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Woodward 8915-886
Product Introduction
The Woodward 8915-886 is a microprocessor-based digital governor controller module belonging to the well-known 505 series. It is primarily designed for speed control and protection of steam turbines, especially for single-valve steam turbines, including single extraction/admission systems or split-range actuator configurations. The controller manages turbine startup, speed regulation, and extraction/admission control, and is suitable for industries such as power generation, oil & gas, petrochemical, and process automation.
Detailed content
Technical Specifications
- Power Supply: +24 VDC, approx. 1 A (operating range 18–32 VDC)
- Outputs: 8 discrete outputs, 6 analog outputs, 2 actuator outputs
- Inputs: 16 discrete contact inputs (4 fixed, 12 programmable), 6 programmable 4–20 mA current inputs
- Display / HMI: Two-line, 24-character LCD with multi-function keypad (Operator Control Panel)
- Dimensions: Approx. 14 × 11 × 4 in (35.6 × 27.9 × 10.2 cm)
- Weight: Approx. 9.11 lbs (4.13 kg)
- Operating Temperature: –4 to +140 °F (–20 to +60 °C)
- Storage Temperature: –40 to +185 °F (–40 to +85 °C)
- Humidity: 95% RH at 20–55 °C for 48 hours without damage
- Protection Class: Meets industrial dust and water protection standards (typically NEMA 4X / IP56)
- Communication Protocol: Modbus, RS-232 / RS-422 / RS-485 serial interfaces
- Software: 505View or OpView™
Functional Features
- Microprocessor-based control with high-reliability industrial design
- Triple independent overspeed protection logic
- On-site programming via front-panel Operator Control Panel
- Critical speed avoidance, actuator travel limits, and event logging
- Real-time monitoring, self-diagnosis, and fault alarm capabilities
- Supports programming mode and running mode for flexible configuration
Application Scenarios
- Steam turbine speed and load control
- Turbo-generator frequency and load management
- Turbine-driven compressor and pump speed control
- Chemical, refinery, and other process industry turbine operations
Installation Requirements
- Rack-mounted or modular installation inside a control panel system
- Proper grounding and shielding for communication cables
- 24 VDC power supply with stable voltage within 18–32 VDC range
Usage Notes
- Ensure ambient temperature remains within –20 to +60 °C
- Avoid unauthorized modifications beyond specified electrical and mechanical limits
- Regularly verify communication integrity with DCS/PLC systems
