EN 60079-26:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Explosionsgefährdete Bereiche - Teil 26: Betriebsmittel mit Geräteschutzniveau (EPL) Ga (IEC 60079-26:2014)Atmosphères explosives - Partie 26: Matériel d'un niveau de protection du matériel (EPL) Ga (IEC 60079-26:2014)Explosive atmospheres - Part 26: Equipment with equipment protection level (EPL) Ga (IEC 60079-26:2014)29.260.20Electrical apparatus for explosive atmospheresICS:Ta slovenski standard je istoveten z:EN 60079-26:2015SIST EN 60079-26:2015en01-april-2015SIST EN 60079-26:2015SLOVENSKI
STANDARDSIST EN 60079-26:20071DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 60079-26
January 2015 ICS 29.260.20
Supersedes
EN 60079-26:2007
English Version
Explosive atmospheres -
Part 26: Equipment with Equipment Protection Level (EPL) Ga (IEC 60079-26:2014)
Atmosphères explosives -
Partie 26: Matériel d'un niveau de protection du matériel (EPL) Ga (IEC 60079-26:2014)
Explosionsgefährdete Bereiche -
Teil 26: Betriebsmittel mit Geräteschutzniveau (EPL) Ga (IEC 60079-26:2014) This European Standard was approved by CENELEC on 2014-12-02. 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. European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17,
B-1000 Brussels © 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60079-26:2015 E SIST EN 60079-26:2015

The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-09-02 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017-12-02
This document supersedes EN 60079-26:2007.
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 document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).
For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this document.
Endorsement notice The text of the International Standard IEC 60079-26:2014 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 60079-7 NOTE Harmonized as EN 60079-7. IEC 60079-14 NOTE Harmonized as EN 60079-14. IEC 60079-18 NOTE Harmonized as EN 60079-18. SIST EN 60079-26:2015

- 3 - EN 60079-26:2015 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 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu
Publication Year Title EN/HD Year
IEC 60079-0 -
Explosive atmospheres -
Part 0: Equipment - General requirements - -
IEC 60079-1 -
Explosive atmospheres -
Part 1: Equipment protection
by flameproof enclosures "d" EN 60079-1 -
IEC 60079-11 -
Explosive atmospheres -
Part 11: Equipment protection by intrinsic safety "i" EN 60079-11 -
IEC 60529 -
Degrees of protection provided by enclosures (IP Code) EN 60529 -
IEC 60695-11-10 -
Fire hazard testing -
Part 11-10: Test flames - 50 W horizontal and vertical flame test methods EN 60695-11-10 -
Coverage of Essential Requirements of EU 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 EU Directive 94/9/EC:
– ER 1.0.1 (partly), 1.0.2 (partly), ER 1.0.3 to ER 1.0.6 – ER 1.1.1, ER 1.1.2 – ER 1.2.1, ER 1.2.3, ER 1.2.5 (partly), ER 1.2.8, ER 1.2.9 – ER 1.3.1 (partly), ER 1.3.3, ER 1.3.4 – ER 1.4.1, ER 1.4.2 – ER 2.1.1 – ER 2.1.1.1, ER 2.1.1.2 (partly)
Compliance with this standard provides one means of conformity with the specified essential requirements of the Directive[s] concerned.
WARNING: Other requirements and other EU Directives may be applicable to the products falling within the scope of this standard. SIST EN 60079-26:2015

