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)

This part of IEC 60695 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.

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)

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-Aug-2021
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: I09 - Imaginarni 09
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 27-Jul-2021
• Due Date: 01-Oct-2021
• Completion Date: 23-Aug-2021
• Ref Project: 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

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 60695-11-11:2021
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
SIST EN IEC 60695-11-11:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60695-11-11:2021


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

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SIST EN IEC 60695-11-11:2021
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
EN IEC 60695-11-11:2021.
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
2

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SIST EN IEC 60695-11-11:2021
EN IEC 60695-11-11:2021 (E)
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

3

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SIST EN IEC 60695-11-11:2021




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




  Warning! Make sure that you obtained this publication from an authorized distributor.


® Registered trademark of the International Electrotechnical Commission

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SIST EN IEC 60695-11-11:2021
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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

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SIST EN IEC 60695-11-11:2021
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 . 30

Figure 1 – Arrangement and position of test specimen and burner . 10
Figure 2 – Heat flux meter mounting board . 11
Figure 3 – Structure of the masking board . 12
Figure 4 – Heat flux meter supporting device . 13
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) . 21
3
Figure C.1 – Incident heat flux calibration curve (gas flow rate 105 cm /min) . 23
3
Figure C.2 – Incident heat flux calibration curve (gas flow rate 160 cm /min) . 24
Figure C.3 – Plot of 1/ t for material A . 26
ig
Figure C.4 – Plot of 1/t for material B . 26
ig
Figure C.5 – Plot of 1/ t for material C . 27
ig
Figure C.6 – Plot of 1/ t for material D . 27
ig
Figure D.1 – Positioning the heat flux meter . 28
Figure D.2 – Correct position of the test specimen support and the heat flux meter. 29

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 – Value of Figure B.1 . 20
Table B.2 – Value of Figure B.2 . 21
Table B.3 – Value of Figure B.3 . 22
Table B.4 – Description example of tabulated test results . 22
Table C.1 – Precision data of ignition time . 25

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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

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60695-11-11 has been prepared by IEC technical committee 89: Fire hazard testing.
It has the status of a basic safety publication in accordance with IEC Guide 104 and
ISO/IEC Guide 51.
The text of this International Standard is based on the following documents:
CDV Report on voting
89/1482/CDV 89/1507/RVC

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

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SIST EN IEC 60695-11-11:2021
IEC 60695-11-11:2021 © IEC 2021 – 5 –
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This international standard is to be used in conjunction with IEC 60695-11-4.
A list of all the parts in the IEC 60695 series, under the general title Fire hazard testing, can be
found on the IEC website.
Part 11 consists of the following parts:
Part 11-2: Test flames – 1 kW nominal pre-mixed flame – Apparatus, confirmatory test
arrangement and guidance
Part 11-3: Test flames – 500 W flames – Apparatus and confirmational test methods
Part 11-4: Test flames – 50 W flame – Apparatus and confirmational test method
Part 11-5: Test flames – Needle-flame test method – Apparatus, confirmatory test
arrangement and guidance
Part 11-10: Test flames – 50 W horizontal and vertical flame test methods
Part 11-11: Test flames – Determination of the characteristic heat flux for ignition from non-
contacting flame source
Part 11-20: Test flames – 500 W flame test methods
Part 11-30: Test flames – History and development from 1979 to 1999
Part 11-40: Test flames – Confirmatory tests – Guidance
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

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INTRODUCTION
In the design of any electrotechnical product, the risk of fire and the potential hazards
associated with fire need to be considered. In this respect the objective of component, circuit
and equipment design as well as the choice of materials is to reduce, to acceptable levels, the
potential risks of fire even in the event of foreseeable abnormal use, malfunction or failure.
IEC 60695-1-10, IEC 60695-1-11 and IEC 60695-1-12 provide guidance on how this is to be
accomplished.
Fires involving electrotechnical products can be initiated from external non-electrical sources.
Considerations of this nature are dealt with in an overall fire hazard assessment.
The aim of the IEC 60695 series of standards is to save lives and property by reducing the
number of fires or reducing the consequences of the fire. This can be accomplished by
– trying to prevent ignition caused by an electrically energised component part and, in the
event of ignition, to confine any resulting fire within the bounds of the enclosure of the
electrotechnical product.
– trying to minimise flame spread beyond the product’s enclosure and to minimise the harmful
effects of fire effluents including heat, smoke and toxic or corrosive combustion products.
This international standard is to be used to measure and describe the properties of materials
used for electrotechnical products and sub-assemblies in response to heat from a non-
contacting flame source or heat source under controlled laboratory conditions which is
characterized by quantitative heat input (heat flux) to the materials. Results of this test may be
used as elements of a fire risk assessment which takes into account all of the factors which are
pertinent to an assessment of the fire hazard of a particular end use. A test specimen cut from
an end-product or sub-assembly can be tested by this test method.
This international standard may involve hazardous materials, operations, and equipment. It
does not purport to address all of the safety problems associated with its use. It is the
responsibility of the user to establish appropriate safety and health practices and determine the
applicability of regulatory limitations prior to use.
Test methods to determine flammability by contact of flame have been developed and
1
standardized already, such as IEC 60695-11-5 [1] , IEC 60695-11-10 [2], IEC 60695-11-20 [3]
and ISO 4589-2 [4].
This is the first test method to determine the characteristic heat flux for ignition (CHFI) of
materials used for electrotechnical products, sub-assemblies or parts from a non-contacting
flame source. CHFI characterizes ignition behaviour in terms of incident heat flux. This test
method simulates the fire behaviour of materials used for electrotechnical products where a
flame source or heat source exists close to, but does not contact with, these items. An example
is a candle flame near an electrotechnical product.


__________
1
 Numbers in square brackets refer to the bibliography.

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IEC 60695-11-11:2021 © IEC 2021 – 7 –
FIRE HAZARD TESTING –

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



1 Scope
This part of IEC 60695 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.
2 Normative references
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.
IEC 60695-1-10, Fire hazard testing – Part 1-10: Guidance 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 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 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

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ISO 13943:2017, Fire safety – Vocabulary
ISO 291, Plastics – Standard atmospheres for conditioning and tes
...