Product Details：

Woodward 5415-852 is a microprocessor-based 505E digital turbine controller designed for double extraction steam turbine units. It supports three independent closed control loops, including turbine shaft speed control, generator load control and two extraction header pressure control, which can supply two different pressure steam sources for production process simultaneously while maintaining stable power output. This controller collects speed pulse signals from magnetic pickups, analog signals of extraction pressure, temperature and flow, as well as discrete trip, interlock and equipment auxiliary contact signals from field switches. It outputs three independent actuator drive signals to control the main steam valve, the first extraction valve and the second extraction valve respectively. It adopts decoupling control algorithm to reduce the mutual interference between multiple control loops and realize stable steam distribution balance of the whole turbine system. The front panel is equipped with a two-line 24-character LCD display and membrane function keypad. Operators can configure startup acceleration ramp, idle speed, rated speed, dual 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 multi-channel 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 damage. It adopts standard panel mounting structure, suitable for installation in turbine local control cabinet and central control room. It is widely used in large chemical plants, paper mills, cogeneration and refining projects equipped with double extraction steam turbines, used for new unit construction, old mechanical governor renovation and spare parts replacement. It is a professional multi-variable control solution for steam turbine units with dual process steam extraction requirements.

Key specifications：Woodward 5415-852 double extraction turbine controller,24VDC power supply,three independent actuator outputs,dual extraction pressure closed-loop control,Modbus RS232/RS422,local LCD keypad,panel mount. Operating temperature range: -20°C to +60°C. It supports speed loop calibration, dual 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 multi-variable closed-loop control system for double extraction steam turbine. The HMI panel helps operators monitor running variables and adjust control parameters conveniently.