1、BSI Standards PublicationFire hazard testingPart 2-11: Glowing/hot-wire based test methods Glow-wire flammability test method for end-products (GWEPT)BS EN 60695-2-11:2014National forewordThis British Standard is the UK implementation of EN 60695-2-11:2014. It isidentical to IEC 60695-2-11:2014. It
2、supersedes BS EN 60695-2-11:2001which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/89, Fire hazard testing.A list of organizations represented on this committee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
3、 the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 54940 3ICS 13.220.40; 29.020Compliance with a British Standard cannot confer immunity fromlegal obligations.This Bri
4、tish Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2014.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60695-2-11:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60695-2-11 July 2014 ICS 13.220.40;
5、29.020 Supersedes EN 60695-2-11:2001 English Version Fire hazard testing - Part 2-11: Glowing/hot-wire based test methods - Glow-wire flammability test method for end-products (GWEPT) (IEC 60695-2-11:2014) Essais relatifs aux risques du feu - Partie 2-11: Essais au fil incandescent/chauffant - Mthod
6、e dessai dinflammabilit pour produits finis (GWEPT) (CEI 60695-2-11:2014) Prfungen zur Beurteilung der Brandgefahr - Teil 2-11: Prfungen mit dem Glhdraht - Prfung mit dem Glhdraht zur Entflammbarkeit von Enderzeugnissen (GWEPT) (IEC 60695-2-11:2014) This European Standard was approved by CENELEC on
7、2014-03-13. 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 alteration. Up-to-date lists and bibliographical references concerning such national standards may
8、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 language made by translation under the responsibility of a CENELEC member into its own language and not
9、ified 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 Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
10、 Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation E
11、lectrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60695-2-11:2014 E BS EN 60695-2-11:2014EN 60695-2
12、-11:2014 - 2 - Foreword The text of document 89/1197/FDIS, future edition 2 of IEC 60695-2-11, prepared by IEC/TC 89 “Fire hazard testing“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60695-2-11:2014. The following dates are fixed: latest date by which the document ha
13、s to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-01-11 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017-03-13 This document supersedes EN 60695-2-11:2001. EN 60695-2-11:2014 in
14、cludes the following significant technical changes with respect to EN 60695-2-11:2001: The Introduction has been added to provide background and how it relates to the Scope. The Scope has been modified for greater clarity and reference to basic safety publications. Numerous terms and definitions rel
15、evant to this Standard have been added to Clause 3. The application of “small parts” and “insignificant mass” have been introduced and clarified. The different types of specimens, how to specify them, and limitations of the test method have been further clarified in Clause 4. Clarified in Clause 5 t
16、he distance to specified layer when unknown. The information from Clause 6 has been moved into the test procedure in Clause 8. The conditioning of the specified layer and the laboratory ambient test conditions were clarified in Clause 7. Measurement of the maximum flame height was removed from Claus
17、e 9. The reference to this test as “GWEPT” was introduced along with an applicable title change. Annex A has been revised to reflect current practice by prominent product committees. This standard is to be used in conjunction with EN 60695-2-10. Attention is drawn to the possibility that some of the
18、 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. BS EN 60695-2-11:2014- 3 - EN 60695-2-11:2014 Endorsement notice The text of the International Standard IEC 60695-2-11:2014 was approved by
19、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 Harmonised as EN 60695-1-10 (not modified). IEC 60695-1-11 NOTE Harmonised as EN 60695-1-11 (not modified). IEC 60
20、695-2-12 NOTE Harmonised as EN 60695-2-12 (not modified). IEC 60695-2-13 NOTE Harmonised as EN 60695-2-13 (not modified). IEC 60335-1 NOTE Harmonised as EN 60335-1 (modified). IEC 60695-4:2012 NOTE Harmonised as EN 60695-4:2012 (not modified). ISO/IEC 13943:2008 NOTE Harmonised as EN ISO 13943:2010.
21、 BS EN 60695-2-11:2014EN 60695-2-11:2014 - 4 - Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. F
22、or dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication
23、 Year Title EN/HD Year ISO/IEC Guide 51 Safety aspects - Guidelines for their inclusion in standards - - IEC Guide 104 The preparation of safety publications and the use of basic safety publications and group safety publications - - IEC 60695-2-10 Fire hazard testing - Part 2-10: Glowing/hot-wire ba
24、sed test methods - Glow-wire apparatus and common test procedure EN 60695-2-10 BS EN 60695-2-11:2014 2 60695-2-11 IEC:2014 CONTENTS INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 6 4 Test specimens . 8 4.1 General 8 4.2 Complete end product 8 4.3 Partial end product (alt
25、ernative) . 8 4.4 Test considerations and limitations associated with the specimen configuration 9 5 Test apparatus 10 6 Verification of the temperature measuring system 10 7 Conditioning 10 7.1 Conditioning of test specimens 10 7.2 Conditioning of specified layers . 10 7.3 Testing conditions 10 8 T
26、est procedure 10 8.1 General 10 8.2 Test temperatures 11 8.3 Number of test specimens 11 9 Observations and measurements . 11 10 Evaluation of test results . 12 11 Test report . 12 12 Information to be given in the relevant product standard 12 Annex A (informative) Suggested GWEPT temperatures 13 Bi
27、bliography 14 Figure 1 Small parts . 9 Figure A.1 Suggested GWEPT temperatures . 13 Table 1 Test temperatures . 11 BS EN 60695-2-11:201460695-2-11 IEC:2014 5 INTRODUCTION The purpose of this Introduction is to provide background regarding the basic guidance that prompted the preparation of this Inte
28、rnational Standard and how it relates to the Scope. In the design of any electrotechnical product, the risk of fire and the potential hazards associated with fire need to be considered. In this respect the objective within the design of component, circuit, and product design, as well as the choice o
29、f the materials, is to reduce to acceptable levels the potential risks of fire during normal operating conditions, reasonable foreseeable abnormal use, malfunction, and/or failure. IEC Technical Committee 89 has developed IEC 60695-1-10, together with its companion, IEC 60695-1-11, to provide guidan
30、ce on how this is to be accomplished. The primary aims of IEC 60695-1-10 and IEC 60695-1-11 are to provide guidance on how: a) to prevent ignition caused by an electrically energized component part, and b) to confine any resulting fire within the bounds of the enclosure of the electrotechnical produ
31、ct in the event of ignition. Secondary aims of these documents include the minimization of any flame spread beyond the products enclosure and the minimization of harmful effects of fire effluents such as heat, smoke, toxicity and/or corrosivity. Fires involving electrotechnical products can also be
32、initiated from external non-electrical sources. Considerations of this nature should be dealt with in the overall fire hazard assessment. In electrotechnical equipment, overheated metal parts can act as ignition sources. In glow-wire tests, a glowing wire is used to simulate such an ignition source.
