SIST EN 60269-1:2000/A1:2006
(Amendment)Low-voltage fuses -- Part 1: General requirements
Low-voltage fuses -- Part 1: General requirements
This Amandment replaces Clause 2 covering 56 terms and definitions. Introduces the testing method of markings legibility. Complements the requirements concerning the rated withstand impulse voltage of electric fuses, clearances and creepage distances, leakage currents of fuses suitable for isolation. Provides additional constructional requirements for fuses with non-separable fuse-carriers, suitable for isolation, as well as the verification methods of the insulating properties and the suitability for isolation.
Niederspannungssicherungen -- Teil 1: Allgemeine Anforderungen
Fusibles basse tension -- Partie 1: Règles générales
Nizkonapetostne varovalke – 1. del: Splošne zahteve (IEC 60269-1:1998/A1:2005)
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 60269-1:2000/A1:2006
STANDARD
januar 2006
Nizkonapetostne varovalke – 1. del: Splošne zahteve (IEC 60269-
1:1998/A1:2005)
(istoveten EN 60269-1:1998/A1:2005)
Low-voltage fuses - Part 1: General requirements (IEC 60269-1:1998/A1:2005)
ICS 5HIHUHQþQDãWHYLOND
29.120.50
SIST EN 60269-1:2000/A1:2006(en)
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---------------------- Page: 1 ----------------------
EUROPEAN STANDARD EN 60269-1/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2005
ICS 29.120.50
English version
Low-voltage fuses
Part 1: General requirements
(IEC 60269-1:1998/A1:2005)
Fusibles basse tension Niederspannungssicherungen
Partie 1: Règles générales Teil 1: Allgemeine Anforderungen
(CEI 60269-1:1998/A1:2005) (IEC 60269-1:1998/A1:2005)
This amendment A1 modifies the European Standard EN 60269-1:1998; it was approved by CENELEC
on 2005-03-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this amendment 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 amendment 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and 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
© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60269-1:1998/A1:2005 E
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EN 60269-1:1998/A1:2005 - 2 -
Foreword
The text of document 32B/456/FDIS, future amendment 1 to IEC 60269-1:1998, 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 amendment A1 to EN 60269-1:1998 on 2005-03-01.
The following dates were fixed:
– latest date by which the amendment has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-12-01
– latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2008-03-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of amendment 1:2005 to the International Standard IEC 60269-1:1998 was approved by
CENELEC as an amendment to the European Standard without any modification.
__________
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- 3 - EN 60269-1:1998/A1:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
Delete the references to IEC 60291 and IEC 60291A.
Publication Year Title EN/HD Year
Replace the reference to IEC 60364-5-523 by the following:
IEC 60364-5-52 2001 Electrical installations of buildings - -
Part 5-52: Selection and erection of
electrical equipment - Wiring systems
Add:
IEC 60617 database Graphical symbols for diagrams - -
IEC 60664-1 1992 Insulation coordination for equipment
A1 2000 within low-voltage systems
A2 2002 Part 1: Principles, requirements and EN 60664-1 2003
tests
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NORME CEI
INTERNATIONALE IEC
60269-1
INTERNATIONAL
1998
STANDARD
AMENDEMENT 1
AMENDMENT 1
2005-01
Amendement 1
Fusibles basse tension –
Partie 1:
Règles générales
Amendment 1
Low-voltage fuses –
Part 1:
General requirements
IEC 2005 Droits de reproduction réservés Copyright - all rights reserved
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: inmail@iec.ch Web: www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale Q
PRICE CODE
International Electrotechnical Commission
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Pour prix, voir catalogue en vigueur
For price, see current catalogue
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60269-1 Amend. 1 ¤ IEC:2005 – 3 –
FOREWORD
This amendment has been prepared by subcommittee 32B: Low-voltage fuses, of IEC
technical committee 32: Fuses.
The text of this amendment is based on the following documents:
FDIS Report on voting
32B/456/FDIS 32B/460/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 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.
___________
Page 13
1.2 Normative references
Delete the references to IEC 60291 and IEC 60291A.
Add the following new references:
1
IEC 60617 (all parts) [DB] , Graphical symbols for diagrams
IEC 60664-1:2002, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
Replace the reference to IEC 60364-5-523 by the following:
IEC 60364-5-52:2001, Electrical installations of buildings – Part 5-52: Selection and erection
of electrical equipment – Wiring systems
Replace "IEC 60692-2-1/3:1994" by "IEC 60695-2-1/3:1994"
Replace "ISO 3-1973:" by "ISO 3:1973,"
Replace "ISO 478:1974:" by "ISO 478:1974,"
Replace "ISO 593:1974:" by "ISO 593:1974,"
___________
1
"DB" refers to the IEC on-line database.
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60269-1 Amend. 1 ¤ IEC:2005 – 5 –
Page 15
Replace the existing Clause 2 and its subclauses by the following:
2 Terms and definitions
2
NOTE For general definitions concerning fuses, see also IEC 60050-441 .
For the purposes of this document, the following terms and definitions apply.
