Protection for wind power station

[0023] Referring now in greater detail to the drawings, FIG. 1 illustrates a wind power station 1 connected to a power grid 2. The wind power station 1 includes a wind rotor 3 having at least one, typically 2 or 3 blades 4, each of which being connected to a rotatable shaft 5. Generally, the rotatable shaft 5 is oriented horizontally at a distance to the ground which is in the order of the diameter of the wind rotor 3. Thus, the tips 6 of the blades 4 keep a distance to the ground of about half of the diameter of the wind rotor 3. The rotatable shaft 5 of the wind rotor 3 is mechanically coupled to an input shaft 7 of a transmission 8. The transmission 8 is a fixed ratio transmission increasing the rotational speed of its input shaft7 into a higher output speed of its output shaft 9. In this way the rotational speed of the wind rotor 3 is raised into an operation range of a generator 10, a rotor 11 of which is mechanically coupled to the output shaft 9 of the transmission for rotation