IEC 60269-1:2006+AMD1:2009 CSV
(Main)Low-voltage fuses - Part 1: General requirements
Low-voltage fuses - Part 1: General requirements
IEC 60269-1:2006+A1:2009 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. This consolidated version consists of the fourth edition (2006) and its amendment 1 (2009). Therefore, no need to order amendment in addition to this publication.
Fusibles basse tension - Partie 1: Exigences générales
La CEI 60269-1:2006+A1:2009 est applicable aux fusibles avec éléments de remplacement limiteurs de courant à fusion enfermée et à pouvoir de coupure égal ou supérieur à 6 kA, destinés à assurer la protection des circuits à courant alternatif à fréquence industrielle dont la tension nominale ne dépasse pas 1 000 V, ou des circuits à courant continu dont la tension nominale ne dépasse pas 1 500 V. Des parties subséquentes, auxquelles la présente norme se réfère, énoncent des exigences supplémentaires applicables aux fusibles prévus pour des conditions d'utilisation ou des applications particulières. Cette version consolidée comprend la quatrième édition (2006) et son amendement 1 (2009). Il n'est donc pas nécessaire de commander l'amendement avec cette publication.
General Information
Standards Content (Sample)
IEC 60269-1
®
Edition 4.1 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage fuses –
Part 1: General requirements
Fusibles basse tension –
Partie 1: Exigences générales
IEC 60269-1:2006+A1:2009
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IEC 60269-1
®
Edition 4.1 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage fuses –
Part 1: General requirements
Fusibles basse tension –
Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CS
CODE PRIX
ICS 29.120.50 ISBN 978-2-88910-086-6
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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CONTENTS
FOREWORD.5
INTRODUCTION.7
1 General .8
1.1 Scope and object.8
1.2 Normative references .9
2 Terms and definitions .10
2.1 Fuses and their component parts .10
2.2 General terms.11
2.3 Characteristic quantities .14
3 Conditions for operation in service .17
3.1 Ambient air temperature (T ) .17
a
3.2 Altitude.17
3.3 Atmospheric conditions.17
3.4 Voltage.18
3.5 Current.18
3.6 Frequency, power factor and time constant .18
3.7 Conditions of installation.18
3.8 Utilization category .18
3.9 Discrimination of fuse-links .19
4 Classification .19
5 Characteristics of fuses .19
5.1 Summary of characteristics.19
5.2 Rated voltage .20
5.3 Rated current .20
5.4 Rated frequency (see 6.1 and 6.2) .20
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
5.7 Breaking range and breaking capacity.23
2
5.8 Cut-off current and I t characteristics .24
6 Markings.24
6.1 Markings of fuse-holders .24
6.2 Markings of fuse-links.25
6.3 Marking symbols.25
7 Standard conditions for construction .25
7.1 Mechanical design .25
7.2 Insulating properties and suitability for isolation.26
7.3 Temperature rise, power dissipation of the fuse-link and acceptable power
dissipation of a fuse-holder .27
7.4 Operation .28
7.5 Breaking capacity .29
7.6 Cut-off current characteristic.29
2
7.7 I t characteristics .29
7.8 Overcurrent discrimination of fuse-links .30
7.9 Protection against electric shock.30
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60269-1 © IEC:2006+A1:2009 – 3 –
7.10 Resistance to heat.33
7.11 Mechanical strength.33
7.12 Resistance to corrosion .33
7.13 Resistance to abnormal heat and fire .33
7.14 Electromagnetic compatibility.33
8 Tests .34
8.1 General .34
8.2 Verification of the insulating properties and of the suitability for isolation .39
8.3 Verification of temperature rise and power dissipation.41
8.4 Verification of operation .44
8.5 Verification of the breaking capacity.49
8.6 Verification of the cut-off current characteristics.55
2
8.7 Verification of I t characteristics and overcurrent discrimination.55
8.8 Verification of the degree of protection of enclosures .56
8.9 Verification of resistance to heat .56
8.10 Verification of non-deterioration of contacts .56
8.11 Mechanical and miscellaneous tests .57
Annex A (informative) Measurement of short-circuit power factor.69
2
Annex B (informative) Calculation of pre-arcing I t values for "gG", "gM", “gD” and “gN”
2
fuse-links and calculation of operating I t values at reduced voltage.72
Annex C (informative) Calculation of cut-off current-time characteristic.74
Annex D (informative) Effect of change of ambient temperature and surroundings
on the performance of fuse-links .78
Annex E (normative) Particular requirements for fuse-bases with screwless-type
terminals for external copper conductors .79
Figure 1 – Diagram illustrating the means of verification of the time-current
characteristic, using the results of the tests at the "gate" currents (example).60
Figure 2 – Overload curve and time-current characteristic for "a" fuse-links .61
Figure 3 – Time current zone for aM fuses.62
Figure 4 – General presentation of the cut-off characteristics for a series
of a.c. fuse-links.63
Figure 5 – Typical diagram of the circuit used for breaking capacity test (see 8.5).64
Figure 6 – Interpretation of oscillograms taken during the a.c. breaking-capacity tests
