IEC 60691:2015
(Main)Thermal-links - Requirements and application guide
Thermal-links - Requirements and application guide
IEC 60691:2015 is applicable to thermal-links intended for incorporation in electrical appliances, electronic equipment and component parts thereof, normally intended for use indoors, in order to protect them against excessive temperatures under abnormal conditions. This standard may be applicable to thermal-links for use under conditions other than indoors, provided that the climatic and other circumstances in the immediate surroundings of such thermal-links are comparable with those in this standard. This standard may be applicable to thermal-links in their simplest forms (e.g. melting strips or wires), provided that molten materials expelled during function cannot adversely interfere with the safe use of the equipment, especially in the case of hand-held or portable equipment, irrespective of its position. Annex H of this standard is applicable to thermal-link packaged assemblies where the thermal-link(s) has already been approved to this standard but packaged in a metallic or non-metallic housing and provided with terminals/wiring leads. This standard is applicable to thermal-links with a rated voltage not exceeding 690 V a.c. or d.c. and a rated current not exceeding 63 A. The objectives of this standard are: to establish uniform requirements for thermal-links, to define methods of test, to provide useful information for the application of thermal-links in equipment. This standard is not applicable to thermal-links used under extreme conditions such as corrosive or explosive atmospheres. This standard is not applicable to thermal-links to be used in circuits on a.c. with a frequency lower than 45 Hz or higher than 62 Hz. This fourth edition cancels and replaces the third edition published in 2002, Amendment 1:2006 and Amendment 2:2010. This fourth edition constitutes a technical revision. This fourth edition includes the following significant technical changes with respect to the previous edition:
- requirements for thermal-link packaged assemblies;
- renew the requirements and definitions for Th-test;
- change starting temperature for interrupt current test;
- clarify requirements for marking (packing label);
- minimum Proof Tracking Index 175 instead 120. Keywords: thermal protection of equipment, thermal-links The contents of the corrigendum of August 2016 have been included in this copy.
Protecteurs thermiques - Exigences et guide d'application
L'IEC 60691:2015 est applicable aux protecteurs thermiques destinés à être incorporés dans les appareils électriques, le matériel électronique et ses composants, normalement utilisés à l'intérieur d'un local, afin de les protéger contre les températures excessives lors de conditions anormales. La présente Norme peut s'appliquer aux protecteurs thermiques utilisés dans d'autres conditions que celles qui sont réunies à l'intérieur d'un local, pourvu que les conditions climatiques ou autres de l'entourage immédiat de tels protecteurs thermiques soient comparables à celles de la présente Norme. La présente Norme peut s'appliquer aux protecteurs thermiques dans leurs formes les plus simples (par exemple les lames ou les fils de fusion), pourvu que le matériau fondu, expulsé pendant le fonctionnement, ne soit pas préjudiciable à la sécurité du matériel, particulièrement dans le cas du matériel tenu à la main, ou mobile indépendamment de sa position. L'Annexe H de la présente Norme s'applique aux ensembles conditionnés de protecteurs thermiques déjà conformes à la présente Norme mais conditionnés dans un boîtier métallique ou non métallique et munis de bornes/conducteurs à fils. La présente Norme s'applique aux protecteurs thermiques dont la tension assignée n'excède pas 690 V en courant alternatif ou en courant continu, et dont le courant assigné n'excède pas 63 A. Les objectifs de la présente Norme sont les suivants: établir des exigences uniformes pour les protecteurs thermiques, définir des méthodes d'essai, fournir des renseignements utiles pour l'utilisation des protecteurs thermiques dans les matériels. La présente Norme n'est pas applicable aux protecteurs thermiques utilisés dans des conditions extrêmes, telles que des atmosphères corrosives ou explosives. La présente Norme n'est pas applicable aux protecteurs thermiques destinés à être utilisés dans des circuits en courant alternatif avec une fréquence inférieure à 45 Hz ou supérieure à 62 Hz. Cette quatrième édition annule et remplace la troisième édition parue en 2002, l'Amendement 1:2006 et l'Amendement 2:2010. Cette quatrième édition constitue une révision technique. Cette quatrième édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- exigences relatives aux ensembles conditionnés de protecteurs thermiques;
- reformulation des exigences et des définitions relatives à l'essai Th;
- modification de la température initiale pour l'essai de courant de coupure;
- clarification des exigences de marquage (étiquette de conditionnement);
- Indice de tenue au cheminement minimum égal à 175 au lieu de 120. Mots clés: protection thermique des matériels, protecteurs thermiques Le contenu du corrigendum d'août 2016 a été pris en considération dans cet exemplaire.
