1、BSI Standards PublicationExplosive atmospheres Part 25: Intrinsically safe electrical systemsBS EN 60079-25:2010Incorporating corrigendum September 2013BS EN 60079-25:2010National forewordThis British Standard is the UK implementation of EN 60079-25:2010, incorporating corrigendum September 2013. It
2、 is identical to IEC 60079-25:2010. It supersedes BS EN 60079-25:2004 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee EXL/31, Equipment for explosive atmospheres, to Subcommittee EXL/31/2, Intrinsically safe apparatus.A list of organizations represente
3、d on this subcommittee can be obtained on request to its secretary.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 2013. Published by BSI Standards Limited 2013ISBN 978 0 580
4、 84578 9ICS 13.230; 29.260.20Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2010.Amendments/corrigenda issued since publicationDate Text affected31
5、October 2013 Implementation of CENELEC corrigendum September 2013: Supersession information on CENELEC title and foreword pages updatedBRITISH STANDARDEUROPEAN STANDARD EN 60079-25 NORME EUROPENNE EUROPISCHE NORM October 2010 CENELEC European Committee for Electrotechnical Standardization Comit Euro
6、pen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60079-25:2010 E ICS 29.260.20 Super
7、sedes EN 60079-25:2004 and EN 50394-1:2004English version Explosive atmospheres - Part 25: Intrinsically safe electrical systems (IEC 60079-25:2010) Atmosphres explosives - Partie 25: Systmes lectriques de scurit intrinsque (CEI 60079-25:2010) Explosionsfhige Atmosphre - Teil 25: Eigensichere System
8、e (IEC 60079-25:2010) This European Standard was approved by CENELEC on 2010-10-01. 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 list
9、s 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 re
10、sponsibility 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, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Fra
11、nce, 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. EN 60079-25:2010 - ii - Foreword The text of document 31G/202/FDIS, future edition
12、2 of IEC 60079-25, prepared by SC 31G, Intrinsically-safe apparatus, of IEC TC 31, Equipment for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60079-25 on 2010-10-01. This European Standard supersedes EN 60079-25:2004 and EN 50394-1:2004. The
13、 significant changes with respect to EN 60079-25:2004 are: extension of the scope from Group II to Groups I, II and III; introduction of level of protection “ic“; addition of requirements for cables and multi-core cables; reference to EN 60079-11 regarding the termination of intrinsically safe circu
14、its; requirements for the assessment of an expanded and clarified intrinsically safe system regarding level of protection “ic“, simple apparatus and faults in multi-core cables; introduction of predefined systems and merging of the system requirements for FISCO from EN 60079-27; addition of requirem
15、ents for simple intrinsically safe systems containing both lumped inductance and lumped capacitance; addition of a method for testing the electrical parameters of cables; additional information for the use of simple apparatus in systems. Attention is drawn to the possibility that some of the element
16、s of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. 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
17、 by endorsement (dop) 2011-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-10-01 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
18、 requirements of EC Directive 94/9/EC. See Annex ZZ. Annexes ZA and ZZ have been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60079-25:2010 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the fol
19、lowing note has to be added for the standard indicated: IEC 60529 NOTE Harmonized as EN 60529. _ BS EN 60079-25:2010- iii - EN 60079-25:2010 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are i
20、ndispensable 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, indicat
