Steam Turbines need to be manufactured in a clean and controlled environment. Usually, Steam Turbines are subjected to Mechanical Run Test (MRT) in the factory after complete assembly. MRT is carried out by rotating the Steam Turbine to rated speed using an induction Motor. This Testing simulates the actual working condition of steam turbines only in a very limited way. The Turbine is rotated at the operating speed at room temperatures in an MRT and the blades running inside the casing experience only the ambient air. This type of MRT provides very limited understanding regarding how the same Steam Turbine will work at the site under actual conditions https://turtleturbines.com/live-steam-testing-of-steam-turbines/
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