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EN 60695-8-1:2017

(Main)

Fire hazard testing - Part 8-1: Heat release - General guidance

Fire hazard testing - Part 8-1: Heat release - General guidance

IEC 60695-8-1 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 the future IEC 60695-1-10 and the future IEC 60695-1-11. 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. Major changes with respect to the first edition are as follows: - editorial changes throughout, - revised terms and definitions, - new text concerning bomb calorimetry, - revised Table 1a, - new clause 5-Parameters used to report heat release data and introduction of intermediate scale fire test.

Prüfungen zur Beurteilung der Brandgefahr - Teil 8-1: Wärmefreisetzung - Allgemeiner Leitfaden

Essais relatifs aux risques du feu - Partie 8-1: Dégagement de chaleur - Guide général

La CEI 60695-8-1 fournit les lignes directrices sur la mesure et l'interprétation du dégagement de chaleur des produits électrotechniques et des matériaux à partir desquels ils sont fabriqués. Il est possible d'utiliser les résultats de dégagement de chaleur pour évaluer les risques dus au feu et pour la mise au point technique de la sécurité vis-à-vis du feu, comme décrit dans la future CEI 60695-1-10 et dans la CEI 60695-1-11. Cette publication fondamentale de sécurité est destinée à être utilisée par les comités d'études pour l'établissement de leurs normes conformément aux principes exposés dans le Guide 104 de la CEI et dans le Guide ISO/CEI 51. Les principales modifications par rapport à l'édition antérieure sont indiquées ci-dessous: - modifications rédactionnelles dans toute la publication; - termes et définitions révisés; - nouveau texte sur la bombe calorimétrique; - Tableau 1a révisé; - nouvel Article 5- Paramètres utilisés pour indiquer les résultats de dégagement de chaleur et introduction de l'essai au feu à échelle intermédiaire.

Preskušanje požarne ogroženosti - 8-1. del: Oddajanje toplote - Splošno navodilo (IEC 60695-8-1:2016)

Standard IEC 60695-8-1 zagotavlja smernice za merjenje in interpretacijo oddajanja toplote iz elektrotehničnih izdelkov in materialov, iz katerih so ti izdelki izdelani. Podatki o oddani toploti se lahko uporabljajo za oceno nevarnosti požara in v inženiringu požarne varnosti, kot bo opisano v prihodnjem standardu IEC 60695-1-10 in IEC 60695-1-11. Ta osnovna varnostna publikacija je namenjena tehničnim odborom za pripravo standardov v skladu z načeli vodil IEC 104 in ISO/IEC 51. Glavne spremembe glede na prvo različico so naslednje:  – uredniške spremembe v celotnem besedilu, – revidirani pogoji in definicije, – novo besedilo, ki zadeva merjenje z bombnim kalorimetrom, – revidirana preglednica 1a, – nova točka 5 – Parametri, ki se uporabljajo za poročanje podatkov o oddani toploti, in uvedba lestvice požarnih preskusov.

General Information

Status
Published
Publication Date
09-Feb-2017
Withdrawal Date
19-Dec-2019
ICS
13.220.40 - Ignitability and burning behaviour of materials and products
29.020 - Electrical engineering 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
10-Feb-2017
Completion Date
10-Feb-2017
Ref Project
SIST EN 60695-8-1:2017 - Fire hazard testing - Part 8-1: Heat release - General guidance (IEC 60695-8-1:2016)

Relations

Replaces
EN 60695-8-1:2008 - Fire hazard testing - Part 8-1: Heat release - General guidance
Effective Date
25-Jan-2023

