Description: Rotor resonant frequency calculated assuming that the rotor is supported only in the bearings and that the bearings have infinite stiffness; Name: crit speed (dry)
Description: Rotor resonant frequency calculated considering the additional support and damping produced by the action of the pumped fluid within rotor  ; Name: Wet critical speed
Description: Value indicated by the manufacturer of the device which arises from measurements which have been found out under fixed conditions and rules for the tension which can be laid out to electrical operating supplies under consideration of the use conditions and on which the different product-specific testings refer; Name: Rated input voltage