1、 IEC 60079-26 Edition 3.0 2014-10 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres Part 26: Equipment with Equipment Protection Level (EPL) Ga Atmosphres explosives Partie 26: Matriel dun niveau de protection du matriel (EPL) Ga IEC 60079-26:2014-10(en-fr) THIS PUBLICATION IS COPYRI
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19、des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60079-26 Edition 3.0 2014-10 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres Part 26: Equipment with Equipment Protection Level (EPL) Ga Atmosphres explosives Partie 26: Matriel dun
20、niveau de protection du matriel (EPL) Ga INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE Q ICS 29.260.20 PRICE CODE CODE PRIX ISBN 978-2-8322-1903-4 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechniq
21、ue Internationale 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 agr. 2 IEC 60079-26:2014 IEC 2014 CONTENTS FOREWORD . 3 1 Scope 6 2 Normative references. 6 3 Terms and
22、definitions 7 4 Requirements for design and construction 7 4.1 Protection measures against ignition hazards of the electrical circuits 7 General . 7 4.1.1Application of two independent Types of Protection providing EPL Gb . 7 4.1.2Application of a Type of Protection providing EPL Gb and a separation
23、 4.1.3 element . 8 4.2 Equipment with moving parts . 12 Frictional heating . 12 4.2.1Damage arising from failure of moving parts . 12 4.2.2Light metals . 12 4.2.3 4.3 Process connection . 13 5 Type tests . 13 5.1 Standardized types of protection . 13 5.2 Separation elements . 13 5.3 Temperature eval
24、uation . 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 Examp
25、le 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
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35、on, 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
36、 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 60079-26 has been prepared by IEC technical committee 31: Equipment for explosive atmospheres. This third edition cancels and repl
37、aces the second edition published in 2006 and constitutes a technical revision. 4 IEC 60079-26:2014 IEC 2014 This edition includes the following significant changes with respect to the previous edition: Type Changes Clause Minor and editorial changes Extension Major technical changes Notes deleted 1
38、 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 IEC 60079-0) 4.1 X Requirement for separation element detailed regarding external influences 4.1.3.2 X Intrinsic sa
39、fety 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” dele
40、ted 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 IEC 6007
41、9-0) 4.4 (ed.2) X Requirements for non-conductive enclosures deleted (now covered in IEC 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 Sp
42、ecification 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) AnnexA (ed.2) X NOTE The technical changes referred to include the significance of technical changes in the revised IEC Standard,
43、 but they do not form an exhaustive list of all modifications from the previous version. Explanation of the types of changes: A) Definitions 1) Minor and editorial changes: Clarification Decrease of technical requirements Minor technical change Editorial corrections These are changes which modify re
44、quirements 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. IEC 60079-26:2014 IEC 2014 5 2) Extension: Addition of technical options These are changes which a
45、dd 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
46、 technical changes: 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
47、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
48、 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)” The text of this standard is based on the following documents: FDIS Report on voting 31/1146/FDIS 3
49、1/1155/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 parts in the IEC 60079 series, published under the general title Explosive atmospheres, can be found on the IEC website. The committee has decided that the contents of this publication will remai
