【正文】 mechanical or thermal damage as a consequence of internal reactions. This risk should be excluded for level of protection ―ma‖ apparatus. 。+ ( * .% / ―m‖ apparatus of level of protection ―ma‖ shall not be capable of causing ignition in each of the following circumstances: a) in normal operation and installation conditions。 * $ %* + ( If required, ―m‖ apparatus shall be grouped and classified in accordance with Clauses 4 and 5 of IEC 600790. 2 。 $ unintentional space created as a consequence of the encapsulation process J ( * intentionally created space surrounding ponents or space inside ponents K L ? 39。 ( ? %* $ range of temperatures within which the properties of the pound, in either operation or storage, permit pliance with the requirements of this standard Page 7 EN 60079?18:2020 * 39。 ( ( 0 amp。 ( ( ! 0 amp。 ( , amp。 ( Page 6 EN 60079?18:2020 IE C 606641:1992, + + ! % Amendment 1 (2020) Amendment 2 (2020) IE C 60691, * amp。 IE C 600861, ( ! IE C 60127 (all parts), ) IE C 602431, * ! * + IE C 60622, , ( amp。 ( 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 the referenced document (including any amendments) applies. IE C 600790:?, IE C 600797:2020, IE C 6007911:1999, !! IE C 6007926:?, $ % amp。 39。r Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B 1050 Brussels 169。en de Normalisation Electrotechnique Europ228。fung und Kennzeichnung elektrischer Betriebsmittel mit der Schutzart Vergusskapselung m (IEC 6007918:2020) This European Standard was approved by CENELEC on 20200401. CENELEC members are bound to ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptodate lists 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 responsibility 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 mittees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit233。r gasexplosionsgef228。riels 233。lectrique pour atmosph232。ISCHE NORM April 2020 ICS Supersedes EN 50028:1987 English version Electrical apparatus for explosive gas atmospheres Part 18: Construction, test and marking of type of protection encapsulation m electrical apparatus (IEC 6007918:2020) Mat233。 BSI August 2020 ISBN 0 580 43703 5 Amendments issued since publication EUROPEAN STANDARD EN 6007918 NORME EUROP201。 — present to the responsible international/European mittee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed。如果買家 需要 PDF 格式的本標準，可以 提供郵箱給我（前提是購買了本標準） ，我免費發(fā)送到你的郵箱。 標 標 準 王 國 網(wǎng) 標準 下載地址 BRITISH STANDARD BS EN 6007918:2020 Incorporating Corrigenda Nos. 1, 2 and 3 Electrical apparatus for explosive gas atmospheres — Part 18: Construction, test and marking of type of protection encapsulation ―m‖ electrical apparatus The European Standard EN 6007918:2020 has the status of a British Standard ICS Amd. No. Date Comments 15194 Corrige n du m No. 1 26 May 2020 Insertion of missing page (page 24) and the renumbering of subsequent pages 15208 Corrige n du m No. 2 7 June 2020 Correction to pages 24 and 25 16393 Corrigend um No. 3 August 2020 Incorporates Annex ZZ and corrects foreword BS EN 6007918:2020 National foreword This British Standard is the official English language version of EN 6007918:2020, incorporating Corrigendum April 2020. It is identical with IEC 6007918:2020. It supersedes BS 55018:1988 which remains current as obsolescent but will be wit