有可燃性粉尘场合用电气设备.第18部分:封装'mD'型防护设备

[中文适用范围]： 适用于受封装保护类型“mD”和表面温度限制保护的电气设备，用于可能存在大量可导致火灾或爆炸危险的可燃粉尘的区域。指定要求 [外文原描述]： Applicable to electrical apparatus protected by encapsulation type of protection "mD" and surface temperature limitation for use in areas where combustible dust may be present in quantities which could lead to a fire or explosion hazard. Specifies requirements for design, construction and testing of electrical apparatus, parts of electrical apparatus and Ex components where the rated voltage does not exceed 10 kV. The application of electrical apparatus in atmospheres which may contain explosive gas as well as combustible dust, whether simultaneously or separately, requires additional protective measures.