SIST EN 60127-7:2013
(Main)Miniature fuses - Part 7: Miniature fuse-links for special applications (IEC 60127-7:2013)
Miniature fuses - Part 7: Miniature fuse-links for special applications (IEC 60127-7:2013)
This part of IEC 60127 covers requirements for miniature fuse-links for special applications. It does not apply to fuses completely covered by the subsequent parts of IEC 60269-1. It does not apply to miniature fuse-links for appliances intended to be used under special conditions, such as in corrosive or explosive atmospheres. This standard applies in addition to the requirements of IEC 60127-1. This standard is applicable to fuse-links with a rated voltage not exceeding 1000 V, a rated current not exceeding 20 A and a rated breaking capacity not exceeding 50 kA. Miniature fuse-links for special applications are not intended to be replaced by the end-user of
an electrical / electronic appliance. The object of this standard is to establish uniform test methods for miniature fuse-links for special applications, so as to allow verification of the values (for example melting time and breaking capacity values) specified by the manufacturer.
Geräteschutzsicherungen - Teil 7: G-Sicherungseinsätze für besondere Anwendungen (IEC 60127-7:2013)
Coupe-circuit miniatures - Partie 7: Eléments de remplacement miniatures pour applications spéciales (CEI 60127-7:2013)
La CEI 60127-7:2013 couvre des exigences pour éléments de remplacement miniatures destinés à des applications spéciales. Elle ne s'applique pas aux coupe-circuits complètement couverts par les autres parties de la CEI 60269-1. Elle n'est pas applicable aux éléments de remplacement miniatures placés dans des appareils destinés à être employés dans des conditions particulières, telles qu'atmosphères corrosives ou explosives. La présente norme s'applique en complément des exigences présentées dans la CEI 60127-1. La présente norme est applicable aux éléments de remplacement de tension assignée ne dépassant pas 1 000 V, de courant assigné ne dépassant pas 20 A et de pouvoir de coupure assigné ne dépassant pas 50 kA. Les éléments de remplacement miniatures pour applications spéciales ne sont pas destinés à être remplacés par l'utilisateur final d'un appareil électronique ou électrique. La présente norme a pour objet d'établir des méthodes d'essai uniformes pour des éléments de remplacement miniatures pour applications spéciales, pour permettre de vérifier les valeurs (par exemple la durée de fusion et le pouvoir de coupure) spécifiées par le fabricant. Mots clés: exigences pour éléments de remplacement miniatures
Miniaturne varovalke - 7. del: Miniaturne taljive varovalke za posebne aplikacije (IEC 60127-7:2013)
Ta del standarda IEC 60127 zajema zahteve za miniaturne taljive vložke za posebno uporabo. Ne uporablja se za varovalke, ki so v celoti vključene v nadaljnjih delih standarda IEC 60269-1. Ne velja za miniaturne taljive vložke za aparate, namenjene uporabi pod posebnimi pogoji, npr. v korozivni ali eksplozivni atmosferi. Ta standard se poleg tega uporablja za zahteve iz standarda IEC 60127-1. Ta standard se uporablja za taljive vložke z nazivno napetostjo, ki ne presega 1000 V, nazivnim tokom, ki ne presega 20 A, in nazivno zmogljivostjo prekinitve, ki ne presega 50 kA. Miniaturnih taljivih vložkov za posebno uporabo ne sme zamenjevati končni uporabnik
električnega/elektronskega aparata. Namen tega standarda je vzpostaviti enotne preskusne metode za miniaturne taljive vložke za posebno uporabo, tako da se omogoči preverjanje vrednosti (na primer čas taljenja in vrednosti zmogljivosti prekinitve), ki jih določi proizvajalec.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60127-7:2013
01-september-2013
Miniaturne varovalke - 7. del: Miniaturne taljive varovalke za posebne aplikacije
(IEC 60127-7:2013)
Miniature fuses - Part 7: Miniature fuse-links for special applications (IEC 60127-7:2013)
Geräteschutzsicherungen - Teil 7: G-Sicherungseinsätze für besondere Anwendungen
(IEC 60127-7:2013)
Coupe-circuit miniatures - Partie 7: Eléments de remplacement miniatures pour
applications spéciales (CEI 60127-7:2013)
Ta slovenski standard je istoveten z: EN 60127-7:2013
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
SIST EN 60127-7:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60127-7:2013
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SIST EN 60127-7:2013
EUROPEAN STANDARD
EN 60127-7
NORME EUROPÉENNE
June 2013
EUROPÄISCHE NORM
ICS 29.120.50
English version
Miniature fuses -
Part 7: Miniature fuse-links for special applications
(IEC 60127-7:2013)
Coupe-circuit miniatures - Geräteschutzsicherungen -
Partie 7: Eléments de remplacement Teil 7: G-Sicherungseinsätze für
miniatures pour applications spéciales besondere Anwendungen
(CEI 60127-7:2013) (IEC 60127-7:2013)
This European Standard was approved by CENELEC on 2013-04-24. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60127-7:2013 E
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SIST EN 60127-7:2013
EN 60127-7:2013 - 2 -
Foreword
The text of document 32C/458/CDV, future edition 1 of IEC 60127-7, prepared by SC 32C “Miniature
fuses” of IEC/TC 32 “Fuses” was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 60127-7:2013.
