EN 50399-2011 en Common test methods for cables under fire conditions - Heat release and smoke production measurement on cables during flame spread test - Test apparatus procedures.pdf

1、BS EN 50399:2011+A1:2016Common test methods for cables under fire conditions Heat release and smoke production measurement on cables during flame spread test Test apparatus, procedures, resultsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 50399:2011+A1:2016 B

2、RITISH STANDARDNational forewordThis British Standard is the UK implementation of The UK participation in its preparation was entrusted by TechnicalCommittee GEL/20, Electric cables, to Subcommittee GEL/20/18, A list of organizations represented on this subcommittee can be obtained on request to its

3、 secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.ISBN 978 0 580 91574 1 ICS 13.220.40; 29.060.20 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard

4、 was published under the authority of the Standards Policy and Strategy Committee on 31 May 2011.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e d The British Standards Institution 2016. Published by BSI Standards Limited 201631 July 2016 Implementation of CEN amendment A1:2

5、016Electric Cables - Fire testing.EN 50399:2011+A1:2016. It supersedes BS EN 50399:2011 which The start and finish of text introduced or altered by amendment is !“indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CE

6、N amendment A1 is indicated by .will be withdrawn on 18 April 2019.EUROPEAN STANDARD EN 50399:2011+A1 NORME EUROPENNE EUROPISCHE NORM CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Manag

7、ement 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 50399:2011 E ICS 13.220.40; 29.060.20 English version Common test methods for cables under fire conditions - Heat release and s

8、moke production measurement on cables during flame spread test - Test apparatus, procedures, results Mthodes dessai communes aux cbles soumis au feu - Mesure de la chaleur et de la fume dgages par les cbles au cours de lessai de propagation de la flamme - Appareillage dessai, procdure et rsultats Al

9、lgemeine Prfverfahren fr das Verhalten von Kabeln und isolierten Leitungen im Brandfall - Messung der Wrmefreisetzung und Raucherzeugung whrend der Prfung der Flammenausbreitung - Prfeinrichtung, Prfverfahren und Prfergebnis This European Standard was approved by CENELEC on 2011-02-28. CENELEC membe

10、rs 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 on applicatio

11、n 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 Secretariat ha

12、s the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

13、 Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. June 2016 Foreword This European 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 app

14、roved by CENELEC as EN 50399 on 2011-02-28. 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 endorsement (dop) 2012-02-28 latest date by which the national standards conflicting with the EN have

15、 to be withdrawn (dow) 2014-02-28 _ Foreword to amendment A1This document (EN 50399:2011/A1:2016) has been prepared by CLC/TC 20 “Electric cables”. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standa

16、rd or by endorsement (dop) 2017-04-18 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2019-04-18 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be

17、 held responsible for identifying any or all such patent rights. BS EN 50399:2011+A1:2016 EN 50399:2011+A1:2016 (E) 2 Contents Introduction . 51 Scope 72 Normative references 73 Terms and definitions . 74 Test apparatus . 84.1 General 84.2 Air input . 94.3 Hood 94.4 Exhaust duct 104.5 Instrumentatio

18、n in the exhaust duct 104.6 Extracting ventilator . 114.7 Smoke production measuring equipment . 114.8 Combustion gas analysis equipment 125 Qualification of test apparatus . 125.1 General 125.2 Flow distribution measurements . 125.3 Sampling delay time measurement . 135.4 Commissioning calibrations

19、 135.5 Routine calibration . 136 Test procedure. 146.1 Initial test conditions 146.2 Test sample . 146.3 Sample conditioning 146.4 Determination of the number of test pieces 156.5 Mounting of the test sample 166.6 Exhaust volume flow . 186.7 Ignition source . 186.8 Flame application time 186.9 Testi

20、ng operations . 196.10 Observations and measurements during the test . 197 Determination of parameters derived from the test . 207.1 Calculation of HRR and SPR parameters . 207.2 Determination of extent of flame spread (FS) 208 Test report 218.1 General 218.2 Contents 21Annex A (normative) Calculati

