Abstract: Apparatus and a method for protecting a steam turbine from damage due to moisture are disclosed. The temperature and pressure of the incoming steam are monitored to determine if sufficient superheat energy is available to assure that the steam will flow through the turbine in the gaseous phase. The same inputs may be utilized to determine under and over pressure steam conditions. Once a fault condition is detected, operation of the turbine will be automatically interrupted.

Abstract: A remote operated turning gear engager for rotating a turbomachine rotor is disclosed. Pressurized oil is selectively supplied to displace a piston to engage the turning gear with the rotor. Electrical sensing means are utilized to verify that the turning gear is in the appropriate position. Additional control means are provided for discontinuing turning gear operation should insufficient oil be supplied to the bearings. Other circuit means prevent operation of the turning gear should the rotor be rotating and allow for a bypass of this safety feature for positioning the rotor for service requirements.