Normally, Steam Turbine speed is reduced to 1500 rpm to generate power by Alternator by using a Gear Box in between if the frequency is 50 Hz and 1800 rom if it is 60 Hz. For speed reduction purposes a gearbox system is followed by a lubrication system which demands maintenance as well. https://turtleturbines.com/steam-turbines-with-induction-generator/
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