21、on of heat release . 32A.1 Volume flow . 32A.2 Generated heat effect . 32A.3 Calculation of the mole fraction of water vapour in the air 34Annex B (normative) Smoke production . 35Annex C (informative) Additional information on Reynolds number in Figure 5 36BS EN 50399:2011+A1:2016 EN 50399:2011+A1:

22、2016 (E) 3 Annex D (normative) Flow distribution inside the duct . 37D.1 General 37D.2 Velocity profile factor kc. 37Annex E (normative) Commissioning calibrations 40E.1 General procedures for separate pieces of equipment . 40E.2 Gas analyser calibrations 40E.3 HRR calibrations 4 E.4 Smoke measureme

23、nt system calibration 45Annex F (informative) Guidance for calibration procedures for specific measuring equipment 48F.1 General procedures for separate pieces of equipment . 48F.2 Gas analyser calibrations 48F.3 Check of propane mass flow controller or rotameter 48F.4 Optical filter check for white

24、 light systems 49Annex G (normative) Calculation of HRRav, SPRavand FIGRA . 50G.1 Calculation of HRRav50G.2 Calculation of SPRav. 51G.3 Calculation of the Fire Growth Rate Index (FIGRA) 51Annex H (informative) Guidance on the choice of test equipment . 52Annex I (informative) Guidance on the file fo

25、rmat for data from the test 53Bibliography 58Figures Figure 1 General arrangement of test apparatus . 23Figure 2 Schematic of a hood 24Figure 3 Typical guide vanes . 25Figure 4 Bidirectional probe . 26Figure 5 Probe response versus Reynolds number . 27Figure 6 Sampling probe 28Figure 7 Schematic dia

26、gram of sampling line 29Figure 8 Optical system General arrangement . 30Figure 10 Mounting arrangement for Class B1 31caFigure D.1 Section of the exhaust duct Positions for measurement of the gas velocity . 38Figure E.1 Overview of commissioning calibrations. 47Tables Table 1 Mounting as a function

27、of cable diameter . 17Table E.1 Burner ignition times and HRR levels . 42Table E.2 Example of determination of commissioning ktfactor 44Table I.1 - Example of the recommended raw data file format . 54BS EN 50399:2011+A1:2016 EN 50399:2011+A1:2016 (E) 4 1Annex Rounding of numbers 57J (normative) Figu

28、re 9 Mounting of bundles (not on scale, only one of 15 bundles) . 30Introduction EN 50399 specifies the test apparatus and test procedures for the assessment of the reaction to fire performance of cables to enable classification under the Construction Products Directive 1 to be achieved. The test me

29、thod describes an intermediate scale fire test of multiple cables mounted on a vertical cable ladder and is carried out with a specified ignition source to evaluate the burning behaviour of such cables and enable a direct declaration of performance. The test provides data for the early stages of a c

30、able fire from ignition of cables. It addresses the hazard of propagation of flames along the cable, the potential, by the measurement of the heat release rate, for the fire to affect areas adjacent to the compartment of origin, and the hazard, by the measurement of production of light obstructing s

31、moke, of reduced visibility in the room of origin and surrounding enclosures. The following parameters may be determined under defined conditions during the test: a) flame spread; b) heat release rate; c) total heat release; d) smoke production rate; e) total smoke production; f) fire growth rate in

32、dex; g) occurrence of flaming droplets/particles . The apparatus is based upon that of EN 60332-3-10 but with additional instrumentation to measure heat release and smoke production during the test. It has been demonstrated 3 that the utilisation of these additional measurement techniques, proven fo

33、r other standard tests, e.g. for building products, are appropriate for assessing the reaction to fire performance of electric cables. These techniques include heat release and smoke production measurements. Compared with existing test methods described in EN 60332-3-10, they enable a more comprehen

