IEC 60269-2:2010

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 J

IEC 60269-2:2010 provides fuses for use by authorized persons are generally designed to be used in installations where the fuse-links are accessible to, and may be replaced by, authorized persons only. This standard is divided into fuse systems,(A thru I), each dealing with a specific example of standardized fuses for use by authorized persons. This fourth edition of IEC 60269-2 cancels and replaces the third edition published in 2006 and constitutes a minor revision. This part is to be used in conjunction with IEC 60269-1:2006, Low-voltage fuses - Part 1: General requirements and its Amendment 1 (2009). This Part 2 supplements or modifies the corresponding clauses or subclauses of Part 1. Where no change is necessary, this Part 2 indicates that the relevant clause or subclause applies. Tables and figures which are additional to those in Part 1 are numbered starting from 101. Additional annexes are numbered AA, BB, etc.
This publication is to be read in conjunction with IEC 60269-1:2009.

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 J

La CEI 60269-2:2010 donne les fusibles destinés à être utilisés par des personnes habilitées 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. Cette quatrième édition de la CEI 60269-2 annule et remplace la troisième édition parue en 2006 et constitue une révision mineure. La présente partie doit être utilisée conjointement avec la CEI 60269-1:2006, Fusibles basse tension - Partie 1: Exigences générales et son Amendement 1 (2009). Cette Partie 2 complète ou modifie les articles ou paragraphes correspondant de la Partie 1. Lorsqu'aucune modification n'est nécessaire, la Partie 2 indique que l'article ou le paragraphe approprié est applicable. Les tableaux et les figures qui sont complémentaires à ceux de la Partie 1 sont numérotés à partir de 101. Les annexes complémentaires sont numérotées AA, BB, etc.
Cette publication doit être lue conjointement avec la CEI 60269-1:2009.

General Information

• Status: Published
• Publication Date: 26-Apr-2010
• ICS: 29.100.10 - Magnetic components
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: SC 32B - Low-voltage fuses
• Drafting Committee: MT 8 - TC 32/SC 32B/MT 8
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 11-Jul-2013

Relations

• Revised: 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
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60269-2


®

Edition 4.0 2010-04



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE


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 J

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 J


IEC 60269-2:2010

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THIS PUBLICATION IS COPYRIGHT PROTECTED


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---------------------- Page: 2 ----------------------
IEC 60269-2


®

Edition 4.0 2010-04



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE


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 J

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 J


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XH
CODE PRIX
ICS 29.120.50 ISBN 978-2-88910-087-3
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 60269-2 © IEC:2010


CONTENTS


FOREWORD.14

INTRODUCTION.16


1 General scope .17

1.2 Normative references .18



Fuse system A – Fuses with fuse-links with blade contacts (NH fuse system) .19


1 General .19

1.1 Scope.19
2 Terms and definitions .19
3 Conditions for operation in service.19
4 Classification.20
5 Characteristics of fuses .20
5.2 Rated voltage.20
5.3.1 Rated current of the fuse-link.20
5.3.2 Rated current of the fuse-holder .20
5.5 Rated power dissipation of a fuse-link and rated acceptable power
dissipation of a fuse-holder .20
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 .21
5.7.2 Rated breaking capacity .21
6 Marking .22
6.1 Markings of fuse-holders .22
6.2 Markings of fuse-links.22
7 Standard conditions for construction.22
7.1 Mechanical design.23
7.1.2 Connections, including terminals .23
7.1.3 Fuse-contacts.23
7.1.6 Construction of fuse-bases .23
7.1.7 Construction of a fuse-link .24
7.2 Insulating properties.24

2
7.7 I t characteristics .24
7.8 Overcurrent discrimination of "gG" fuse-links.25
7.9 Protection against electric shock .25
8 Tests .25
8.1.4 Arrangement of the fuse and dimensions .26
8.1.6 Testing of fuse-holders .26
8.2.4 Acceptability of test results.27
8.2.5 Resistance to tracking .27
8.3 Verification of temperature rise and power dissipation.27
8.3.1 Arrangement of the fuse .27
8.3.2 Measurement of the temperature rise .28
8.5.8 Acceptability of test results.29
8.7.4 Verification of overcurrent discrimination .29

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60269-2 © IEC:2010 – 3 –


8.9 Verification of resistance to heat .31

8.9.1 Fuse-base .31

8.9.2 Fuse-links with gripping lugs of moulded material or of metal fixed in

moulded material.31

8.10 Verification of non-deterioration of contacts and direct terminal clamps.32

8.10.1 Arrangement of the fuse .32

8.10.2 Test method .34

8.10.3 Acceptability of test results.35

8.11 Mechanical and miscellaneous tests.36

Annex AA (informative) Special test for cable overload protection.58


Fuse system B – Fuses with striker fuse-links with blade contacts (NH fuse
system) .59
1 General .59
1.1 Scope.59
2 Terms and definitions .59
3 Conditions for operation in service.59
4 Classification.59
5 Characteristics of fuses .59
5.2 Rated voltage.59
5.3.1 Rated current of the fuse-link.59
5.3.2 Rated current of the fuse-holder .60
5.5 Rated power dissipation of a fuse-link and rated acceptable power
dissipation of a fuse-holder .60
5.6 Limits of time-current characteristics .60
5.7.2 Rated breaking capacity .60
6 Marking .60
7 Standard conditions for construction.60
7.1 Mechanical design.60
7.1.2 Connections, including terminals .60
7.1.3 Fuse-contacts.60
7.1.7 Construction of a fuse-link .61
7.2 Insulating properties and suitability for insulation .61
2
7.7 I t characteristics .61

