Wind turbines can stop turning due to two reasons: mechanical maintenance needs and there isn't enough wind for the turbine to be turning. Meteorologists (weather scientists) measure wind speed in knots, which are almost the same as miles per hour (1 knot = 1. Wind speed is sometimes. . There are a number of reasons why a wind turbine may be stopped. The three wind speeds that affect turbine power production are cut-in, cut-out, and rated wind. . Wind turbines are engineered to convert the kinetic energy in wind into electrical energy using a rotor (comprising blades or sails), a generator, and various control systems.
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