BS EN 60695-11-3:2012 BSI Standards Publication Fire hazard testing Part 11-3: Test flames — 500 W flames — Apparatus and confirmational test methods (IEC 60695-11-3:2012) BRITISH STANDARD BS EN 60695-11-3:2012 National foreword This British Standard is the UK implementation of EN 60695-11-3:2012 It is identical to IEC 60695-11-3:2012 It supersedes DD IEC/TS 60695-11-3:2004, which is withdrawn The UK participation in its preparation was entrusted to Technical Committee GEL/89, Fire hazard testing A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2012 Published by BSI Standards Limited 2012 ISBN 978 580 70441 ICS 13.220.40; 29.020 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2012 Amendments issued since publication Amd No Date Text affected BS EN 60695-11-3:2012 EUROPEAN STANDARD EN 60695-11-3 NORME EUROPÉENNE EUROPÄISCHE NORM October 2012 ICS 13.220.40; 29.020 English version Fire hazard testing Part 11-3: Test flames - 500 W flames Apparatus and confirmational test methods (IEC 60695-11-3:2012) Essais relatifs aux risques du feu Partie 11-3: Flammes d'essai Flamme de 500 W Appareillage et méthodes d'essai de vérification (CEI 60695-11-3:2012) Prüfungen zur Beurteilung der Brandgefahr Teil 11-3: Prüfflammen 500-W-Prüfflamme Prüfeinrichtungen und Prüfverfahren zur Bestätigung (IEC 60695-11-3:2012) This European Standard was approved by CENELEC on 2012-09-17 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 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 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 Czech 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels © 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 60695-11-3:2012 E BS EN 60695-11-3:2012 EN 60695-11-3:2012 Foreword The text of document 89/1113/FDIS, future edition of IEC 60695-11-3, prepared by IEC/TC 89 "Fire hazard testing" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60695-11-3:2012 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) 2013-06-17 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2015-09-17 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 This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC) Endorsement notice The text of the International Standard IEC 60695-11-3:2012 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 60695-11-2:2003 NOTE Harmonised as EN 60695-11-2:2003 (not modified) IEC 60695-11-4:2011 NOTE Harmonised as EN 60695-11-4:2011 (not modified) BS EN 60695-11-3:2012 EN 60695-11-3:2012 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 For 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 Year Title EN/HD Year IEC 60584-1 1995 Thermocouples Part 1: Reference tables EN 60584-1 1995 IEC 60584-2 + A1 1982 1989 Thermocouples Part 2: Tolerances EN 60584-2 1993 IEC Guide 104 1997 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 13943 2008 Fire safety - Vocabulary EN ISO 13943 2010 ASTM B187/B187M-06 - Standard Specification for Copper, Bus Bar, Rod, and Shapes and General Purpose Rod, Bar, and Shapes 2) 1) EN 60584-2 includes A1 to IEC 60584-2 2) Superseded by IEC Guide 104:2010 - 1) BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 CONTENTS INTRODUCTION Scope Normative references Terms and definitions Method A – Production of a standardized 500 W nominal test flame based on existing hardware 4.1 4.2 Requirements Apparatus and fuel 4.2.1 Burner 4.2.2 Flowmeter 4.2.3 Manometer 4.2.4 Control valve 4.2.5 Copper block 4.2.6 Thermocouple 4.2.7 Temperature/time indicating/recording devices 4.2.8 Fuel gas 4.2.9 Laboratory fumehood/chamber 4.3 Production of the test flame 10 4.4 Confirmation of the test flame 10 4.4.1 Principle 10 4.4.2 Procedure 10 4.4.3 Verification 11 Method C – Production of a standardized 500 W nominal test flame based on non adjustable hardware 11 5.1 5.2 Requirements 11 Apparatus and fuel 11 5.2.1 Burner 11 5.2.2 Flowmeters 11 5.2.3 Manometers 12 5.2.4 Control valves 12 5.2.5 Copper block 12 5.2.6 Thermocouple 12 5.2.7 Temperature/time indicating/recording devices 12 5.2.8 Fuel gas 12 5.2.9 Air supply 12 5.2.10 Laboratory fumehood/chamber 13 5.3 Production of the test flame 13 5.4 Confirmation of the test flame 13 5.4.1 Principle 13 5.4.2 Procedure 13 5.4.3 Verification 14 