SIST EN 60079-18:2010
(Main)Explosive atmospheres -- Part 18: Equipment protection by encapsulation m
Explosive atmospheres -- Part 18: Equipment protection by encapsulation m
This part of IEC 60079 gives the specific requirements for the construction, testing and marking of electrical equipment, parts of electrical equipment and Ex components with the type of protection encapsulation "m" intended for use in explosive gas atmospheres or explosive dust atmospheres. This part applies only for encapsulated electrical equipment, encapsulated parts of electrical equipment and encapsulated Ex components (hereinafter always referred to as "m" equipment) where the rated voltage does not exceed 11 kV. The application of electrical equipment in atmospheres, which may contain explosive gas as well as combustible dust simultaneously may require additional protective measures. This standard does not apply to dusts of explosives, which do not require atmospheric oxygen for combustion, or to pyrophoric substances This standard does not take account of any risk due to an emission of flammable or toxic gas from the dust. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard shall take precedence.
Explosionsfähige Atmosphäre -- Teil 18: Geräteschutz durch Vergusskapselung m
Atmosphères explosives -- Partie 18: Protection du matériel par encapsulage m
La CEI 60079-18:2009 définit les exigences spécifiques à la construction, aux essais et au marquage des matériels électriques, des parties de matériels électriques et des composants Ex protégés par encapsulage de type 'm' et destinés à une utilisation dans les atmosphères explosives gazeuses ou les atmosphères explosives poussiéreuses. La présente partie ne s'applique qu'aux matériels électriques protégés par encapsulage, aux parties de matériel électrique protégées par encapsulage et aux composants Ex protégés par encapsulage pour lesquels la tension assignée n'excède pas 11 kV. Les modifications techniques importantes par rapport à l'édition antérieure sont indiquées ci-dessous: - Introduction du niveau de protection 'mc' - Niveaux de protection du matériel (EPL Ma, Ga, Da, Mb, Gb, Db, Gc, Dc) - Introduction des exigences pour la poussière - Introduction des contacts de commutation pour le niveau de protection 'ma'. Cette publication doit être lue conjointement avec la CE I 60079-0:2007. NEW! La CEI 60079-18:2009 est également disponible sous forme de
Eksplozivne atmosfere - 18. del: Zaščita opreme z zalivanjem z zalivno maso "m" (IEC 60079-18:2009 + corrigendum Jun. 2009)
Ta del IEC 60079 podaja posebne zahteve za izgradnjo, preskušanje in označevanje električne opreme, delov električne opreme in Ex komponent z vrsto zaščite z zalivanjem z zaščitno maso »m«, namenjenih za uporabo v eksplozivnih plinskih atmosferah ali eksplozivnih prašnih atmosferah. Ta del velja samo za električno opremo, zalito z zaščitno maso, dele električne opreme, zalite z zaščitno maso, in Ex komponente, zalite z zaščitno maso (v nadaljevanju »m« oprema), kjer nazivna napetost ne preseže 11 kV. Uporaba električne opreme v atmosferah, ki lahko istočasno vsebujejo eksplozivne pline in gorljiv prah, lahko zahteva dodatne varnostne ukrepe. Ta standard ne velja za prah eksplozivov, ki ne potrebuje atmosferskega kisika za zgorevanje ali za piroforne snovi. Ta standard ne upošteva kakršnega koli tveganja zaradi emisije gorljivih ali strupenih plinov iz prahu. Ta standard dopolnjuje in spreminja splošne zahteve IEC 60079-0. Kjer zahteva tega standarda nasprotuje zahtevi IEC 60079-0, ima zahteva tega standarda prednost.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60079-18:2010
01-marec-2010
(NVSOR]LYQHDWPRVIHUHGHO =DãþLWDRSUHPH]]DOLYDQMHP]]DOLYQRPDVR
P ,(& FRUULJHQGXP-XQ
Explosive atmospheres -- Part 18: Equipment protection by encapsulation m
Explosionsfähige Atmosphäre -- Teil 18: Geräteschutz durch Vergusskapselung m
Atmosphères explosives -- Partie 18: Protection du matériel par encapsulage m
Ta slovenski standard je istoveten z: EN 60079-18:2009
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
SIST EN 60079-18:2010 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60079-18:2010
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SIST EN 60079-18:2010
EUROPEAN STANDARD
EN 60079-18
NORME EUROPÉENNE
December 2009
EUROPÄISCHE NORM
ICS 29.260.20 Supersedes EN 60079-18:2004 + corr. April 2006 and EN 61241-18:2004
English version
Explosive atmospheres -
Part 18: Equipment protection by encapsulation "m"
(IEC 60079-18:2009 + corrigendum 2009)
Atmosphères explosives - Explosionsfähige Atmosphäre -
Partie 18: Protection du matériel Teil 18: Geräteschutz
par encapsulage "m" durch Vergusskapselung "m"
(CEI 60079-18:2009 + corrigendum 2009) (IEC 60079-18:2009 + Corrigendum 2009)
This European Standard was approved by CENELEC on 2009-10-01. 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: Avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60079-18:2009 E
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SIST EN 60079-18:2010
EN 60079-18:2009 - 2 -
Foreword
The text of document 31/784/FDIS, future edition 3 of IEC 60079-18, prepared by IEC TC 31, Equipment
for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60079-18 on 2009-10-01.
