1、BRITISH STANDARD BS EN 60695-11-5:2005 Fire hazard testing Part 11-5: Test flames Needle-flame test method Apparatus, confirmatory test arrangement and guidance The European Standard EN 60695-11-5:2005 has the status of a British Standard ICS 13.220.40; 29.020 BS EN 60695-11-5:2005 This British Stan
2、dard was published under the authority of the Standards Policy and Strategy Committee on 7 April 2005 BSI 7 April 2005 ISBN 0 580 45747 8 National foreword This British Standard is the official English language version of EN 60695-11-5:2005. It is identical with IEC 60695-11-5:2004. It supersedes BS
3、 EN 60695-2-2:1995 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEL/89, Fire hazard testing, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The Br
4、itish Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards O
5、nline. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the respon
6、sible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN titl
7、e page, pages 2 to 19 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60695-11-5 NORME EUROPENNE EUROPISCHE NORM March 2005 CENELEC European Committee for
8、 Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
9、 Ref. No. EN 60695-11-5:2005 E ICS 13.220.40; 29.020 Supersedes EN 60695-2-2:1994 + A1:1995English version Fire hazard testing Part 11-5: Test flames - Needle-flame test method - Apparatus, confirmatory test arrangement and guidance (IEC 60695-11-5:2004) Essais relatifs aux risques du feu Partie 11-
10、5: Flammes dessai - Mthode dessai au brleur-aiguille - Appareillage, dispositif dessai de vrification et lignes directrices (CEI 60695-11-5:2004) Prfungen zur Beurteilung der Brandgefahr Teil 11-5: Prfflammen - Prfverfahren mit der Nadelflamme - Versuchsaufbau, Vorkehrungen zur Besttigungsprfung und
11、 Leitfaden (IEC 60695-11-5:2004) This European Standard was approved by CENELEC on 2005-02-01. 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-t
12、o-date lists and bibliographical references concerning such national standards may be obtained on application 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 u
13、nder the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany
14、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 89/676/FDIS, future edition 1 of IEC 60695-11-5, prepared by IEC TC 89, Fire hazar
15、d testing, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60695-11-5 on 2005-02-01. This European Standard supersedes EN 60695-2-2:1994 + A1:1995. The structure of the standard remains essentially the same with some major new changes and concepts added: The scope ha
16、s been broadened to allow this test method to also simulate the effects of small flames from outside the equipment. A new concept has been added which allows the burner to be moved during the test to avoid dripping material from falling onto the tip of the burner tube. The burner tube material is no
17、w a referenced source. The reference for the copper block material has changed - the ISO publication (ISO 1337) has been withdrawn with no replacement. A new callout is now used. Informative Annex B and a bibliography have been added. The following dates were fixed: latest date by which the EN has t
18、o be implemented at national level by publication of an identical national standard or by endorsement (dop) 2005-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the In
19、ternational Standard IEC 60695-11-5:2004 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: ISO 9626 NOTE Harmonized as EN ISO 9626:1995 (not modified). _ Page2 EN60695115:
20、2005 CONTENTS INTRODUCTION.4 1 Scope.5 2 Normative references .5 3 Terms and definitions .5 4 General description of the test6 5 Description of the test apparatus 6 5.1 Burner.6 5.2 Flame6 5.3 Laboratory fumehood/chamber 6 5.4 Specified layer 7 5.5 Timing device7 6 Test specimen7 7 Severities .8 8 C
21、onditioning .8 9 Test procedure .8 9.1 Position of test specimen 8 9.2 Application of needle-flame .8 9.3 Number of test specimens .8 10 Observations and measurements9 11 Evaluation of test results 9 12 Information to be given in the relevant specification .9 13 Test report10 Annex A (normative) Con
22、firmatory test arrangement12 Annex B (informative) Access to equipment manufacturers and suppliers 17 Annex ZA (normative) Normative references to international publications with their corresponding European publications 18 Bibliography19 Figure 1 Needle burner 11 Figure A.1 Copper block 14 Figure A
23、.2 Confirmatory test arrangement15 Figure A.3 Gauge to measure flame height (example)16 Page3 EN60695115:2005 INTRODUCTION The best method for testing electrotechnical products with regard to fire hazard is to duplicate exactly the conditions occurring in practice. In most instances this is not poss
24、ible. Accordingly, for practical reasons, the testing of electrotechnical products with regard to fire hazard is best conducted by simulating as closely as possible the actual effects occurring in practice. Parts of electrotechnical equipment which might be exposed to excessive thermal stress due to
25、 electric effects, the deterioration of which might impair the safety of the equipment, should not be unduly affected by heat and by fire generated within the equipment. Parts of insulating material or of other combustible material which are liable to propagate flames inside the equipment may be ign
26、ited by flames produced by a failing component. Under certain conditions, for example a fault current flowing over a tracking path, overloading of components or parts and bad connections, flames may also occur; such flames may impinge upon combustible parts in the vicinity. This part of IEC 60695 sh
27、ould be used to measure and describe the properties of materials, products or assemblies in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions
28、. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use. This standard may involve hazardous materials, operations and equipment. It does not purport
