Woodward Electronic Controls

    Electronic Controls for Steam Turbines


    505DE Multipurpose Steam Turbine Control

    Single Valve, Single Extraction / Admission or Dual Extraction / Admission Steam Turbines

    Woodward’s 505DE configurable control operates industrial steam turbines of all sizes in both generator and compressor applications.

    This 505DE allows configuration for use on:

    • single inlet turbines
    • single extraction turbines
    • double extraction turbines


    This makes it ideal for plants wanting to standardize on one product for all their steam turbines.

    The 505DE control's unique PID structure makes it ideal for applications where it is required to control several steam plant parameters at once, like turbine speed, load, and inlet, extraction, or exhaust header pressures.

    Available in simplex or dual-redundant models.

    Learn more from the 505DE product specification


    The 505DE’s standard control capabilities are:

    • Start/Stop Sequencing with idle speed hold points
    • Speed PID Control
    • Cascade Control (Pressures, loads, etc.)
    • Aux-1 Limiter or Controller PID (pressures, loads, etc)
    • Critical Speed Avoidance
    • Overspeed Protection
    • Alarm and Shutdown Protection Logic
    • Serial and Ethernet Modbus® * Communications
    • Redundant CPU, Power Supplies & I/O with auto selection
    • Integrating Valve Controller (with 2-Chan Act module)
    • Single Extraction/Admission PID Control
    • Double Extraction/Admission PID Control

    The 505DE’s configurable control capabilities are:

    • Turbine Speed Control or Limiting
    • Inlet Pressure Control or Limiting
    • Exhaust Pressure Control or Limiting
    • Process Control or Limiting
    • Bootstrap Based Starts
    • Generator MW Control and Limiting
    • Utility Tie-Line MW Control and Limiting
    • Remote 4–20 mA or Modbus Setpoints (All PIDs)
    • Overspeed Testing
    • Isochronous Load Sharing (Via EGCP-3 controller)