1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50525-3-21:2011Electric cables Low voltage energy cables of rated voltages up to and including 450/750 V (U0/U) Part 3-21: Cables with special fire performance Flexible cab
2、les with halogen-free crosslinked insulation, and low emission of smokeBS EN 50525-3-21:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN50525-3-21:2011. It partially supersedes BS7919:2001.The UK participation in its preparation was entrusted to TechnicalCom
3、mittee GEL/20/17, Electric Cables - Low voltage.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978
4、0 580 64376 7ICS 29.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2011.Amendments issued since publicationDate Text affectedBS EN 50525-3-21:2
5、011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN50525-3-21:2011. It partially supersedes BS7919:2001.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/20/17, Electric Cables - Low voltage.A list of organizations represented on th
6、is committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 64376 7ICS 29.060.20Compliance with a British Standard cannot confer immunity froml
7、egal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2011.Amendments issued since publicationDate Text affectedThis British Standard is the UK implementation of EN 50525-3-21:2011. In the UK, the BS EN 50525 series of
8、standards nullontain nullomplenullsnullpersession details. The tanullle nullelonull nullest snullmmarinulles the relationship nulletnulleen these standards:Part 1 together with Supersedes2-null1 BS null3null-null:1nullnullnull2-null1, 2-null2 BS null00null: 200null2-11 nullin partnull, 2-12, 2-21 nu
9、llin partnull, 2-null1 BS null500:20002-11 nullin partnull, 2-21 nullin partnull, 2-51 nullin partnull, 2-null3, 3-21 BS nullnull1null:20012-31, 2-51 nullin partnull BS 6004:20003-null1 BS 7211:19982-22, 2-null2, 2-null2, 3-11, 3-31 NoneNOTE All British Standards will remain current until they are w
10、ithdrawn on 31 December 2012. British Standards in bold are only partially supersedednull and new editions onull BS null00null and BS null211 will be introduced on 1 nullanuary 2013.National nullnnenull Nnull nullinformatinullenull nullinulles information on the orinullins and identinullnullation of
11、 partinullnulllar nullanullle tnullpes.BS EN 50525-3-21:2011EUROPEAN STANDARD EN 50525-3-21 NORME EUROPENNE EUROPISCHE NORM May 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Manage
12、ment Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50525-3-21:2011 E ICS 29.060.20 Supersedes HD 22.13 S2:2007English version Electric cables - Low voltage energy cables of rated
13、voltages up to and including 450/750 V (U0/U) - Part 3-21: Cables with special fire performance - Flexible cables with halogen-free crosslinked insulation, and low emission of smoke Cbles lectriques - Cbles dnergie basse tension de tension assigne au plus gale 450/750 V (U0/U) - Partie 3-21: Cbles p
14、erformances spciales au feu - Cbles souples isols en matriau lastomre rticul sans halogne, faible dgagement de fume Kabel und Leitungen - Starkstromleitungen mit Nennspannungen bis 450/750 V (U0/U) - Teil 3-21: Starkstromleitungen mit verbessertem Verhalten im Brandfall - Flexible halogenfreie, rauc
15、harme Leitungen mit vernetzter Isolierung This European Standard was approved by CENELEC on 2011-01-17. 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 alterat
16、ion. 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. This European Standard exists in three official versions (English, French, German). A version in any other language made by tran
17、slation 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 members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, E
18、stonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 50525-3-21:2011EN 50525-3-21:2011 - 2 - Foreword This Eur
19、opean Standard was prepared by the Technical Committee CENELEC TC 20, Electric cables. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50525-3-21 on 2011-01-17. This document, which is one of a multipart series, supersedes HD 22.13 S2:2007. Attention is drawn
20、 to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publ
