The Pelton Turbine or pelton wheel is a turbine that is often used in hydroelectric plants. The Pelton turbine design is quite simple. A large disc is mounted on a rotating shaft called a rotor. Mounted on the disc is a cup-shaped blade, called a bucket, evenly spaced around the entire wheel. Typically, the blades are arranged in pairs around the rim. The nozzle is then placed on the wheel and used to introduce water into the turbine. The jet of water ejected from these nozzles is tangent to the wheels of the turbine. This causes the turbine to rotate due to the impact of the water jet on the bucket.
Unlike other types of turbines that are reaction turbines, Pelton turbines are known as pulse turbines. This simply means that the water does not move due to the reaction force, but rather creates some impulse on the turbine to move it.