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爆炸性气体环境防爆电机选型注意事项

时间:2016-06-22 15:19 来源:三昌泵业 点击:

      、防爆电机标准:

        防爆电机般购买时必须配有防爆证、防爆电机主要用于煤矿、石油天然气、石油化工和化学工业。
        防爆电机的额定电压、额定电流、功率、转速 和普通电机标注的样,就是防爆电机多了防爆标志:Ex 、防爆型式+设备类别+(气体组别)+温度组别防爆。
        防爆合格证般都是由部门颁发,可以在网络验证证件的真实有效性,对于相关的工厂也是需要这个合格证来确保防爆电机的安全合格型。
防爆电机选择

        1、爆炸性气体危险环境场所分类:

中和IEC分区 1区 2区 备注
相当的北美分区 Class I, Zone 1
Class I, Division 1
Class I, Zone 2
Class I, Division 2
 

        1)北美分区说明:


I类2场所 Class I,  Division 2

个I类2场所是这样个场所
(1) 在那里易挥发的可燃性液体或可燃性气体被输送、加工或使用。但它们被封闭在密闭的容器或系统里。仅在出现容器或系统破裂或不正常操作时才会释放出来。或者
A Class I, Division 2  location is a location
(1) In which volatile  flammable liquids or flammable gases are handled, processed, or used, but in  which the liquids, vapors, or gases will normally be confined within closed  containers or closed systems from which they can escape only in case of  accidental rupture or breakdown of such containers or systems or in case of  abnormal operation of equipment, or
(2) 在那里气体或蒸汽的可燃浓度通常达不到,因为采用了压力机械排风。只有当排风设备出现故障或误操作,才会变成危险场所。或者 (2) In which ignitible  concentrations of gases or vapors are normally prevented by positive  mechanical ventilation, and which might become hazardous through failure or  abnormal operation of the ventilating equipment, or
(3) 与I类1场所相临,气体或蒸汽的可燃浓度偶尔会扩散过来。如果个足够大的排风机从个干净的空气源向这个场所送风,并且采用了可靠的措施避免送风失效,则该场所可列入没有危险的场所。 (3) That is adjacent to a  Class I, Division 1 location, and to which ignitible concentrations of gases  or vapors might occasionally be communicated unless such communication is  prevented by adequate positive-pressure ventilation from a source of clean  air and effective safeguards against ventilation failure are provided.


I类2区域(简称I类2区) Class I,  Zone 2

个I类2区是这样个区域
(1) 在那里可燃性气体或蒸汽的可燃浓度在正常情况下不会出现,就算出现,存在的时间也很短。或者
A Class I, Zone 2 location  is a location
(1) In which ignitible  concentrations of  flammable gases or  vapors not likely to occur in normal operation and, if they do occur, will  exist only for a short period; or
  (2) 在那里易挥发的可燃性液体、可燃性气体或可燃性蒸汽被输送、加工或使用,但它们通常被封闭在密封的容器或系统里。仅在容器或系统破裂或设备出现误操作、出现故障的情况下,才会泄漏。或者 (2) In which volatile  flammable liquids, flammable gases, or flammable vapors are handled,  processed, or used but in which the liquids, gases, or vapors normally are  confined within closed containers or closed systems from which they can  escape, only as a result of accidental rupture or breakdown of the containers  or system, or as a result of the abnormal operation of the equipment with  which the liquids or gases are handled, processed, or used; or
  (3)在那里可燃性气体或蒸汽的可燃浓度通常由采用机械通风来避免。只有当排风设备故障或误操作才会变成危险区域。或者 (3) In which ignitible concentrations of flammable gases or vapors  normally are prevented by positive mechanical ventilation but which may  become hazardous as a result of failure or abnormal operation or the  ventilation equipment; or
  (4)临近I类1区,可燃性气体或蒸汽可能扩散过来。如果采用足够的正压排风设备压入清洁空气,并且能避免排风设备的故障,则为非危险区域。 (4) That is adjacent to a  Class I, Zone 1 location, from which ignitable concentrations of flammable  gases or vapors could be communicated, unless such communication is prevented  by adequate positive-pressure ventilation from a source of clean air and  effective safeguards against ventilation failure are provided.

        2、电机选择:

中和IEC分区 1区 2区 备注
相当的北美分区 Class I, Zone 1
Class I, Division 1
Class I, Zone 2
Class I, Division 2
 
可选用的电机防爆类型 隔爆型“d”;增安型“e”(尽量避免使用);本质安全型“ia”; 隔爆型“d”;增安型“e”;本质安全型“ia”;无火花型“n”;  

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