Most wind turbines need a minimum wind speed of about 7 to 11 mph (3 to 5 m/s) to start generating electricity. This threshold, called the “cut-in speed,” is the point where the blades begin spinning fast enough to produce usable power.
Provides the understanding of the safe management of hazardous energies and the theoretical training in the Wind Turbine Safety Rules (WTSR) (v4 2021). Sets out the Wind Turbine Safety Rules, Guidance and support Procedures.
What is documented however [31, 96–99] is that wind turbines require primary life-cycle embodied energy amounts in the order of only 1–3 MWh kW −1 (that usually implies energy payback periods of months), with the stage of manufacturing being the most demanding.
During the meeting, CTUIL representatives explained that the IEC 61400-1 standard, which applies to wind turbines, sets the normal operating temperature range between -10°C and +40°C, with an extreme range of -20°C to +50°C.