Classification and designation 14 Annex A (normative) Test arrangements – Method A 17 Annex B (normative) Test arrangement – Method C 21 BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 Annex C (informative) Recommended arrangements for the use of either of the test flames 26 Annex D (informative) Test arrangements for tests on equipment 27 Annex E (informative) Test arrangements for tests on material 28 Bibliography 29 Figure – Flame dimensions 15 Figure – Copper block 15 Figure – Flame height gauge 16 Figure A.1 – General assembly and details 18 Figure A.2 – Supply arrangement for burner (example) 19 Figure A.3 – Confirmatory test arrangement 20 Figure B.1 – Burner, method C – General assembly 21 Figure B.2 – Burner details – Burner barrel, O-ring, air manifold and air supply tube 22 Figure B.3 – Burner details – Gas supply tube and gas jet 23 Figure B.4 – Burner details – Burner base and elbow block 23 Figure B.5 – Supply arrangement for burner (example) 24 Figure B.6 – Confirmatory test arrangement 25 Figure D.1 – Examples of test arrangements 27 Figure E.1 – Examples of test arrangements 28 BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 –6– 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 possible 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 Work initiated by ACOS resulted in a series of standards that make available standardized test flames covering a range of powers for the use of all product committees needing such test flames A needle flame is described in IEC 60695-11-5, a 50 W flame is described in IEC 60695-11-4, and a kW flame is described in IEC 60695-11-2 This international standard provides a description of the apparatus required to produce either of two 500 W test flames, and also provides a description of a calibration procedure to check that the test flame produced meets given requirements Guidance on confirmatory tests for test flames is given in IEC 60695-11-40 Four 500 W test flame methods were originally specified in Edition of IEC/TS 60695-11-3, with the intention that users would determine a ranking preference This process has resulted in two of these flame methods, B and D, being withdrawn, as shown below: 500 W test flame method Flame type Gas Approximate flame height / mm A Pre-mixed Methane 125 B C D Withdrawn Pre-mixed Methane or propane 125 Withdrawn Method A was first published in 1994 and was based on existing hardware The flame is produced by burning methane, and the method makes use of a more tightly specified version of a burner that was used in some countries for many years Method C is based on non-adjustable hardware that has been specifically developed to produce a highly repeatable and stable test flame The flame is produced by burning either methane or propane Both methods have been developed as technical enhancements of previous technology BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 –7– FIRE HAZARD TESTING – Part 11-3: Test flames – 500 W flames – Apparatus and confirmational test methods Scope This part of IEC 60695-11 provides detailed requirements for the production of either of two 500 W nominal, pre-mixed type test flames The approximate overall height of each flame is 125 mm Two methods of producing a test flame are described: Method A uses methane Method C can use either methane or propane This basic safety publication is intended for use 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 The requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the relevant publications Normative references The following documents, in whole or in part, are normatively 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 IEC 60584-1:1995, Thermocouples – Part 1: Reference tables IEC 60584-2 am.1 ed.1:1989, Amendment 1, Thermocouples – Part 2: Tolerances IEC Guide 104:1997, 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 13943:2008, Fire safety – Vocabulary ASTM-B187/B187M-06, Standard Specification for Copper, Bus Bar, Rod, and Shapes and General Purpose Rod, Bar, and Shapes –8– BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 13945, as well as the following definition apply 3.1 standardized 500 W nominal test flame test flame that conforms to this international standard