1、BSI Standards PublicationExplosive atmospheresPart 33: Equipment protection by special protection sPD CLC/TR 60079-33:2015Incorporating corrigendum January 2016PD CLC/TR 60079-33:2015 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementation ofPD CLC/TR 60079-33:2015. It is
2、 identical to IEC 60079-33:2012. Itsupersedes BS IEC 60079-33:2012 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EXL/31, Equipment for explosive atmospheres.A list of organizations represented on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 on request to its secret
3、ary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 93194 9ICS 29.260.20Compliance with a British Standard cannot c
4、onfer immunity from legal obligations.This Published Document was published under the authority of the Standards Policy and Strategy Committee on 30 November 2013.Amendments/corrigenda issued since publicationDate Text affected31 May 2015 This corrigendum renumbers BS IEC 60079-33:2012 as PD CLC/TR
5、60079-33:201531 January 2016 Correction to CEN foreword pageTECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CLC/TR 60079-33 April 2015 ICS 29.260.20 English Version Explosive atmospheres - Part 33: Equipment protection by special protection s (IEC 60079-33:2012) Atmosphres explosives - Partie
6、 33: Protection du matriel par protection spciale “s“ (IEC 60079-33:2012) Explosionsgefhrdete Bereiche - Teil 33: Gerteschutz durch Sonderschutz “s“ (IEC 60079-33:2012) This Technical Report was approved by CENELEC on 2014-06-02. CENELEC members are the national electrotechnical committees of Austri
7、a, 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,
8、 Sweden, Switzerland, Turkey and the United Kingdom. European Committee for 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 ex
9、ploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. CLC/TR 60079-33:2015 E CLC/TR 60079-33:2015 - 2 - Foreword This document (CLC/TR 60079-33:2015) consists of the text of IEC 60079-33:2012 prepared by IEC/TC 31 “Equipment for explosive atmospheres “. Attention i
10、s 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. Endorsement notice The text of the International Standard IEC 60079-33:2012 was approved by CENEL
11、EC as a European Standard without any modification. 2 PD CLC/TR 60079-33:2015CLC/TR 60079-33:2015In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60079-26 NOTE Harmonized as EN 60079-26. IEC 60079-1 NOTE Harmonized as EN 60079-1. IEC 60
12、079-11 NOTE Harmonized as EN 60079-11. IEC 60079-29-3 NOTE Harmonized as EN 60079-29-3. IEC 60079-15 NOTE Harmonized as EN 60079-15. IEC 60079-2 NOTE Harmonized as EN 60079-2. IEC 60079-18 NOTE Harmonized as EN 60079-18. IEC 60079-7 NOTE Harmonized as EN 60079-7. IEC 60228 NOTE Harmonized as EN 6022
13、8. IEC 60079-10-1 NOTE Harmonized as EN 60079-10-1. IEC 60079-10-2 NOTE Harmonized as EN 60079-10-2. IEC 60079-14 NOTE Harmonized as EN 60079-14. IEC 60079-1 NOTE Harmonized as EN 60079-1. IEC 60300 (Series) NOTE Harmonized as EN 60300 (Series). ISO/IEC 80079 (Series) NOTE Harmonized as EN ISO/IEC 8
14、0079 (Series). - 3 - CLC/TR 60079-33:2015 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 da
15、ted 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-d
16、ate 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 EN 60079-0 - - - +A11 - IEC 60079 series Explosive atmospheres EN
17、60079 series IEC 60079-29-1 - Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases EN 60079-29-1 - IEC 60079-29-2 2007 Explosive atmospheres - Part 29-2: Gas detectors - Selection, installation, use and maintenance of detectors for flammable ga
18、ses and oxygen EN 60079-29-2 2007 - - +corrigendum Dec. 2007 IEC 61508-1 - Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 1: General requirements EN 61508-1 - IEC 61508 series Functional safety of electrical/electronic/programmable electronic safety-
19、related systems EN 61508 series IEC 61511 series Functional safety - Safety instrumented systems for the process industry sector EN 61511 series IEC 62061 - Safety of machinery - Functional safety of safety-related electrical, electronic and programmable electronic control systems EN 62061 - - - +co
20、rrigendum Feb. - ISO 13849-1 2006 Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design EN ISO 13849-1 2008 ISO 13849-2 - Safety of machinery_- Safety-related parts of control systems_- Part_2: Validation EN ISO 13849-2 - 3 PD CLC/TR 60079-33:2015CLC/T
21、R 60079-33:2015 2 60079-33 IEC:2012 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope . 9 2 Normative references . 9 3 Terms and definitions . 10 4 General 11 4.1 Application 11 4.2 Equipment group and temperature classification 11 4.3 Level of protection (equipment protection level (EPL) . 11 4.4 Manu
22、facturers justification 12 4.5 Verification 12 5 Independent verifier 12 5.1 General . 12 5.2 Competence 12 5.3 Duties 13 5.4 Acceptance . 13 5.5 Independence 13 6 Design and construction . 13 6.1 Principles of an integrated approach to explosion safety . 13 6.2 Design and construction 14 6.3 Overlo
23、ading of equipment 14 6.4 Potential ignition sources 14 6.4.1 Hazards arising from different ignition sources 14 6.4.2 Hazards arising from overheating 14 6.4.3 Hazards arising from pressure compensation operations . 14 6.5 Requirements in respect of safety-related devices . 14 7 Application of equi
