爆炸性环境 第18部分：通过封装“m”进行设备保护

[中文适用范围]： IEC 60079-18:2009 RLV 包含官方 IEC 国际标准及其红线版本。 Redline 版本仅提供英文版本，为您提供了一种快速、简单的方法来比较官方 IEC 标准与其先前版本之间的所有更改。 IEC 60079-18:2009 给出了用于爆炸性气体环境或爆炸性粉尘环境中保护封装类型为“m”的电气设备、电气设备部件和 Ex 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、电气设备封装部件和封装防爆元件。相对于前一版本的重大技术变化如下： - 加入了防护等级“mc” - 设备防护等级（EPL Ma、Ga、Da、Mb、Gb、Db、Gc、Dc） - 加入了粉尘要求 - 结合防护等级“ma”的开关触点。本出版物应与 IEC 60079-0:2007 一起阅读。 2009 年 6 月更正的内容已包含在本副本中。 [外文原描述]： IEC 60079-18:2009 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60079-18:2009 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 encapsulated Ex components where the rated voltage does not exceed 11 kV. The significant technical changes with respect to the previous edition are as follows: - Incorporation of level of protection "mc" - Equipment protection levels (EPL Ma, Ga, Da, Mb, Gb, Db, Gc, Dc) - Incorporation of the dust requirements - Incorporation of switching contacts for level of protection "ma". This publication is to be read in conjunction with IEC 60079-0:2007 . The contents of the corrigendum of June 2009 have been included in this copy.