IEC 60691:2023/AMD1:2024
(Amendment)Amendment 1 - Thermal-links - Requirements and application guide
Amendment 1 - Thermal-links - Requirements and application guide
Amendement 1 - Protecteurs thermiques - Exigences et guide d'application
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IEC 60691 ®
Edition 5.0 2024-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Thermal-links – Requirements and application guide
Protecteurs thermiques – Exigences et guide d'application
IEC 60691:2023-03/AMD1:2024-10(en-fr)
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IEC 60691 ®
Edition 5.0 2024-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Thermal-links – Requirements and application guide
Protecteurs thermiques – Exigences et guide d'application
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-9901-2
– 2 – IEC 60691:2023/AMD1:2024
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
THERMAL-LINKS –
REQUIREMENTS AND APPLICATION GUIDE
AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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Amendment 1 to IEC 60691:2023 has been prepared by subcommittee 32C: Miniature fuses, of
IEC technical committee 32: Fuses.
The text of this Amendment is based on the following documents:
Draft Report on voting
32C/645/FDIS 32C/648/RVD
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 Amendment is English.
© IEC 2024
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/publications/.
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• withdrawn, or
• revised.
___________
Table 5 – Test current for interrupting test
Replace existing Table 5 with the following new table:
Type of rating Rated in Test current Power factor Time constant
AC amperes 1,5 times rated current 0,95 to 1,0 -
Resistive
DC amperes 1,5 times rated current - < 1 ms
Inductive AC amperes 1,5 times rated current 0,6 -
AC locked rotor
a
6 times full-load current 0,4 to 0,5 -
amperes (LRA)
Motor
10 times full-load rated
DC amperes - 2 ms to 5 ms
current
b
Pilot duty AC volt-amperes 0,35 -
Electric discharge lamp AC amperes 4 times rated current 0,4 to 0,5 -
Resistive/Inductive
c c c c
Combination
a
Or the specified value, such as horsepower, if locked rotor ampere rating is omitted.
b
See 10.3.2.8.
c
According to manufacturer's declaration (only in combination with resistive / inductive load).
H.9.5 Insulating materials
Replace the existing text of the first paragraph of H.9.5.101 (before the listed items) with the
following new text:
Polymeric material used to make the housing of the thermal-link packaged assembly shall have
the ratings listed below or be tested, at the specified thickness, in accordance with the relevant
standards. The epoxy or potting compound that is in contact with a live part shall not be
subjected to the requirements of H.9.5.101 except items c) and e). For small parts and
insignificant mass as defined in IEC 60695-2-11:2021, the GWIT test per item c) is not
applicable.
Replace the existing text of item c) of H.9.5.101 by the following new text:
c) glow-wire ignition test (GWIT) of 750 °C in accordance with IEC 60695-2-13;
– 4 – IEC 60691:2023/AMD1:2024
© IEC 2024
I.11.2.1
Add the following new text at the end of I.11.2.1:
The selected wire size should be the smallest cross-sectional area specified in Table 2 of
IEC 60730-1:2022.
I.11.2.3
Add the following new note at the end of I.11.2.3:
NOTE A thermocouple is arranged at the center of the huge mass metal block to monitor its body temperature. The
recommended size of the huge mass metal block is no less than 250 mm × 110 mm × 60 mm.
Replace the existing text of I.11.2.4 with the following new text:
I.11.2.4 The test fixture assembly with three specimens in series will be placed in the static-
air oven which is stabilized to the T temperature specified by the manufacturer. When the
h
temperature difference between the static-air oven and the huge mass metal block is within
1 °C, the thermal-links will be energized with the resistive rated current for 24 h or as declared
by manufacturer, whichever is higher.
___________
– 6 – IEC 60691:2023/AMD1:2024
© IEC 2024
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
PROTECTEURS THERMIQUES –
EXIGENCES ET GUIDE D'APPLICATION
AMENDEMENT 1
AVANT-PROPOS
1) La Commission Électrotechnique Internationale (IEC) est une organisation mondiale de normalisation composée
de l’ensemble des comités électrotechniques nationaux (Comités nationaux de l’IEC). L'IEC a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l'électricité et de l'électronique. À cet effet, l’IEC – entre autres activités – publie des Normes internationales,
des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au public (PAS) et des
Guides (ci-après dénommés "Publication(s) de l’IEC"). Leur élaboration est confiée à des comités d'études, aux
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travaux. L’IEC collabore étroitement avec l'Organisation Internationale de Normalisation (ISO), selon des
conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords o
...
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