IEC 60079-18:20 14+A1:2017给出了用于爆炸性气体环境或爆炸性粉尘环境的电气设备、电气设备零件和防爆组件的构造、测试和标记的具体要求。本部分仅适用于额定电压不超过11 kV的封装电气设备、电气设备的封装部件和封装ed Ex组件（以下始终称为“m”设备）。在可能同时含有爆炸性气体和可燃粉尘的环境中使用电气设备可能需要额外的保护措施。本标准不适用于不需要大气氧气燃烧的爆炸物粉尘或自燃物质。本标准不考虑粉尘中易燃或有毒气体排放的任何风险。本标准对IEC 60079-0的一般要求进行了补充和修改。当本标准的要求与IEC 60079-0的要求相冲突时，以本标准的要求为准。本第四版取消并取代了IEC 60079-18:20 09的第三版，构成技术修订。有关与上一版本相关的技术变更列表，请参考文档的前言。 本出版物应与IEC 60079-0:20 11一起阅读。该合并版本由第四版（2014年）及其修正案1（2017年）组成。因此，除本出版物外，无需下令修订。 关键词:封装“m”，爆炸性气体环境，爆炸性粉尘环境

IEC 60079-18:2014+A1:2017 gives the specific requirements for the construction, testing and marking of electrical equipment, parts of electrical equipment and Ex components with the type of protection encapsulation "m" intended for use in explosive gas atmospheres or explosive dust atmospheres. This part applies only for encapsulated electrical equipment, encapsulated parts of electrical equipment and encapsulat ed Ex components (hereinafter always referred to as "m" equipment) where the rated voltage does not exceed 11 kV. The application of electrical equipment in atmospheres, which may contain explosive gas as well as combustible dust simultaneously, may require additional protective measures. This standard does not apply to dusts of explosives, which do not require atmospheric oxygen for combustion, or to pyrophoric substances. This standard does not take account of any risk due to an emission of flammable or toxic gas from the dust. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence. This fourth edition cancels and replaces the third edition of IEC 60079-18:2009, and constitutes a technical revision. Please refer to the foreword of the document for a listing of the technical changes with respect to the previous edition.
This publication is to be read in conjunction with IEC 60079-0:2011. This consolidated version consists of the fourth edition (2014) and its amendment 1 (2017). Therefore, no need to order amendment in addition to this publication.

Keywords: encapsulation "m", explosive gas atmospheres, explosive dust atmospheres