The following dates are fixed:
(dop) 2013-01-24
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2013-04-24
standards conflicting with the
document have to be withdrawn
This standard shall be used in conjunction with EN 60127-1:2006 + A1:2011.
The clauses of this standard supplement, modify or replace the corresponding clauses in EN 60127-1.
Where there is no corresponding clause or subclause in this standard, the clause or subclause of
EN 60127-1 applies without modification as far as is reasonable. When this standard states
“addition”or “replacement”, the relevant text in EN 60127-1 is to be adapted accordingly.
Subclauses which are additional to those in Part 1 are numbered starting from 101. Additional
annexes are numbered AA, BB, etc.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment
Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).
Endorsement notice
The text of the International Standard IEC 60127-7:2013 was approved by CENELEC as a European
Standard without any modification.
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SIST EN 60127-7:2013
- 3 - EN 60127-7:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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
IEC 60068-2-21 2006 Environmental testing - EN 60068-2-21 2006
+ corr. January 2012 Part 2-21: Tests - Test U: Robustness of
terminations and integral mounting devices
IEC 60127-1 2006 Miniature fuses - EN 60127-1 2006
Part 1: Definitions for miniature fuses and
general requirements for miniature fuse-links
IEC 60127-6 1994 Miniature fuses - EN 60127-6 1994
+ A1 1996 Part 6: Fuse-holders for miniature cartridge + A1 1996
+ A2 2002 fuse-links + A2 2003
IEC 60664-1 2007 Insulation coordination for equipment within EN 60664-1 2007
low-voltage systems -
Part 1: Principles, requirements and tests
IEC 60695-2-12 2010 Fire hazard testing - EN 60695-2-12 2010
Part 2-12: Glowing/hot-wire based test
methods - Glow-wire flammability index
(GWFI) test method for materials
IEC 60695-2-13 2010 Fire hazard testing - EN 60695-2-13 2010
+ corr. February 2012 Part 2-13: Glowing/hot-wire based test
methods - Glow-wire ignition temperature
(GWIT) test method for materials
IEC 60695-4 2012 Fire hazard testing - EN 60695-4 2012
Part 4: Terminology concerning fire tests for
electrotechnical products
IEC 61249-2-7 2002 Materials for printed boards and other EN 61249-2-7 2002
interconnecting structures - + corr. September 2005
Part 2-7: Reinforced base materials, clad
and unclad - Epoxide woven E-glass
laminated sheet of defined flammability
(vertical burning test), copper-clad
ISO 3 1973 Preferred numbers - Series of preferred - -
numbers
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SIST EN 60127-7:2013
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SIST EN 60127-7:2013
IEC 60127-7
®
Edition 1.0 2013-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Miniature fuses –
Part 7: Miniature fuse-links for special applications
Coupe-circuits miniatures –
Partie 7: Eléments de remplacement miniatures pour applications spéciales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 29.120.50 ISBN 978-2-83220-670-6
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 60127-7:2013
– 2 – 60127-7 IEC:2013
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General requirements . 7
5 Standard ratings . 8
6 Marking . 8
7 General notes on tests . 9
8 Dimensions and construction . 12
9 Electrical requirements . 13
9.1 Voltage drop . 13
9.2 Time/current characteristic . 13
9.2.1 Time/current characteristic at normal ambient temperature . 13
9.2.2 Test at elevated temperature . 13
9.3 Breaking capacity . 13
9.3.1 Operating conditions . 13
9.3.2 Criteria for satisfactory performance . 15
9.4 Endurance tests . 15
9.4.101 Endurance test at normal ambient temperature . 16
9.4.102 Test method A . 16
9.4.103 Test method B . 16
9.5 Maximum sustained dissipation . 16
9.6 Pulse tests . 16
9.7 Fuse-link temperature . 16
9.7.101 Fuse-links for use on printed circuit boards . 16
9.7.102 Fuse-links for use in fuse-holders . 17
Annex AA (informative) Guidance on ratings to be specified by the manufacturer or to
be agreed upon with the testing house . 23
Figure 1 – Standard test board . 10
Figure 2 – Standard test base for printed circuit board . 11
Figure 3 – Test circuits for breaking capacity tests . 14
Table 1 – Power factor and time constant . 15
Table 2 – Testing schedule for a.c. or d.c. breaking capacity fuse-links . 18
Table 3 – Testing schedule for a.c. and d.c. breaking capacity fuse-links . 19
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SIST EN 60127-7:2013
60127-7 IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MINIATURE FUSES –
Part 7: Miniature fuse-links for special applications
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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 60127-7 has been prepared by subcommittee 32C: Miniature fuses,
of IEC technical committee 32: Fuses.
