Nacelle: The rotor attaches to the nacelle, which sits atop the tower and includes the gear box, low- and high-speed shafts and generator.

 Rotor: The blades and the hub together are called the rotor.

 Hub: The hub of the rotor is attached to the low speed shaft of the wind turbine.

 Low-speed shaft: The rotor turns the low-speed shaft at about 20 to 30 rotations per minute.

 Gearbox: The gearbox transforms the low revolutions of the rotor into high revolutions for the generator.

 High-speed shaft: Drives the generator.

 Generator: The generator transforms the rotational energy into electrical power which is usually between 600 and 2,000 kilowatts (kW).

 Transformer: The transformer converts the electrical power from low voltage (690 V) to a higher voltage suitable for grid connection.