IEC 60269-4:2009/AMD2:2016

IEC 60269-4 ®
Edition 5.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 2
AM ENDEMENT 2
Low-voltage fuses –
Part 4: Supplementary requirements for fuse-links for the protection of
semiconductor devices
Fusibles basse tension –
Partie 4: Exigences supplémentaires concernant les éléments de remplacement
utilisés pour la protection des dispositifs à semiconducteurs

IEC 60269-4:2009-05/AMD2:2016-08(en-fr)

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IEC 60269-4 ®
Edition 5.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 2
AM ENDEMENT 2
Low-voltage fuses –
Part 4: Supplementary requirements for fuse-links for the protection of

semiconductor devices
Fusibles basse tension –
Partie 4: Exigences supplémentaires concernant les éléments de remplacement

utilisés pour la protection des dispositifs à semiconducteurs

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-3562-1

– 2 – IEC 60269-4:2009/AMD2:2016
© IEC 2016
FOREWORD
This amendment has been prepared by subcommittee SC 32B: Low voltage fuses, of IEC
technical committee TC 32: Fuses.
The text of this amendment is based on the following documents:
FDIS Report on voting
32B/651/FDIS 32B/663/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
1.1 Scope and object
Insert, after existing Note 3, the following new Note 4:
NOTE 4 These fuse-links are intended for use on systems employing the standardized voltages and tolerances of
IEC 60038. Tests carried out on fuse-links in accordance with previous editions of this standard shall remain valid
until such time as complimentary equipment has evolved to the standardized voltages and tolerances of IEC 60038.
Replace
d) availability and presentation of technical data (see Annex B).
with the following new text:
d) availability and presentation of technical data (see Annex BB).
1.2 Normative references
Replace the first two references with the following new references:
IEC 60269-1, Low-voltage fuses – Part 1: General requirements
IEC 60269-2, Low-voltage fuses – Part 2: Supplementary requirements for fuses for use by
authorized persons (fuses mainly for industrial application) – Examples of standardized
systems of fuses A to K
Add, after IEC 60269-3:
IEC TR 60269-5, Low-voltage fuses – Part 5: Guidance for the application of low-voltage
fuses
© IEC 2016
IEC 60269-6, Low-voltage fuses – Part 6: Supplementary requirements for fuse-links for the
protection of solar photovoltaic energy systems
Add, after IEC 60417:
IEC 60664-1:2000, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
2.2.105
voltage source inverter fuse-link
VSI fuse-link
Replace the second sentence of NOTE 2 with the following new text:
This short circuit condition leads to a very high rate of rise of current equivalent to a very low value of time
constant, typically 3 ms or less.
3.6.3 Time constant (τ)
Add, after Note 2, the following new NOTE 3:
NOTE 3 Instead of time constant di/dt can be used in case of short circuit condition
di/dt = E/L.
E= voltage value of the DC power source,
L = total inductance of the capacitor discharge circuit.
5.1.2 Fuse-links
Replace the order of the letters:
j)
k)
l)
by the following:
i)
j)
k)
Table 101 – Conventional times and currents for “gR” and “gS” fuse-links
In the third column, replace "1,13 I " by "1,1 I ".
n n
Replace, in the NOTE a:
In Annex C, some examples ….
by the following new text:
In Annex CC, some examples ….
5.7.2 Rated breaking capacity
Add, before the NOTE:
For VSI the rated breaking capacity is based on type tests performed in a circuit containing
very low inductance and resistance with d.c. or capacitor discharged applied voltage.

– 4 – IEC 60269-4:2009/AMD2:2016
© IEC 2016
7.4 Operation
Delete, in the 1st sentence of Subclause 7.4, "(see 8.4.3.4)".
Replace, at the beginning of the first indent, "its fuse-element"
by
"it"
8.3.3 Measurement of power dissipation of the fuse-link
Replace the first sentence of 8.3.3 with the following new text:
In addition to 8.3.3 of IEC 60269-1, the following applies: the power dissipation test shall be
made successively at least at 50 % and at 100 % of rated current. This test may be performed
with either ac or dc.
Add, after Subclause 8.3.3, the following new subclause and table:
8.3.4 Test method
The cross-sectional area of copper conductors for high current ratings tests corresponding to
Subclauses 8.3 and 8.4 is defined in Table 107.
...