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

IEC 60269-2:2013 provides supplementary requirements for fuses for use by authorized persons and are generally designed to be used in installations where the fuse-links are accessible to, and may be replaced by, authorized persons only. Fuses for use by authorized persons according to the following fuse systems also comply with the requirements of the corresponding subclauses of IEC 60269-1, unless otherwise defined in this standard. This standard is divided into fuse systems, each dealing with a specific example of standardized fuses for use by authorized persons:
- Fuse system A: Fuses with fuse-links with blade contacts (NH fuse system),
- Fuse system B: Fuses with striker fuse-links with blade contacts (NH fuse system),
- Fuse system C: Fuse-rails (NH fuse system),
- Fuse system D: Fuse-bases for busbar mounting (NH fuse system),
- Fuse system E: Fuses with fuse-links for bolted connections (BS bolted fuse system),
- Fuse system F: Fuses with fuse-links having cylindrical contact caps (NF cylindrical fuse system),
- Fuse system G: Fuses with fuse-links with offset blade contacts (BS clip-in fuse system),
- Fuse system H: Fuses with fuse-links having "gD" and "gN" characteristic (class J and class time delay and non time delay fuse types),
- Fuse system I: gU fuse-links with wedge tightening contacts,
- Fuse system J: Fuses with fuse-links having "gD class CC" and "gN class CC" characteristics (class CC time delay and non-time delay fuse types),
- Fuse system K: gK fuse-links with blade for bolted connections - High fuse-link ratings from 1 250 A up to 4 800 A (master fuse-links). This fifth edition of IEC 60269-2 cancels and replaces the fourth edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
1. fuse systems A and B: modified values for the power dissipation of NH aM fuse-links;
2. fuse systems A and B: introduction of dimension r for NH fuse-links;
3. addition of new fuse system K: gK fuse-links with contacts for bolted connections. Key Words: fuse systems A to K, requirements for fuses
This publication is to be read in conjunction with IEC 60269-1:2006.

Fusibles basse tension - Partie 2: Exigences supplémentaires pour les fusibles destinés à être utilisés par des personnes habilitées (fusibles pour usages essentiellement industriels) - Exemples de systèmes de fusibles normalisés A à K

La CEI 60269-2:2013 fournit des exigences supplémentaires pour les fusibles destinés à être utilisés par des personnes habilitées et sont généralement conçus pour usage dans des installations où les éléments de remplacement ne sont accessibles qu'à des personnes habilitées, et ne peuvent être remplacés que par elles. Sauf indication contraire dans cette norme, les fusibles destinés à être utilisés par des personnes habilitées et correspondant aux systèmes de fusibles suivant satisfont également aux exigences des paragraphes correspondants de la CEI 60269-1. La présente norme est divisée en systèmes de fusibles traitant chacun d'un exemple spécifique de fusibles normalisés destinés à être utilisés par des personnes habilitées:
- Système de fusibles A: Fusibles avec éléments de remplacement à couteaux (système de fusibles NH),
- Système de fusibles B: Fusibles avec éléments de remplacement à couteaux avec percuteur (système de fusibles NH),
- Système de fusibles C: Réglettes à fusible (système de fusibles NH),
- Système de fusibles D: Socles pour montage sur jeu de barres (système de fusibles NH),
- Système de fusibles E: Fusibles avec éléments de remplacement à platines (système de fusibles à platines BS),
- Système de fusibles F: Fusibles avec éléments de remplacement à capsules cylindriques (système de fusibles cylindriques NF),
- Système de fusibles G: Fusibles avec éléments de remplacement à couteaux déportés (système de fusibles à pattes d'attache BS),
- Système de fusibles H: Fusibles dont les éléments de remplacement ont des caractéristiques "gD" et "gN" (types de fusibles temporisés ou non temporisés de classe J et de classe L),
- Système de fusibles I: Eléments de remplacement gU à contacts de serrage à encoche,
- Système de fusibles J: Fusibles dont les éléments de remplacement ont des caractéristiques "gD de classe CC" et "gN de classe CC" (types de fusibles temporisés et non temporisés de classe CC),
- Système de fusibles K: Eléments de remplacement gK à couteaux pour raccordement boulonnés - Eléments de remplacement de courants assignés élevés de 1250 A à 4 800 A (master fusibles). Cette cinquième édition de la CEI 60269-2 annule et remplace la quatrième édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
1. systèmes de fusibles A et B: modification des valeurs de puissance dissipée des éléments de remplacement des NH aM;
2. systèmes de fusibles A et B: introduction des dimensions r des éléments de remplacement NH;
3. ajout d'un nouveau système de fusibles K: éléments de remplacement gK à couteaux pour raccordement boulonné. Mots clés: systèmes de fusibles normalisés A à K, exigences supplémentaires pour les fusibles
Cette publication doit être lue conjointement avec la CEI 60269-1:2006.

