EN 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

IEC 60695-11-11:2021 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, sub-assemblies or their parts. 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. This part of IEC 60695 can be used in the fire hazard assessment and fire safety engineering procedures described in IEC 60695-1-10, IEC 60695-1-11 and IEC 60695-1-12. 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. This international standard is to be used in conjunction with IEC 60695-11-4. It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51.

Prüfungen zur Beurteilung der Brandgefahr - Teil 11-11: Prüfflammen - Bestimmung der charakteristischen Wärmestromdichte für eine Entzündung durch eine nicht berührende Flamme

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 60695-11-11:2021 décrit une méthode d’essai utilisée pour déterminer la densité de flux de chaleur caractéristique pour l’allumage (CHFI) à partir d’une flamme source sans contact pour les matériaux utilisés dans les produits et les sous-ensembles électrotechniques ou leurs composants. Elle donne une relation entre le temps d'allumage et la densité de flux de chaleur incident. Une éprouvette d’essai prélevée sur un produit fini ou un sous-ensemble peut être soumise à l’essai selon la présente méthode d’essai. La présente partie de l’IEC 60695 peut être utilisée dans l'évaluation des dangers d’incendie et les procédures d’ingénierie de la sécurité incendie décrites dans l’IEC 60695-1-10, l’IEC 60695 1 11 et l’IEC 60695-1-12. La présente publication fondamentale de sécurité est destinée à être utilisée par les comités d'études dans le cadre de l'élaboration de normes conformément aux principes établis dans le Guide IEC 104 et le Guide ISO/IEC 51. L'une des responsabilités d'un comité d'études consiste, le cas échéant, à utiliser les publications fondamentales de sécurité dans le cadre de l'élaboration de ses publications. Les exigences, les méthodes ou les conditions d'essai de la présente publication fondamentale de sécurité s'appliquent seulement si elles sont spécifiquement citées en référence ou incluses dans les publications correspondantes. Cette Norme internationale doit être utilisée conjointement avec l’IEC 60695-11-4. Elle a le statut d'une publication fondamentale de sécurité conformément au Guide IEC 104 et au Guide ISO/IEC 51.

Preskušanje požarne ogroženosti - 11-11. del: Preskusni plameni - Ugotavljanje karakterističnega toplotnega toka za vžig iz nestičnega vira plamena (IEC 60695-11-11:2021)

General Information

• Status: Published
• Publication Date: 22-Jul-2021
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 19.020 - Test conditions and procedures in general
• Technical Committee: CLC/SR 89 - Fire hazard testing
• Drafting Committee: IEC/TC 89 - IEC_TC_89
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 23-Jul-2021
• Completion Date: 23-Jul-2021
• Ref Project: SIST EN 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 (IEC 60695-11-11:2021)

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2021
Preskušanje požarne ogroženosti - 11-11. del: Preskusni plameni - Ugotavljanje
karakterističnega toplotnega toka za vžig iz nestičnega vira plamena (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 (IEC 60695-11-11:2021)
Prüfungen zur Beurteilung der Brandgefahr - Teil 11-11: Prüfflammen - Bestimmung der
charakteristischen Wärmestromdichte für eine Entzündung durch eine nicht berührende
Flamme (IEC 60695-11-11:2021)
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 60695-11-11:2021)
Ta slovenski standard je istoveten z: EN IEC 60695-11-11:2021
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
29.020 Elektrotehnika na splošno Electrical engineering in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60695-11-11

NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS 13.220.40; 19.020
English Version
Fire hazard testing - Part 11-11: Test flames - Determination of
the characteristic heat flux for ignition from a non-contacting
flame source
(IEC 60695-11-11:2021)
Essais relatifs aux risques du feu - Partie 11-11: Flammes Prüfungen zur Beurteilung der Brandgefahr - Teil 11-11:
d'essai - Détermination du flux de chaleur caractéristique Prüfflammen - Bestimmung der charakteristischen
pour l'allumage à partir d'une flamme source sans contact Wärmestromdichte für eine Entzündung durch eine nicht
(IEC 60695-11-11:2021) berührende Flamme
(IEC 60695-11-11:2021)
This European Standard was approved by CENELEC on 2021-07-01. 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-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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60695-11-11:2021 E

