Water pump (NS-50) was operated as a turbine for the Pico Hydro Power Plant was an idea in finding alternative energy that is simple and easy to assemble. In this study, the water pump (NS-50) was operated as a turbine, so that the working principle was reversed, where water from a certain height will move the pump, so that the pump impeller rotates and continues to rotate the generator and will produce electrical energy. In this study, the water pump (NS-50) is operated as a turbine, the working principle of the pump is reversed, water from a certain height will move the pump impeller, so that the pump impeller rotates and the pump shaft will rotate the generator and produce electrical energy. This study emphasizes the pump which was operated as a turbine (PAT) by utilizing a height difference of 14.51 m at a flat distance of 46.21 m with a pipe installation with a slope of 17.43o . The variable used is the discharge calculated from the water level height (H) at different V-notch weirs, namely 15 cm, 12 cm and 11 cm with the impeller used having an inlet and outlet angle of 30/75. The pump was connected to a generator to generate electricity. From the research results, the best efficiency that can be achieved was 23.33%, the rotation was 1500 rpm and the power generated was 283.5 watts.

Keywords : Pump as a Turbine, Pico Hydro, NS-50, Rapid Pipe Slope.