Description
Woodward 8440-1860D
Technical Specifications
- Control Type: Digital speed/load governing with isochronous and droop modes.
- Inputs: Magnetic pickup (MPU) speed inputs, analog feedback, and discrete status signals.
- Outputs: Analog actuator drive and discrete relay outputs for alarms and trips.
- Communication: Serial communication interface for integration with monitoring systems.
Functional Features
- Precision Governing: Tight speed regulation with adjustable droop and isochronous load sharing.
- Programmable Logic: Built-in logic solver for auxiliary control functions and interlocks.
- Self-Diagnostics: Continuous monitoring of internal health and field wiring integrity.
- Data Retention: Non-volatile storage for configuration, calibration, and event data.
Application Scenarios
Commonly used in diesel generator sets, gas engine generators, steam turbines, and mechanical drives requiring reliable speed control and load management.
Performance Parameters
- Speed Accuracy: Steady-state speed regulation typically within ±0.25% or better.
- Load Sharing: Accurate kW load division in parallel generator applications.
- Response Time: Fast transient response to load changes and setpoint adjustments.
Material Composition
Ruggedized industrial construction with conformal-coated electronics and gold-plated connector contacts for long-term reliability in demanding environments.
Structural Characteristics
- Compact Form Factor: Space-efficient design for high-density control panels.
- Local Interface: Keypad and display for local parameter adjustment and monitoring.
- Status Indicators: Clear LED indicators for power, run, fault, and output status.
Working Principle
The module measures actual engine or turbine speed via MPU signals and compares it to the desired setpoint. Based on the error, it calculates the required fuel or steam valve position and outputs a proportional signal to the actuator. It also monitors system conditions and initiates protective actions if unsafe operating parameters are detected.
Installation Requirements
- Mount in a clean, dry location with adequate ventilation.
- Route MPU and signal cables properly to minimize electrical noise.
- Ensure proper grounding and secure electrical connections.
Usage Precautions
- Always perform a complete calibration and functional test after installation or major parameter changes.
- Never operate the engine or turbine without verified overspeed protection.
- Keep configuration records updated and backed up.
