Description: Highest relative humidity to which a device can be exposed without permanent restriction of the operating behavior; Name: relative humidity (maximum)
Description: highest relative humidity to which a device may be subject without permanent impairment of operating characteristics; Name: max. air humidity
Description: Allocation of explosion-protected electrical operating media according to their maximum surface temperature for use in explosion-capable atmosphere in accordance with (IEC 50(426):1990; Name: Explosion protection temperature class of the electric motor