Product Details：

Woodward 5405-819 is a microprocessor-based 505E digital turbine controller designed for single extraction or admission steam turbine units, which is the upgraded model of 5405-818 single-valve version. It can realize independent closed-loop regulation of turbine speed, generator load and extraction/admission header pressure simultaneously, and adopts decoupling ratio control algorithm to reduce the mutual interference between speed loop and pressure loop, meeting the production requirements of power generation and process steam supply at the same time. This controller collects pulse speed signals from magnetic pickups, 4-20mA analog pressure, temperature and flow signals, as well as discrete trip, interlock and equipment auxiliary contact signals. It outputs two independent actuator drive signals to control the main steam valve and extraction/admission valve separately, automatically adjusting valve opening according to setpoint deviation and turbine characteristic curve. The front panel is equipped with a two-line 24-character LCD display and membrane keypad. Operators can configure startup ramp rate, idle speed, rated speed, extraction pressure setpoints, alarm limits, view first-out fault records and perform local start-stop and reset operations directly on site. It has rich configurable I/O resources including multiple analog inputs, analog outputs, discrete inputs and discrete outputs, which can be connected with emergency trip systems, lubricating oil pressure switches, vibration transmitters and safety interlock devices. It supports RS232 and RS422 serial communication based on Modbus protocol, realizing two-way data exchange with DCS and SCADA systems for remote monitoring, parameter tuning and remote control commands. It integrates comprehensive overspeed protection logic and multi-channel hardware self-diagnosis function. It can detect speed signal loss, actuator feedback deviation, power supply abnormality and internal hardware failure, trigger alarm and safe trip action according to preset protection sequence to avoid 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 petrochemical, chemical, paper making and cogeneration plants 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 steam turbine units with both power generation and process steam supply demands.

Key specifications：Woodward 5405-819 505E extraction turbine controller,24VDC power supply,dual independent actuator outputs,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.