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SIST EN 60269-1:2007
01-november-2007
1DGRPHãþD
SIST EN 60269-1:2000
SIST EN 60269-1:2000/A1:2006
SIST EN 60269-2:1995
SIST EN 60269-2:1995/A1:1999
SIST EN 60269-2:1995/A2:2003
SIST EN 60269-3:1995
SIST EN 60269-3:1995/A1:2004
Nizkonapetostne varovalke – 1. del: Splošne zahteve (IEC 60269-1:2006)
Low-voltage fuses -- Part 1: General requirements (IEC 60269-1:2006)
Niederspannungssicherungen -- Teil 1: Allgemeine Anforderungen (IEC 60269-1:2006)
Fusibles basse tension -- Partie 1: Exigences générales (IEC 60269-1:2006)
Ta slovenski standard je istoveten z: EN 60269-1:2007
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
SIST EN 60269-1:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 60269-1
NORME EUROPÉENNE
May 2007
EUROPÄISCHE NORM
ICS 29.120.50 Supersedes EN 60269-1:1998 + A1:2005, partially supersedes EN 60269-2:1995 + A1:1998 +
A2:2002 and EN 60269-3:1995 + A1:2003
English version
Low-voltage fuses -
Part 1: General requirements
(IEC 60269-1:2006)
Fusibles basse tension - Niederspannungssicherungen -
Partie 1: Exigences générales Teil 1: Allgemeine Anforderungen
(CEI 60269-1:2006) (IEC 60269-1:2006)
This European Standard was approved by CENELEC on 2007-03-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60269-1:2007 E
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EN 60269-1:2007 - 2 -
Foreword
The text of document 32B/483/FDIS, future edition 4 of IEC 60269-1, prepared by SC 32B, Low-voltage
fuses, of IEC TC 32, Fuses, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60269-1 on 2007-03-01.
This European Standard supersedes EN 60269-1:1998 + A1:2005, it also partially supersedes
EN 60269-2:1995 + A1:1998 + A2:2004 and EN 60269-3:1995 + A1:2003.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-03-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60269-1:2006 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60127 NOTE Harmonized in EN 60127 series (not modified).
IEC 60947-3 NOTE Harmonized as EN 60947-3:1999 (not modified).
__________
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- 3 - EN 60269-1:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1)
IEC 60038 (mod) 1983 IEC standard voltages HD 472 S1 1989
+ corr. February 2002
IEC 60050-441 1984 International Electrotechnical Vocabulary - -
A1 2000 (IEV) -
Chapter 441: Switchgear, controlgear and
fuses
2) 3)
IEC 60269-2 - Low-voltage fuses - HD 60269-2 2007
Part 2: Supplementary requirements for fuses
for use by authorized persons (fuses mainly
for industrial application) - Examples of
standardized systems of fuses A to I
2) 3)
IEC 60269-3 - Low-voltage fuses - HD 60269-3 2007
Part 3: Supplementary requirements for fuses
for use by unskilled persons (fuses mainly for
household or similar applications) - Examples
of standardized systems of fuses A to F
2) 3)
IEC 60269-4 - Low-voltage fuses - EN 60269-4 2007
Part 4: Supplementary requirements for fuse-
links for the protection of semiconductor
devices
IEC 60364-3 (mod) 1993 Electrical installations of buildings - HD 384.3 S2 1995
Part 3: Assessment of general characteristics
IEC 60364-5-52 2001 Electrical installations of buildings - - -
Part 5-52: Selection and erection of electrical
equipment - Wiring systems
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993
1)
The title of HD 472 S1 is: Nominal voltages for low voltage public electricity supply systems.
2)
Undated reference.
3)
Valid edition at date of issue.