and meets all of the requirements given in Clause and Clause Method A – Production of a standardized 500 W nominal test flame based on existing hardware 4.1 Requirements A standardized 500 W nominal test flame, according to this method, is one that is: – produced using hardware according to Figures A.1 and A.2, – supplied with methane gas of purity not less than 98 % at a flow rate equivalent to 965 ml/min ± 30 ml/min at 23 °C, 0,1 MPa 1, and at a back pressure of 125 mm ± mm water, using the arrangements of Figure A.2 The flame shall be symmetrical, stable and give a result of 54 s ± s in the confirmatory test described in 4.4 The confirmatory test arrangement shown in Figure A.3 shall be used The approximate dimensions of the flame (see Figure 1), when measured in the laboratory fumehood/chamber using the gauge as described in Figure 3, should be: – height of inner blue cone: 40 mm; – overall height of flame: 125 mm 4.2 4.2.1 Apparatus and fuel Burner The burner shall be in accordance with Figure A.1 NOTE The burner tube, gas injector and needle valve are removable for cleaning purposes Care should be taken on re-assembly that the needle valve tip is not damaged and that the needle valve and valve seat (gas injector) are correctly aligned 4.2.2 Flowmeter The flowmeter shall be appropriate for the measurement of the gas flow rate of 965 ml/min at 23 °C, 0,1 MPa to a tolerance of ± % NOTE A mass flowmeter is the preferred means of controlling accurately the input flow rate of fuel to the burner Other methods may be used if they can show equivalent accuracy _ When corrected from the measurements taken under actual conditions of use BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 – 18 – Burner tube Valve seat Lock-nut Main body Suitable packing material Needle valve packing nut Adjustable stop for valve Needle valve Material: brass or any other suitable material Figure A.1 – General assembly and details IEC 004/2000 BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 – 19 – Gas flowmeter Burner Control valve Manometer Adjustable air inlet Fuel gas source Needle valve adjustment IEC 426/04 NOTE A manometer is required in conjunction with a mass flowmeter in order to maintain the required back pressure NOTE The inner diameter of the tubes connecting the flowmeters to the burner must be of adequate size to minimize pressure drop Figure A.2 – Supply arrangement for burner (example) BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 – 20 – Dimensions in millimetres Suspension point 55 ± 75 Temperature measurement apparatus After ensuring that the thermocouple is inserted the full depth of the hole, the copper is compressed around the thermocouple to retain it without damage IEC 427/04 The mode of suspension of the copper block shall be such that the copper block remains essentially stationary during the test Figure A.3 – Confirmatory test arrangement BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 – 21 – Annex B (normative) Test arrangement – Method C Air supply Gas supply IEC 014/2000 Key burner barrel Parts 1, 2, and are hard-soldered on assembly O rings air manifold Parts and may be hard-soldered together, if necessary, to prevent leakage of gas air supply tube gas supply tube elbow block burner base gas jet Parts and may be fabricated in one piece, or fastened together, to prevent gas leakage Parts 1, 2, and are detailed in Figure B.2 Parts and are detailed in Figure B.3 Parts and are detailed in Figure B.4 Figure B.1 – Burner, method C – General assembly ∅ 21 ∅ 18 3,4 100 ± 10 Minimum area of air inlets 225 mm2 ∅ 16,5 ∅ 18 ∅ 21 slots equally spaced around diameter 3,4 deep 23 ∅ 13,5 × pitch ∅ 11,1 ∅ 9,5 ± 0,3 6,5 30° Material: brass or any other suitable material Tolerances on linear dimensions: ± 0,1 mm, unless otherwise stated Tolerances on angular dimensions: ± 30 min, unless otherwise stated Figure B.2 – Burner details – Burner barrel, O-ring, air manifold and air supply tube ∅ 12 ∅ 18 ∅ 21 A ∅ 14 × pitch A 90° groove × deep ∅ 31 ∅ 35 Dimensions to fit burner approximately ∅ 21,5 1,5 ∅ 10 Section A-A 9,5 4 Section B-B 23,5 25 20 0,5 B Dimensions to fit burner approximately ∅ 17 ∅ 12 90° ∅8 90° ∅8 ∅ 10 ∅ 12 B IEC 015/2000 ∅ through