European foreword
The text of document 89/1482/CDV, future edition 1 of IEC 60695-11-11, prepared by IEC/TC 89 “Fire
hazard testing” was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–04–01
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–07–01
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60695-11-11:2021 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 60695-11–5 NOTE Harmonized as EN 60695-11–5
IEC 60695-11–10 NOTE Harmonized as EN 60695-11–10
IEC 60695-11–20 NOTE Harmonized as EN 60695-11–20
ISO 4589-2 NOTE Harmonized as EN ISO 4589-2
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60695-1-10 -  Fire hazard testing – Part 1–10: Guidance - EN 60695-1-10 -
for assessing the fire hazard of
electrotechnical products - General
guidelines
IEC 60695-1-11 -  Fire hazard testing - Part 1–11: Guidance - -
for assessing the fire hazard of
electrotechnical products - Fire hazard
assessment
IEC 60695-1-12 -  Fire hazard testing - Part 1–12: Guidance EN IEC 60695-1-12 -
for assessing the fire hazard of
electrotechnical products - Fire safety
engineering
IEC 60695-4 -  Fire hazard testing - Part 4: Terminology - -
concerning fire tests for electrotechnical
products
IEC 60695-11-4 -  Fire hazard testing - Part 11–4: Test EN 60695-11-4 -
flames - 50 W flame - Apparatus and
confirmational test method
IEC Guide 104 -  The preparation of safety publications and - -
the use of basic safety publications and
group safety publications
ISO/IEC Guide 51 Safety aspects - Guidelines for their
inclusion in standards
ISO 13943 2017 Fire safety - Vocabulary EN ISO 13943 2017
ISO 291 -  Plastics - Standard atmospheres for - EN ISO 291 -
conditioning and testing
ISO/TS 14934-4 -  Fire tests – Calibration of heat flux meters - -
– Part 4: Guidance on the use of heat flux
meters in fire tests
IEC 60695-11-11 ®
Edition 1.0 2021-05
INTERNATIONAL
STANDARD
colour
inside
BASIC SAFETY PUBLICATION
Fire hazard testing –
Part 11-11: Test flames – Determination of the characteristic heat flux for ignition

from a non-contacting flame source

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.220.40; 29.020 ISBN 978-2-8322-9835-0

– 2 – IEC 60695-11-11:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Principle of the test . 9
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 Heat flux meter mounting board . 11
5.6 Masking board . 12
5.7 Timing device . 12
5.8 Conditioning chamber . 12
5.9 Test specimen support . 12
5.10 Burner support . 12
5.11 Observation mirror . 13
5.12 Flow controller . 13
5.13 Heat flux meter supporting device . 13
6 Test specimen . 13
6.1 Dimensions of test specimen . 13
6.2 Testing ranges in formulations . 14
6.2.1 General . 14
6.2.2 Density, melt flows and filler/reinforcement . 14
6.2.3 Colour . 14
6.3 Conditioning of test specimens . 14
7 Testing conditions . 14
8 Test procedure . 14
8.1 Determination of incident heat flux calibration curve . 14
8.2 Determination of ignition time. 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
9.3 Analysis on CHFI (optional) . 17

10 Precision data . 17
11 Test report . 17
Annex A (informative) An example of the calibration curve of incident heat flux, Q,
versus the distance, D, between the top of the burner tube and the lower surface of the
test specimen . 18
A.1 Calibration curve . 18
Annex B (informative) Examples of ignition times with various materials of 3 mm
thickness . 20
B.1 Materials – Examples of measurements . 20
Annex C (informative) Precision data . 23

IEC 60695-11-11:2021 © IEC 2021 – 3 –
C.1 General . 23
C.2 Heat flux versus distance at different gas flow rates . 23
C.3 Repeatability . 24
C.4 Calculations and plots . 25
Annex D (informative) Method of positioning the heat flux meter . 28
D.1 General . 28
D.2 Positioning the heat flux meter . 28
Bibliography .
...