Abstract: A device for monitoring the air gap of an electric machine and method for retrofitting. Electric machine, including a rotor, a stator with a laminated core and a device for monitoring the radial air gap of the electric machine, wherein the device includes a microwave radar system which includes a transmission and receiving unit for transmitting and receiving microwaves, an antenna and a cable connecting the transmission and receiving unit with the antenna, wherein antenna during operation of the device is arranged such that its opening terminates with one side of the radial gap that is to be monitored.

Abstract: The invention concerns a process for the orientation of the load in cranes, in which the load hung from cables is rotated by a predetermined absolute angle using rotating gear between cable and load. Under the invention, here a regulating device is provided for the rotating gear with which torsion oscillations of the load are suppressed, where, as input values, the absolute rotating angular speed and the angular position of the rotating gear are measured and fed back to the setting input.

Abstract: The invention concerns a process for the orientation of the load in cranes, in which the load hung from cables is rotated by a predetermined absolute angle using rotating gear between cable and load. Under the invention, here a regulating device is provided for the rotating gear with which torsion oscillations of the load are suppressed, where, as input values, the absolute rotating angular speed and the angular position of the rotating gear are measured and fed back to the setting input.