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Edition 4.1 2019-01
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Thermal-links – Requirements and application guide
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IEC 60691 ®
Edition 4.1 2019-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
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Thermal-links – Requirements and application guide
INTERNATIONAL
ELECTROTECHNICAL
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ICS 29.120.50 ISBN 978-2-8322-6430-0
IEC 60691 ®
Edition 4.1 2019-01
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Thermal-links – Requirements and application guide
– 2 – IEC 60691:2015+AMD1:2019 CSV
© IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements . 10
5 General notes on tests . 11
6 Classification . 13
6.1 Electrical conditions . 13
6.2 Thermal conditions. 14
6.3 Resistance to tracking . 14
7 Marking . 14
8 Documentation . 15
9 Constructional requirements . 15
9.1 General . 15
9.2 Lead secureness tests . 16
9.2.1 General . 16
9.2.2 Tensile test . 16
9.2.3 Thrust test . 17
9.2.4 Bending/twist test . 17
9.3 Contacts used for the current path . 18
9.4 Accessible mounting brackets or metal parts . 18
9.5 Insulating materials . 18
9.6 Resistance to tracking . 18
9.7 Creepage distances and clearances . 18
9.8 Temperature and humidity cycle conditioning . 19
9.9 Terminals and terminations . 19
10 Electrical requirements . 19
10.1 Dielectric strength . 19
10.2 Insulation resistance . 20
10.3 Interrupting current . 21
10.3.1 General . 21
10.3.2 Specific conditions . 21
10.4 Transient overload current . 22
10.5 Limited short-circuit test . 23
10.5.1 General . 23
10.5.2 Test method . 23
10.5.3 Fuse size (rating) . 23
10.5.4 Compliance . 24
11 Temperature tests . 24
11.1 General . 24
11.2 Holding temperature, T . 24
h
11.3 Rated functioning temperature, T . 25
f
11.4 Maximum temperature limit, T . 25
m
© IEC 2019
11.5 Ageing . 25
12 Resistance to rusting . 26
13 Manufacturer’s validation programme . 26
Annex A (normative) Application guide. 28
Annex B (normative) Alternative ageing test for thermal-links with T greater than
h
250 °C for use in electric irons . 29
Annex C (normative) Conductive heat ageing test . 30
C.1 Conductive heat ageing test . 30
C.2 Method . 30
C.3 Ageing . 31
C.4 Results . 32
C.5 Dielectric strength test . 32
C.6 Test oven . 32
Annex D (informative) Extended holding temperature evaluation . 34
D.1 Extended holding temperature conditioning test . 34
D.2 Load current interrupt test . 34
Annex E (normative) Seal ageing test . 36
Annex F (normative) Identification requirements . 38
Annex G (normative) Indelibility of markings . 39
Annex H (normative) Requirements for thermal-link packaged assemblies . 40
Bibliography . 43
Figure 1 – Bending/twist test . 17
Figure C.1 – Typical test fixture assembly . 32
Figure C.2 – Typical thermal-link test oven . 33
Figure D.1 – Typical terminal block support test fixture . 35
Figure E.1 – Conditioning time versus oven temperature for proposed temperature
index. 37
Figure G.1 – Apparatus for testing durability of markings . 39
Table 1 – Test schedule . 13
Table 2 – Strength of leads and terminal parts – Minimum required tensile and thrust
test forces . 17
Table 3 – Creepage distances and clearances (absolute minimum values) . 19
Table 4 – Test voltages for dielectric strength . 20
Table 5 – Test current for interrupting test . 21
Table 6 – Limited short-circuit test capacity . 23
Table H.1 – Push and pull force . 41
Table H.2 – Minimum nominal cross-sectional area of conductor . 42
– 4 – IEC 60691:2015+AMD1:2019 CSV
© IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
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THERMAL-LINKS –
REQUIREMENTS AND APPLICATION GUIDE
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 accordanc
...
