关于污染等级的定义
污染等级是什么意思呀?是器件对空气的污染,还是空气对器件的污染?可以查看IEC60335-1 Annex M Pollution degree 本帖最后由 H-RH 于 2012-3-22 22:28 编辑
Pollution Degree 1: No pollution or only dry, nonconductive pollution occurs. The pollution has no effect.
Pollution Degree 2: Normally only nonconductive pollution occurs. Temporary conductivity caused by condensation is to be expected.
Pollution Degree 3: Conductive pollution or dry nonconductive pollution that becomes conductive due to condensation occurs. To be found in industrial environment or construction sites (harsh environments).
Pollution Degree 4: The pollution generates persistent conductivity caused by conductive dust, rain, or snow.
污染等级1:无污染或仅有干燥的非导电性污染,此污染对设备没有影响。
污染等级2:一般情况下只有非导电性污染,但是也应预料到由于凝露偶尔造成的暂时的导电性(如办公设备中的家用电器、布线材料、灯、网络部分)。
污染等级3:存在导电性污染,或者由于凝露使干燥的非导电性污染变成导电性的污染。(如:加工设备中的电气设备、工具设备中的低压开关)。
污染等级4:造成持久性的导电及电气机车、机动车、无轨电车和车厢下的设备,机车内暴露在外的设备)。
我觉得是指根据产品结构和工作环境而判定的对产品的电气强度和电器安全的影响大小 H-RH 发表于 2012-3-22 22:25 static/image/common/back.gif
Pollution Degree 1: No pollution or only dry, nonconductive pollution occurs. The pollution has no e ...
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