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EN 60269-1:2007 - 4 -
Publication Year Title EN/HD Year
IEC 60584-1 1995 Thermocouples - EN 60584-1 1995
Part 1: Reference tables
IEC 60617 data- Graphical symbols for diagrams - -
base
IEC 60664-1 1992 Insulation coordination for equipment within
+ A1 2000 low-voltage systems -
+ A2 2002 Part 1: Principles, requirements and tests EN 60664-1 2003
4)
IEC 60695-2-1/0 1994 Fire hazard testing - EN 60695-2-1/0 1996
Part 2: Test methods - Section 1/sheet 0:
Glow-wire test methods - General
5)
IEC 60695-2-1/1 1994 Fire hazard testing - EN 60695-2-1/1 1996
Part 2: Test methods -
Section 1/sheet 1: Glow-wire end-product test
and guidance
6)
IEC 60695-2-1/2 1994 Fire hazard testing - EN 60695-2-1/2 1996
Part 2: Test methods -
Section 1/sheet 2: Glow-wire flammability test
on materials
7)
IEC 60695-2-1/3 1994 Fire hazard testing - EN 60695-2-1/3 1996
Part 2: Test methods -
Section 1/sheet 3: Glow-wire ignitability test
on materials
ISO 3 1973 Preferred numbers - Series of preferred - -
numbers
ISO 478 1974 Paper - Untrimmed stock sizes for the ISO-A - -
series - ISO primary range
ISO 593 1974 Paper - Untrimmed stock size for the ISO-A - -
series - ISO supplementary range
ISO 4046 1978 Paper, board, pulp and related terms - - -
Vocabulary
4)
EN 60695-2-1/0 is superseded by EN 60695-2-10:2001, which is based on IEC 60695-2-10:2000.
5)
EN 60695-2-1/1 is superseded by EN 60695-2-11:2001, which is based on IEC 60695-2-11:2000.
6)
EN 60695-2-1/2 is superseded by EN 60695-2-12:2001, which is based on IEC 60695-2-12:2000.
7)
EN 60695-2-1/3 is superseded by EN 60695-2-13:2001, which is based on IEC 60695-2-13:2000.
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INTERNATIONAL IEC
STANDARD 60269-1
Fourth edition
2006-11
Low-voltage fuses –
Part 1:
General requirements
” IEC 2006 Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: [email protected] Web:
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For price, see current catalogue
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60269-1 ¤ IEC:2006 – 3 –
CONTENTS
FOREWORD.9
INTRODUCTION.13
1 General .15
1.1 Scope and object.15
1.2 Normative references .17
2 Terms and definitions .19
2.1 Fuses and their component parts .19
2.2 General terms.21
2.3 Characteristic quantities .27
3 Conditions for operation in service .33
3.1 Ambient air temperature (T ) .33
a
3.2 Altitude.33
3.3 Atmospheric conditions.33
3.4 Voltage.35
3.5 Current.35
3.6 Frequency, power factor and time constant .35
3.7 Conditions of installation.35
3.8 Utilization category .35
3.9 Discrimination of fuse-links .37
4 Classification .37
5 Characteristics of fuses .37
5.1 Summary of characteristics.37
5.2 Rated voltage .39
5.3 Rated current .39
5.4 Rated frequency (see 6.1 and 6.2) .39
5.5 Rated power dissipation of a fuse-link and rated acceptable power dissipation
of a fuse-holder .41
5.6 Limits of time-current characteristics.41
5.7 Breaking range and breaking capacity.45
2
5.8 Cut-off current and I t characteristics.47
6 Markings.47
6.1 Markings of fuse-holders .47
6.2 Markings of fuse-links.49
6.3 Marking symbols.49
7 Standard conditions for construction .49
7.1 Mechanical design .49
7.2 Insulating properties and suitability for isolation.51
7.3 Temperature rise, power dissipation of the fuse-link and acceptable power
dissipation of a fuse-holder .53
7.4 Operation .55
7.5 Breaking capacity .57
7.6 Cut-off current characteristic.57
2
7.7 I t characteristics .57
7.8 Overcurrent discrimination of fuse-links .59
7.9 Protection against electric shock.59
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60269-1 ¤ IEC:2006 – 5 –
7.10 Resistance to heat.65
7.11 Mechanical strength.65
7.12 Resistance to corrosion .65
7.13 Resistance to abnormal heat and fire .65
7.14 Electromagnetic compatibility.65
8 Tests .67
8.1 General .67
8.2 Verification of the insulating properties and of the suitability for isolation .77