This European Standard supersedes EN 60079-18:2004 + corrigendum April 2006 and
EN 61241-18:2004.
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) 2010-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-10-01
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive ATEX (94/9/EC). See Annex ZZ.
CENELEC/TC 31 as the responsible committee has concluded that this new edition of EN 60079-18 does
not contain substantial changes regarding the ESRs.
The State of the Art is included in Annex ZY “Significant changes between this European Standard and
EN 60079-18:2004".
Annexes ZA, ZY and ZZ have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60079-18:2009 + corrigendum June 2009 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 60079-1 NOTE Harmonized as EN 60079-1:2007 (not modified).
IEC 60079-2 NOTE Harmonized as EN 60079-2:2007 (not modified).
IEC 60079-5 NOTE Harmonized as EN 60079-5:2007 (not modified).
IEC 60079-6 NOTE Harmonized as EN 60079-6:2007 (not modified).
IEC 60079-10 NOTE Harmonized as EN 60079-10:2003 (not modified).
IEC 60079-14 NOTE Harmonized as EN 60079-14:2008 (not modified).
IEC 60079-26 NOTE Harmonized as EN 60079-26:2007 (not modified).
IEC 60079-28 NOTE Harmonized as EN 60079-28:2007 (not modified).
IEC 60086-1 NOTE Harmonized as EN 60086-1:2007 (not modified).
IEC 60622 NOTE Harmonized as EN 60622:2003 (not modified).
IEC 60664-1 NOTE Harmonized as EN 60664-1:2007 (not modified).
IEC 61241-10 NOTE Harmonized as EN 61241-10:2004 (not modified).
IEC 61951-1 NOTE Harmonized as EN 61951-1:2003 (not modified).
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SIST EN 60079-18:2010
- 3 - EN 60079-18:2009
IEC 61951-2 NOTE Harmonized as EN 61951-2:2003 (not modified).
IEC 61960-1 NOTE Harmonized as EN 61960-1:2001 (not modified).
__________
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SIST EN 60079-18:2010
EN 60079-18:2009 - 4 -
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) 2)
IEC 60079-0 - Explosive atmospheres - EN 60079-0 2009
Part 0: Equipment - General requirements
1) 2)
IEC 60079-7 - Explosive atmospheres - EN 60079-7 2007
Part 7: Equipment protection by increased
safety "e"
1) 2)
IEC 60079-11 - Explosive atmospheres - EN 60079-11 2007
Part 11: Equipment protection by intrinsic
safety "i"
1) 3)
IEC 60079-15 - Explosive atmospheres - EN 60079-15 200X
Part 15: Equipment protection by type of
protection "n"
1) 2)
IEC 60079-26 - Explosive atmospheres - EN 60079-26 2007
Part 26: Equipment with equipment protection
level (EPL) Ga
1) 2)
IEC 60079-31 - Explosive atmospheres - EN 60079-31 2009
Part 31: Equipment dust ignition protection by
enclosure "t"
IEC 60127 Series Miniature fuses EN 60127 Series
1) 2)
IEC 60243-1 - Electrical strength of insulating materials - EN 60243-1 1998
Test methods -
Part 1: Tests at power frequencies
1) 2)
IEC 60691 - Thermal-links - Requirements and application EN 60691 2003
guide
1)
IEC 60730-2-9 - Automatic electrical controls for household - -
(mod) and similar use -
Part 2-9: Particular requirements for
temperature sensing controls
1) 2)
IEC 60738-1 - Thermistors - Directly heated positive EN 60738-1 2006
temperature coefficient -
Part 1: Generic specification
1) 2)
IEC 61241-11 - Electrical apparatus for use in the presence of EN 61241-11 2006
combustible dust -
Part 11: Protection by intrinsic safety 'iD'
1)
Undated reference.
2)
Valid edition at date of issue.
3)
To be ratified.