General Information

Status
Published
Publication Date
18-Jun-2024
Technical Committee
Drafting Committee
Current Stage
PPUB - Publication issued
Start Date
31-Jul-2013
Completion Date
11-Jul-2013
Ref Project

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IEC 60269-2:2013+AMD1:2016+AMD2:2024 CSV - 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 Released:6/19/2024 Isbn:9782832292471
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IEC 60269-2:2013 - 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
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IEC 60269-2:2013+AMD1:2016 CSV - 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 Released:8/5/2016 Isbn:9782832235362
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IEC 60269-2 ®
Edition 5.2 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
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
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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IEC 60269-2 ®
Edition 5.2 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
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
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.50 ISBN 978-2-8322-9247-1
REDLINE VERSION – 2 – IEC 60269-2:2013+AMD1:2016
+AMD2:2024 CSV © IEC 2024
CONTENTS
FOREWORD . 15
INTRODUCTION . 17
1 General scope . 18
1.1 Scope . 18
1.2 Normative references . 18

Fuse system A – Fuses with fuse-links with blade contacts (NH fuse system) . 20
1 General . 20
1.1 Scope . 20
2 Terms and definitions . 20
3 Conditions for operation in service. 21
4 Classification . 21
5 Characteristics of fuses . 21
5.2 Rated voltage . 21
5.3.1 Rated current of the fuse-link. 21
5.3.2 Rated current of the fuse-holder . 21
5.5 Rated power dissipation of a fuse-link and rated acceptable power
dissipation of a fuse-holder . 21
5.6 Limits of time-current characteristics . 21
5.6.1 Time-current characteristics, time-current zones and overload curves . 21
5.6.2 Conventional times and currents . 21
5.6.3 Gates . 22
5.7.2 Rated breaking capacity . 22
6 Markings . 22
6.1 Markings of fuse-holders . 22
6.2 Markings of fuse-links. 23
7 Standard conditions for construction . 23
7.1 Mechanical design . 23
7.1.2 Connections, including terminals . 23
7.1.3 Fuse-contacts . 24
7.1.6 Construction of fuse-bases . 24
7.1.7 Construction of a fuse-link . 24
7.2 Insulating properties and suitability for insulation . 25
7.7 I t characteristics . 25
7.8 Overcurrent discrimination of fuse-links . 26
7.9 Protection against electric shock . 26
8 Tests . 27
8.1.4 Arrangement of the fuse and dimensions . 27
8.1.6 Testing of fuse-holders . 27
8.2.4 Acceptability of test results . 28
8.2.5 Resistance to tracking . 28
8.3 Verification of temperature rise and power dissipation . 28
8.3.1 Arrangement of the fuse and dimensions . 28
8.3.2 Measurement of the temperature rise . 28
8.5.5 Test method . 29

+AMD2:2024 CSV © IEC 2024
8.5.8 Acceptability of test results .
8.7.4 Verification of overcurrent discrimination selectivity . 30
8.9 Verification of resistance to heat . 31
8.9.1 Fuse-base . 32
8.9.2 Fuse-links with gripping-lugs of moulded material or of metal fixed in
moulded material . 32
8.10 Verification of non-deterioration of contacts . 33
8.10.1 Arrangement of the fuse . 33
8.10.2 Test method . 35
8.10.3 Acceptability of test results . 36
8.11 Mechanical and miscellaneous tests . 38
FIGURES . 41
Annex AA (informative) Special test for cable overload protection . 61
AA.1 Arrangement of the fuse . 61
AA.2 Test method and acceptability of test results . 61

Fuse system B – Fuses with striker fuse-links with blade contacts (NH fuse
system) . 62
1.1 Scope . 62
5.2 Rated voltage . 62
5.3.1 Rated current of the fuse-link. 63
5.3.2 Rated current of the fuse-holder . 63
5.5 Rated power dissipation of a fuse-link and rated acceptable power

dissipation of a fuse-holder . 63
5.6 Limits of time-current characteristics . 63
5.7.2 Rated breaking capacity . 63
7.1 Mechanical design . 63
7.1.2 Connections, including terminals . 63
7.1.3 Fuse-contacts . 63
7.1.7 Construction of a fuse-link . 64
7.2 Insulating properties and suitability for insulation . 64
7.7 I t characteristics . 64
7.8 Overcurrent discrimination of "gG" fuse-links . 64
7.9 Protection against electric shock . 64
8.1.6 Testing of fuse-holders . 64
8.3 Verification of temperature rise and power dissipation . 64
8.7.4 Verification of overcurrent discrimination . 65
8.9 Verification of resistance to heat . 65
8.9.1 Fuse-base . 65
FIGURES . 67

