This standard contains general requirements and definitions applicable to all types of 60-Hz synchronous machines, except fractional horsepower motors. Specific requirements for salient-pole synchronous generators will be found in ANSI C50.12, cylindrical-rotor synchronous generators in ANSI C50.13, combustion-gas-turbine-driven, cylindrical-rotor synchronous generators in ANSI C50.14, and hydrogen-cooled, combustion-gas-turbine- driven, cylindrical-rotor synchronous genera- tors in ANSI C50.15.