BS EN 60695-11-20:2015:2016 Edition
$167.15
Fire hazard testing – Test flames. 500 W flame test methods
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 38 |
This part of IEC 60695 describes a test method consisting of two small-scale laboratory test procedures which is intended to compare the burning behaviour of different materials used in electrotechnical products. Vertically oriented bar specimens or horizontally oriented plate test specimens are exposed to a small flame ignition source with a nominal thermal power of 500 W. The test method uses two test specimen configurations to classify material performance. Rectangular bar-shaped test specimens are used to assess ignitability and burning behaviour, and square plate test specimens are used to assess the resistance of the test specimen to burn-through, as defined in 8.3.3. This test method only applies to materials that have been classified as V-0 or V-1 according to IEC 60695‑11‑10 .
This test method is only applicable to solid and cellular materials that have an apparent density of more than 250 kg/m 3, determined in accordance with ISO 845 . The method does not apply to materials that shrink away from the applied flame without igniting due to their thinness.
The test method described provides classifications which may be used for quality assurance, the pre-selection of component materials of products, or to verify the required minimum flammability classification of materials used in end products. If used for pre-selection, then positive results shall be obtained at a test specimen thickness which equals the smallest thickness used in the product application.
The results obtained provide some information about the behaviour of materials in service, but cannot by themselves assure safe performance in service.
Guidance on pre-selection is given in IEC 60695‑1‑30 [3] 1 .
Test results are influenced by material additives, e.g. pigments, fillers, and fire retardants, and properties such as the direction of anisotropy and the molecular mass.
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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | European foreword Endorsement notice |
| 5 | Annex ZA (normative) Normative references to international publications with their corresponding European publications |
| 7 | English CONTENTS |
| 9 | FOREWORD |
| 12 | INTRODUCTION |
| 13 | 1 Scope 2 Normative references |
| 14 | 3 Terms and definitions |
| 17 | 4 Principle |
| 18 | 5 Significance of the fire tests 5.1 General 5.2 Limitations on the use of test results 5.3 Physical properties that can effect burning behaviour 5.4 Shrinkage and distortion 5.5 Effects of test specimen conditioning 6 Apparatus 6.1 Laboratory fumehood/chamber |
| 19 | 6.2 Laboratory burner 6.3 Support stand 6.4 Timing device 6.5 Measuring scale 6.6 Conditioning chamber 6.7 Micrometer 6.8 Desiccator chamber 6.9 Air-circulating oven 6.10 Cotton pads |
| 20 | 6.11 Burner mounting block 7 Test specimens 7.1 Test specimen preparation 7.2 Bar test specimens 7.3 Plate test specimens 7.4 Testing materials – ranges in formulations 7.4.1 General |
| 21 | 7.4.2 Density, melt flows and filler/reinforcement 7.4.3 Colour (bar test specimens only) 7.5 Thickness measurements |
| 22 | 8 Test procedure 8.1 Conditioning 8.1.1 General 8.1.2 Conditioning of specimens in conditioning chamber (“As Received”) 8.1.3 Conditioning of specimens in air-circulating oven 8.1.4 Conditioning of the cotton pad 8.1.5 Test conditions Table 1 – Thickness tolerances |
| 23 | 8.2 Test procedure – bar test specimens 8.2.1 Test specimen setup 8.2.2 Flame setup 8.2.3 Flame application and observations |
| 24 | 8.2.4 Criteria for retest 8.3 Test procedure – plate shaped test specimens 8.3.1 Support stand 8.3.2 Flame setup 8.3.3 Flame application and observations 8.3.4 Criteria for retest |
| 25 | 8.4 Classification 8.5 Test report Table 2 – 5V burning classification |
| 26 | Figures Figure 1 – Vertical burning test for bar test specimen |
| 27 | Figure 2 – Horizontal burning test for plates Figure 3 – Burner mounting block – Example |
| 28 | Figure 4 – Test specimens |
| 29 | Figure 5 – Examples of flame application |
| 30 | Figure 6 – 5V specimen gauge (Example) |
| 31 | Annex A (normative) Detailed requirements for the flame application point A.1 Dynamic deformation A.2 J-shape or twisting deformation A.3 Curling deformation A.4 Severe deformation |
| 32 | Figure A.1 – Flame application points for a specimen which deforms dynamically |
| 33 | Figure A.2 – Flame application point for twisted and J-shaped specimens |
| 34 | Figure A.3 – Flame application point for a curled specimen |
| 35 | Figure A.4 – Flame application point when there is severe deformation |
| 36 | Bibliography |