2.1 Fuses and their component parts
2.1.1
fuse
device that by the fusing of one or more of its specially designed and proportioned
components opens the circuit in which it is inserted by breaking the current when this exceeds
a given value for a sufficient time. The fuse comprises all the parts that form the complete
device
[IEV 441-18-01]
2.1.2
fuse-holder
combination of the fuse-base with its fuse-carrier
NOTE Where, in this standard the term "fuse-holder" is used, it covers fuse-bases and/or fuse-carriers, if no
clearer distinction is necessary.
[IEV 441-18-14]
2.1.2.1
fuse-base (fuse-mount)
fixed part of a fuse provided with contacts and terminals
[IEV 441-18-02]
NOTE Where applicable, covers are considered as part of the fuse-base.
2.1.2.2
fuse-carrier
movable part of a fuse designed to carry a fuse-link
[IEV 441-18-13]
2.1.3
fuse-link
part of a fuse including the fuse-element(s), intended to be replaced after the fuse has
operated
[IEV 441-18-09]
2.1.4
fuse-contact
two or more conductive parts designed to ensure circuit continuity between a fuse-link and the
corresponding fuse-holder
___________
2
IEC 60050-441:1984, International Electrotechnical Vocabulary − Chapter 441: Switchgear, controlgear and fuses
Amendment 1 (2000)
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60269-1 Amend. 1 ¤ IEC:2005 – 7 –
2.1.5
fuse-element
part of the fuse-link designed to melt under the action of current exceeding some definite
value for a definite period of time
[IEV 441-18-08]
NOTE The fuse-link may comprise several fuse-elements in parallel.
2.1.6
indicating device
(indicator)
part of a fuse provided to indicate whether the fuse has operated
[IEV 441-18-17]
2.1.7
striker
mechanical device forming part of a fuse-link which, when the fuse operates, releases the
energy required to cause operation of other apparatus or indicators or to provide interlocking
[IEV 441-18-18]
2.1.8
terminal
conductive part of a fuse provided for electric connection to external circuits
NOTE Terminals may be distinguished according to the kind of circuits for which they are intended (e.g. main
terminal, earth terminal, etc.) and also according to their design (e.g. screw terminal, plug terminal, etc.).
2.1.9
dummy fuse-link
test fuse-link with defined power dissipation and dimensions
2.1.10
test rig
defined test fuse-base
2.1.11
gauge-piece
additional part of a fuse-base intended to achieve a degree of non-interchangeability
2.2 General terms
2.2.1
enclosed fuse-link
fuse-link in which the fuse-element(s) is (are) totally enclosed, so that during operation within
its rating it cannot produce any harmful external effects, e.g. due to development of an arc,
the release of gas or the ejection of flame or metallic particles
[IEV 441-18-12]
2.2.2
current-limiting fuse-link
fuse-link that during and by its operation in a specified current range, limits the current to a
substantially lower value than the peak value of the prospective current
[IEV 441-18-10]
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60269-1 Amend. 1 ¤ IEC:2005 – 9 –
2.2.3
"g" fuse-link (full-range breaking-capacity fuse-link, formerly general purpose fuse-link)
current-limiting fuse-link capable of breaking under specified conditions all currents, which
cause melting of the fuse-element up to its rated breaking capacity
2.2.4
"a" fuse-link (partial-range breaking-capacity fuse-link, formerly back-up fuse-link)
current-limiting fuse-link capable of breaking under specified conditions all currents between
the lowest current indicated on its operating time-current characteristic (k I in Figure 2) and
2 n
its rated breaking capacity
NOTE "a" fuse-links are generally used to provide short-circuit protection. Where protection is required against
over-currents less than k I in Figure 2, they are used in conjunction with another suitable switching device
2 n
designed to interrupt such small over-currents.
2.2.5
temperatures
2.2.5.1
ambient air temperature
T
a
temperature of the air surrounding the fuse (at a distance of about 1 m from the fuse or its
enclosure, if any)
2.2.5.2
fluid environment temperature
T
e
temperature of the fluid cooling the fuse-components (contact, terminal, etc.). It is the sum of
the ambient air temperature T and the temperature rise ∆T with respect to the ambient
a e
temperature of the internal fluid in contact with the fuse-components (contact, terminal, etc.) if
the latter is in an enclosure. If it is not in an enclosure, it is assumed that T is equal to T
e a
2.2.5.3
fuse-component temperature
T
fuse-component (contact, terminal, etc.) temperature T is that of the relevant part
2.2.6
overcurrent discrimination
co-ordination of the relevant characteristics of two or more overcurrent protective devices
such that, on the occurrence of overcurrents within stated limits, the device intended to
operate within these limits does so, while the other(s) do(es) not
2.2.7
fuse-system
family of fuses following the same physical design principles with respect to the shape of the
fuse-links, type of contact, etc.
2.2.8
size
specified set of dimensions of fuses within a fuse-system. Each individual size covers a given
range of rated currents for which the specified dimensions of the fuses remain unchanged
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60269-1 Amend. 1 ¤ IEC:2005 – 11 –
2.2.9
homogeneous series of fuse-links
series of fuse-links, within a given size, deviating from each other only in such characteristics
that for a given test, the testing of one or a reduced number of particular fuse-links of that
series may be taken as representative for all the fuse-links of the homogeneous series
NOTE The characteristics by which the fuse-links of a homogeneous series may deviate and details on which of
the fuse-links should be tested are specified in association with the tests concerned (see Tables 7B and 7C).
