1、BSI Standards PublicationExplosive atmospheresPart 26: Equipment with Equipment Protection Level (EPL) GaBS EN 60079-26:2015National forewordThis British Standard is the UK implementation of EN 60079-26:2015. It isidentical to IEC 60079-26:2014. It supersedes BS EN 60079-26:2007 which iswithdrawn.Th
2、e UK participation in its preparation was entrusted to TechnicalCommittee EXL/31, Equipment for explosive atmospheres.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contrac
3、t. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82843 0ICS 29.260.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authori
4、ty of theStandards Policy and Strategy Committee on 31 January 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60079-26:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60079-26 January 2015 ICS 29.260.20 Supersedes EN 60079-26:2007 English Version
5、Explosive atmospheres - Part 26: Equipment with Equipment Protection Level (EPL) Ga (IEC 60079-26:2014) Atmosphres explosives - Partie 26: Matriel dun niveau de protection du matriel (EPL) Ga (IEC 60079-26:2014) Explosionsgefhrdete Bereiche - Teil 26: Betriebsmittel mit Gerteschutzniveau (EPL) Ga (I
6、EC 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 an
7、d 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
8、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, Eston
9、ia, 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 f
10、or Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr 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 Me
11、mbers. Ref. No. EN 60079-26:2015 E BS EN 60079-26:2015EN 60079-26:2015 - 2 - Foreword The text of document 31/1146/FDIS, future edition 3 of IEC 60079-26, prepared by IEC/TC 31 “Equipment for explosive atmospheres“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60079-26
12、: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) 201
13、7-12-02 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 und
14、er 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
15、 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 E
16、N 60079-14. IEC 60079-18 NOTE Harmonized as EN 60079-18. BS 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 d
17、ocument 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, indic
18、ated 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 60
19、079-1 - 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
20、-10 - Fire hazard testing - Part 11-10: Test flames - 50 W horizontal and vertical flame test methods EN 60695-11-10 - BS EN 60079-26:2015EN 60079-26:2015 - 4 - Annex ZZ (informative) Coverage of Essential Requirements of EU Directives This European Standard has been prepared under a mandate given t
21、o 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.
22、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 Directives concerned. WARNING: Other
23、requirements and other EU Directives may be applicable to the products falling within the scope of this standard. BS 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 60079-26:200
24、7. 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 mechani
25、cal 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 Encapsul
26、ation 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
27、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 partiti
28、on 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
29、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 referri
30、ng to the Redline Version of the standard. BS EN 60079-26:2015EN 60079-26:2015 - 6 - Explanations: A) Definitions 1) Minor and editorial changes: - clarification - decrease of technical requirements - minor technical change - editorial corrections These are changes which modify requirements in an ed
31、itorial 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
32、, 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 requ
33、irements - 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 ha
34、ve 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
35、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)” BS EN 60079-26:2015 2 IEC 60079-26:2014 IEC 2014 CONTENTS 1 Scope 6 2 Normative references. 6 3 Terms and definitions 7 4 Requirements for des
36、ign and construction 7 4.1 Protection measures against ignition hazards of the electrical circuits 7 General . 7 4.1.1Application of two independent Types of Protection providing EPL Gb . 7 4.1.2Application of a Type of Protection providing EPL Gb and a separation 4.1.3element . 8 4.2 Equipment with
37、 moving parts . 12 Frictional heating . 12 4.2.1Damage arising from failure of moving parts . 12 4.2.2Light 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
38、 . 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 cyli
39、ndrical shaft joint and naturalventilation 12 Table 1 Separation elements 11 BS EN 60079-26:2015 6 IEC 60079-26:2014 IEC 2014 EXPLOSIVE ATMOSPHERES Part 26: Equipment with Equipment Protection Level (EPL) Ga 1 Scope This part of IEC 60079 specifies alternative requirements for construction, test and
40、 marking for electrical equipment that provides Equipment Protection Level (EPL) Ga when single standardised Types of Protection (e.g. Ex “ia” , Ex “ma”, Ex “da”) cannot be applied. This standard also applies to equipment mounted across a boundary where different Equipment Protection Levels may be r
41、equired. EXAMPLE: Equipment installed in the wall of a storage vessel containing Zone 0 (requiring EPL Ga) inside an area defined as Zone 1 (requiring EPL Gb). This electrical equipment, within the operational parameters specified by the manufacturer, ensures a very high Level of Protection that inc
42、ludes rare malfunctions related to the equipment or two malfunctions occurring independently of each other. NOTE A malfunction may result from a failure of the component parts of the electrical equipment or from anticipated externally applied influences. Two independent malfunctions which may occur
43、more frequently and which, separately, would not create an ignition hazard but which, in combination, could create a potential ignition hazard, are regarded as occurring together to form a rare malfunction. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requi
44、rement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence. 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, on
45、ly 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 60079-1, Explosive atmospheres Part 1: Equipment protection by flameproof enclosures “
46、d“ IEC 60079-11, Explosive atmospheres Part 11: Equipment protection by intrinsic safety “i“ IEC 60695-11-10, Fire hazard testing Part 11-10: Test flames 50 W horizontal and vertical flame test methods IEC 60529, Degrees of protection provided by enclosures (IP Code) BS EN 60079-26:2015IEC 60079-26:
47、2014 IEC 2014 7 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60079-0 and the following apply. NOTE Additional definitions applicable to explosive atmospheres can be found in IEC 60050-426. 3.1 separation element mechanical element inside the equip
48、ment, which separates different parts of the equipment with different EPLs Note 1 to entry: A separation element consists of a mechanical partition wall, which may be combined with a flameproof joint or a natural ventilation 4 Requirements for design and construction 4.1 Protection measures against
49、ignition hazards of the electrical circuits General 4.1.1The equipment shall comply with the requirements of 4.1.2 or 4.1.3 in the event of a failure of one equipment means of protection, by the provision of a second independent means of protection. NOTE 1 Types of Protection according to EPL Ga do not require a second independant means of protection, e.g. Ex “ia” (IEC 60079-11), Ex “ma” (IEC 60079-18), Ex “da” (IEC 60079-1). Electrical connections and permanently connected cabl
