爆炸性环境.第31部分:外壳“t”UL 60079-311范围1DV的设备粉尘点火保护。1修改第1条第一款和第二款，替换为以下内容:1DV。1.1 IEC 60079标准的本部分适用于爆炸性粉尘环境中使用的受外壳和表面温度限制保护的电气设备。它规定了电气设备和防爆部件的设计、施工和测试要求。本标准补充和修改了UL IEC 60079-0的一般要求。如果本标准的要求与UL IEC 60079-0的要求冲突，则以本标准的要求为准。本标准不适用于不需要大气氧气燃烧的炸药粉尘或自燃物质。本标准不适用于拟用于矿井地下部分的电气设备或防爆组件，以及受沼气和/或可燃性粉尘危害的矿井地面装置部分。 本标准未考虑因粉尘排放易燃或有毒气体而产生的任何风险。如果电气设备应用在可能同时或单独含有可燃性粉尘和爆炸性气体的环境中，则需要考虑额外的保护措施。如果电气设备必须满足其他环境条件，例如防止进水和耐腐蚀，则可能需要采取其他措施。所采用的措施不应对外壳的完整性产生不利影响。1DV。2添加1DV。2.11DV。2.1如果参考了其他IEC 60079标准，这些标准中的参考要求适用于任何适用的美国国家差异。

Explosive Atmospheres - Part 31: Equipment Dust Ignition Protection by Enclosure "t"UL 60079-311 Scope1DV.1 Modification of Clause 1, first and second paragraphs to replace with the following:1DV.1.1 This part of IEC 60079 standard is applicable to electrical equipment protected by enclosure and surface temperature limitation for use in explosive dust atmospheres. It specifies requirements for design, construction and testing of electrical equipment and Ex Components.This standard supplements and modifies the general requirements of UL IEC 60079-0. Where a requirement of this standard conflicts with a requirement of UL IEC 60079-0, the requirement of this standard takes precedence.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 apply to electrical equipment or Ex Components intended for use in underground parts of mines as well as those parts of surface installations of such mines endangered by firedamp and/or combustible dust.This standard does not take account of any risk due to an emission of flammable or toxic gas from the dust.Consideration of additional protective measures is required where the application of electrical equipment is in atmospheres, which can contain combustible dust as well as explosive gas, whether simultaneously or separately.Where the electrical equipment has to meet other environmental conditions, for example, protection against ingress of water and resistance to corrosion, additional measures can be necessary. The measures used should not adversely affect the integrity of the enclosure.1DV.2 Addition of 1DV.2.11DV.2.1 Where references are made to other IEC 60079 standards, the referenced requirements found in these standards apply as modified by any applicable U.S. National Differences.