24、pment protection levels (EPL) 15 7.1 Equipment with EPL Ma 15 7.2 Equipment with EPL Mb 15 7.3 Equipment with EPL Ga . 16 7.4 Equipment with EPL Gb . 17 7.5 Equipment with EPL Gc . 17 7.6 Equipment with EPL Da . 17 7.7 Equipment with EPL Db . 18 7.8 Equipment with EPL Dc . 18 8 Preparation of assess
25、ment and test specification . 18 8.1 General . 18 8.2 Assessment and test specification . 19 8.3 Assessment and testing. 19 8.4 Reporting results of the assessment and test specification 19 9 Ignition hazard assessment 19 9.1 General . 19 9.2 Protective measures 19 9.3 Explanation of the ignition ha
26、zard assessment procedure 20 9.4 Examples of ignition hazard assessment . 20 10 Application of special protection “s” 20 BS IEC 60079-33:2012PD CLC/TR 60079-33:201560079-33 IEC:2012 4 68111112131313131414141414151515151516161616161616171717181919192020202021212121212121212160079-33 IEC:2012 3 10.1 G
27、eneral . 20 10.2 Justification for the application of special protection “s” . 20 10.2.1 Application 20 10.2.2 Equipment substantially meeting the requirements for the recognized types of protection . 21 10.2.3 Equipment outside the scope of recognized types of protection . 21 10.2.4 Protection tech
28、nique with no alignment to the recognized types of protection 21 10.2.5 Enhanced EPL through additional means of protection 22 10.2.6 Combination of approaches . 22 10.3 Adaption of recognized types of protection 22 10.4 Other innovative means of ensuring safety 22 10.5 Connection of conductor and c
29、ables 22 11 Type verification and tests 23 11.1 General . 23 11.2 Temperature measurement test . 23 12 Routine verification and test . 23 13 Documentation . 23 14 Ex components . 23 15 Marking 23 15.1 General . 23 15.2 Marking for Ex “s” only 23 15.3 Marking for Ex “s” with other recognized types of
30、 protection 23 16 Certificate information 24 16.1 Certificate for Ex “s” only . 24 16.2 Certificate for Ex “s” with other recognized types of protection 24 16.3 Specific conditions of use 24 16.4 Schedule of limitations 24 17 Instructions . 24 Annex A (informative) Explanation of the ignition hazard
31、 assessment procedure 25 Annex B (informative) Examples of ignition hazard assessment . 31 Bibliography 37 Figure A.1 Relationship between ignitions source definitions . 26 Table A.1 Recommended documentation of initial assessment of equipment related ignition sources. 27 Table A.2 Example for repor
32、ting identification of ignition hazards (step 1) and first assessment (step 2) 28 Table A.3 Example for reporting determination of preventive or protective measures (step 3) and concluding estimation and EPL assignment (step 4) . 29 Table B.1 Common cases demonstrating the use of the reporting metho
33、d Electrostatic discharge 33 Table B.2 Ignition hazard assessment report for a linear motor with permanent magnets in the table-track, EPL Gb, in addition to the basic requirements of IEC 60079-0 (for example material characteristics, electrostatic, earthing) 35 BS IEC 60079-33:2012PD CLC/TR 60079-3
34、3:201560079-33 IEC:2012 5 222222232323242424242425252525252525252525262626262626273339282930313537 4 60079-33 IEC:2012 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ EXPLOSIVE ATMOSPHERES Part 33: Equipment protection by special protection “s” FOREWORD 1) The International Electrotechnical Commission (
35、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 addit
36、ion 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 interest
37、ed 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
38、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
39、 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 t
40、he 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 an
41、y 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 conformi
42、ty. 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
43、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 an
44、y 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 b
45、e the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60079-33 has been prepared by IEC technical committee 31: Equipment for explosive atmospheres. The text of this standard is based on the following documents: FD
46、IS Report on voting 31/997/FDIS 31/1011/RVDFull 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 ser
47、ies, published under the general title Explosive atmospheres, can be found on the IEC website. BS IEC 60079-33:2012PD CLC/TR 60079-33:201560079-33 IEC:2012 6 60079-33 IEC:2012 5 The committee has decided that the contents of this publication will remain unchanged until the stability date indicated o
48、n 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. BS IEC 60079-33:2012PD CLC/TR 60079-33:201560079-33 IEC:2012 7 6 60079-33 IEC:2012 INTRODUCTION T
49、his part of IEC 60079 was created in response to a request from the IECEx certification system to provide a set of requirements to be used for certification within the IECEx product certification scheme when the standards for existing types of protection were not applicable. The present standard refers to the use of one or more independent verifiers, in accordance with ISO/IEC rules on the writing of standards that mitigate against specifying particular forms of
