Wind is growing in importance as a source of electric power around the world.

Utility-scale wind farms use large wind turbines, with typical capacities of 1.5–3.0 MW each. Each unit has a nacelle mounted on a 60- to 120-metre tower. Three 35-metre or larger blades are mounted on a shaft that rotates in each nacelle. Shaft power is transferred to a generator also located in the nacelle, and the resulting electricity is fed through a collector system to a transformer station connected to the power grid.

The Jardin d’Éole wind farm uses 85 General Electric 1.5 MW turbines mounted on 80-metre towers. Mont Louis has 67 GE 1.5 MW turbines on a mix of 65m and 80m towers.

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See a wind turbine schematic