This paper describes the design and construction of a new 3000-hp single-shaft gas turbine which has been designed for sufficient speed flexibility to make it ideal for mechanical drive applications. Over-all performance and efficiencies of the gas turbine are presented together with a description of the control system and its application to variable-speed drives. A simplified electrohydraulic control system is described which retains necessary protective features and minimizes the accessory equipment. Particular emphasis has been placed on refinery applications where reliability is paramount.

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