BS EN 60695-8-1:2017 – TC:2020 Edition
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Tracked Changes. Fire hazard testing – Heat release. General guidance
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 66 |
IEC 60695-8-1:2016 provides guidance on the measurement and interpretation of heat release from electrotechnical products and materials from which they are constructed. Heat release data can be used as part of fire hazard assessment and in fire safety engineering, as described in IEC 60695-1-11 and IEC 60695-1-12. This third edition cancels and replaces the second edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – a modified Introduction; – reference to IEC 60695-1-12; – updated normative references; – revised terms and definitions; – new text in 4.2.2, 4.2.3, 6.1 and 6.4, including several mandatory statements and – mandatory statements in a new Subclause 6.5. This standard is to be used in conjunction with IEC 60695-8-2. It has the status of a horizontal standard in accordance with /2 and ISO/IEC Guide 51. Key words: Fire Hazard, Heat Release, Fire Safety Engineering
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 40 | English CONTENTS |
| 42 | FOREWORD |
| 44 | INTRODUCTION |
| 45 | 1 Scope 2 Normative references 3 Terms and definitions |
| 49 | 4 Principles of determining heat release 4.1 Complete combustion measured by the oxygen bomb calorimeter |
| 50 | 4.2 Incomplete combustion 4.2.1 Measurement techniques 4.2.2 Heat release by oxygen consumption |
| 51 | 4.2.3 Heat release by carbon dioxide generation 4.2.4 Heat release by increase of gas temperature |
| 52 | Tables Table 1 – Relationship between heat of combustion expressed in units of kJ·g−1of fuel burned and kJ·g−1 of oxygen consumed for a variety of fuels |
| 53 | 5 Parameters used to report heat release data 5.1 Heat of combustion (gross and net) 5.2 Heat release rate (HRR) Table 2 – Relationship between heat of combustion expressed in units of kJ·g−1of fuel burned and kJ·g−1 of oxygen consumed for a variety of insulating liquids |
| 54 | 5.3 Heat release (HR) 5.4 Heat release rate per unit area (HRR*) Figures Figure 1 – Heat release rate (HRR) curve Figure 2 – Heat release (HR) curve |
| 55 | 5.5 Total heat release 5.6 Peak heat release rate 5.7 Time to peak heat release rate 5.8 Effective heat of combustion 5.8.1 Measurement and calculation Figure 3 – Heat release rate per unit area (HRR*) curve |
| 56 | 5.8.2 Examples Figure 4 – Mass loss curve |
| 57 | 5.9 FIGRA index Figure 5 – FIGRA curve derived from Figure 1 |
| 58 | 5.10 ARHE and MARHE Figure 6 – Illustrative HRR curve Figure 7 – FIGRA curve derived from Figure 6 |
| 59 | Figure 8 – ARHE curve derived from Figure 1 Figure 9 – ARHE curve derived from Figure 6 |
| 60 | 6 Considerations for the selection of test methods 6.1 Ignition sources 6.2 Type of test specimen 6.3 Choice of conditions 6.4 Test apparatus 6.4.1 General 6.4.2 Small-scale fire test apparatus |
| 61 | 6.4.3 Intermediate and large-scale fire test apparatus 6.4.4 Comparison between small-scale and intermediate/large-scale fire test methods 6.5 Choice of fire tests 7 Relevance of heat release data 7.1 Contribution to fire hazard 7.2 Secondary ignition and flame spread |
| 62 | 7.3 Determination of self-propagating fire thresholds 7.4 Probability of reaching flash-over 7.5 Smoke and toxic gas production 7.6 The role of heat release testing in research and development |
| 63 | Bibliography |