The text of this standard is based on the following documents:
CDV Report on voting
32C/458/CDV 32C/467/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This International Standard is to be used in conjunction with IEC 60127-1:2006, Miniature
fuses – Part 1: Definitions for miniature fuses and general requirements for miniature fuse-
links and its Amendment 1 (2011).
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SIST EN 60127-7:2013
– 4 – 60127-7 IEC:2013
The clauses of this standard supplement, modify or replace the corresponding clauses in
IEC 60127-1.
Where there is no corresponding clause or subclause in this standard, the clause or
subclause of IEC 60127-1 applies without modification as far as is reasonable. When this
standard states “addition” or “replacement”, the relevant text in IEC 60127-1 is to be adapted
accordingly.
Subclauses which are additional to those in Part 1 are numbered starting from 101. Additional
annexes are numbered AA, BB, etc.
A list of all parts in the IEC 60127 series, published under the general title Miniature fuses,
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability 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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SIST EN 60127-7:2013
60127-7 IEC:2013 – 5 –
INTRODUCTION
According to the wish expressed by the users of miniature fuses, all standards,
recommendations and other documents relating to miniature fuses should have the same
publication number in order to facilitate reference to fuses in other specifications, for example,
equipment specifications.
Furthermore, a single publication number and subdivision into parts would facilitate the
establishment of new standards, because clauses containing general requirements need not
be repeated.
The IEC 60127 series, under the general heading Miniature fuses, is thus subdivided as
follows:
IEC 60127-1, Miniature fuses – Part 1: Definitions for miniature fuses and general
requirements for miniature fuse-links
IEC 60127-2, Miniature fuses – Part 2: Cartridge fuse-links
IEC 60127-3, Miniature fuses – Part 3: Sub-miniature fuse-links
IEC 60127-4, Miniature fuses – Part 4: Universal modular fuse-links (UMF) – Through-hole
and surface mount types
IEC 60127-5, Miniature fuses – Part 5: Guidelines for quality assessment of miniature fuse-
links
IEC 60127-6, Miniature fuses – Part 6: Fuse-holders for miniature fuse-links
IEC 60127-7, Miniature fuses – Part 7: Miniature fuse-links for special applications
IEC 60127-8, (Free for further documents)
IEC 60127-9, (Free for further documents)
IEC 60127-10, Miniature fuses – Part 10: User guide for miniature fuses
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SIST EN 60127-7:2013
– 6 – 60127-7 IEC:2013
MINIATURE FUSES –
Part 7: Miniature fuse-links for special applications
1 Scope
This part of IEC 60127 covers requirements for miniature fuse-links for special applications.
It does not apply to fuses completely covered by the subsequent parts of IEC 60269-1.
It does not apply to miniature fuse-links for appliances intended to be used under special
conditions, such as in corrosive or explosive atmospheres.
This standard applies in addition to the requirements of IEC 60127-1.
This standard is applicable to fuse-links with a rated voltage not exceeding 1000 V, a rated
current not exceeding 20 A and a rated breaking capacity not exceeding 50 kA.
Miniature fuse-links for special applications are not intended to be replaced by the end-user of
an electrical / electronic appliance.
