IEC 60079的本标准部分包含施工、测试和试验的具体要求 电气设备、电气设备零件和防爆组件的标记 填充“q”的保护粉末，用于爆炸性气体环境。注1:受粉末填充“q”保护的电气设备和防爆部件可能包含电子电路， 变压器、保护熔断器、继电器、本质安全电气设备、相关电气设备、开关、， 注2:填充“q”的防护粉类型提供设备防护等级（EPL）Gb。 欲了解更多信息， 见附件A。

This standard part of IEC 60079 contains specific requirements for the construction, testing and marking of electrical equipment, parts of electrical equipment and Ex components in the type of protection powder filling "q", intended for use in explosive gas atmospheres.NOTE 1 Electrical equipment and Ex components protected by powder filling "q" may contain electronic circuits, transformers, protection fuses, relays, intrinsically safe electrical apparatus, associated electrical apparatus, switches, etc.NOTE 2 Type of protection powder filling "q" provides equipment protection level (EPL) Gb. For further information, see Annex A.