Product Details：

Woodward 5415-851 is a microprocessor-based 505E digital turbine controller, designed for single extraction or admission steam turbine units. It can realize independent closed-loop regulation of turbine shaft speed, generator load and extraction header pressure simultaneously, and adopts decoupling control algorithm to reduce the coupling interference between speed loop and pressure loop, satisfying the dual production demands of power generation and process steam supply. This controller collects pulse speed signals from magnetic pickups, standard 4-20mA analog signals of extraction pressure, temperature and flow, as well as discrete trip, interlock and auxiliary contact status signals from field switches. It outputs two independent actuator drive signals to control the main steam valve and extraction valve respectively, dynamically adjusting valve opening according to the deviation between actual process value and setpoint to balance the unit rotating speed, power load and extraction steam header pressure. The front panel integrates a two-line 24-character LCD display and membrane function keypad. Operators can configure startup acceleration ramp, idle speed, rated speed, extraction pressure setpoints and alarm thresholds, view first-out fault records, and perform local start, stop and reset operations directly on site. It is equipped with abundant configurable I/O resources, including multiple analog inputs, analog outputs, discrete inputs and discrete outputs, which can connect emergency trip systems, lubricating oil pressure switches, vibration transmitters and safety interlock relays. It supports RS232 and RS422 serial communication based on Modbus protocol, realizing bidirectional data exchange with DCS and SCADA systems for remote monitoring, parameter modification and remote control command reception. It integrates independent overspeed protection logic and comprehensive multi-channel hardware self-diagnosis function. It can detect speed signal loss, actuator feedback deviation, module power failure and internal hardware abnormality, trigger alarm and safe trip action according to preset protection sequence, avoiding turbine overspeed and overpressure equipment damage. It adopts standard panel mounting structure, suitable for installation in turbine local control cabinet and central control room. It is widely used in petrochemical, chemical, paper making and cogeneration plants equipped with single extraction or admission steam turbines, used for new unit construction, old mechanical governor renovation and spare parts replacement. It is a mature multi-variable control solution for extraction steam turbine units.

Key specifications：Woodward 5415-851 505E extraction turbine controller,24VDC power supply,dual independent actuator outputs,single extraction/admission pressure control,Modbus RS232/RS422,local LCD keypad,panel mount. Operating temperature range: -20°C to +60°C. It supports speed loop calibration, extraction pressure PID tuning, actuator stroke test and communication verification during maintenance.

This 505E controller cooperates with magnetic pickups, hydraulic actuators and field transmitters to build stable speed-load and extraction pressure closed-loop control system. The HMI panel helps operators monitor running variables and adjust control parameters conveniently.