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Moisture location category denition
Environment category denition
Pollution degree denition
Pollution Degree I
No pollution or only dry, non-conductive polllution occurs. The
pollution has no inuence.
Pollution Degree II
Normally only non-conductive pollution occurs. Occasionally, however,
a temporary conductivity caused by condensation must be expected.
Pollution Degree III
Conductive pollution occurs, or dry. non-conductive pollution occurs,
which becomes conductive due to condensation, which is expected.
Pollution Degree IV
Persistent conductive pollution occurs, for example, the pollution
caused by conductive dust, rain or snow.
Moisture Parameters
Level
3K3 4K3 4K4H
Temperature Range 0~+40℃ -33~+40℃
~20~+55℃
Moisture Parameters 5%~85% 15%~100% 4%~100%
Environment
Condition
Ambient Termperature Relative Humidity Applied to
Outdoor -20~50℃ 4%~100% PD3
Indoor Unconditioned -20~50℃ 5%~95% PD3
Indoor conditioned 0~40℃ 5%~85% PD2
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