- 5 - EN 60079-26:2015 Annex ZY (informative)
Significant changes between this European Standard and EN 60079-26:2007 This European Standard supersedes EN 60079-26:2007. The significant changes with respect to EN 60079-26:2007 are as listed below.
Type Changes Clause Minor and editorial changes Extension Major technical changes Notes deleted 1 X
Reference to associated apparatus deleted 1 X
Additional normative references included 3 X
Requirements against
mechanical and electrostatic ignition hazards deleted (now covered in EN 60079-0)
4.1 X
Requirement for separation element detailed regarding external influences 4.1.3.2 X
Intrinsic safety Ex ia as single type of protection including associated apparatus deleted (now covered by EPL) 4.2.2 (ed.2) X
Encapsulation Ex ma as single type of protection deleted (now covered by EPL) 4.2.3 (ed.2) X
Conditions a) and b) linked with an “and”, therefore requirement of “flameproof joint” deleted in following clause. Both requirements already covered by separation elements and standardised process connections. 4.3 X
Process connection requires a sufficiently tight joint: IP66 added alternatively to IP67 4.3
X
Requirement for isolated conductive components deleted (now covered in EN 60079-0) 4.4 (ed.2) X
Requirements for non-conductive enclosures deleted (now covered in EN 60079-0) 4.5 (ed.2) X
Test of partition walls according to 4.1.3.2 b) is specified in more detail 5.2
C1 Marking example for associated apparatus deleted 6.2 b) X
Note 3 with an additional example added 6.2 X
Specification of material of partition wall required in instructions (also required in 4.1.3.2) 7 X
Alternative risk assessment method deleted (is now generally introduced) Annex A (ed.2) X
NOTE
The technical changes referred to include the significance of technical changes in the revised EN standard, but they do not form an exhaustive list of all modifications from the previous version. More guidance may be found by referring to the Redline Version of the standard. SIST EN 60079-26:2015

These are changes which modify requirements in an editorial or a minor technical way. They include changes
of the wording to clarify technical requirements without any technical change, or a reduction in level of existing requirement.
2) Extension: Addition of technical options
These are changes which add new or modify existing technical requirements, in a way that new options are given, but without increasing requirements for equipment that was fully compliant with the previous standard. Therefore, these will not have to be considered for products in conformity with the preceding edition.
3) Major technical change:
- addition of technical requirements - increase of technical requirements
These are changes to technical requirements (addition, increase of the level or removal) made in a way that a product in conformity with the preceding edition will not always be able to fulfil the requirements given in the later edition. These changes have to be considered for products in conformity with the preceding edition. For these changes additional information is provided in Clause B) below.
NOTE: These changes represent current technological knowledge. However, these changes should not normally have an influence on equipment already placed on the market.
B) Information about the background of ‘Major Technical Changes’ C1 –
Introduction of type tests for separation elements according to “4.1.3.2 b)” SIST EN 60079-26:2015

IEC 60079-26 Edition 3.0 2014-10 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres –
Part 26: Equipment with Equipment Protection Level (EPL) Ga
Atmosphères explosives – Partie 26: Matériel d'un niveau de protection du matériel (EPL) Ga
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE Q ICS 29.260.20 PRICE CODE CODE PRIX ISBN 978-2-8322-1903-4
– 2 – IEC 60079-26:2014 © IEC 2014
CONTENTS
FOREWORD . 3 1 Scope . 6 2 Normative references. 6 3 Terms and definitions . 7 4 Requirements for design and construction . 7 4.1 Protection measures against ignition hazards of the electrical circuits . 7
General . 7 4.1.1 Application of two independent Types of Protection providing EPL Gb . 7 4.1.2 Application of a Type of Protection providing EPL Gb and a separation 4.1.3element . 8 4.2 Equipment with moving parts . 12
Frictional heating . 12 4.2.1 Damage arising from failure of moving parts . 12 4.2.2 Light metals . 12 4.2.34.3 Process connection . 13 5 Type tests . 13 5.1 Standardized types of protection . 13 5.2 Separation elements . 13 5.3 Temperature evaluation . 13 6 Marking . 14 6.1 General . 14 6.2 Examples of marking . 14 7 Instructions. 14 7.1 Separation elements: . 14 7.2 Process connection: . 15 7.3 EPL allocation . 15 Bibliography . 16
Figure 1 – Example of a partition wall with a conductor bushing
considered as gas diffusion tight . 9 Figure 2 – Example of a separation element
with a cylindrical shaft joint and naturalventilation . 12
Table 1 – Separation elements . 11
IEC 60079-26:2014 © IEC 2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
EXPLOSIVE ATMOSPHERES –
Part 26: Equipment with Equipment Protection Level
(EPL) Ga
FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Commit
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