SIST EN 60079-6:2007
Explosive atmospheres -- Part 6: Equipment protection by oil immersion o
Explosive atmospheres -- Part 6: Equipment protection by oil immersion o
This part of IEC 60079 specifies the requirements for the construction and testing of oilimmersed electrical equipment, oil-immersed parts of electrical equipment and Ex components in the type of protection oil immersion "o", intended for use in explosive gas atmospheres. 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 takes precedence. This standard is applicable to electrical equipment, parts of electrical equipment, and Ex components which, in the absence of oil immersion, are not ignition capable in normal operation as determined by IEC 60079-15 or IEC 60079-11.
Explosionsfähige Atmosphäre - Teil 6: Geräteschutz durch Ölkapselung o
Atmosphères explosives -- Partie 6: Protection du matériel par immersion dans l'huile o
La présente partie de la CEI 60079 spécifie les exigences de construction et d'essais du matériel électrique immergé dans l'huile, des parties de matériel immergé dans l'huile et de composants Ex, de mode de protection 'o', destinés à être utilisés dans des atmosphères explosives gazeuses. Les modifications importantes par rapport à l'édition précédente sont: toutes les exigences relatives à la certification par une tierce partie ont été supprimées; des exigences ont été ajoutées pour les connexions externes; toutes les exigences relatives au marquage ont été placées dans l'article ' Marquage ', et des exigences ont été ajoutées pour les instructions.
Eksplozivne atmosfere - 6. del: Zaščita opreme s potopitvijo v olje "o" (IEC 60079-6:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60079-6:2007
01-november-2007
1DGRPHãþD
SIST EN 50015:2000
(NVSOR]LYQHDWPRVIHUHGHO =DãþLWDRSUHPHVSRWRSLWYLMRYROMHR ,(&
Explosive atmospheres - Part 6: Equipment protection by oil immersion "o"
Explosionsfähige Atmosphäre - Teil 6: Geräteschutz durch Ölkapselung "o"
Atmospheres explosives - Partie 6: Protection du matériel par immersion dans l'huile "o"
Ta slovenski standard je istoveten z: EN 60079-6:2007
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
SIST EN 60079-6:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 60079-6
NORME EUROPÉENNE
May 2007
EUROPÄISCHE NORM
ICS 29.260.20 Supersedes EN 50015:1998
English version
Explosive atmospheres -
Part 6: Equipment protection by oil immersion "o"
(IEC 60079-6:2007)
Atmosphères explosives - Explosionsfähige Atmosphäre -
Partie 6: Protection du matériel Teil 6: Geräteschutz
par immersion dans l'huile "o" durch Ölkapselung "o"
(CEI 60079-6:2007) (IEC 60079-6:2007)
This European Standard was approved by CENELEC on 2007-05-01. 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 60079-6:2007 E
---------------------- Page: 2 ----------------------
EN 60079-6:2007 - 2 -
Foreword
The text of document 31/673/FDIS, future edition 3 of IEC 60079-6, prepared by IEC TC 31, Equipment
for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60079-6 on 2007-05-01.
This European Standard supersedes EN 50015:1998.
This standard is to be used in conjunction with EN 60079-0:2006.
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) 2008-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-05-01
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.
Annexes ZA and ZZ have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60079-6:2007 was approved by CENELEC as a European
Standard without any modification.