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SIST EN 60079-18:2010
- 5 - EN 60079-18:2009
Publication Year Title EN/HD Year
1) 2)
IEC 61558-2-6 - Safety of power transformers, power supply EN 61558-2-6 2009
units and similar -
Part 2-6: Particular requirements for safety
isolating transformers for general use
1) 2)
IEC 62326-4-1 - Printed boards - EN 62326-4-1 1997
Part 4: Rigid multilayer printed boards with
interlayer connections - Sectional
specification - Section 1: Capability Detail
Specification - Performance levels A, B and C
1)
ISO 62 - Plastics - Determination of water absorption - -
1)
ANSI/UL 248-1 - Standard for low-voltage fuses - - -
Part 1: General requirements
1)
ANSI/UL 746B - Standard for polymeric materials - Long-term - -
property evaluations
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SIST EN 60079-18:2010
EN 60079-18:2009 - 6 -
Annex ZY
(informative)
Significant changes between this European Standard and EN 60079-18:2004
The significant changes with respect to EN 60079-18:2004 are as listed below.
Type
Minor and Extension Substantial
editorial change
changes regarding
a
ESR´s
Incorporation of level of protection "mc" X
Equipment protection levels (EPL Ma, Ga, Da, Mb, Gb, Db,
X
Gc, Dc)
Incorporation of the dust requirements X
Incorporation of switching contacts for level of protection
X
"ma"
a
ESR = Essential Health and Safety Requirements (Annex II of Directive 94/9/EC)
General conclusion on the change of the State of the Art by this standard
CENELEC/TC 31 as the responsible committee has concluded that this new edition of EN 60079-18 does
not contain substantial changes regarding the ESRs.
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SIST EN 60079-18:2010
- 7 - EN 60079-18:2009
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers only the
following essential requirements out of those given in Annex II of the EC Directive 94/9/EC:
– ER 1.0.1, ER 1.0.2 (partly), ER 1.0.5 (partly)
– ER 1.1 (partly)
– ER 1.2.4, ER 1.2.8
– ER 1.3.1
– ER 1.6.4 (partly)
– ER 2.0.1 (partly)
– ER 2.0.2.1 (partly), ER 2.0.2.3 (partly)
– ER 2.1.1.1 (partly), ER 2.1.1.2 (partly)
– ER 2.1.2.1 (partly), ER 2.1.2.3 (partly)
– ER 2.2.1.1 (partly), ER 2.2.1.2 (partly)
– ER 2.2.2.1 (partly), ER 2.2.2.2 (partly)
– ER 2.3.1.1, ER 2.3.1.2
– ER 2.3.2.1, ER 2.3.2.2
Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.
WARNING: Other requirements and other EC Directives may be applicable to the products falling within
the scope of this standard.
__________
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SIST EN 60079-18:2010
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SIST EN 60079-18:2010
IEC 60079-18
®
Edition 3.0 2009-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 18: Equipment protection by encapsulation “m”
Atmosphères explosives –
Partie 18: Protection du matériel par encapsulage «m»
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
V
CODE PRIX
ICS 29.260.20 ISBN 2-8318-1036-2
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 60079-18:2010
– 2 – 60079-18 © IEC:2009
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms and definitions .7
4 General .9
4.1 Level of protection (Equipment protection level (EPL)) .9
4.2 Additional requirements for level of protection “ma”.9
4.3 Rated voltage and prospective short circuit current .9
5 Requirements for compounds .9
5.1 General .9
5.2 Specification .9
5.3 Properties of the compound.10
5.3.1 Water absorption .10
5.3.2 Dielectric strength .10
6 Temperatures .10
6.1 General .10
6.2 Determination of the limiting temperature .10
6.2.1 Maximum surface temperature.10
6.2.2 Temperature of the compound .10
6.3 Temperature limitation.10
7 Constructional requirements .11
7.1 General .11
7.2 Determination of faults .11
7.2.1 Fault examination .11
7.2.2 Components considered as not subject to fail .12
7.2.3 Isolating components.12
7.2.4 Infallible separation distances.12
7.3 Free space in the encapsulation .13
7.3.1 Group III “m” equipment.13
7.3.2 Group I and Group II “m” equipment .14
7.4 Thickness of the compound .15
7.4.1 “m” equipment .15
7.4.2 Windings for electrical machines .17
7.4.3 Rigid, multi-layer printed wiring boards with through connections .17
7.5 Switching contacts .18
7.5.1 Level of protection “ma”.18
7.5.2 Level of protection “mb”.18
7.5.3 Level of protection “mc” .18
7.6 External connections .19
7.6.1 General .19
7.6.2 Additional requirements for “ma” equipment .19
7.7 Protection of bare live parts.19
7.8 Cells and batteries .19
7.8.1 General .19
7.8.2 Prevention of gassing .19
7.8.3 Protection against inadmissible temperatures and damage to the cells .20
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SIST EN 60079-18:2010
60079-18 © IEC:2009 – 3 –
7.8.4 Reverse current.20
7.8.5 Current limitation .20
7.8.6 Protection against the polarity inversion and deep discharge of the
cells .20
7.8.7 Charging of cells or batteries.21
7.8.8 Requirements for control safety devices for cells or batteries .21
7.9 Protective devices .21
7.9.1 General .21
7.9.2 Electrical protective devices .22
7.9.3 Thermal protective devices .23
7.9.4 Built-in protective devices.23
8 Type tests .23