8.3 Verification of temperature rise and power dissipation.81
8.4 Verification of operation .87
8.5 Verification of the breaking capacity.97
8.6 Verification of the cut-off current characteristics. 109
2
8.7 Verification of I t characteristics and overcurrent discrimination . 109
8.8 Verification of the degree of protection of enclosures . 111
8.9 Verification of resistance to heat . 111
8.10 Verification of non-deterioration of contacts . 111
8.11 Mechanical and miscellaneous tests . 113
Annex A (informative) Measurement of short-circuit power factor. 139
2
Annex B (informative) Calculation of pre-arcing I t values for "gG", "gM", “gD” and
2
“gN” fuse-links and calculation of operating I t values at reduced voltage. 145
Annex C (informative) Calculation of cut-off current-time characteristic. 149
Annex D (informative) Effect of change of ambient temperature and surroundings on
the performance of fuse-links . 157
Figure 1 – Diagram illustrating the means of verification of the time-current
characteristic, using the results of the tests at the "gate" currents (example). 121
Figure 2 – Overload curve and time-current characteristic for "a" fuse-links . 123
Figure 3 – Time current zone for aM fuses. 125
Figure 4 – General presentation of the cut-off characteristics for a series of a.c. fuse-
links. 127
Figure 5 – Typical diagram of the circuit used for breaking capacity test (see 8.5). 129
Figure 6 – Interpretation of oscillograms taken during the a.c. breaking-capacity tests
(see 8.5.7) . 131
Figure 7 – Interpretation of oscillograms taken during the d.c. breaking-capacity tests
(see 8.5.7) . 133
Figure 8 – Glow-wire and position of the thermocouple . 135
Figure 9 –Test apparatus (example) . 137
Figure A.1 – Determination of circuit-impedance for calculation of power factor in
accordance with method I. 143
Figure C.1 – Cut-off current characteristic as a function of actual pre-arcing time . 155
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60269-1 ¤ IEC:2006 – 7 –
Table 1 – Standard values of a.c. rated voltages for fuses .39
Table 2 – Conventional time and current for "gG" and "gM" fuse-links .43
a
Table 3 – Gates for specified pre-arcing times of "gG" and "gM" fuse-links .43
Table 4 – Gates for "aM ' fuse-links (all rated currents).45
Table 5 – Temperature rise limits ΔT = (T – T ) for contacts and terminals .53
a
Table 6 – Maximum arc voltage.57
2
Table 7 – Pre-arcing I t values at 0,01 s for "gG" and "gM" fuse-links .59
Table 8 – Rated impulse withstand voltage .61
Table 9 – Minimum clearances in air .61
Table 10 – Minimum creepage distances .63
Table 11 – Survey of complete tests on fuse-links and number of fuse-links to be tested .71
Table 12 – Survey of tests on fuse-links of smallest rated current of homogeneous
series and number of fuse-links to be tested.73
Table 13 – Survey of tests on fuse-links of rated currents between the largest and the
smallest rated current of a homogeneous series and number of fuse-links to be tested .75
Table 14 – Survey of complete tests on fuse-holders and number of fuse-holders to be
tested .75
Table 15 – Test voltage.79
Table 16 – Test voltage across the poles for the verification of the suitability for isolation .81
Table 17 – Cross-sectional area of copper conductors for tests corresponding to
Subclauses 8.3 and 8.4 .85
Table 18 – Cross-section areas of the copper conductors for the test of “aM” fuses .91
Table 19 – Table for test in Subclause 8.4.3.5 .95
Table 20 – Values for breaking-capacity tests on a.c. fuses . 101
Table 21 – Values for breaking capacity tests on d.c. fuses . 103
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60269-1 ¤ IEC:2006 – 9 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
LOW-VOLTAGE FUSES –
Part 1: General requirements
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 accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60269-1 has been prepared by subcommittee 32B: Low-voltage
fuses, of IEC technical committee 32: Fuses.
