Abstract: The invention relates to a method and a device for safely disconnecting electric drives, wherein disturbances of the electric drive which are independent from the driving and lifting speed are recognized in a delay-free manner by retaining the safety function and are used for disconnecting the electric drive. The signals of the sensors (7.1, 7.2, 8.1, 8.2) are detected in a redundant manner and are redundantly compared to preselected threshold values in evaluation devices (2.1, 2.2) such that the electric drive (12) is safely disconnected in a redundant manner without using mechanical position devices if the preselected threshold value of the electric drive (12) is exceeded.

Abstract: The invention relates to a method and a device for safely disconnecting electric drives, wherein disturbances of the electric drive which are independent from the driving and lifting speed are recognised in a delay-free manner by retaining the safety function and are used for disconnecting the electric drive. The signals of the sensors (7.1, 7.2, 8.1, 8.2) are detected in a redundant manner and are redundantly compared to preselected threshold values in evaluation devices (2.1, 2.2) such that the electric drive (12) is safely disconnected in a redundant manner without using mechanical position devices if the preselected threshold value of the electric drive (12) is exceeded.