A blade angle adjustment drive for a wind power plant having an electrical converter, an electric motor electrically coupled to the converter, and a monitoring unit which monitors the operation of the converter and identifies a malfunction in the operation of the converter. The operation of the converter may be interrupted at least temporarily based on the malfunction. An interruption prevention unit is selectively operable to prevent an interruption in the operation of the converter by the monitoring unit when the bade angle adjustment drive is in an emergency operation state.