Fuse system C – Fuse-rails (NH fuse system) . 74
1.1 Scope . 74
5.2 Rated voltage . 74
5.3.2 Rated current . 74
5.5.1 Rated acceptable power dissipation . 74
7.1 Mechanical design . 75
7.1.2 Connections, including terminals . 75

REDLINE VERSION – 4 – IEC 60269-2:2013+AMD1:2016
+AMD2:2024 CSV © IEC 2024
7.2 Insulating properties . 75
8.1.6 Testing of fuse-holders . 75
8.3 Verification of temperature rise and power dissipation . 76
8.3.1 Arrangement of the fuse . 76
8.9 Verification of resistance to heat . 77
8.9.1 Fuse-base . 77
8.10 Verification o
...


IEC 60269-2 ®
Edition 5.0 2013-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
Fusibles basse tension –
Partie 2: Exigences supplémentaires pour les fusibles destinés à être utilisés par
des personnes habilitées (fusibles pour usages essentiellement industriels) –
Exemples de systèmes de fusibles normalisés A à K

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
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
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International Standards for all electrical, electronic and related technologies.

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IEC 60269-2 ®
Edition 5.0 2013-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
Fusibles basse tension –
Partie 2: Exigences supplémentaires pour les fusibles destinés à être utilisés par

des personnes habilitées (fusibles pour usages essentiellement industriels) –

Exemples de systèmes de fusibles normalisés A à K

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XH
ICS 29.120.50 ISBN 978-2-8322-0898-4

– 2 – 60269-2 © IEC:2013
CONTENTS
FOREWORD . 16
INTRODUCTION . 18
1 General scope . 19
1.1 Scope . 19
1.2 Normative references . 20

Fuse system A – Fuses with fuse-links with blade contacts (NH fuse system) . 21
1 General . 21
1.1 Scope . 21
2 Terms and definitions . 21
3 Conditions for operation in service. 22
4 Classification . 22
5 Characteristics of fuses . 22
5.2 Rated voltage . 22
5.3.1 Rated current of the fuse-link. 22
5.3.2 Rated current of the fuse-holder . 22
5.5 Rated power dissipation of a fuse-link and rated acceptable power
dissipation of a fuse-holder . 22
5.6 Limits of time-current characteristics . 22
5.6.1 Time-current characteristics, time-current zones and overload curves . 22
5.6.2 Conventional times and currents . 22
5.6.3 Gates . 23
5.7.2 Rated breaking capacity . 23
6 Markings . 23
6.1 Markings of fuse-holders . 23
6.2 Markings of fuse-links. 24
7 Standard conditions for construction . 24
7.1 Mechanical design . 24
7.1.2 Connections, including terminals . 24
7.1.3 Fuse-contacts . 25
7.1.6 Construction of fuse-bases . 25
7.1.7 Construction of a fuse-link . 25
7.2 Insulating properties and suitability for insulation . 26
7.7 I t characteristics . 26
7.8 Overcurrent discrimination of fuse-links . 27
7.9 Protection against electric shock . 27
8 Tests . 28
8.1.4 Arrangement of the fuse and dimensions . 28
8.1.6 Testing of fuse-holders . 28
8.2.4 Acceptability of test results . 29
8.2.5 Resistance to tracking . 29
8.3 Verification of temperature rise and power dissipation . 29
8.3.1 Arrangement of the fuse . 29
8.3.2 Measurement of the temperature rise . 29
8.5.5 Test method . 30

60269-2 © IEC:2013 – 3 –
8.5.8 Acceptability of test results . 31
8.7.4 Verification of overcurrent discrimination . 31
8.9 Verification of resistance to heat . 32
8.9.1 Fuse-base . 33
8.9.2 Fuse-links with gripping-lugs of moulded material or of metal fixed in
moulded material . 33
8.10 Verification of non-deterioration of contacts . 34
8.10.1 Arrangement of the fuse . 34
8.10.2 Test method . 36
8.10.3 Acceptability of test results . 37
8.11 Mechanical and miscellaneous tests . 39
FIGURES . 42
Annex AA (informative) Special test for cable overload protection . 61
AA.1 Arrangement of the fuse . 61
AA.2 Test method and acceptability of test results . 61

