The purpose of these specifications is to recommend minimum functional and performance characteristics relating to the speed-governing of steam turbines intended to drive electric generators that may, if desired, be included in prime-mover purchase specifications.

These specifications are limited in their scope to the following types of steam turbines, rated 500 kw and larger, and intended to drive electric generators at constant speed: (a) Straight condensing, straight non-condensing and non-automatic extraction turbines without initial and/or exhaust steam pressure control. (b) Straight condensing, straight non-condensing and non-automatic extraction turbines with initial and/or exhaust steam pressure control. ( c ) Automatic extraction and mixed-pressure turbines

The purpose of these specifications is to recommend minimum functional and performance characteristics relating to the speed-governing of steam turbines intended to drive electric generators that may, if desired, be included in prime-mover purchase specifications.