Wind turbine components : 1- Foundation , 2- Connection to the electric grid , 3- Tower , 4-Access ladder, 5- Wind orientation control (Yaw control) , 6- Nacelle , 7- Generator , 8- Anemometer , 9- Electric or Mechanical Brake, 10- Gearbox , 11- Rotor blade , 12- Blade pitch control , 13- Rotor hub.