IEC60730.1标准中爬电距离 材料类别和污染等级
请问IEC60730.1标准中爬电距离测量，其材料类别和污染等级怎么确定呢？有什么标准详细分类了吗？谢谢。 污染等级参考这个:https://www.myomron.com/index.php?action=kb&article=513
Pollution Degree 1 : No pollution or only dry non-conductive pollution. It has no effect. Clean room environments, Inside sealed components
Pollution Degree 2: Normally only non-conductive pollution. Temporary Condensation possible. Offices, laboratories, test stations
Pollution Degree 3: Conductive and non-conductive pollution present. Condensation frequent. Industrial & farming areas (under cover), unheated rooms, Boiler rooms
Pollution Degree 4: Pollution generates persistent conductivity caused by wet dust, rain or snow. Outdoor use, remote stations
材料类别 (Material group) 在 6.13:
6.13.1 – material of material group IIIb with a PTI of 100 and up to but excluding 175;
6.13.2 – material of material group IIIa with a PTI of 175 and up to but excluding 400;
6.13.3 – material of material group II with a PTI of 400 and up to but excluding 600;
6.13.4 – material of material group I with a PTI of 600 and over.
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