With a neat diagram explain medium head hydro-electric power plants.
Diagram of medium head hydro-electric power plants:
Explanation:- If head of water is between 30 and 100 m, the plant is called a medium-head plant. Potential energy of stored water is medium. Larger volume of water is required Catchment area of medium capacity is required as water requirement is more. The power plant is situated at medium distance from dam. There is no surge tank forebay acts as a surge tank. Penstocks are of medium length and comparatively medium in diameter Francis turbines are normally used. Alternator required in these plants is of low speed and large in diameter.