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What is ATV61* drive withstand operation in H2S Hydrogen Sulphide environment ?

ATV61HD55M3X…HD90M3X, ATV61HD90N4…HC63N4, ATV61H***Y drives are supplied as standard in a reinforced version.
They comply to standard IEC60721-3-3 class 3C2.
The value of H2S Hydrogen sulphide is indicated in the standard, for this class 3C2, the mean value is 0.1 mg/m3 & its maximum value is of 0.5 mg/m3, Kindly find attached a snapshot.  

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