21、ication of an identical national standard or by endorsement (dop) 2012-01-17 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-01-17 _ BS EN 50525-3-21:2011- 3 - EN 50525-3-21:2011 Contents Page 1 Scope 42 Normative references . 43 Terms and definiti
22、ons . 54 Heat resistant cables (90 C) . 54.1 Heavy duty cables H07ZZ-F . 54.2 Heavy duty multicore cables H07ZZ-F 6Annex A (normative) Tests for cables to EN 50525-3-21 8Annex B (normative) General data . 9Annex C (normative) Requirements for compatibility test . 13C.1 Test conditions . 13C.2 Requir
23、ements . 13Bibliography . 14Tables Table A.1 8Table B.1 9Table B.2 12Table C.1 Requirements 13BS EN 50525-3-21:2011EN 50525-3-21:2011 - 4 - 1 Scope EN 50525-3-21 applies to flexible cables, insulated and sheathed with halogen-free crosslinked compound and having low emission of smoke and corrosive g
24、ases when exposed to fire. NOTE 1 Low emission of smoke is checked in accordance with EN 61034-2. Low emission of corrosive gases is checked as part of the check for absence of halogens (see Annex B of EN 50525-1). The cables are of rated voltage U0/U 450/750 V. The cables are intended for the conne
25、ction of equipment and machinery to the fixed supply. The maximum conductor operating temperature for each of the cables in this standard is 90 C. NOTE 2 HD 516 contains extensive guidance on the safe use of cables in this standard. This EN 50525-3-21 should be read in conjunction with EN 50525-1, w
26、hich specifies general requirements. 2 Normative references The 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
27、) applies. NOTE One or more references to the standards below are in respect of a specific sub-division of that standard, for instance a clause, a table, a class or a type. Cross-references to these standards are undated and, at all times, the latest version applies. EN 50363-5 Insulating, sheathing
28、 and covering materials for low voltage energy cables - Part 5: Halogen-free, cross-linked insulating compounds EN 50363-6 Insulating, sheathing and covering materials for low voltage energy cables - Part 6: Halogen-free, cross-linked sheathing compounds EN 50395 Electrical test methods for low volt
29、age energy cables EN 50396 Non electrical test methods for low voltage energy cables EN 50525-1 Electric cables - Low voltage energy cables of rated voltages up to and including 450/750 V (U0/U) - Part 1: General requirements EN 60228 Conductors of insulated cables (IEC 60228) EN 60332-1-2 Tests on
30、electric and optical fibre cables under fire conditions - Part 1-2: Test for vertical flame propagation for a single insulated wire or cable - Procedure for 1 kW pre-mixed flame (IEC 60332-1-2) EN 60332-3-24 Tests on electric and optical fibre cables under fire conditions Part 3-24: Test for vertica
31、l flame spread of vertically-mounted bunched wires or cables - Category C (IEC 60332-3-24) EN 60811-1-2 Insulating and sheathing materials of electric and optical cables - Common test methods - Part 1-2: General application - Thermal ageing methods (IEC 60811-1-2) EN 60811-1-4 Insulating and sheathi
32、ng materials of electric and optical cables - Common test methods - Part 1-4: General application - Tests at low temperature (IEC 60811-1-4) EN 61034-2 Measurement of smoke density of cables burning under defined conditions - Part 2: Test procedure and requirements (IEC 61034-2) BS EN 50525-3-21:201
33、1- 5 - EN 50525-3-21:2011 3 Terms and definitions For the purposes of this document the terms and definitions given in Clause 3 of EN 50525-1 apply. 4 Heat resistant cables (90 C) 4.1 Heavy duty cables H07ZZ-F 4.1.1 Construction 4.1.1.1 Conductor The conductor shall be class 5, according to EN 60228
34、. 4.1.1.2 Sizes of cable The sizes of cable shall be: - single core 1,5 mm2to 630 mm2; - 2 and 5 core 1,0 mm2to 25 mm2; - 3 and 4 core 1,0 mm2to 300 mm2.4.1.1.3 Insulation The insulation shall be a cross-linked compound, Type EI 8 to EN 50363-5, applied around each conductor. 4.1.1.4 Assembly The co
35、res of cables having two to five cores shall be twisted together. NOTE 1 A centre filler may be used. NOTE 2 A tape may be applied around the core assembly before application of the sheath. 4.1.1.5 Sheath The cores shall be covered with a sheath. a) For cables with a specified sheath thickness up to
