Hydroelectric power generation utilizes potential energy of water, and it is one of renewable natural resources now available. It is environment-friendly, durable for long service time and quickly responsive to the change in the demand of the electrical network. Hitachi Ltd.
manufactured its first Pelton turbine and generator unit in 1911. Since then, Hitachi developed its own technology and supplied its hydroelectric generating equipment not only in Japan and but in the countries all over the world.
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