Abstract: A drive installation includes a drive source (1), an electrically driven auxiliary installation (7), a generator (6) and a transmission (25) for driving the generator (6) by the drive source (1), which transmission (25) includes a continuously variable transmission (3) with an input shaft (4) that is connected to the drive source (1) and an output shaft (5) that is connected to the generator (6), as well as control elements (8) for adjusting the transmission ratio of the continuously variable transmission (3). At least one sensor is provided for the detection of a characteristic of the drive source (1), the continuously variable transmission (3), the generator (6) and/or the auxiliary installation (7). The sensor is connected to the control elements (8) such that the continuously variable transmission (3) can be controlled on the basis of the characteristic detected by the sensor.