The object of this standard is to establish uniform test methods for miniature fuse-links for
special applications, so as to allow verification of the values (for example melting time and
breaking capacity values) specified by the manufacturer.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-2-21:2006, Environmental testing – Part 2-21: Tests – Test U: Robustness of
terminations and integral mounting devices
IEC 60127-1:2006, Miniature fuses – Part 1: Definitions for miniature fuses and general
requirements for miniature fuse-links
IEC 60127-6:1994, Miniature fuses – Part 6: Fuse-holders for miniature cartridge fuse-links
Amendment 1:1996
Amendment 2:2002
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60695-2-12:2010, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods –
Glow-wire flammability index (GWFI) test method for materials
IEC 60695-2-13:2010, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods –
Glow-wire ignition temperature (GWIT) test method for materials
IEC 60695-4:2012, Fire hazard testing – Part 4: Terminology concerning fire tests for
electrotechnical products
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SIST EN 60127-7:2013
60127-7 IEC:2013 – 7 –
IEC 61249-2-7:2002, Materials for printed boards and other interconnecting structures –
Part 2-7: Reinforced base materials clad and unclad – Epoxide woven E-glass laminated
sheet of defined flammability (vertical burning test), copper-clad
ISO 3:1973, Preferred numbers – Series of preferred numbers
3 Terms and definitions
For the purposes of this document, the terms and definitions given in Clause 3 of IEC 60127-
1:2006, except 3.5, as well as the following apply.
3.1
miniature fuse-link for special applications
enclosed fuse-link which is not covered in IEC 60127-2, IEC 60127-3 or IEC 60127-4 and of
rated breaking capacity not exceeding 50 kA, with a width and height not exceeding 12 mm
and a length not exceeding 50 mm
Note 1 to entry: Special precautions may be necessary to ensure that the fuse-links will be replaced by a fuse-link
with the same technical parameters.
3.2
t to t
1 8
limit values for time/current characteristic
3.3
I
70
test current for testing at elevated temperature of 70 °C
Note 1 to entry: Preferred values are 0,8 I or 1,0 I or 1,1 I .
N N N
3.4
I (A)
test
test current for endurance testing according to method A
Note 1 to entry: Preferred values are 1,0 I or 1,05 I or 1,2 I .
N N N
3.5
I (B)
test
test current for endurance testing according to method B
Note 1 to entry: Preferred values are 0,8 I or 1,0 I .
N N
3.6
I (A)
OVL
test current for measuring the maximum sustained dissipation according to method A
Note 1 to entry: Preferred values are 1,25 I or 1,35 I or 1,5 I .
N N N
3.7
I (B)
OVL
test current for measuring the maximum sustained dissipation according to method B
Note 1 to entry: Preferred values are 1,0 I or 1,25 I .
N N
4 General requirements
Clause 4 of IEC 60127-1:2006 applies.
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SIST EN 60127-7:2013
– 8 – 60127-7 IEC:2013
5 Standard ratings
Clause 5 of IEC 60127-1:2006 does not apply.
Replacement:
The following ratings shall be agreed upon between the testing house and the manufacturer:
– rated voltage;
– rated current (see standard sheet 1 for preferred ratings);
– rated breaking capacity (a.c. and/or d.c.);
– time/current characteristic (at least at 2,0 I or 2,1 I and 10 I ).
N N N
The following may be agreed upon on an optional basis:
– test at elevated temperature;
– time/current characteristic (additionally at 2,75 I and 4 I ).
N N
Any additional specified values are given in standard sheet 1.
6 Marking
Clause 6 of IEC 60127-1:2006 applies except as follows.
6.1
Replacement:
d) Not applicable.
NOTE A symbol denoting the time/current characteristic cannot be stated, because this part of IEC 60127 does
not specify any values for this parameter.
Addition:
e) Type designation.
f) Rated breaking capacity in amperes (A) or in kilo amperes (kA).
6.2
Deletion of NOTE 2.
6.3
Addition after first paragraph:
Furthermore the rated breaking capacity in amperes (A) or in kilo amperes (kA) shall be
marked on the package label.
6.4
Addition of heading title and replacement of text:
6.4 Colour coding for miniature fuse-links for special applications
Marking of fuse-links by means of colour bands according to IEC 60127-1:2006, Annex A, is
not permitted. It is, however, possible to use colour markings that clearly differ from this
colour band system. In this case, the manufacturer shall provide the relevant information, for
example colour key.
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SIST EN 60127-7:2013
60127-7 IEC:2013 – 9 –
Additional subclause:
6.101 Where marking is impracticable due to space limitations, the relevant information
should appear on the smallest package and in the manufacturer’s technical literature.
7 General notes on tests
Clause 7 of IEC 60127-1:2006 applies except as follows.