Fuse system B – Fuses with striker fuse-links with blade contacts (NH fuse
system) . 62
1 General . 62
1.1 Scope . 62
2 Terms and definitions . 62
3 Conditions for operation in service. 62
4 Classification . 62
5 Characteristics of fuses . 62
5.2 Rated voltage . 62
5.3.1 Rated current of the fuse-link. 63
5.3.2 Rated current of the fuse-holder . 63
5.5 Rated power dissipation of a fuse-link and rated acceptable power
dissipation of a fuse-holder . 63
5.6 Limits of time-current characteristics . 63
5.7.2 Rated breaking capacity . 63
6 Markings .
...


IEC 60269-2 ®
Edition 5.1 2016-08
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
Fusibles basse tension –
Partie 2: Exigences supplémentaires pour les fusibles destinés à être utilisés par
des personnes habilitées (fusibles pour usages essentiellement industriels) –
Exemples de systèmes de fusibles normalisés A à K

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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et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
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About the IEC
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International Standards for all electrical, electronic and related technologies.

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IEC 60269-2 ®
Edition 5.1 2016-08
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
Fusibles basse tension –
Partie 2: Exigences supplémentaires pour les fusibles destinés à être utilisés par

des personnes habilitées (fusibles pour usages essentiellement industriels) –

Exemples de systèmes de fusibles normalisés A à K

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-3536-2

colour
inside
IEC 60269-2 ®
Edition 5.1 2016-08
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
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
Fusibles basse tension –
Partie 2: Exigences supplémentaires pour les fusibles destinés à être utilisés par
des personnes habilitées (fusibles pour usages essentiellement industriels) –
Exemples de systèmes de fusibles normalisés A à K

– 2 – IEC 60269-2:2013+AMD1:2016 CSV
© IEC 2016
CONTENTS
FOREWORD. 16
INTRODUCTION . 18
1 General scope . 19
1.1 Scope. 19
1.2 Normative references . 19

Fuse system A – Fuses with fuse-links with blade contacts (NH fuse system) . 21
1 General . 21
1.1 Scope. 21
2 Terms and definitions . 21
3 Conditions for operation in service . 22
4 Classification . 22
5 Characteristics of fuses . 22
5.2 Rated voltage . 22
5.3.1 Rated current of the fuse-link . 22
5.3.2 Rated current of the fuse-holder . 22
5.5 Rated power dissipation of a fuse-link and rated acceptable power
dissipation of a fuse-holder . 22
5.6 Limits of time-current characteristics . 22
5.6.1 Time-current characteristics, time-current zones and overload curves . 22
5.6.2 Conventional times and currents . 22
5.6.3 Gates . 23
5.7.2 Rated breaking capacity . 23
6 Markings . 23
6.1 Markings of fuse-holders . 23
6.2 Markings of fuse-links . 24
7 Standard conditions for construction . 24
7.1 Mechanical design . 24
7.1.2 Connections, including terminals . 24
7.1.3 Fuse-contacts . 25
7.1.6 Construction of fuse-bases . 25
7.1.7 Construction of a fuse-link . 25
7.2 Insulating properties and suitability for insulation . 26
7.7 I t characteristics . 26
7.8 Overcurrent discrimination of fuse-links . 27
7.9 Protection against electric shock . 27
8 Tests . 28
8.1.4 Arrangement of the fuse and dimensions . 28
8.1.6 Testing of fuse-holders . 28
8.2.4 Acceptability of test results . 29
8.2.5 Resistance to tracking . 29
8.3 Verification of temperature rise and power dissipation . 29
8.3.1 Arrangement of the fuse . 29
8.3.2 Measurement of the temperature rise . 29
8.5.5 Test method . 30

© IEC 2016
8.5.8 Acceptability of test results . 31
8.7.4 Verification of overcurrent discrimination . 31
8.9 Verification of resistance to heat . 32
8.9.1 Fuse-base . 33
8.9.2 Fuse-links with gripping-lugs of moulded material or of metal fixed in
moulded material . 33
8.10 Verification of non-deterioration of contacts . 34
8.10.1 Arrangement of the fuse . 34
8.10.2 Test method . 36
8.10.3 Acceptability of test results . 37
8.11 Mechanical and miscellaneous tests . 39
FIGURES . 42
Annex AA (informative) Special test for cable overload protection . 62
AA.1 Arrangement of the fuse . 62
AA.2 Test method and acceptability of test results .
...

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