IEC TS 60695-11-11:2008

Fire hazard testing - Part 11-11: Test flames - Determination of the characteristic heat flux for ignition from a non-contacting flame source

IEC/TS 60695-11-11:2008 Describes a test method used to determine the characteristic heat flux for ignition (CHFI) from a non-contacting flame source for materials used in electrotechnical products and sub-assemblies. It provides a relationship between ignition time and incident heat flux. A test specimen cut from an end-product or sub-assembly can be tested by this test method. Has the status of a basic safety publication in accordance with IEC Guide 104.

Essais relatifs aux risques du feu - Partie 11-11: Flammes d'essai - Détermination du flux de chaleur caractéristique pour l'allumage à partir d'une flamme source sans contact

CEI/TS 60695-11-11:2008 Décrit une méthode d'essai utilisée pour déterminer le flux de chaleur caractéristique pour l'allumage (CHFI) à partir d'une flamme source qui n'est pas en contact pour les matériaux utilisés dans les produits et les sous-ensembles électrotechniques. Elle donne une relation entre le temps d'allumage et le flux de chaleur incident. Une éprouvette prélevée sur un produit fini ou un sous-ensemble peut être soumise aux essais de la présente méthode d'essai. A le statut d une publication fondamentale de sécurité conformément au Guide 104 de la CEI.

General Information

• Status: Published
• Publication Date: 07-Sep-2008
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: TC 89 - Fire hazard testing
• Drafting Committee: WG 12 - TC 89/WG 12
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 18-Feb-2016

Relations

• Revised: IEC 60695-11-11:2021 - Fire hazard testing - Part 11-11: Test flames - Determination of the characteristic heat flux for ignition from a non-contacting flame source
• Effective Date: 05-Sep-2023
• Revised: IEC TS 60695-11-11:2016 - Fire hazard testing - Part 11-11: Test flames - Determination of the characteristic heat flux for ignition from a non-contacting flame source
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC/TS 60695-11-11
Edition 1.0 2008-09
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 11-11:Test flames – Determination of the characteristic heat flux for ignition
from a non-contacting flame source

Essais relatifs aux risques du feu –
Partie 11-11: Flammes d'essai – Détermination du flux de chaleur caractéristique
pour l'allumage à partir d'une flamme source sans contact

IEC/TS 60695-11-11:2008
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IEC/TS 60695-11-11
Edition 1.0 2008-09
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 11-11:Test flames – Determination of the characteristic heat flux for ignition
from a non-contacting flame source

Essais relatifs aux risques du feu –
Partie 11-11: Flammes d'essai – Détermination du flux de chaleur caractéristique
pour l'allumage à partir d'une flamme source sans contact

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
S
CODE PRIX
ICS13.220.40; 29.020 ISBN 2-8318-9998-2
– 2 – TS 60695-11-11 © IEC:2008
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 Principle of the test .8
5 Apparatus.9
5.1 Test arrangement .9
5.2 Burner and test flame .11
5.3 Heat flux meter.11
5.4 Data acquisition system.11
5.5 Dummy test specimen board .11
5.6 Masking board.12
5.7 Timing device .13
5.8 Conditioning .13
5.9 Test specimen support .13
5.10 Burner support .13
5.11 Observation mirror .13
6 Test specimen .13
6.1 Specimen preparation .13
6.2 Test specimen dimensions .14
6.3 Testing ranges in formulations.14
6.3.1 General .14
6.3.2 Density, melt flows and filler/reinforcement.14
6.3.3 Colour .14
6.4 Conditioning of test specimens.14
7 Testing conditions .15
8 Test procedure .15
8.1 Determination of incident heat flux calibration curve.15
8.2 Determination of ignition times .15
8.3 Repetition of the test at different heat flux values .16
9 Evaluation of test results .16
9.1 Average ignition time t .16
ig
9.2 Report format for CHFI .16
10 Test report.17
Annex A (informative) An example of the calibration curve of incident heat flux versus
the distance between the top of the burner tube and the lower surface of the test
specimen .18
Annex B (informative) Examples of ignition times with various materials of 3 mm
thickness .20
Bibliography.23

Figure 1 – Arrangement and position of test specimen and burner .10
Figure 2 – Dummy test specimen board .12
Figure 3 – Structure of the masking board .13

TS 60695-11-11 © IEC:2008 – 3 –
Figure A.1 – Calibration curve (example) .18
Figure B.1－Example of ignition times of PMMA .20
Figure B.2 – Ignition times for ABS (example) .21
Figure B.3 – Ignition times for HIPS (example).22

Table A.1 – Calibration data (examples of actual measured data as shown in
Figure A.1).19
Table A.2 – Calibration data (examples of interpolated values) .19
Table B.1 – Illustrative example of tabulated results .22

– 4 – TS 60695-11-11 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 11-11:Test flames –
Determination of the characteristic heat flux for ignition
from a non-contacting flame source

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