21、ed by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60060-1 - High-voltage test techniques - Part 1: General definitions and test requirements EN 60060-1 - IEC 60079-0 - Explosive atmospheres - Part 0: Equipment - General requirements EN 60079-0 - IEC 60079-11 2006 Explosi
22、ve atmospheres - Part 11: Equipment protection by intrinsic safety “i“ EN 60079-11 2007 IEC 60079-14 2007 Explosive atmospheres - Part 14: Electrical installations design, selection and erection EN 60079-14 2008 IEC 60079-15 - Explosive atmospheres Part 15: Equipment protection by type of protection
23、 “n“ EN 60079-15 - IEC 60079-27 2008 Explosive atmospheres - Part 27: Fieldbus intrinsically safe concept (FISCO) EN 60079-27 2008 IEC 61158-2 - Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition EN 61158-2 - IEC 61241-0 - Electr
24、ical apparatus for use in the presence of combustible dust - Part 0: General requirements EN 61241-0 - IEC 61241-11 - Electrical apparatus for use in the presence of combustible dust - Part 11: Protection by intrinsic safety iD EN 61241-11 - BS EN 60079-25:2010EN 60079-25:2010 - iv - Annex ZZ (infor
25、mative) Coverage of essential requirements of the directive 94/9/EC 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 safety requirements o
26、ut of those given in Annex II of the EC Directive 94/9/EC: 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 sco
27、pe of this standard. ESR Equivalent requirement in EN 60079-25:2010 1.0.1 fundamental basis of standard 1.0.2 Fundamental principle of intrinsic safety technique applied throughout this standard and apparatus standard EN 60079-11 and EN 60079-0 1.0.3 Requirement primarily met by apparatus standard E
28、N 60079-11 and the maintenance requirements specified in EN 60079-14 and EN 60079-17. 1.0.4 EN 60079-0 Clause 5, Subclauses 6.1, 6.2, 7.2 and 7.3 1.0.5 Clause 14, EN 60079-0 Clause 29 and Foreword 1.0.6 a Clause 4 1.1.1 EN 60079-0 Clause 8.1 1.1.3 EN 60079-0 Clause 7, 8, 12 1.2.1 The system and appa
29、ratus standards represent the latest state of the art 1.2.2 Requirement met by apparatus standard, EN 60079-0 Clause 13 and clause 13.2 of this standard 1.2.4 Clause 5 also covers Group III, details in EN 60079-0 and EN 60079-11 1.2.6 Covered by EN 60079-11 1.3.1 Sparks and hot surfaces covered in C
30、lause 13 and in EN 60079-11. Other potential ignition sources covered in EN 60079-0 1.3.2 EN 60079-0, Subclause 7.4 1.3.3 to 1.3.5 EN 60079-0 1.4 EN 60079-0 and EN 60079-11 2.0.1 and 2.0.2 ia apparatus and systems in accordance with EN 60079-11 and this standard meet the two fault criterion (M1) and
31、 ib apparatus and systems in accordance with EN 60079-11 and this standard meet the one fault criterion (M2) and the other criterions 2.1.1 and 2.1.2 ia apparatus and systems in accordance with EN 60079-11/EN 61241-11 and this standard meet the two fault criterion (1G and 1D) and the other criterion
32、s 2.2.1 and 2.2.2 ib apparatus and systems in accordance with EN 60079-11/EN 61241-11 and this standard meet the one fault criterion (2G and 2D) and the other criterions 2.3.1 and 2.3.2 ic apparatus and systems in accordance with EN 60079-11/EN 61241-11 and this standard meet the safe in normal oper
33、ation criterion (3G and 3D) and the other criterions BS EN 60079-25:2010 4 60079-25 IEC:2010 CONTENTS 1 Scope.6 2 Normative references .6 3 Terms, definitions and abbreviations 7 3.1 Terms and definitions 7 3.2 Abbreviations 8 4 Descriptive system document .8 5 Grouping and classification.9 6 Levels
34、 of protection 9 6.1 General .9 6.2 Level of protection “ia”.9 6.3 Level of protection “ib”.9 6.4 Level of protection “ic”.9 7 Ambient temperature rating 10 8 Interconnecting wiring / cables used in an intrinsically safe electrical system .10 9 Requirements of cables and multi-core cables10 9.1 Gene
35、ral .10 9.2 Multi-core cables.10 9.3 Electrical parameters of cables11 9.4 Conducting screens.11 9.5 Types of multi-core cables.11 9.5.1 General .11 9.5.2 Type A cable .11 9.5.3 Type B cable .11 9.5.4 Type C cable .11 10 Termination of intrinsically safe circuits 11 11 Earthing and bonding of intrin
