Consider the following statements for wind turbines
1. Cut-in velocity is the velocity at which the blades may rotate but does not produce any power.
2. Rated velocity is the velocity at which the turbine starts delivering power to the shaft.
3. Solidity ratio is used to determine the quality of blade material to interrupt the airflow.
Which of the following statements are correct?
1
1, 2 and 3
2
only 1
3
only 2
4
only 3