8.1 Tests on the compound .23
8.1.1 Water absorption test .23
8.1.2 Dielectric strength test.24
8.2 Tests on the apparatus.24
8.2.1 Test sequence.24
8.2.2 Maximum temperature .24
8.2.3 Thermal endurance test.24
8.2.4 Dielectric strength test.25
8.2.5 Cable pull test .25
8.2.6 Pressure test for Group I and Group II electrical equipment.26
8.2.7 Test for resettable thermal protective device .26
8.2.8 Sealing test for build-in protective devices.27
9 Routine verifications and tests.27
9.1 Visual inspections .27
9.2 Dielectric strength test.27
10 Marking .27
Annex A (informative) Basic requirements for compounds for “m” equipment .29
Annex B (normative) Allocation of test samples .30
Bibliography.31
Figure 1 – Dimensional key for thickness through the compound .16
Figure 2 – Minimum distances for multi-layer printed wiring boards.18
Figure 3 – Fitting of blocking diodes .20
Figure A.1 − Basic requirements for compounds for “m” equipment.29
Table 1 – Distances through the compound .13
Table 2 – Minimum thickness of compound adjacent to free space for Group III “m”
equipment.13
Table 3 – Minimum thickness of compound adjacent to free space for Group I and
Group II “m” equipment.14
Table 4 – Thickness of the compound.16
Table 5 – Minimum distances for multi-layer printed wiring boards.17
Table 6 – Test pressure .26
Table B.1 − Allocation of test samples .30
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SIST EN 60079-18:2010
– 4 – 60079-18 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 18: Equipment protection by encapsulation “m”
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 60079-18 has been prepared by IEC technical committee 31:
Equipment for explosive atmospheres.
This third edition cancels and replaces the second edition of IEC 60079-18 (2004) and
IEC 61241-18 (2004), and constitutes a technical revision.
The significant technical changes with respect to the previous edition are as follows:
– Incorporation of level of protection “mc”
– Equipment protection levels (EPL Ma, Ga, Da, Mb, Gb, Db, Gc, Dc)
– Incorporation of the dust requirements
– Incorporation of switching contacts for level of protection “ma”
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SIST EN 60079-18:2010
60079-18 © IEC:2009 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
31/784/FDIS 31/801/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.
This standard is to be read in conjunction with IEC 60079-0:2007, Explosive atmospheres –
Part 0: Equipment – General requirements.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all parts of IEC 60079 series, under the general title Explosive atmospheres, can
be found on the IEC website.
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.
The contents of the corrigendum of June 2009 have been included in this copy.
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SIST EN 60079-18:2010
– 6 – 60079-18 © IEC:2009
EXPLOSIVE ATMOSPHERES –
Part 18: Equipment protection by encapsulation “m”
1 Scope
This part of IEC 60079 gives the specific requirements for the construction, testing and
marking of electrical equipment, parts of electrical equipment and Ex components with the
type of protection encapsulation “m” intended for use in explosive gas atmospheres or
explosive dust atmospheres.
This part applies only for encapsulated electrical equipment, encapsulated parts of electrical
equipment and encapsulated Ex components (hereinafter always referred to as “m”
equipment) where the rated voltage does not exceed 11 kV.
The application of electrical equipment in atmospheres, which may contain explosive gas as
well as combustible dust simultaneously may require additional protective measures.
This standard does not apply to dusts of explosives, which do not require atmospheric oxygen
for combustion, or to pyrophoric substances
This standard does not take account of any risk due to an emission of flammable or toxic gas
from the dust.
This standard supplements and modifies the general requirements of IEC 60079-0. Where a
requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of
this standard shall take precedence.
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 60079-0, Explosive atmospheres – Part 0: Equipment – General requirements
IEC 60079-7, Explosive atmospheres – Part 7: Equipment protection by increased safety “e”
IEC 60079-11, Explosive atmospheres – Part 11: Equipment protection by intrinsic safety “i”
IEC 60079-15, Explosive atmospheres – Part 15: Equipment protection by type of protection
"n"
IEC 60079-26, Explosive atmospheres – Part 26: Equipment with equipment protection level
(EPL) Ga
IEC 60079-31, Explosive atmospheres – Part 31: Equipment dust ignition protection by
enclosures “t”
IEC 60127 (all parts), Miniature fuses
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SIST EN 60079-18:2010
60079-18 © IEC:2009 – 7 –
IEC 60243-1, Electrical strength of insulating material – Test methods – Part 1: Tests at
power frequencies
IEC 60691, Thermal-links – Requirements and application guide
IEC 60730-2-9, Automatic electrical controls for household and similar use – Part 2-9:
Parti
...
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