A WT is usually programmed only to start operating above a particular wind speed (the cut-in wind speed) and to stop operating when the wind speed exceeds another particular wind speed (the cut-outwind speed). There is very little energy available below the cut-in wind speed, making operation of the WT unviable or impossible. Above the cut-out wind speed (typically 25 m/s) the loads on the WT could cause damage if it did not shut down. Though such high-speed winds are clearly very energetic, they are experienced so rarely at most locations that very little energy is wasted by cutting out at these speeds.