hole 9,5 ∅ 9,5 ± 0,3 – 22 – BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 Dimensions in millimetres 10 BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 – 23 – Dimensions in millimetres ∅ 10 × pitch ∅6 ∅7 Drill ∅ 0,7 for methane Drill ∅ 0,5 for propane 10 33 35° ∅ × 0,8 pitch IEC 016/2000 Material: brass or any other suitable material Tolerances on linear dimensions: ± 0,1 mm, unless otherwise stated Tolerances on angular dimensions: ± 30 min, unless otherwise stated Figure B.3 – Burner details – Gas supply tube and gas jet Dimensions in millimetres ∅ × 0,8 pitch ∅ 80 Drill/tap three holes ∅ 2,5 × 0,45 pitch (Dimensions are given as an example) 20 10 14 RCD 26 ∅ 10 × pitch ∅4 ∅ 2,5 ∅ 14 × pitch ∅ 20 10 ∅ 20 Material: brass or any other suitable material Tolerances on linear dimensions: ± 0,1 mm, unless otherwise stated NOTE The shape of part is given as an example Figure B.4 – Burner details – Burner base and elbow block IEC 017/2000 – 24 – BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 Air flowmeter Control valve Source air Manometer Gas flowmeter Control valve Fuel gas source Manometer IEC 428/04 The inner diameter of the tubes connecting the flowmeters to the burner must be of adequate size to minimize pressure drop Compressed air to be essentially free of oil and water NOTE Manometers are not required when mass flowmeters are used Figure B.5 – Supply arrangement for burner (example) BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 – 25 – Dimensions in millimetres Suspension point 55 ± 75 Temperature measurement apparatus After ensuring that the thermocouple is inserted the full depth of the hole, the copper is compressed around the thermocouple to retain it without damage IEC 429/04 The mode of suspension of the copper block shall be such that the copper block remains essentially stationary during the test Figure B.6 – Confirmatory test arrangement – 26 – BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 Annex C (informative) Recommended arrangements for the use of either of the test flames The criteria to be used for the selection of the appropriate test arrangements are given in Annexes D and E When used for testing equipment, unless otherwise stated in the relevant specification, the recommended distance from the top of the burner tube to the point on the surface of the test specimen to be tested is approximately 55 mm, and the burner is fixed in position during the test NOTE The distance of 55 mm was chosen to give better reproducibility than the position where the tip of the inner blue cone should just not touch the test specimen (distance = mm to mm) When used for testing bar test specimens, where the operator may move the flame during the test to follow the distorting or burning test specimen, the tip of the inner blue cone should just not touch test specimen (distance = mm to mm) The burner is tilted in such a way that debris falling from the test specimen under test does not fall into the burner BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 – 27 – Annex D (informative) Test arrangements for tests on equipment Figure D.1 gives examples of test arrangements Dimensions in millimetres B 55 55 A 20° 20° 55 C 20° IEC 030/2000 Figure D.1 – Examples of test arrangements BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 – 28 – Annex E (informative) Test arrangements for tests on material Figure E.1 gives examples of test arrangements Sheet specimen 20° Strip specimen (2 views) 20° Side view Front view Figure E.1 – Examples of test arrangements IEC 031/2000 BS EN 60695-11-3:2012 60695-11-3 © IEC:2012 – 29 – Bibliography IEC 60695-11-2:2003, Fire hazard testing – Part 11-2: Test flames – kW nominal pre-mixed flame – Apparatus, confirmatory test arrangement and guidance IEC 60695-11-4:2011, Fire hazard testing – Part 11-4: Test flames – 50 W flame - Apparatus and confirmational test method IEC/TS 60695-11-40:2002, Fire hazard testing – Part 11-40: Test flames – Confirmatory tests – Guidance This page deliberately left blank This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions Our British Standards and other publications are updated by amendment 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