__________
---------------------- Page: 3 ----------------------
- 3 - EN 60079-6:2007
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) 2)
IEC 60079-0 - Electrical apparatus for explosive gas EN 60079-0 2006
atmospheres -
Part 0: 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) 2)
IEC 60079-15 - Electrical apparatus for explosive gas EN 60079-15 2005
atmospheres -
Part 15: Construction, test and marking of
type of protection "n" electrical apparatus
1) 2)
IEC 60156 - Insulating liquids - Determination of the EN 60156 1995
breakdown voltage at power frequency -
Test method
1) 2)
IEC 60247 - Insulating liquids - Measurement of relative EN 60247 2004
permittivity, dielectric dissipation factor (tan d)
and d.c. resistivity
1) 2)
IEC 60296 - Fluids for electrotechnical applications - EN 60296 2004
Unused mineral insulating oils for + corr. September 2004
transformers and switchgear
IEC 60529 1989 Degrees of protection provided by enclosures EN 60529 1991
(IP Code) + corr. May 1993
A1 1999 A1 2000
1)
IEC 60588-2 - Askarels for transformers and capacitors - - -
Part 2: Test methods
1) 2)
IEC 60836 - Specifications for unused silicone insulating EN 60836 2005
liquids for electrotechnical purposes
1) 2)
ISO 2719 - Determination of flash point - EN ISO 2719 2002
Pensky-Martens closed cup method
1)
ISO 3016 - Petroleum products - Determination of pour - -
point
1)
Undated reference.
2)
Valid edition at date of issue.
---------------------- Page: 4 ----------------------
EN 60079-6:2007 - 4 -
Publication Year Title EN/HD Year
1) 2)
ISO 3104 - Petroleum products - Transparent and EN ISO 3104 1996
opaque liquids - Determination of kinematic
viscosity and calculation of dynamic viscosity
---------------------- Page: 5 ----------------------
- 5 - EN 60079-6:2007
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 to ER 1.0.6
– ER 1.1.3
– ER 1.2.1 (partly), ER 1.2.6
– ER 1.3.1
– ER 1.5.1, ER 1.5.4
– ER 1.6.4
– ER 2.0.2.1
– ER 2.2.1.1, ER 2.2.1.2, ER 2.2.1.3 (partly)
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.
---------------------- Page: 6 ----------------------
NORME CEI
INTERNATIONALE
IEC
60079-6
INTERNATIONAL
Troisième édition
STANDARD
Third edition
2007-03
Atmosphères explosives –
Partie 6:
Protection du matériel par immersion
dans l’huile «o»
Explosive atmospheres –
Part 6:
Equipment protection by oil immersion «o»
© IEC 2007 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. 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: inmail@iec.ch Web: www.iec.ch
CODE PRIX
P
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 7 ----------------------
60079-6 © IEC:2007 – 3 –
CONTENTS
FOREWORD.5
1 Scope.9
2 Normative references .9
3 Terms and definitions .11
4 Constructional requirements .13
4.1 General .13
4.2 Protective liquid.13
4.3 Group I equipment.13
4.4 Deterioration of the protective liquid .13
4.5 Guarding of fasteners.15
4.6 Protective level indication.15
4.7 Limiting temperature.17
4.8 Immersion depth.17
4.9 Capillary or siphon action .17
4.10 Devices for draining of liquid .17
4.11 Sealed enclosures.17
4.12 Non-sealed enclosures.17
4.13 External connections .19
5 Verifications and tests .19
5.1 Type tests .19
5.2 Routine tests .19
6 Marking .21
7 Instructions.21
Annex A (informative) Introduction of an alternative risk assessment method
encompassing "equipment protection levels" for Ex equipment .23
Table A.1 – Traditional relationship of EPLs to Zones (no additional risk assessment).27
Table A.2 – Description of risk of ignition protection provided .29
---------------------- Page: 8 ----------------------
60079-6 © IEC:2007 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 6: Equipment
protection by oil immersion "o"
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 60079-6 has been prepared by IEC technical committee 31:
Equipment for explosive atmospheres.
This third edition cancels and replaces the second edition, published in 1995, and constitutes
a technical revision.
This part is to be used in conjunction with IEC 60079-0:2004, Electrical apparatus for
explosive gas atmospheres – Part 0: General requirements.
The significant changes with respect to the previous edition are listed below:
– all requirements for third-party certification removed;
– added requirements for external connections;
– collected all marking requirements in the marking clause;
– added requirements for instructions.