7.2 Type tests
7.2.1
Replacement:
For testing the individual current ratings of fuses with a.c. or d.c. breaking capacity, the
number of fuse-links required is 51, of which 12 are kept as spares.
The testing schedule is shown in Table 2.
For testing the individual current ratings of fuses with a.c. and d.c. breaking capacity, the
number of fuse-links required is 63, of which 9 are kept as spares.
The testing schedule is shown in Table 3.
7.3 Fuse-bases for tests
Addition:
For fuse-links designed for use in a special type of fuse-holder, testing shall be performed in
that fuse-holder.
For tests that require a printed circuit board for mounting and connection of the fuse-links, a
test board according to Figure 1 shall be used.
NOTE Fuse-bases for surface-mounted fuse-links are under consideration.
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SIST EN 60127-7:2013
– 10 – 60127-7 IEC:2013
Dimensions in millimetres
∅4,2
O U
U
20
n × e
1
n × e
5
90
100
Figure 1A
∅1,0
n × e
1
Radius =
2
IEC 492/13
Key
O copper layer
U connection for voltage drop measurement
e 2,5 mm
n 1, 2, 3, 4
1
n 1, 2, 3 … (to be adapted depending on the length of the fuse-link)
Figure 1 – Standard test board
This test board shall be mounted on the fuse-base according to Figure 2.
10
16,5
3
33
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SIST EN 60127-7:2013
60127-7 IEC:2013 – 11 –
Dimensions in millimetres
D
F C
E
B A
G
90
IEC 493/13
Key
A base of low heat conducting material, thickness 10 mm
B brass electrodes 10 mm × 10 mm
C fuse-link soldered in place
D fixing screws
E contact screws holding solder terminal
F printed circuit board according to Figure 1
G top view of base with brass electrodes 10 mm × 10 mm
Figure 2 – Standard test base for printed circuit board
The test board shall be made of epoxide woven glass fabric copper-clad laminated sheet, as
defined in IEC 61249-2-7.
The nominal sheet thickness shall be 1,6 mm.
The nominal thickness of copper layer may be 0,035 mm or 0,070 mm.
The nominal width of copper layer may be 2,5 mm, 5 mm, 7,5 mm or 10 mm.
The nominal thickness and nominal width of applied copper layer shall be stated in the test
report.
Metal parts of the fuse-base shall be made of brass with a copper content between 58 % and
70 %. Contact parts shall be silver-plated.
7.4 Nature of supply
Addition:
Schedule for testing fuse-links with a.c. or d.c. breaking capacity according to Standard
Sheet 1, see Table 2.
5
5
30
40
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SIST EN 60127-7:2013
– 12 – 60127-7 IEC:2013
Schedule for testing fuse-links with a.c. and d.c. breaking capacity according to Standard
Sheet 1, see Table 3.
8 Dimensions and construction
Clause 8 of IEC 60127-1:2006 applies except as follows.
8.2 Construction
Replacement:
The fuse-element shall be completely enclosed.
The fuse-links shall be resistant to heat according to 9.7, and to fire according to
IEC 60695-2-12 and IEC 60695-2-13.
Compliance is checked by inspection. This is not applicable for fuse-links which represent
small parts according to IEC 60695-4:2012, 3.78.
For fuse bodies made of plastic material or of material containing organic substances the
following minimum requirements apply:
– Glow-wire ignition temperature (GWIT) = 775 °C
– Glow-wire flammability index (GWFI) = 850 °C
NOTE 1 For the glow wire tests it is necessary to use material plates with dimensions according to IEC 60695-2-
12:2010, 4.2 and/or IEC 60695-2-13:2010,, 4.2.
NOTE 2 For materials such as glass and ceramic whose GWIT and GWFI are thought to be higher than 775 °C
and respectively 850 °C the glow-wire tests do not apply.
8.3 Fuse-link terminations
Replacement:
Subclause 8.3 applies only to fuse-links with wire terminations.
Fuse-link contacts shall be made of non-corroding material or of material suitably protected
against corrosion, and shall be effectively free from flux or other non-conducting substance on
their outer surfaces.
Nickel or silver plating is deemed to be adequate protection for brass end caps.
The fuse-link terminations shall be reliably attached.
The samples shall be immersed in water for 24 h at a temperature of between 15 °C and
35 °C.
Terminations shall withstand the mechanical forces likely to be encountered during normal
use. With the fuse-link held in a fixed position, each terminal in turn is subjected at ambient
temperature t
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