IEC 60691 ®
Edition 4.0 2015-10
INTERNATIONAL
STANDARD
NORME
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Thermal-links – Requirements and application guide
Protecteurs thermiques – Exigences et guide d'application
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IEC 60691 ®
Edition 4.0 2015-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Thermal-links – Requirements and application guide
Protecteurs thermiques – Exigences et guide d'application
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-2921-7
– 2 – IEC 60691:2015 © IEC 2015
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements . 10
5 General notes on tests . 11
6 Classification . 13
6.1 Electrical conditions . 13
6.2 Thermal conditions. 14
6.3 Resistance to tracking . 14
7 Marking . 14
8 Documentation . 15
9 Constructional requirements . 15
9.1 General . 15
9.2 Lead secureness tests . 16
9.2.1 General . 16
9.2.2 Tensile test . 16
9.2.3 Thrust test . 17
9.2.4 Bending/twist test . 17
9.3 Contacts used for the current path . 18
9.4 Accessible mounting brackets or metal parts . 18
9.5 Insulating materials . 18
9.6 Resistance to tracking . 18
9.7 Creepage distances and clearances . 18
9.8 Temperature and humidity cycle conditioning . 19
9.9 Terminals and terminations . 19
10 Electrical requirements . 19
10.1 Dielectric strength . 19
10.2 Insulation resistance . 20
10.3 Interrupting current . 21
10.3.1 General . 21
10.3.2 Specific conditions . 21
10.4 Transient overload current . 22
10.5 Limited short-circuit test . 23
10.5.1 General . 23
10.5.2 Test method . 23
10.5.3 Fuse size (rating) . 23
10.5.4 Compliance . 24
11 Temperature tests . 24
11.1 General . 24
11.2 Holding temperature, T . 24
h
11.3 Rated functioning temperature, T . 25
f
11.4 Maximum temperature limit, T . 25
m
11.5 Ageing . 25
12 Resistance to rusting . 26
13 Manufacturer’s validation programme . 26
Annex A (normative) Application guide. 28
Annex B (normative) Alternative ageing test for thermal-links with T greater than
h
250 °C for use in electric irons . 29
Annex C (normative) Conductive heat ageing test . 30
C.1 Conductive heat ageing test . 30
C.2 Method . 30
C.3 Ageing . 31
C.4 Results . 32
C.5 Dielectric strength test . 32
C.6 Test oven . 32
Annex D (informative) Extended holding temperature evaluation . 34
D.1 Extended holding temperature conditioning test . 34
D.2 Load current interrupt test . 34
Annex E (normative) Seal ageing test . 36
Annex F (normative) Identification requirements . 38
Annex G (normative) Indelibility of markings . 39
Annex H (normative) Requirements for thermal-link packaged assemblies . 40
Bibliography . 43
Figure 1 – Bending/twist test . 17
Figure C.1 – Typical test fixture assembly .
...
IEC 60691 ®
Edition 4.1 2019-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Thermal-links – Requirements and application guide
Protecteurs thermiques – Exigences et guide d'application
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
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The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
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committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC Customer Service Centre - webstore.iec.ch/csc entries have been collected from earlier publications of IEC
If you wish to give us your feedback on this publication or TC 37, 77, 86 and CISPR.
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IEC 60691 ®
Edition 4.1 2019-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Thermal-links – Requirements and application guide
Protecteurs thermiques – Exigences et guide d'application
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-8954-9
IEC 60691 ®
Edition 4.1 2019-01
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Thermal-links – Requirements and application guide
Protecteurs thermiques – Exigences et guide d'application
– 2 – IEC 60691:2015+AMD1:2019 CSV
© IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements . 10
5 General notes on tests . 11
6 Classification . 13
6.1 Electrical conditions . 13
6.2 Thermal conditions. 14
6.3 Resistance to tracking . 14
7 Marking . 14
8 Documentation . 15
9 Constructional requirements . 15
9.1 General . 15
9.2 Lead secureness tests . 16
9.2.1 General . 16
9.2.2 Tensile test . 16
9.2.3 Thrust test . 17
9.2.4 Bending/twist test . 17
9.3 Contacts used for the current path . 18
9.4 Accessible mounting brackets or metal parts . 18
9.5 Insulating materials . 18
9.6 Resistance to tracking . 18
9.7 Creepage distances and clearances . 18
9.8 Temperature and humidity cycle conditioning . 19
9.9 Terminals and terminations . 19
10 Electrical requirements . 19
10.1 Dielectric strength . 19
10.2 Insulation resistance . 20
10.3 Interrupting current . 21
10.3.1 General . 21
10.3.2 Specific conditions . 21
10.4 Transient overload current . 22
10.5 Limited short-circuit test . 23
10.5.1 General . 23
10.5.2 Test method . 23
10.5.3 Fuse size (rating) . 23
10.5.4 Compliance . 24
11 Temperature tests . 24
11.1 General . 24
11.2 Holding temperature, T . 24
h
11.3 Rated functioning temperature, T . 25
f
11.4 Maximum temperature limit, T . 25
m
© IEC 2019
11.5 Ageing . 25
12 Resistance to rusting . 26
13 Manufacturer’s validation programme . 26
Annex A (normative) Application guide. 28
Annex B (normative) Alternative ageing test for thermal-links with T greater than
h
250 °C for use in electric irons . 29
Annex C (normative) Conductive heat ageing test . 30
C.1 Conductive heat ageing test . 30
C.2 Method . 30
C.3 Ageing . 31
C.4 Results . 32
C.5 Dielectric strength test . 32
C.6 Test oven . 32
Annex D (informative) Extended holding temperature evaluation . 34
D.1 Extended holding temperature conditioning test . 34
D.2 Load current interrupt test . 34
Annex E (normative) Seal ageing test . 36
Annex F (normative) Identification requirements . 38
Annex G (normative) Indelibility of markings . 39
Annex H (normative) Requirements for thermal-link packaged assemblies . 40
Bibliography . 43
Figure 1 – Bending/twist test . 17
Figure C.1 – Typical test fixture assembly .
...
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