33、 IEC 60695-2-10 describes a glow-wire test apparatus and common test procedure, IEC 60695-2-12 describes a glow-wire flammability index (GWFI) test method for materials, and IEC 60695-2-13 describes a glow-wire ignition temperature (GWIT) test method for materials. This standard is used to assess th
34、e reaction of end products to heat caused by contact with an electrically heated wire under controlled laboratory conditions. This may be useful for the evaluation of end products that may be exposed to excess thermal stress such as a fault current flowing through a wire, overloading of components,
35、and/or poor electrical connections. It should not be used to solely describe or appraise the fire hazard or fire risk of products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire hazard assessment which takes into account all of the factors
36、 which are pertinent to a particular end use. This international standard may involve hazardous materials, operations, and equipment. It does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this international standard to establish ap
37、propriate safety and health practices and determine the applicability of regulatory limitations prior to use. BS EN 60695-2-11:2014 6 60695-2-11 IEC:2014 FIRE HAZARD TESTING Part 2-11: Glowing/hot-wire based test methods Glow-wire flammability test method for end-products (GWEPT) 1 Scope This part o
38、f IEC 60695 specifies a test method on an end product. It is intended to simulate the effects of thermal stresses produced by an electrically heated source to represent a fire hazard. This test method is used to check that, under defined test conditions, an end product exposed to an electrically hea
39、ted source has either a limited ability to ignite or, if it ignites, a limited ability to propagate flame. However, the fire hazard analysis, the flammability aspects and the flame spreading to other products are not covered by the present standard. This basic safety publication is intended for use
40、by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. Th
41、e requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the relevant publications. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispens
42、able 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. IEC 60695-2-10, Fire hazard testing Part 2-10: Glowing/hot-wire based test methods Glow-wire apparatus and common
43、test procedure IEC Guide 104, The preparation of safety publications and the use of basic safety publications and group safety publications ISO/IEC Guide 51, Safety aspects Guidelines for their inclusion in standards 3 Terms and definitions For the purpose of this document the following terms and de
44、finitions apply. 3.1 burn, intransitive verb undergo combustion SOURCE: ISO/IEC 13943:2008, definition 4.28 BS EN 60695-2-11:201460695-2-11 IEC:2014 7 3.2 combustible, adjective capable of being ignited and burned SOURCE: ISO/IEC 13943:2008, definition 4.43 3.3 combustion exothermic reaction of a su
45、bstation with an oxidizing agent Note 1 to entry: Combustion generally emits fire effluent accompanied by flames and/or glowing. SOURCE: ISO/IEC 13943:2008, definition 4.46 3.4 enclosure electrotechnical external casing protecting the electrical and mechanical parts of apparatus Note 1 to entry: The
46、 term excludes cables. SOURCE: ISO/IEC 13943:2008, definition 4.78 3.5 end product product that is ready for use without modification Note 1 to entry: An end product can be a component of another end product. SOURCE: IEC 60695-4:2012, definition 3.2.7 3.6 fire hazard physical object or condition wit
47、h a potential for an undesirable consequence from fire SOURCE: ISO/IEC 13943:2008, definition 4.112 3.7 fire hazard assessment evaluation of the possible causes of fire, the possibility and nature of subsequent fire growth, and the possible consequences of fire SOURCE: IEC 60695-4:2012, definition 3
48、.2.10 3.8 fire risk probability of a fire combined with a quantified measure of its consequence Note 1 to entry: It is often calculated as the product of probability and consequence. SOURCE: ISO/IEC 13943:2008, definition 4.124 3.9 flame rapid, self sustaining, sub-sonic propagation of combustion in
49、 a gaseous medium, usually with emission of light SOURCE: ISO/IEC 13943:2008, definition 4.133 BS EN 60695-2-11:2014 8 60695-2-11 IEC:2014 3.10 flame spread propagation of a flame front SOURCE: ISO/IEC 13943:2008, definition 4.142 3.11 flammability ability of a material or product to burn with a flame under specified conditions SOURCE: ISO/IEC 13943:2008, definition 4.151 3.12 glowing, adjective emitting light without flame from the combustion of a material