(see 8.5.7) .65
Figure 7 – Interpretation of oscillograms taken during the d.c. breaking-capacity tests
(see 8.5.7) .66
Figure 8 – Glow-wire and position of the thermocouple .67
Figure 9 –Test apparatus (example) .68
Figure A.1 – Determination of circuit-impedance for calculation of power factor
in accordance with method I .71
Figure C.1 – Cut-off current characteristic as a function of actual pre-arcing time .77
Figure E.1 – Connecting samples .84
Figure E.2 – Examples of terminals .85
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Table 1 – Standard values of a.c. rated voltages for fuses .20
Table 2 – Conventional time and current for "gG" and "gM" fuse-links .22
Table 3 – Gates for specified pre-arcing times of "gG" and "gM" fuse-links .22
Table 4 – Gates for "aM ' fuse-links (all rated currents).23
Table 5 – Temperature rise limits ΔT = (T – T ) for contacts and terminals.27
a
Table 6 – Maximum arc voltage.29
2
Table 7 – Pre-arcing I t values at 0,01 s for "gG" and "gM" fuse-links.30
Table 8 – Rated impulse withstand voltage .31
Table 9 – Minimum clearances in air .31
Table 10 – Minimum creepage distances .32
Table 11 – Survey of complete tests on fuse-links and number of fuse-links to be tested .36
Table 12 – Survey of tests on fuse-links of smallest rated current of homogeneous
series and number of fuse-links to be tested.37
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 .38
Table 14 – Survey of complete tests on fuse-holders and number of fuse-holders
to be tested.38
Table 15 – Test voltage.40
Table 16 – Test voltage across the poles for the verification of the suitability for isolation .41
Table 17 – Cross-sectional area of copper conductors for tests corresponding
to Subclauses 8.3 and 8.4 .43
Table 18 – Cross-section areas of the copper conductors for the test of “aM” fuses .46
Table 19 – Table for test in Subclause 8.4.3.5 .48
Table 20 – Values for breaking-capacity tests on a.c. fuses .51
Table 21 – Values for breaking capacity tests on d.c. fuses .52
Table E.1 – Connectable conductors .81
Table E.2 – Cross-sections of copper conductors connectable to terminals.81
Table E.3 – Pull forces .83
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60269-1 © IEC:2006+A1:2009 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
LOW-VOLTAGE FUSES –
Part 1: General requirements
FOREWORD
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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.
The general re-organization of the IEC 60269 series has led to the creation of this new edition.
This consolidated version of IEC 60269-1 consists of the fourth edition (2006) [documents
32B/483/FDIS and 32B/490/RVD] and its amendment 1 (2009) [documents 32B/534/FDIS and
32B/540/RVD].
The technical content is therefore identical to the base edition and its amendment and has
been prepared for user convenience.
It bears the edition number 4.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
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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 the base publication and its amendments 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+A1:2009 – 7 –
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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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 power dissipation and acceptable power dissipation;
ƒ their time/current characteristics;
ƒ their breaking capacity;
2
ƒ their cut-off current characteristics and their I t characteristics.
– type test for verification of the characteristics of fuses;
– the marking of fuses.
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60269-1 © IEC:2006+A1:2009 – 9 –
1.2 Normative references
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.
IEC 60038:1983, IEC standard voltages
IEC 60050(441):1984, International Electrotechnical Vocabulary (IEV) – Chapter 441:
Switchgear, controlgear and fuses
Amendment 1 (2000)
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 I)
IEC 60269-3, Low-voltage fuses – 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
IEC 60269-4, Low-voltage fuses – Part 4: Supplementary requirements for fuse-links for the
protection of semiconductor devices
IEC 60269-5, Low-voltage fuses – Part 5: Guidance for the application of low-voltage fuses
IEC 60364-3:1993, Electrical installations of buildings – 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 system
IEC 60529:1989, Degrees of protection provided by enclosures (Code IP)
IEC 60584-1:1995, Thermocouples – Part 1: Reference tables
IEC 60617, Graphical symbols for diagrams
IEC 60664-1:2002, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60695-2-10:2000, Fire hazard testing – Part 2: Test methods – Section 1/sheet 0: Glow-
wire test methods – General
IEC 60695-2-11:2000, Fire hazard testing – Part 2: Test methods – Section 1/sheet 1: Glow-
wire end-product test and guidance
IEC 60695-2-12:2000, Fire hazard testing – Part 2: Test methods – Section 1/sheet 2: Glow-
wire flammability test on materials
IEC 60695-2-13:2000, Fire hazard testing – 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 serie
...
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