1、 IEC 60079-5 Edition 4.0 2015-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres Part 5: Equipment protection by powder filling “q” Atmosphres explosives Partie 5: Protection du matriel par remplissage pulvrulent “q” IEC 60079-5:2015-02(en-fr) THIS PUBLICATION IS COPYRIGHT PROTECTE
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19、ires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60079-5 Edition 4.0 2015-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres Part 5: Equipment protection by powder filling “q” Atmosphres explosives Partie 5: Protection du matriel par remplissa
20、ge pulvrulent “q” INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 29.260.20 ISBN 978-2-8322-2249-2 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you
21、obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 IEC 60079-5:2015 IEC 2015 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references. 6 3 Terms and definitions 7 4 Constructional requirements 7 4
22、.1 Containers 7 4.1.1 Closing and sealing 7 4.1.2 Pressure test of container 8 4.1.3 Degree of protection of the container 8 4.1.4 Filling procedure 8 4.1.5 Containers that are not external enclosures 8 4.2 Filling material 9 4.2.1 Material specification . 9 4.2.2 Documentation . 9 4.2.3 Testing 9 4
23、.3 Distances 9 4.3.1 Distances through filling material 9 4.3.2 Distances surrounding free space . 11 4.4 Connections 12 4.4.1 Equipment . 12 4.4.2 Ex Components . 12 4.5 Capacitors 12 4.6 Cells and batteries 12 4.7 Temperature limitations under overload conditions . 12 4.8 Temperature limitations u
24、nder malfunction conditions 12 4.8.1 General . 12 4.8.2 Fuse 12 4.8.3 Malfunction exclusions . 13 4.8.4 Protective devices for temperature limitation . 16 4.8.5 Power supply prospective short-circuit current 16 5 Verifications and tests . 16 5.1 Type verifications and tests . 16 5.1.1 Pressure type
25、test of container . 16 5.1.2 Verification of the degree of protection of the enclosure 17 5.1.3 Dielectric strength test of the filling material . 17 5.1.4 Maximum temperatures 17 5.2 Routine verifications and tests . 18 5.2.1 Routine pressure test of container 18 5.2.2 Dielectric strength test of t
26、he filling material . 18 6 Marking . 19 7 Instructions 20 Bibliography . 21 IEC 60079-5:2015 IEC 2015 3 Figure 1 Distances through filling material 11 Figure 2 Test arrangement for the dielectric strength test of the filling material . 19 Table 1 Distances through the filling material 10 Table 2 Cre
27、epage distances and distances through filling material 15 4 IEC 60079-5:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ EXPLOSIVE ATMOSPHERES Part 5: Equipment protection by powder filling “q” FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for s
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37、n 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 be the subject of patent rights. IEC s
38、hall not be held responsible for identifying any or all such patent rights. International Standard IEC 60079-5 has been prepared by IEC technical committee 31: Equipment for explosive atmospheres. This fourth edition cancels and replaces the third edition, published in 2007, and constitutes a techni
39、cal revision. This edition includes the following significant technical changes with respect to the previous edition: NOTE The technical changes referred to include the significant technical changes in the revised IEC standard, but they do not form an exhaustive list of all modifications from the pr
40、evious edition. More guidance may be found by referring to the redline version of the IEC standard, if available. IEC 60079-5:2015 IEC 2015 5 Type Significant changes Clause/subclause Minor and editorial changes Extension Major technical changes Specific references to IEC 60079-0 have been reworded
41、so the references to IEC 60079-0 can be non-dated references 4.1.3 4.8 4.8.3 X The “housing” surrounding the powder filled equipment or Ex Component has been redefined as a “container” to avoid confusion with the “enclosure” requirements of IEC 60079-0 4.1 X A relaxation has been introduced to permi
42、t reduced distances through filling material for instances where there is no adjacent gap in the container 4.3.1 X A relaxation has been introduced to permit the use of creepage dimensions per IEC 60079-7 where CTI is better than 175 4.8.3 X An evaluation of joints employed when the reduced distance
43、s according to Table 1 are applied, has been added. 5.1.1 X Text for determination of maximum temperature clarified with respect to overloads and malfunctions 5.1.4 X A batch routine test has been introduced 5.2.1 X The text of this standard is based on the following documents: FDIS Report on voting
44、 31/1156/FDIS 31/1171/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. The list of all parts of IEC 60079 series, under the gene
45、ral title Explosive atmospheres, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, t
46、he publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 6 IEC 60079-5:2015 IEC 2015 EXPLOSIVE ATMOSPHERES Part 5: Equipment protection by powder filling “q” 1 Scope This part of IEC 60079 contains specific requirements for the construction, testing and marking of el
47、ectrical equipment, parts of electrical equipment and Ex components in the type of protection powder filling “q”, intended for use in explosive gas atmospheres. NOTE 1 Electrical equipment and Ex components protected by powder filling “q” can contain electronic circuits, transformers, protection fus
48、es, relays, intrinsically safe electrical apparatus, associated electrical apparatus, switches, etc. NOTE 2 Type of protection powder filling “q” provides Equipment Protection Level (EPL) Gb or Mb. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of
49、 this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence. This standard applies to electrical equipment, parts of electrical equipment and Ex components with: a rated supply current less than or equal to 16 A; a rated supply voltage less than or equal to 1 000 V; a rated power consumption less than or equal to 1 000 W. 2 Normative references The following documents, in who