---------------------- Page: 9 ----------------------
60079-6 © IEC:2007 – 7 –
NOTE Technical Committee 31 has appointed a task group to consider the possible expansion of this type of
protection to include level of protection Gc and sparking contacts. If a need for such an expansion is demonstrated,
the resulting changes could appear in the next edition, planned for 2013.
The text of this standard is based on the following documents:
FDIS Report on voting
31/673/FDIS 31/687/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 publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 60079 series, under the general title Explosive atmospheres,
can be found on the IEC website.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of a new edition.
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.
---------------------- Page: 10 ----------------------
60079-6 © IEC:2007 – 9 –
EXPLOSIVE ATMOSPHERES –
Part 6: Equipment
protection by oil immersion "o"
1 Scope
This part of IEC 60079 specifies the requirements for the construction and testing of oil-
immersed electrical equipment, oil-immersed parts of electrical equipment and Ex
components in the type of protection oil immersion "o", intended for use in explosive gas
atmospheres.
NOTE Type of protection oil immersion “o” provides equipment protection level (EPL) Gb. For further information,
see Annex A.
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 takes precedence.
This standard is applicable to electrical equipment, parts of electrical equipment, and Ex
components which, in the absence of oil immersion, are not ignition capable in normal
operation as determined by IEC 60079-15 or IEC 60079-11.
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, Electrical apparatus for explosive gas atmospheres – Part 0: General
requirements
IEC 60079-7, Electrical apparatus for explosive gas atmospheres – Part 7: Increased safety “e”
IEC 60079-11, Electrical apparatus for explosive gas atmospheres – Part 11: Intrinsic safety “i”
IEC 60079-15, Electrical apparatus for explosive gas atmospheres – Part 15: Construction,
test and marking of type of protection “n” electrical apparatus
IEC 60156, Insulating liquids –Determination of the breakdown voltage at power frequency –
Test method
IEC 60247, Insulating liquids – Measurement of relative permittivity, dielectric dissipation
factor (tan δ) and d.c. resistivity
IEC 60296, Fluids for electrotechnical applications – Unused mineral insulating oils for
transformers and switchgear
---------------------- Page: 11 ----------------------
60079-6 © IEC:2007 – 11 –
IEC 60529, Degrees of protection provided by enclosures (IP Code)
Amendment 1 (1999)
IEC 60588-2, Askarels for transformers and capacitors – Part 2: Test methods
IEC 60836: Specifications for unused silicone insulating liquids for electrotechnical purposes
ISO 2719, Determination of flash point – Pensky-Martens closed cup method
ISO 3016, Petroleum oils – Determination of pour point
ISO 3104, Petroleum products – Transparent and opaque liquids – Determination of kinematic
viscosity and calculation of dynamic viscosity
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply; they supplement
the terms and definitions given in IEC 60079-0.
NOTE Additional definitions applicable to explosive atmospheres can be found in IEC 60050-426.
3.1
oil immersion "o"
type of protection in which the electrical equipment or parts of the electrical equipment are
immersed in a protective liquid in such a way that an explosive gas atmosphere which may be
above the liquid or outside the enclosure cannot be ignited
3.2
protective liquid
mineral oil conforming to IEC 60296 or an alternative liquid meeting the requirements of 4.2
3.3
sealed equipment
equipment designed and constructed in such a manner as to prevent ingress of an external
atmosphere during the expansion and contraction of the internally contained liquid during
normal operation, for example, by means of an expansion vessel
3.4
non-sealed equipment
equipment designed and constructed in such a manner as to allow the ingress and egress of
an external atmosphere during the expansion and contraction of the internally contained fluid
during normal operation
3.5
maximum permissible protective liquid level
maximum level that the protective liquid can attain in normal service, taking into account the
effects of expansion from the worst-case filling condition specified by the manufacturer to the
condition of full load at maximum ambient temperature for which the equipment is designed
---------------------- Page: 12 ----------------------
60079-6 © IEC:2007 – 13 –
3.6
minimum permissible protective liquid level
minimum level that the protecti
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.