29、to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Page4 EN60695115:2005 FIRE HAZARD TESTING Part 11-5: Test
30、flames Needle-flame test method Apparatus, confirmatory test arrangement and guidance 1 Scope This part of IEC 60695 specifies a needle-flame test to simulate the effect of a small flame which may result from fault conditions, in order to assess by a simulation technique the fire hazard. It is appli
31、cable to electrotechnical equipment, its sub-assemblies and components and to solid electrical insulating materials or other combustible materials. One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publica
32、tions. 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 references, the latest edition of the referenced document (including any amendments) applies. IEC Guide 104:1997,
33、 The preparation of safety publications and the use of basic safety publications and group safety publications ISO/IEC Guide 51:1999, Safety aspects Guidelines for their inclusion in standards ISO/IEC 13943:2000, Fire safety Vocabulary ISO 4046-4:2002, Paper, board, pulps and related terms Vocabular
34、y Part 4: Paper and board grades and converted products ASTM-B187, Standard specification for copper, bus bar, rod, and shapes and general purpose rod, bar, and shapes 3 Terms and definitions For the purposes of this document, the terms and definitions of ISO/IEC 13943 apply. Page5 EN60695115:2005 4
35、 General description of the test Warning Precautions shall be taken to safeguard the health of the personnel conducting tests against: the risks of explosion or fire; the inhalation of smoke and/or toxic products; toxic residues. The test is performed to determine that, under defined conditions, the
36、 test flame does not cause ignition of parts, or that a combustible part ignited by the test flame has a limited duration of burning or a limited extent of burning, without spreading fire by flames or burning or glowing particles falling from the test specimen. This test determines the effects on th
37、e test specimen of a small flame such as may arise from other ignited components and the relevant product specification shall specify the duration of flame application and the criteria for acceptance. 5 Description of the test apparatus 5.1 Burner The burner to produce the test flame shall consist o
38、f a tube at least 35 mm long with a bore of 0,5 mm 0,1 mm and an outer diameter not exceeding 0,9 mm. NOTE The tubing specified in ISO 9626 1 1(0,8 mm normal walled or thin walled) meets the requirements in this standard for an internal diameter of 0,5 mm 0,1 mm and an outside diameter no greater th
39、an 0,9 mm. The burner is supplied with butane or propane gas having a purity of at least 95 %. There shall be no air admitted to the burner tube. 5.2 Flame With the axis of the burner in the vertical position, the gas supply is adjusted so that the length of the flame is 12 mm 1 mm, when viewed in s
40、ubdued light against a dark background (see Figure 1a). The flame shall be confirmed using the apparatus and procedure detailed in Annex A. The test time for the temperature to increase from 100 C 5 C to 700 C 3 C shall be 23,5 s 1,0 s. 5.3 Laboratory fumehood/chamber The laboratory fumehood/chamber
41、 shall have an inside volume of at least 0,5 m 3 . The chamber shall provide a draught-free environment, whilst allowing normal thermal circulation of air past the test specimen. The chamber shall permit observation of the test in progress. The inside surfaces of the walls shall be of a dark colour.
42、 _ 1Figures in square brackets refer to the bliography. Page6 EN60695115:2005 For safety and convenience, it is desirable that this enclosure (which can be completely closed) be fitted with an extraction device, such as an exhaust fan, to remove products of combustion, which may be toxic. The extrac
43、tion device shall be turned off during the test and turned on immediately after the timing measurements have been made. A positive closing damper may be needed. NOTE Placing a mirror in the chamber, to provide a rear view of the test specimen, has been found to be useful. 5.4 Specified layer To eval
44、uate the possibility of spread of fire, for example by burning or glowing particles falling from the test specimen, a layer of the material or components normally surrounding or situated underneath the test specimen is placed underneath the test specimen at a distance equal to the distance between t
45、he test specimen and the surrounding material or components when the test specimen is mounted as in normal use. If the test specimen is a sub-assembly or a component of the equipment and is tested separately, a piece of flat smooth wooden board, approximately 10 mm thick covered in close contact wit
46、h a single layer of wrapping tissue, is positioned at a distance of 200 mm 5 mm below the place where the needle-flame is applied to the test specimen, unless otherwise specified in the relevant specification. Wrapping tissue as specified in 4.215 of ISO 4046-4 is a soft and strong, lightweight wrap
47、ping tissue 12 g/m 2to 30 g/m 2 . If the test specimen is a complete free-standing equipment, it is placed in its normal position of use on the tissue covered wooden board, extending for a minimum of 100 mm outside the base of the equipment in all directions. If the test specimen is a complete wall-
48、mounted equipment, it is fixed in its normal position of use 200 mm 5 mm above the tissue covered wooden board. Means to fix the test specimen and the burner in position may be necessary. 5.5 Timing device The timing device shall have a tolerance of not more than 0,5 s. 6 Test specimen If possible,
49、the test specimen shall be a complete equipment, sub-assembly or component. If it is necessary to take away parts of an enclosure or to cut off a suitable part to perform the test, care shall be taken to ensure that the test conditions are not significantly different from those occurring in normal use with regard to shape, ventilation conditions, effect of thermal stresses and poss
