WOODWARD

Main Functions

This is a microprocessor‑based digital turbine governor for industrial steam turbines. It executes turbine startup, speed regulation, load control, process cascade control, safety protection, local operation and system communication. It drives electro‑hydraulic actuators to regulate steam inlet valves.

Woodward 505 Digital Governor Controller (Part Number:9907‑164) for Single / Split‑Range Actuator Steam Turbines

1. Precise Speed & Load Governing Control Supports isochronous (constant speed) and droop speed regulation modes. Receives speed signal from magnetic or hall‑effect speed probes. It governs turbine rotational speed during startup, acceleration, normal running and load variation. For generator‑drive units, it performs load control and load‑sharing for parallel‑operation generators. Supports three configurable critical‑speed avoidance bands to skip dangerous rotating‑speed ranges automaticallywoodwardco….
2. Cascade & Auxiliary Process Control Built‑in multi‑PID control loops. Cascade control allows the turbine to regulate upstream or downstream steam header pressure, back‑pressure or other process parameters, with bumpless mode transfer between speed control and process‑parameter control. Auxiliary PID loops handle additional auxiliary control demands. It supports single‑actuator or split‑range dual‑actuator valve output modesWoodward.
3. Turbine Startup, Sequence and Valve‑Ramp Logic Provides automatic startup sequence, programmable valve opening ramps for warm‑up. It prevents thermal stress damage to turbine rotors and casings during cold start. Local keypad or remote dry‑contact signals can execute start, stop and trip commandsWoodward.More products: www.plcva.com
4. Integrated Protection & Fault Diagnostics Includes overspeed anticipation logic, configurable over‑speed / under‑speed shutdown thresholds. Emergency shutdown function via hardware trip circuit. On‑board self‑diagnosis monitors power supply, I/O status, sensor faults and internal hardware anomalies. Stores trip history, alarm logs and event records for post‑failure analysis. Relay outputs transmit alarm and trip status to external systemswoodwardco….
5. Local HMI and Industrial Communication Equipped with front‑panel 30‑key keypad and 2‑line back‑lit LCD display. Operators can view real‑time parameters, modify setpoints and read fault codes locally. Supports RS‑232 / RS‑485 Modbus RTU communication interface. Interconnects with DCS, PLC or SCADA host systems for remote monitoring, remote setpoint adjustment and data acquisition. Supports configuration via Woodward service software tools.
6. Input / Output Resources Speed probe inputs, multi‑channel 4‑20 mA analog I/O, configurable digital discrete inputs, relay digital outputs. Provides control signals to electro‑hydraulic actuators for steam governing valves.

Woodward 505 Digital Governor Controller (Part Number:9907‑164) for Single / Split‑Range Actuator Steam Turbines

3. Applications

1. Industrial Steam Turbine for Power Generation Primary governor for back‑pressure or condensing steam‑turbine generator sets in co‑generation plants, industrial self‑power plants. Realizes speed governing, load control and parallel grid‑connected operation for generatorswoodwardco….
2. Mechanical‑drive Turbine Applications Controls steam turbines driving centrifugal compressors, large process pumps, blowers and fans in refineries, petrochemical and chemical plants. Stabilizes rotating‑speed for mechanical‑drive equipment under changing process conditionswoodwardco….
3. Process‑plant Steam Header Pressure Control Used for turbine‑based pressure regulation of steam networks in chemical, pulp‑and‑paper and sugar factories. Operates under cascade mode to maintain stable steam‑header pressure for whole‑site process utility systemsWoodward.
4. Legacy Turbine‑system Retrofit & Spare‑part Replacement Well‑known spare controller for worldwide existing 505 installation bases. Replace aged original governor units without modifying turbine actuators, field sensors and field piping, minimizing plant outage duration and preserving existing investment.
5. Stand‑alone or DCS‑coordinated Turbine Control Cabinets Can run as standalone turbine control unit, or work cooperatively with plant DCS system. Widely deployed in turbine control cabinets for medium‑size industrial steam‑turbine assets.

Woodward 505 Digital Governor Controller (Part Number:9907‑164) for Single / Split‑Range Actuator Steam Turbines

Understand the lowest price, please contact via email: plcvarious@foxmail.com

More products: www.plcva.com

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