Description With a performance of 1500 kW the S77 wind turbine belongs middle market segment. The rotor diameter of this plant is 77 m. This well known manufacturer Nordex disposes over an wide product range of 29 different models. The power production starts at a wind speed of 3.5 m/s. At 25 m/s the automatic turn off the plant takes place. The optimal performance can be reached at a comparatively high wind speed of 12.5 m/s.