PROTECTIVE SYSTEM FOR AUTOMATIC ACTUATION OF STEAM TURBINE DRAIN VALVES

摘要

System for automatically opening drain valves to drain condensate from a steam turbine when the load on the turbine falls below a predetermined limit beyond which condensate within the turbine casing is likely to occur. Preferably, load conditions are sensed by a pressure switch actuable in response to a low pressure-low load condition within the turbine casing. This switch then closes electrical circuitry for opening the drain valves when the pressure falls below the aforesaid predetermined limit.