The Woodward 8200-1302 is a specialized digital speed governor and process controller manufactured by Woodward. Designed for industrial power generation and mechanical drive applications, it provides precise speed, load, and process control for steam turbines, gas turbines, or industrial engines.
Positioned in critical plant utility and process loops, the 8200-1302 regulates actuator positioning to maintain turbine speed stability, manage steam extraction/outlet pressures, and execute automated startup and shutdown sequences.
Key Specifications & Identification
| Attribute | Details |
| Manufacturer | Woodward |
| Part Number | 8200-1302 |
| Product Line | Digital Speed & Process Control / Governor Series |
| Application Type | Steam Turbine Governing, Engine Speed Control, Process Outlet Control |
| Speed Sensing Inputs | Magnetic Pickup Units (MPUs) / Proximity Switches |
| Analog Input/Output | 4–20 mA / 0–10 VDC configurable process inputs and actuator outputs |
| Control Modes | Isochronous, Droop Speed Control, Process Limiters, Cascade Control |
| Mounting / Enclosure | Flush-mount front panel or NEMA rated enclosure chassis |
Primary System Functions
- Turbine Speed & Load Governing: Executes real-time closed-loop PID control to maintain strict speed regulation under fluctuating electrical grid or mechanical loads using droop or isochronous modes.
- Process Outlet & Pressure Control: Accepts feedback signals (such as 4–20 mA process pressure or flow transmitters) to automatically regulate steam header or process outlet conditions via secondary cascade loops.
- Actuator Driver Outputs: Translates internal control logic into high-accuracy current signals (e.g., 4–20 mA or direct coil drive) to position hydraulic or electronic governor actuators (such as Woodward EG-3P, TM-25, or CPC actuators).
- Overspeed & Critical Fault Interlocks: Works alongside mechanical/electronic overspeed trip systems to immediately dump actuator output current and close steam/fuel inlet valves during overspeed or system trip events.
Servicing & Installation Guidelines
- Turbine Bypass Safety Warning: Prior to installing, calibrating, or replacing the 8200-1302 controller, place the turbine trip valve in a safe, bypassed, or manually tripped state to prevent unintended fuel/steam admission and runaway conditions.
- Speed Sensor (MPU) Signal Integrity: Ensure Magnetic Pickup (MPU) wiring uses twisted-shielded cable grounded at only one end (controller side) to prevent high-frequency electrical noise from corrupting speed calculations.
- Actuator Zero & Span Calibration: After replacing or upgrading a unit, perform a complete zero-and-span stroke calibration of the connected actuator valve to ensure physical valve seating matches 0% and 100% control demands.
- Configuration Backup: Save parameter settings, PID gains, speed setpoints, and trip limits using Woodward configuration software or the keypad interface before decommissioning a operational control unit.
