1、 IEC 60695-8-2 Edition 1.0 2016-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Fire hazard testing Part 8-2: Heat release Summary and relevance of test methods Essais relatifs aux risques du feu Partie 8-2: Dgagement de chaleur Rsum et pertinence des mthodes dessais IEC 60695-8-2:2016-11(en-fr) BASI
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19、ebstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60695-8-2 Edition 1.0 2016-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Fire hazard testing Part 8-2: Heat release Summary and relevance of test methods
20、 Essais relatifs aux risques du feu Partie 8-2: Dgagement de chaleur Rsum et pertinence des mthodes dessais INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 13.220.40; 29.020 ISBN 978-2-8322-3750-2 BASIC SAFETY PUBLICATION PUBLICATION FONDAMENTALE DE SCURIT Re
21、gistered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distr
22、ibuteur agr. 2 IEC 60695-8-2:2016 IEC 2016 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 7 4 Summary of test methods 11 4.1 General . 11 4.2 Measurement of complete combustion 11 4.2.1 The bomb calorimeter 11 4.2.2 Purpose and principle 11 4.2.3 Te
23、st specimen . 11 4.2.4 Test procedure 11 4.2.5 Repeatability and reproducibility 12 4.2.6 Relevance of test data . 12 4.3 Measurements of incomplete combustion 12 4.3.1 Cone calorimeter . 12 4.3.2 Microscale calorimetry . 13 4.3.3 The Ohio State University calorimeter 14 4.3.4 Fire propagation appar
24、atus (ISO 12136) 15 4.3.5 Single Burning Item (SBI) test 16 4.3.6 Vertical cable ladder tests . 17 4.3.7 Horizontal cable ladder test . 20 4.3.8 Open calorimetry fire tests . 22 5 Overview of test methods 22 Bibliography 24 Table 1 Summary and comparison of vertical cable ladder tests 20 Table 2 Ove
25、rview of heat release test methods 22 IEC 60695-8-2:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIRE HAZARD TESTING Part 8-2: Heat release Summary and relevance of test methods FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardiza
26、tion comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes Internati
27、onal Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in
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32、l 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 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services car
33、ried 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, employees, servants or agents including individual experts and members of its technical committees and IEC National Co
34、mmittees 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 publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn
35、 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 possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not b
36、e held responsible for identifying any or all such patent rights. International Standard IEC 60695-8-2 has been prepared by IEC technical committee 89: Fire hazard testing. This first edition cancels and replaces IEC TR 60695-8-2 published in 2008. This edition constitutes a technical revision. The
37、text of this International Standard is based on the following documents: FDIS Report on voting 89/1343/FDIS 89/1349/RVD Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above table. This document has been drafted in
38、accordance with the ISO/IEC Directives, Part 2. 4 IEC 60695-8-2:2016 IEC 2016 It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51. A list of all the parts in the IEC 60695 series, under the general title Fire hazard testing, can be found on the IEC w
39、ebsite. This International Standard is to be used in conjunction with IEC 60695-8-1. IEC 60695-8 consists of the following parts: Part 8-1: Heat release General guidance Part 8-2: Heat release Summary and relevance of test methods The committee has decided that the contents of this document will rem
40、ain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IEC 60695-8-2:2016 IEC 2016 5 INTRODUCTION In the desi
41、gn of an electrotechnical product, the risk of fire and the potential hazards associated with fire need to be considered. In this 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
42、 of reasonably foreseeable (mis)use, malfunction or failure. IEC 60695-1-10, IEC 60695-1-11, and IEC 60695-1-12 provide guidance on how this is to be accomplished. Fires involving electrotechnical products can also be initiated from external non-electrical sources. Considerations of this nature are
43、dealt with in an overall fire hazard 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 consequences of the fire. This can be accomplished by: trying to prevent ignition caused by an electrically energised component
44、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 the products enclosure and to minimise the harmful effects of fire effluents including heat, smoke, and toxic or corrosive comb
45、ustion 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. The severity of a fire increases as the heat released increases, possibly leading to a fla
46、shover fire. One of the most important measurements in fire testing is the measurement of heat release and it is used as an important factor in the determination of fire hazard; it is also used as one of the parameters in fire safety engineering calculations. The measurement and use of heat release
47、data, together with other fire test data, can be used to reduce the likelihood of (or the effects of) fire, even in the event of foreseeable abnormal use, malfunction or failure of electrotechnical products. When a material is heated by some external source, fire effluent can be generated and can fo
48、rm a mixture with air that can ignite and initiate a fire. The heat released in the process is carried away by the fire effluent-air mixture, radiatively lost or transferred back to the solid material, to generate further pyrolysis products, thus continuing the process. Heat may also be transferred
49、to other nearby products, which may burn, and then release additional heat and fire effluent. The rate at which thermal energy is released in a fire is defined as the heat release rate. Heat release rate is important because of its influence on flame spread and on the initiation of secondary fires. Other characteristics are also important, such as ignitability, flame spread and other side effects of the fire (se
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