爆炸性环境 第18部分：通过封装“m”实现设备防护

[中文适用范围]： IEC 60079-18:2025 规定了用于爆炸性气体环境或爆炸性粉尘环境中，采用“m”型保护方式（以下简称“m”型设备）的电气Ex设备、Ex设备部件及Ex组件的构造、测试和标识的具体要求。对于保护等级为“mb”和“mc”的设备，本文件适用于额定电压不超过11kV（有效值AC或直流DC）的情况；对于保护等级为“ma”的设备，本文件适用于额定电压不超过1kV（有效值AC或直流DC）的情况。本文件未考虑因粉尘中释放可燃气体或有毒气体所带来的任何危险。本文件对IEC 60079-0中的一般要求进行了补充和修改。当本文件的要求与IEC 60079-0中的要求发生冲突时，应以本文件的要求为准。本文件为第五版，取代了2014年发布的第四版及2017年的修正案1。本版为技术修订版。本国际标准应与IEC 60079-0《爆炸性环境—第0部分：设备—通用要求》配合使用。使用本文件的用户应知悉，可能会发布澄清本文件解释的说明表。这些说明表可在IEC网络商店中获取，并可在每个文件页面的“历史”选项卡中找到。有关本次修订相较于前一版的重要技术变更，请参见本文件的前言部分。 [外文原描述]： IEC 60079-18:2025 gives the specific requirements for the construction, testing and marking of electrical Ex Equipment, parts of electrical Ex Equipment and Ex Components with the Type of Protection encapsulation "m" (hereinafter referred to as "m" Equipment) intended for use in explosive gas atmospheres or explosive dust atmospheres. For Levels of Protection "mb" and "mc", this document applies where the rated voltage does not exceed 11 kV ACRMS or DC. For Level of Protection "ma", this document applies where the rated voltage does not exceed 1 kV ACRMS or DC. This document does not take account of any hazard due to an emission of flammable or toxic gas from the dust. This document supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this document conflicts with a requirement of IEC 60079-0, the requirement of this document takes precedence. This fifth edition cancels and replaces the fourth edition published in 2014 and Amendment 1:2017. This edition constitutes a technical revision. This International Standard is to be used in conjunction with IEC 60079-0, Explosive atmospheres - Part 0: Equipment - General requirements. Users of this document are advised that interpretation sheets clarifying the interpretation of this document can be published. Interpretation sheets are available from the IEC webstore and can be found in the "history" tab of the page for each document. Please see the foreword to this document for the list of significant technical changes with respect to the previous edition.