BS EN 60695-8-1-2017 Fire hazard testing Heat release General guidance《火灾测试 热释放 通用指南》.pdf

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1、Fire hazard testingPart 8-1: Heat release General guidanceBS EN 60695-8-1:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN 60695-8-1:2017. It isidentical to IEC 60695-8-1:2016. It supersedes BS

2、EN 60695-8-1:2008 whichis withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/89, Fire hazard testing.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary

3、provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 89870 9ICS 13.220.40; 29.020Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard w

4、as published under the authority of theStandards Policy and Strategy Committee on 28 February 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60695-8-1:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60695-8-1 February 2017 ICS 13.220.40; 29.020 Su

5、persedes EN 60695-8-1:2008 English Version Fire hazard testing - Part 8-1: Heat release - General guidance (IEC 60695-8-1:2016) Essais relatifs aux risques du feu - Partie 8-1: Dgagement de chaleur - Guide gnral (IEC 60695-8-1:2016) Prfungen zur Beurteilung der Brandgefahr - Teil 8-1: Wrmefreisetzun

6、g - Allgemeiner Leitfaden (IEC 60695-8-1:2016) This European Standard was approved by CENELEC on 2016-12-20. 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 al

7、teration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other langua

8、ge made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the C

9、zech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

10、 United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation in any form and by any me

11、ans reserved worldwide for CENELEC Members. Ref. No. EN 60695-8-1:2017 E BS EN 60695-8-1:2017EN 60695-8-1:2017 2 European foreword The text of document 89/1342/FDIS, future edition 3 of IEC 60695-8-1, prepared by IEC/TC 89 “Fire hazard testing“ was submitted to the IEC-CENELEC parallel vote and appr

12、oved by CENELEC as EN 60695-8-1:2017. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-09-20 latest date by which the national standards conflicting with the document

13、 have to be withdrawn (dow) 2019-12-20 This document supersedes EN 60695-8-1:2008. 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 held responsible for identifying any or all such patent rights. End

14、orsement notice The text of the International Standard IEC 60695-8-1:2016 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60695-1-10 NOTE Harmonized as EN 60695-1

15、-10. IEC 60695-1-11 NOTE Harmonized as EN 60695-1-11. IEC 60695-1-12 NOTE Harmonized as EN 60695-1-12. ISO 1716 NOTE Harmonized as EN ISO 1716. IEC 60836:2015 NOTE Harmonized as EN 60836:2015. IEC 61099:2010 NOTE Harmonized as EN 61099:2010. IEC 60867:1993 NOTE Harmonized as EN 60867:1994. IEC 60296

16、:2012 NOTE Harmonized as EN 60296:2012. ISO 13927 NOTE Harmonized as EN ISO 13927. BS EN 60695-8-1:2017EN 60695-8-1:2017 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normativ

17、ely referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by com

18、mon modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60695-4 2012 Fire hazard testing - Part 4: Terminology conce

19、rning fire tests for electrotechnical products EN 60695-4 2012 IEC 60695-8-2 - Fire hazard testing - Part 8-2: Heat release - Summary and relevance of test methods FprEN 60695-8-2 - IEC Guide 104 - The preparation of safety publications and the use of basic safety publications and group safety publi

20、cations - - ISO 13943 2008 Fire safety - Vocabulary EN ISO 13943 2010 ISO/IEC Guide 51 - Safety aspects - Guidelines for their inclusion in standards - - BS EN 60695-8-1:2017 2 IEC 60695-8-1:2016 IEC 2016 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms and definitio

21、ns 7 4 Principles of determining heat release . 11 4.1 Complete combustion measured by the oxygen bomb calorimeter . 11 4.2 Incomplete combustion . 12 4.2.1 Measurement techniques . 12 4.2.2 Heat release by oxygen consumption . 12 4.2.3 Heat release by carbon dioxide generation 13 4.2.4 Heat release

22、 by increase of gas temperature . 13 5 Parameters used to report heat release data . 15 5.1 Heat of combustion (gross and net) 15 5.2 Heat release rate (HRR) . 15 5.3 Heat release (HR) . 16 5.4 Heat release rate per unit area (HRR*) . 16 5.5 Total heat release . 17 5.6 Peak heat release rate 17 5.7

23、Time to peak heat release rate 17 5.8 Effective heat of combustion . 17 5.8.1 Measurement and calculation 17 5.8.2 Examples. 18 5.9 FIGRA index . 19 5.10 ARHE and MARHE . 20 6 Considerations for the selection of test methods 22 6.1 Ignition sources 22 6.2 Type of test specimen . 22 6.3 Choice of con