34、sive assessment system, which is both more precise and sensitive, and enables a wider range of fire performance levels. Care should be exercised in relating the parameters measured to different safety levels in actual cable installations as the actual installed configuration of the cables may be a m

35、ajor determinant in the level of flame spread, heat release and smoke production occurring in an actual fire. These parameters depend upon a number of features, such as a) the volume of combustible material exposed to the fire and to any flaming or heat which may be produced by the combustion of the

36、 cables; b) the geometrical configuration of the cables and their relationship to an enclosure; c) the temperature at which it is possible to ignite the gases emitted from the cables; d) the quantity of combustible gas released from the cables for a given temperature rise; e) the volume of air passi

37、ng through the cable installation; f) the construction of the cable, e.g. armoured or unarmoured, multi or single core. All of the foregoing assumes that the cables are able to be ignited when involved in an external fire. BS EN 50399:2011+A1:2016 EN 50399:2011+A1:2016 (E) 5 The conditions of cable

38、mounting, including volume of material exposed and geometrical configuration of the cables on the test ladder, and volume of airflow through the chamber have been chosen to be in accordance with that required by the Commission Decision 2006/751/EC 2. CENELEC has not been involved in the definition o

39、f these parameters. These standardised conditions provide the basis for classification but do not necessarily correspond to conditions found in a particular cable installation. NOTE Further information on the use of standardised conditions for classification with respect to product end-use applicati

40、on may be found in European Commission Guidance Paper G 4. EN 50399 gives details of the apparatus to be used in conjunction with the equipment described in EN 60332-3-10 in order to carry out the measurement of heat release and smoke production during the test. Details of the test procedures are al

41、so given. BS EN 50399:2011+A1:2016 EN 50399:2011+A1:2016 (E) 6 1 Scope EN 50399 specifies the apparatus and methods of test for the assessment of vertical flame spread, heat release, smoke production and occurrence of flaming droplets/particles of vertically-mounted bunched wires or cables, electric

42、al or optical, under defined conditions. NOTE For the purpose of this standard the term “electric wire or cable“ covers all insulated metallic conductor cables used for the conveyance of energy or signals. EN 50399 details the apparatus and the arrangement and calibration of the instrumentation to b

43、e installed in order to measure the heat release and the smoke production during the test. The combustion gases are collected in a hood above the test chamber and conveyed through an exhaust system, which allows the measurement of heat release rate and smoke production. Test procedures to be used fo

44、r type approval testing for classification of cables in Euroclasses B1ca, B2ca, Ccaand Dcaare given. Cable installation on the test ladder and the volume of air passing through the chamber are in accordance with the Commission Decision 2006/751/EC 2 which is reflected in the requirements of this sta

45、ndard. The apparatus described in this standard shall be used in conjunction with that described in EN 60332-3-10. 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 refer

46、ences, the latest edition of the referenced document (including any amendments) applies. EN 60584-1, Thermocouples Part 1: Reference tables (IEC 60584-1) EN ISO 13943:2010, -Fire safety Vocabulary (ISO 13943:2008) ISO 3966, Measurement of fluid flow in closed conduits Velocity area method using Pito

47、t static tubes 3 Terms and definitions For the purpose of this document, the terms and definitions given in EN ISO 13943:2010 and the following apply. 3.1 heat release rate HRR thermal energy released per unit time by an item during combustion under specified conditions 3.2 total heat release THR in

48、tegrated value of the heat release rate over a defined period 3.3 smoke production rate SPR smoke production per unit time EN 60332-3-10:2009, Tests on electric and optical fibre cables under fire conditions Part 3-10: Test for vertical flame spread of vertically-mounted bunched wires or cables Apparatus (IEC 60332-3-10:2000)!“BS EN 50399:2011+A1:2016 EN 50399:2011+A1:2016 (E) 7 3.4 total smoke production TSP integrated value of the smoke production rate over a defined period 3.5 flame spread FS propagation of