1、 IEC 60695-2-11 Edition 2.0 2014-02 REDLINE VERSION Fire hazard testing Part 2-11: Glowing/hot-wire based test methods Glow-wire flammability test method for end-products (GWEPT) IEC 60695-2-11:2014-02 RLV(EN) BASIC SAFETY PUBLICATION colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2
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11、t 2-11: Glowing/hot-wire based test methods Glow-wire flammability test method for end-products (GWEPT) INTERNATIONAL ELECTROTECHNICAL COMMISSION RN ICS 13.220.40, 29.020 PRICE CODE ISBN 978-2-8322-1408-4 BASIC SAFETY PUBLICATION Registered trademark of the International Electrotechnical Commission
12、Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 60695-2-11:2014 RLV IEC 2014 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 6 4 Description of test considerations and test specimen selection
13、Test specimens . 9 4.1 General . 9 4.2 Complete end product . 9 4.3 Partial end product (alternative) 9 4.4 Test considerations and limitations associated with the specimen configuration . 9 5 Description of the Test apparatus 10 6 Severities 11 76 Verification of the temperature measuring system 11
14、 87 Conditioning 11 7.1 Conditioning of test specimens . 11 7.2 Conditioning of specified layers 11 7.3 Testing conditions . 11 9 Initial measurement . 11 108 Test procedure 11 8.1 General . 12 8.2 Test temperatures . 12 8.3 Number of test specimens . 12 119 Observations and measurements . 12 1210 E
15、valuation of test results . 13 11 Test report . 13 1312 Information to be given in the relevant specification product standard 14 Annex A (informative) Guidance for glow wire test Suggested GWEPT temperatures . 16 Bibliography 17 Figure 1 Small parts . 10 Figure A.1 Suggested GWEPT temperatures . 16
16、 Table 1 Test severities . 11 Table 1 Test temperatures . 12 Table A.1 Guidance for glow-wire test 15 IEC 60695-2-11:2014 RLV IEC 2014 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIRE HAZARD TESTING Part 2-11: Glowing/hot-wire based test methods Glow-wire flammability test method for end-products
17、GWEPT) 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 standardizatio
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20、rnational 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
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25、loyees, 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 t
26、he 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
27、 possibility 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. DISCLAIMER This Redline version is not an official IEC Standard and is intended only to provide the user with an indica
28、tion of what changes have been made to the previous version. Only the current version of the standard is to be considered the official document. This Redline version provides you with a quick and easy way to compare all the changes between this standard and its previous edition. A vertical bar appea
29、rs in the margin wherever a change has been made. Additions and deletions are displayed in red, with deletions being struck through. 4 IEC 60695-2-11:2014 RLV IEC 2014 International Standard IEC 60695-2-11 has been prepared by IEC technical committee 89: Fire hazard testing. The text of this standar
30、d is based on the following documents: FDIS Report on voting 89/1197/FDIS 89/1206/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
31、2. It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51. This standard is to be used in conjunction with IEC 60695-2-10. This second edition of IEC 60695-2-11 cancels and replaces the first edition of IEC 60695-2-11 published in 2000. It constitutes a
32、 technical revision. The main changes with respect to the previous edition are listed below: 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 definitio
33、ns relevant 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 Clau
34、se 5 the 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
35、 Clause 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. The committee has decided that the contents of this publication will remain unchanged until the stability date
36、indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that
37、it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. IEC 60695-2-11:2014 RLV IEC 2014 5 INTRODUCTION The purpose of this Introduction is to provide background regarding the basic guidan
38、ce that prompted the preparation of this International 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
39、 and product design, as well as the choice of 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
40、 companion, IEC 60695-1-11, to provide guidance 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 o
41、f the enclosure of the electrotechnical product 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 inv
42、olving electrotechnical products can also be 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 wir
43、e is used to simulate such an ignition source. 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
44、 materials. This standard is used to assess the 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 flowi
45、ng through a wire, overloading of components, 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 assessme
46、nt which takes into account all of the factors 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
47、of this international standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 6 IEC 60695-2-11:2014 RLV IEC 2014 FIRE HAZARD TESTING Part 2-11: Glowing/hot-wire based test methods Glow-wire flammability test method for end
48、products (GWEPT) 1 Scope This part of IEC 60695 specifies the details of the glow-wire test to be applied to end-products for fire hazard testing 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
49、 hazard. For the purpose of this standard, end-product means electrotechnical equipment, its subassemblies, and components. This test method is used to check that, under defined test conditions, an end product exposed to an electrically heated 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 sta
