be included in the detail specification of the cables.EN 50290-2-26:2002 - 4 - Table 1 Halogen free insulation compounds for flame retardant cables Characteristics Test
28、 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 2.11 2.12 In state of delivery Tensile strength - median, min. Elongation at break - media
29、n, 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 7 x 24 30 2.22 Elongation at break - median, min. - variation, max. % % 30 100 a40 100 40
30、 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 conditions - temperature Result to be obtained EN 60811-1-4 8.1 C - 15 2 No crack - 15 2 No cra
31、ck - 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 50290-2-26:2002 Table 1 Halogen free insulation compounds for flame retardant cables (continued) Characteri
32、stics Test method Unit Grades Cross linked insulation Thermoplastic insulation Thermoplastic insulation 6 Pressure at high temperature Test conditions - temperature - duration (for all values of cable diameter) Result to be obtained - depth of indentation median, max EN 60811-3-1 8.1 C h % Not appli
33、cable 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 maximum rated temperature at cable - at 20 C Test conditions - sample length, min. - immersi
34、on duration Appended .m m h 10 8(provisional value)10 10(provisional value) 5 2 10 8(provisional value)10 10(provisional value) 5 2 10 8(provisional value) 10 10(provisional value) 5 2 12 Dielectric constant (see note 3) IEC 60250 Typical value (under consideration) Typical value (under consideratio
35、n) 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 - elongation, max. - permanent set, max. EN 60811-2-1 Clause 9 C min N/cm 2% % 200 3
36、 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 the fire performance tests specified in the relevant cable specification. NOTE 2
37、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 under consideration. EN 50290-2-26:2002 - 6 - Annex A (normative) Volume resisti
38、vity This test shall be made on insulated conductor sample. The sample shall be immersed in water previously heated to the specified temperature, a length of about 0,25 m at each end of the sample being kept above the water. A D.C. voltage of between 80 V and 500 V shall be then applied between the
39、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: 2R log D d e where = volume resistivity, in meters R = measured insulation resis
40、tance, in = length of the sample, in meters D = outer diameter of the insulation, in mm d = inner diameter of the insulation, in mm. blankBS EN 50290-2-26: 2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing B
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