A Pelton rotor has 20 to 40 rotor buckets depending on the size. The water leaves one or many adjustable nozzles with high pressure on the blade between the half shells. The water jet is diverted almost 180° into the hollows of the blades. In this way the energy can be almost completely released over the turbines. The advantage of this type of turbine construction method lies in the drop-height. Pelton turbines are suitable for drop-heights of 50 to 1500 m. With a drop-height of 1000 m, the water jet can reach a speed of 500 km/h. The efficiency of this turbine is between 85 % and 90 %.