Rotor arresting device for a wind turbine and method

A rotor arresting device for a wind turbine having a rotor and a rotation assembly coupled to the rotor in a rotationally rigid manner, the rotor arresting device comprising:

• a coupling device configured to be arranged on a static assembly, wherein the static assembly is configured to be fixed relative to the rotation assembly of the wind turbine, the coupling device including:
• a first actuator,
• a second actuator, and
• a coupling element coupled to the first and the second actuator,
• a counterpart coupling element configured to be arranged on the rotation assembly,
• wherein the coupling element and the counterpart coupling element are releasably connected in an arresting position of the coupling device,
• wherein the coupling device is configured to move from a release position into the arresting position by at least one movement chosen from a first coupling movement of the first actuator and a second coupling movement of the second actuator, and
• wherein the first coupling movement has a first setting direction component and the second coupling movement has a second setting direction component, wherein the first setting direction component and the second setting direction component are directed in opposite directions.