Description
Woodward 9905-657
Technical Specifications
- Control Functions: Speed, load, extraction pressure, and synchronization.
- I/O Capacity: Extensive discrete and analog I/O for turbine management.
- Display: Integrated LCD operator interface.
- Communication: Modbus and serial interfaces for DCS integration.
Functional Features
- Multi-Variable Control: Manages inlet valves, extraction valves, and bypass valves.
- Start-Up Sequencing: Programmable warm-up, roll, and acceleration sequences.
- Protection: Overspeed, low lube oil, and vibration monitoring.
- Data Logging: Historical trend and event recording.
Application Scenarios
Widely deployed in steam turbines, gas turbines, turbo-expanders, and centrifugal compressors.
Performance Parameters
- Speed Regulation: Isochronous or droop with high accuracy.
- Reliability: Proven field reliability in critical applications.
Material Composition
Ruggedized industrial electronics in a protective enclosure.
Structural Characteristics
- Interface: Front keypad and LCD display.
- Connectors: Rear multi-pin connectors for field wiring.
Working Principle
The 505 continuously monitors turbine parameters and executes control algorithms to maintain setpoints. It outputs signals to electro-hydraulic converters to position valves, while continuously checking safety limits.
Installation Requirements
- Follow the 505 installation manual for wiring and grounding.
- Ensure proper MPU gap and signal strength.
- Provide clean, regulated power.
Usage Precautions
- Always verify overspeed protection before operation.
- Keep firmware and configuration backups.
- Perform regular functional testing of all I/O.
