FIELD: mechanical engineering; ground power plants. SUBSTANCE: proposed gas turbine plant has volute, inlet housing with oil and air spaces, compressor and rotor speed pickup installed on inlet housing under inner case of volute. Pickup inductor is arranged on outer surface of splined flange of flexible coupling installed on rotor shaft shank. Invention is aimed at increasing reliability of plant by bringing the pickup out of limits of flow and oil spaces of plant, at improving accuracy of measurement of rotor speed and compressor rotor critical speed margins by bringing to minimum intermediate elements between pickup and shank or rotor shaft and decreasing distance between flexible coupling and rotor bearing. EFFECT: enhanced reliability of operation. 4 dwg
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