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SLOVENSKI STANDARD
01-april-2017
1DGRPHãþD
SIST EN 60695-8-1:2008
Preskušanje požarne ogroženosti - 8-1. del: Oddajanje toplote - Splošno navodilo
(IEC 60695-8-1:2016)
Fire hazard testing - Part 8-1: Heat release - General guidance (IEC 60695-8-1:2016)
Prüfungen zur Beurteilung der Brandgefahr - Teil 8 -1: Wärmefreisetzung - Allgemeiner
Leitfaden (IEC 60695-8-1:2016)
Essais relatifs aux risques du feu - Partie 8-1: Dégagement de chaleur - Guide général
(IEC 60695-8-1:2016)
Ta slovenski standard je istoveten z: EN 60695-8-1:2017
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 60695-8-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2017
ICS 13.220.40; 29.020 Supersedes EN 60695-8-1:2008
English Version
Fire hazard testing - Part 8-1: Heat release - General guidance
(IEC 60695-8-1:2016)
Essais relatifs aux risques du feu - Partie 8-1: Dégagement Prüfungen zur Beurteilung der Brandgefahr - Teil 8-1:
de chaleur - Guide général Wärmefreisetzung - Allgemeiner Leitfaden
(IEC 60695-8-1:2016) (IEC 60695-8-1:2016)
This European Standard was approved by CENELEC on 2016-12-20. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60695-8-1:2017 E
European foreword
The text of document 89/1342/FDIS, future edition 3 of IEC 60695-8-1, prepared by IEC/TC 89 "Fire
hazard testing" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN
60695-8-1:2017.
The following dates are fixed:
(dop) 2017-09-20
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2019-12-20
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60695-8-1:2008.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60695-8-1:2016 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 60695-1-10 NOTE Harmonized as EN 60695-1-10.
IEC 60695-1-11 NOTE Harmonized as EN 60695-1-11.
IEC 60695-1-12 NOTE Harmonized as EN 60695-1-12.
ISO 1716 NOTE Harmonized as EN ISO 1716.
IEC 60836:2015 NOTE Harmonized as EN 60836:2015.
IEC 61099:2010 NOTE Harmonized as EN 61099:2010.
IEC 60867:1993 NOTE Harmonized as EN 60867:1994.
IEC 60296:2012 NOTE Harmonized as EN 60296:2012.
ISO 13927 NOTE Harmonized as EN ISO 13927.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When 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 60695-4 2012 Fire hazard testing -- Part 4: Terminology EN 60695-4 2012
concerning fire tests for electrotechnical
products
IEC 60695-8-2 -  Fire hazard testing -- Part 8-2: Heat FprEN 60695-8-2 -
release - Summary and relevance of test
methods
IEC Guide 104 -  The preparation of safety publications and - -
the use of basic safety publications and
group safety publications
ISO 13943 2008 Fire safety - Vocabulary EN ISO 13943 2010
ISO/IEC Guide 51 -  Safety aspects - Guidelines for their - -
inclusion in standards
IEC 60695-8-1 ®
Edition 3.0 2016-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ

Fire hazard testing –
Part 8-1: Heat release – General guidance

Essais relatifs aux risques du feu –

Partie 8-1: Dégagement de chaleur – Guide général

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.220.40; 29.020 ISBN 978-2-8322-3749-6

– 2 – IEC 60695-8-1:2016  IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Principles of determining heat release . 11
4.1 Complete combustion measured by the oxygen bomb calorimeter . 11
4.2 Incomplete combustion . 12
4.2.1 Measurement techniques . 12
4.2.2 Heat release by oxygen consumption . 12
4.2.3 Heat release by carbon dioxide generation . 13
4.2.4 Heat release by increase of gas temperature . 13
5 Parameters used to report heat release data . 15
5.1 Heat of combustion (gross and net) . 15
5.2 Heat release rate (HRR) . 15
5.3 Heat release (HR) . 16
5.4 Heat release rate per unit area (HRR*) . 16
5.5 Total heat release . 17
5.6 Peak heat release rate . 17
5.7 Time to peak heat release rate . 17
5.8 Effective heat of combustion . 17
5.8.1 Measurement and calculation . 17
5.8.2 Examples. 18
5.9 FIGRA index . 19
5.10 ARHE and MARHE . 20
6 Considerations for the selection of test methods . 22
6.1 Ignition sources . 22
6.2 Type of test specimen . 22
6.3 Choice of conditions . 22
6.4 Test apparatus . 22
6.4.1 General . 22
6.4.2 Small-scale fire test apparatus . 22
6.4.3 Intermediate and large-scale fire test apparatus . 23
6.4.4 Comparison between small-scale and intermediate/large-scale fire test
methods . 23
6.5 Choice of fire tests . 23
7 Relevance of heat release data . 23
7.1 Contribution to fire hazard . 23
7.2 Secondary ignition and flame spread . 23
7.3 Determination of self-propagating fire thresholds . 24
7.4 Probability of reaching flash-over . 24
7.5 Smoke and toxic gas production . 24
7.6 The role of heat release testing in research and development . 24
Bibliography . 25

IEC 60695-8-1:2016  IEC 2016 – 3 –
Figure 1 – Heat release rate (HRR) curve . 16
Figure 2 – Heat release (HR) curve . 16
Figure 3 – Heat release rate per unit area (HRR*) curve . 17
Figure 4 – Mass loss curve . 18
Figure 5 – FIGRA curve derived from Figure 1 . 19
Figure 6 – Illustrative HRR curve . 20
Figure 7 – FIGRA curve derived from Figure 6 . 20
Figure 8 – ARHE curve derived from Figure 1 . 21
Figure 9 – ARHE curve derived from Figure 6 . 21

−1
Table 1 – Relationship between heat of combustion expressed in units of kJ·g of
−1
fuel burned and kJ·g of oxygen consumed for a variety of fuels . 14
−1
Table 2 – Relationship between heat of combustion expressed in units of kJ·g of
−1
fuel burned and kJ·g of oxygen consumed for a variety of insulating liquids . 15

– 4 – IEC 60695-8-1:2016  IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 8-1: Heat release – General guidance

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 i
...

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