36、 and including 2,4 mm: 1) sheath in a single layer, cross-linked compound of type EM 8 to EN 50363-6. b) For cables with a specified sheath thickness greater than 2,4 mm: 1) sheath either in a single layer, cross-linked compound of type EM 8 to EN 50363-6; 2) or in two layers, with the inner layer m
37、ade of one of the cross-linked compounds type EM 8 or EM 10 to EN 50363-6 and the outer layer of the cross-linked compound type EM 8 to EN 50363-6. The sheath applied in a single layer or the inner layer of the sheath in two layers shall, for cables with two to five cores, fill the spaces between th
38、e cores. Where a tape of suitable BS EN 50525-3-21:2011EN 50525-3-21:2011 - 6 - material is applied around the core assembly (see NOTE 2 to 4.1.1.4) this requirement shall not apply, provided that the finished cables shall not have any substantial cavity in the outer interstices between the cores. 4
39、.1.1.6 Marking The cable shall be marked with the CENELEC code H07ZZ-F. The marking shall comply with Clause 6 of EN 50525-1. 4.1.2 Requirements Each cable shall comply with the appropriate requirements given in EN 50525-1, and the particular requirements of this Part. Testing shall be in accordance
40、 with Annex A. The dimensions of the cables shall conform to Table B.1 for the relevant size. The requirements to be met for the compatibility test shall be as given in Annex C. When tested in accordance with the method and procedure given in EN 61034-2, all sizes of cable shall exceed 60 % light tr
41、ansmittance throughout the test. 4.2 Heavy duty multicore cables H07ZZ-F 4.2.1 Construction 4.2.1.1 Conductor The conductor shall be class 5, according to EN 60228. 4.2.1.2 Sizes of cable The sizes of cable shall be: - 6, 7, 12, 18, 24 and 36 core 1,5 mm2and 2,5 mm2; - 6, 7, 12 and 18 core 4 mm2. NO
42、TE The number of cores is preferred. Other numbers of cores, between the minimum and maximum for each conductor size, are permitted. See also footnote c to Table B.2. 4.2.1.3 Insulation The insulation shall be a cross-linked compound, Type EI 8 to EN 50363-5, applied around each conductor. The ident
43、ification of each core shall be in accordance with Annex D of EN 50525-1. 4.2.1.4 Assembly The cores shall be twisted together. A single core in the centre is not permitted. A protective conductor, if any, shall be applied in the outer layer. A centre filler shall be used for cables having 6, 7, 18,
44、 and 36 cores, and also for 19 cores when this non-preferred size is used. NOTE 1 A centre filler may be used for other sizes. NOTE 2 A tape may be applied around the core assembly before application of the sheath. BS EN 50525-3-21:2011- 7 - EN 50525-3-21:2011 4.2.1.5 Sheath The cores shall be cover
45、ed with a sheath. The sheath shall be made up as follows: a) For cables with a specified sheath thickness up to and including 2,4 mm: 1) sheath in a single layer, cross-linked compound type EM 8 to EN 50363-6. b) For cables with a specified sheath thickness greater than 2,4 mm: 1) either in a single
46、 layer, cross-linked compound type EM 8 to EN 50363-6; 2) or in two layers, with the inner layer made of one of the cross-linked compounds type EM 8 or EM 10 to EN 50363-6 and the outer layer of the cross-linked compound type EM 8 to EN 50363-6. The sheath in a single layer or the inner layer of the
47、 sheath in two layers shall fill the spaces between the cores. Where a tape of suitable material is applied around the core assembly (see NOTE 2 to 4.2.1.4) this requirement shall not apply, provided that the finished cables shall not have any substantial cavity in the outer interstices between the
48、cores. 4.2.1.6 Marking The cable shall be marked with the CENELEC code H07ZZ-F. The marking shall comply with Clause 6 of EN 50525-1. 4.2.2 Requirements Each cable shall comply with the appropriate requirements given in EN 50525-1, and the particular requirements of this Part. Testing shall be in ac
49、cordance with Annex A. The dimensions of the cables shall conform to Table B.2 for the relevant size. The requirements to be met for the compatibility test shall be as given in Annex C. When tested in accordance with the method and procedure given in EN 61034-2, all sizes of cable shall exceed 60 % light transmittance throughout the test. BS EN 50525-3-21:2011EN 50525-3-21:2011 - 8 - Annex A (normative) Tests for cables to EN 50525-3-21 Table A.1 1 2 3 4 5 Ref No. Test