36、sically safe systems12 12 Protection against lightning and other electrical surges 12 13 Assessment of an intrinsically safe system .13 13.1 General .13 13.2 Simple apparatus 14 13.3 Analysis of inductive circuits15 13.4 Faults in multi-core cables.15 13.4.1 Type of multi-core cables.15 13.4.2 Type
37、A cable .15 13.4.3 Type B cable .15 13.4.4 Type C cable .16 13.5 Type verifications and type tests .16 14 Marking 16 15 Predefined systems 16 Annex A (informative) Assessment of a simple intrinsically safe system.17 Annex B (normative) Assessment of circuits with more than one source of power 20 Ann
38、ex C (informative) Interconnection of non-linear and linear intrinsically safe circuits 23 Annex D (normative) Verification of inductive parameters 59 BS EN 60079-25:201060079-25 IEC:2010 5 Annex E (informative) A possible format for descriptive systems drawings and installation drawings .61 Annex F
39、 (informative) Surge protection of an intrinsically safe circuit.64 Annex G (normative) Testing of cable electrical parameters.67 Annex H (informative) Use of simple apparatus in systems 69 Annex I (normative) FISCO systems 71 Bibliography74 Figure 1 Systems analysis .14 Figure 2 Typical system usin
40、g simple apparatus 15 Figure B.1 Sources of power connected in series.21 Figure B.2 Sources of power connected in parallel.22 Figure B.3 Sources of power not deliberately connected 22 Figure C.1 Equivalent circuit and output characteristic of resistive circuits .24 Figure C.2 Current and/or voltage
41、addition for interconnections .26 Figure C.3 Output characteristic and equivalent circuit of a source with trapezoidal characteristic 29 Figure C.4 Example of an interconnection33 Figure C.5 Sum characteristics for the circuit as given in Figure C.435 Figure C.6 Current and/or voltage addition for t
42、he example given in Figure C.4 .36 Figure C.7 Limit curve diagram for universal source characteristic Group IIC 47 Figure C.8 Limit curve diagram for universal source characteristic Group IIB 57 Figure C.9 Copy pattern for universal source diagrams58 Figure D.1 Typical inductive circuit 60 Figure E.
43、1 Typical block diagram for IS system descriptive system document62 Figure E.2 Typical installation drawing for IS system .63 Figure F.1 Surge protection requirements of an instrument loop 66 Figure I.1 Typical system .73 Table A.1 Simple system analysis19 Table C.1 Parameters necessary to describe
44、the output characteristic.28 Table C.2 Assignment of diagrams to equipment groups and inductances31 BS EN 60079-25:2010 6 60079-25 IEC:2010 EXPLOSIVE ATMOSPHERES Part 25: Intrinsically safe electrical systems 1 Scope This part of IEC 60079 contains the specific requirements for construction and asse
45、ssment of intrinsically safe electrical systems, type of protection “i”, intended for use, as a whole or in part, in locations in which the use of Group I, II or III apparatus is required. NOTE 1 This standard is intended for use by the designer of the system who may be a manufacturer, a specialist
46、consultant or a member of the end-users staff. This standard supplements and modifies the general requirements of IEC 60079-0 and the intrinsic safety standard IEC 60079-11. Where a requirement of this standard conflicts with a requirement of IEC 60079-0 or IEC 60079-11, the requirement of this stan
47、dard takes precedence. This standard supplements IEC 60079-11, the requirements of which apply to electrical apparatus used in intrinsically safe electrical systems. The installation requirements of Group II or Group III systems designed in accordance with this standard are specified in IEC 60079-14
48、. NOTE 2 Group I installation requirements are presently not provided in IEC 60079-14. 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
49、 the referenced document (including any amendments) applies. IEC 60060-1, High-voltage test techniques Part 1: General definitions and test requirements IEC 60079-0, Explosive atmospheres Part 0: Equipment General requirements IEC 60079-11:2006, Explosive atmospheres Part 11: Equipment protection by intrinsic safety “i” IEC 60079-14:2007, Explosive atmospheres Part 14: Electrical installations design, selection and erection IEC 60079-1
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