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The Pelton turbine is a type of impulse turbine which consists of a bowl-shaped blade as the initial recipient of the water jet from the nozzle by utilizing a high water fall (head) motion even though the water discharge is small. This research will discuss the effect of the number of blades on the rotation produced by the Pelton turbine so that the voltage, current, power and efficiency produced by the generator in the PLTMH prototype can be determined. The aim of this research is to determine the efficiency of the turbine (runner) with the number of blades varying the output power. The research method was carried out experimentally by designing, manufacturing and testing Pelton turbine prototypes. The turbine that was made and tested has specifications for runner diameter 150 mm, blade length 31.1 mm, blade width 14.6 mm, blade depth 6.45 mm and number of nozzles 1 piece. From the research results it is known that the number of blades and nozzle diameter influence the turbine power. This research uses experimental methods. This research uses a Pelton turbine with varying numbers of blades, namely 4 blades, 6 blades and 8 blades. Overall, the analysis of Pelton turbine blades consisting of 32 blades reaching a maximum rotation of 480 Rpm includes aspects of design, material strength and performance that can be optimized to increase the efficiency of hydroelectric power generation systems. Further research is needed to explore design and material variations that may affect overall turbine performance.
Key words: Torque, hydroelectric power plant, Pelton turbine
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