[IEV 441-18-34, modified]
2.2.10
utilization category (of a fuse link)
combination of specified requirements related to the conditions in which the fuse-link fulfils its
purpose, selected to represent a characteristic group of practical applications (see 5.7.1)
2.2.11
fuses for use by authorized persons (formerly called fuses for industrial application)
fuses intended to be used in installations where the fuse-links are accessible to and intended
to be replaced by authorized persons only
NOTE 1 Non-interchangeability and protection against accidental contact with live parts need not necessarily be
ensured by constructional means.
*
NOTE 2 Authorized person is understood to have the meaning defined for categories BA 4 "Instructed " and BA 5
**
"Skilled " in IEC 60364-3.
2.2.12
fuses for use by unskilled persons (formerly called fuses for domestic and similar
applications)
fuses intended to be used in installations where the fuse-links are accessible to and can be
replaced by unskilled persons
NOTE For these fuses protection against direct contact with live parts is recommended and non-interchangeability
may be required, if necessary.
2.2.13
non-interchangeability
limitations on shape and/or dimensions with the object of avoiding in a specific fuse-base the
inadvertent use of fuse-links having electrical properties other than those ensuring the desired
degree of protection
[IEV 441-18-33]
2.3 Characteristic quantities
2.3.1
rating
general term employed to designate the characteristic values that together define the working
conditions upon which the tests are based and for which the equipment is designed
___________
*
Instructed: persons adequately advised or supervised by skilled persons to enable them to avoid dangers which
electricity may create (operating and maintenance staff).
**
Skilled: persons with technical knowledge or sufficient experience to enable them to avoid dangers which
electricity may create (engineers and technicians).
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60269-1 Amend. 1 ¤ IEC:2005 – 13 –
NOTE Rated values usually stated for low-voltage fuses are: voltage, current, breaking capacity, power
dissipation and acceptable power dissipation and frequency, where applicable. In the case of a.c., rated voltage
and rated current are stated as r.m.s. symmetrical values; in the case of d.c., when ripple is present, the rated
voltage is stated as a mean value, the rated current as an r.m.s. value. The above applies to any value of voltage
and current, if not indicated otherwise.
2.3.2
prospective current (of a circuit and with respect to a fuse)
current that would flow in the circuit if each pole of the fuse were replaced by a conductor of
negligible impedance
For a.c., the prospective current is expressed by the r.m.s. value of the a.c. component.
NOTE The prospective current is the quantity to which the breaking capacity and characteristics of the fuse are
2
normally referred, e.g. I t and cut-off current characteristics (see 8.5.7).
[IEV 441-17-01, modified]
2.3.3
gates
limiting values within which the characteristics, for example time-current characteristics, are
obtained
2.3.4
breaking capacity of a fuse
value of prospective current that a fuse is capable of breaking at a stated voltage under
prescribed conditions of use and behaviour
[IEV 441-17-08, modified]
2.3.5
breaking range
range of prospective currents within which the breaking capacity of a fuse-link is assured
2.3.6
cut-off current
maximum instantaneous value reached by the current during the breaking operation of a fuse-
link when it operates in such a manner as to prevent the current from reaching the otherwise
attainable maximum
2.3.7
cut-off current characteristic; let-through current characteristic
curve giving the cut-off current as a function of the prospective current under stated
conditions of operation
NOTE In the case of a.c., the values of the cut-off currents are the maximum values which can be reached
whatever the degree of asymmetry. In the case of d.c., the values of the cut-off currents are the maximum values
reached related to the time constants as specified.
[IEV 441-17-14]
2.3.8
peak withstand current (of a fuse-holder)
value of cut-off current that the fuse-holder can withstand
NOTE The peak withstand current is not less than the highest cut-off current of any fuse-link with which the
fuseholder is intended to be associated.
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60269-1 Amend. 1 ¤ IEC:2005 – 15 –
2.3.9
pre-arcing time; melting time
interval of time between the beginning of a current large enough to cause a break in the fuse-
element(s) and the instant when an arc is initiated
[IEV 441-18-21]
2.3.10
arcing time of a fuse
interval of time between the instant of the initiation of the arc in a fuse and the instant of final
arc extinction in that fuse
[IEV 441-17-37]
2.3.11
operating time; total clearing time
sum of the pre-arcing time and the arcing time
[IEV 441-18-22]
2.3.12
2
I t; Joule integral
integral of the square of the current over a given time interval:
t
1
22
It = i dt
³
t
0
2 2
NOTE 1 The pre-arcing I t is the I t integral extended over the pre-arcing time of the fuse.
2 2
NOTE 2 The operating I t is the I t integral extended over the operating time of the fuse.
NOTE 3 The energy in joules released in 1 Ω of resistance in a circuit protected by a fuse is equal to the value of
2 2
the operating I t expressed in A s.
[IEV 441-18-23]
2.3
...
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