This fourth edition cancels and replaces the third edition published in 1998 and amendment 1
(2005), as well as parts of IEC 60269-2 (1986) and IEC 60269-3 (1987) and constitutes a minor
revision.
The general re-organization of the IEC 60269 series has led to the creation of this new edition.
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60269-1 ¤ IEC:2006 – 11 –
The text of this standard is based on following documents:
FDIS Report on voting
32B/483/FDIS 32B/490/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
IEC 60269 consists of the following parts, under the general title Low-voltage fuses:
Part 1: General requirements
NOTE This part includes IEC 60269-1 (third edition, 1998) and parts of IEC 60269-2 (second edition,
1986) and IEC 60269-3 (second edition, 1987).
Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly for
industrial application) – Examples of standardized systems of fuses A to I
NOTE This part includes parts of IEC 60269-2 (second edition, 1986) and all of IEC 60269-2-1 (fourth
edition, 2004).
Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for
household or similar application) – Examples of standardized systems of fuses A to F
NOTE This part includes parts of IEC 60269-3 (second edition, 1987) and all of IEC 60269-3-1 (second
edition, 2004).
Part 4: Supplementary requirements for fuse-links for the protection of semiconductor devices
NOTE This part includes IEC 60269-4 (third edition, 1986) and IEC 60269-4-1 (first edition, 2002).
Part 5: Guidance for the application of low-voltage fuses
NOTE Currently IEC/TR 61818 (2003).
For reasons of convenience, when a part of this publication has come from other publications,
a remark to this effect has been inserted in the text.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site 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.
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60269-1 ¤ IEC:2006 – 13 –
INTRODUCTION
A reorganization of the different parts of the IEC 60269 series has been carried out, in order to
simplify its use, especially by the laboratories which test the fuses.
IEC 60269-1, IEC 60269-2, IEC 60269-3 and IEC 60269-3-1 have been integrated into either
the new part 1 or the new parts 2 or 3, according to the subjects considered, so that the
clauses which deal exclusively with “fuses for authorized persons” are separated from the
clauses dealing with “fuses for unauthorized persons”.
As far as IEC 60269-4 and IEC 60269-4-1 are concerned, they have been integrated into the
new part 4 which deals with the fuse-links used for semiconductor protection.
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60269-1 ¤ IEC:2006 – 15 –
LOW-VOLTAGE FUSES –
Part 1: General requirements
1 General
1.1 Scope and object
This part of IEC 60269 is applicable to fuses incorporating enclosed current-limiting fuse-links
with rated breaking capacities of not less than 6 kA, intended for protecting power-frequency
a.c. circuits of nominal voltages not exceeding 1 000 V or d.c. circuits of nominal voltages not
exceeding 1 500 V.
Subsequent parts of this standard, referred to herein, cover supplementary requirements for
such fuses intended for specific conditions of use or applications.
Fuse-links intended to be included in fuse-switch combinations according to IEC 60947-3
should also comply with the following requirements.
NOTE 1 For "a" fuse-links, details of performance (see 2.2.4) on d.c. circuits should be subject to agreement
between user and manufacturer.
NOTE 2 Modifications of, and supplements to, this standard required for certain types of fuses for particular
applications – for example, certain fuses for rolling stock, or fuses for high-frequency circuits – will be covered, if
necessary, by separate standards.
NOTE 3 This standard does not apply to miniature fuses, these being covered by IEC 60127.
The object of this standard is to establish the characteristics of fuses or parts of fuses (fuse-
base, fuse-carrier, fuse-link) in such a way that they can be replaced by other fuses or parts of
fuses having the same characteristics provided that they are interchangeable as far as their
dimensions are concerned. For this purpose, this standard refers in particular to
– the following characteristics of fuses:
ƒ their rated values;
ƒ their insulation;
ƒ their temperature rise in normal service;
ƒ their powe
...