7.8 Overcurrent discrimination of "gG" fuse-links.61
7.9 Protection against electric shock .61
8 Tests .61
8.1.6 Testing of fuse-holders .61
8.3 Verification of temperature rise and power dissipation.61
8.7.4 Verification of overcurrent discrimination .62
8.9 Verification of resistance to heat .62
8.9.1 Fuse-base .62

Fuse system C – Fuse-rails (NH fuse system) .71
1 General .71
1.1 Scope.71
2 Terms and definitions .71

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– 4 – 60269-2 © IEC:2010


3 Conditions for operation in service.71

4 Classification.71


5 Characteristics of fuses .71

5.2 Rated voltage.71

5.3.2 Rated current .71

5.5.1 Rated acceptable power dissipation.71

6 Markings .71

7 Standard conditions for construction.72

7.1 Mechanical design.72

7.1.2 Connections, including terminals .72
7.2 Insulating properties.72
8 Tests .72
8.1.6 Testing of fuse-holders .73
8.3 Verification of temperature rise and power dissipation.73
8.3.1 Arrangement of the fuse .73
8.10 Verification of non-deterioration of contacts and direct terminal clamps.74
8.10.1 Arrangement of the fuse .74

Fuse system D – Fuse-bases for busbar mounting (40 mm system) (NH fuse
system) .79
1 General .79
1.1 Scope.79
2 Terms and definitions .79
3 Conditions for operation in service.79
4 Classification.79
5 Characteristics of fuses .79
5.2 Rated voltage.79
5.3.2 Rated current .79
5.5.2 Rated acceptable power dissipation of tandem fuse-bases .80
6 Markings .80
7 Standard conditions for construction.80
7.1 Mechanical design.80
7.1.2 Connections, including terminals .80

7.1.5 Construction of a fuse-base for busbar mounting .80
7.2 Insulating properties and suitability for insulation .81
8 Tests .81
8.3 Verification of temperature rise and power dissipation.81
8.3.1 Arrangement of the fuse .81
8.9.1 Fuse-base .82
8.10 Verification of non-deterioration of contacts and direct terminal clamps.82
8.10.1 Arrangement of the fuse .82
8.10.2 Test method .82
8.11 Mechanical and miscellaneous tests.82

Fuse system E – Fuses with fuse-links for bolted connections (BS bolted fuse
system) .91
1 General .91

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60269-2 © IEC:2010 – 5 –


1.1 Scope.91

2 Terms and definitions .91


3 Conditions for operation in service.91

4 Classification.91

5 Characteristics of fuses .91

5.3.1 Rated current of the fuse-link.91


5.3.2 Rated current of the fuse-holder .91

5.5 Rated power dissipation of a fuse-link and rated acceptable power

dissipation of a fuse-holder .91

5.6 Limits of time-current characteristics .92
5.6.1 Time-current characteristics, time-current zones and overload curves .92
5.6.2 Conventional times and currents.92
5.6.3 Gates .92
5.7.2 Rated breaking capacity .92
6 Markings .92
6.1 Markings of fuse-holders .92
6.2 Markings of fuse-links.92
7 Standard conditions for construction.93
7.1 Mechanical design.93
7.1.2 Connections including terminals .93
7.2 Insulating properties and suitability for insulation .93
7.9 Protection against electric shock .93
8 Tests .93
8.3 Verification of temperature rise and power dissipation.93
8.3.1 Arrangement of the fuse .93
8.3.3 Measurement of the power dissipation of the fuse-link.93
8.4 Verification of operation .93
8.4.1 Arrangement of the fuse .93
8.5 Verification of breaking capacity.93
8.5.1 Arrangement of the fuse .93
8.5.8 Acceptability of test results.93
8.9 Verification of resistance to heat .94
8.10 Verification of non-deterioration of contacts.94
8.10.1 Arrangement of the fuse .94

8.10.2 Test method .94
8.10.3 Acceptability of the results.94
8.11 Mechanical and miscellaneous tests.94

Fuse system F – Fuses with fuse-links having cylindrical contact caps (NF
cylindrical fuse system) .105
1 General .105
1.1 Scope.105
2 Terms and definitions .105
3 Conditions for operation in service.105
4 Classification.105
5 Characteristics of fuses .105
5.2 Rated voltage.105

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– 6 – 60269-2 © IEC:2010


5.3.1 Rated current of the fuse-link.105

5.3.2 Rated current of the fuse-holder .106

5.5 Rated power dissipation of a fuse-link and rated acceptable power

dissipation of a fuse-holder .106

5.6 Limits of time-current characteristics .107

5.6.1 Time-current characteristics, time-current zones and overload curves .107

5.6.2 Conventional times and currents.107

5.6.3 Gates .107

5.7.2 Rated breaking capacity .107

6 Marking .108

6.1 Markings of fuse-holders .108
6.2 Markings of fuse-links.108
7 Standard conditions for construction.108
7.1 Mechanical design.108
7.1.2 Connections including terminals .108
7.2 Insulating properties and suitability for insulation . 109
2
7.7 I t characteristics .109
7.8 Overcurrent discrimination of "gG" fuse-links.109
7.9 Protection against electric shock .109
8 Tests .110
8.1.6 Testing of fuse-holders .110
8.3.1 Arrangement of the fuse . 110
8.7.4 Verification of overcurrent
...