24、ditions . 22 6.4 Test apparatus 22 6.4.1 General . 22 6.4.2 Small-scale fire test apparatus . 22 6.4.3 Intermediate and large-scale fire test apparatus 23 6.4.4 Comparison between small-scale and intermediate/large-scale fire test methods 23 6.5 Choice of fire tests 23 7 Relevance of heat release da

25、ta . 23 7.1 Contribution to fire hazard . 23 7.2 Secondary ignition and flame spread 23 7.3 Determination of self-propagating fire thresholds 24 7.4 Probability of reaching flash-over 24 7.5 Smoke and toxic gas production . 24 7.6 The role of heat release testing in research and development . 24 Bib

26、liography 25 BS EN 60695-8-1:2017IEC 60695-8-1:2016 IEC 2016 3 Figure 1 Heat release rate (HRR) curve . 16 Figure 2 Heat release (HR) curve . 16 Figure 3 Heat release rate per unit area (HRR*) curve . 17 Figure 4 Mass loss curve . 18 Figure 5 FIGRA curve derived from Figure 1 19 Figure 6 Illustrativ

27、e HRR curve 20 Figure 7 FIGRA curve derived from Figure 6 20 Figure 8 ARHE curve derived from Figure 1 . 21 Figure 9 ARHE curve derived from Figure 6 . 21 Table 1 Relationship between heat of combustion expressed in units of kJg1of fuel burned and kJg1of oxygen consumed for a variety of fuels 14 Tab

28、le 2 Relationship between heat of combustion expressed in units of kJg1of fuel burned and kJg1of oxygen consumed for a variety of insulating liquids 15 BS EN 60695-8-1:2017 4 IEC 60695-8-1:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIRE HAZARD TESTING Part 8-1: Heat release General gu

29、idance FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization

30、 in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entr

31、usted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the Intern

32、ational Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since e

33、ach technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of

34、IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in t

35、heir national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity asses

36、sment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, emplo

37、yees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the

38、 publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the p

39、ossibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60695-8-1 has been prepared by IEC technical committee 89: Fire hazard testing. This third edi

40、tion cancels and replaces the second edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) a modified Introduction; b) reference to IEC 60695-1-12; c) updated normative refe

41、rences; d) revised terms and definitions; e) new text in 4.2.2, 4.2.3, 6.1 and 6.4, including several mandatory statements; f) mandatory statements in a new Subclause 6.5. BS EN 60695-8-1:2017IEC 60695-8-1:2016 IEC 2016 5 The text of this standard is based on the following documents: FDIS Report on

42、voting 89/1342/FDIS 89/1348/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. It has the status of a basic safety publication in

43、accordance with IEC Guide 104 and ISO/IEC Guide 51. This standard is to be used in conjunction with IEC 60695-8-2. A list of all the parts in the IEC 60695 series, under the general title Fire hazard testing, can be found on the IEC website. IEC 60695-8 consists of the following parts: Part 8-1: Hea

44、t release General guidance Part 8-2: Heat release Summary of test methods The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this

45、 date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. BS EN 60695-8-1:2017 6 IEC 60695-8-1:2016 IEC 2016 INTRODUCTION In the design of any electrotechnical product, the risk of fire and the potential hazards associated with fire need to be considered. In t

46、his respect the objective of component, circuit and equipment design as well as the choice of materials is to reduce the risk of fire to a tolerable level even in the event of reasonably foreseeable (mis)use, malfunction or failure. IEC 60695-1-10 11provides guidance on how this is to be accomplishe

47、d. Fires involving electrotechnical products can be initiated from external non-electrical sources. Considerations of this nature are dealt with in an overall risk assessment. The aim of the IEC 60695 series of standards is to save lives and property by reducing the number of fires or reducing the c

48、onsequences of the fire. This can be accomplished by: trying to prevent ignition caused by an electrically energised component part and, in the event of ignition, to confine any resulting fire within the bounds of the enclosure of the electrotechnical product; trying to minimise flame spread beyond

49、the products enclosure and to minimise the harmful effects of fire effluents including heat, smoke, and toxic or corrosive combustion products. Fires are responsible for creating hazards to life and property as a result of the generation of heat (thermal hazard), toxic and/or corrosive compounds and obscuration of vision due to smoke. Fire risk increases as the heat released increases, possibly leading to a flash-over fire. One of the most important measurem