Description
The Woodward 9907-018 is a high-precision 2301A series electronic control designed for load sharing and speed control of generators driven by diesel or gas engines, or steam and gas turbines. This specific model is a forward-acting control used in installations where the actuator requires an increase in current to increase fuel or steam flow. It is housed in a rugged, sheet-metal chassis and is built for mounting in a control cabinet. The 9907-018 provides proportional and integral control to maintain precise engine speed and ensure balanced load distribution between multiple units operating in parallel.
Technical Specifications and Datasheet
Model Number: 9907-018 Product Series: 2301A Speed & Load Control Action: Forward Acting Supply Voltage: 20–40V DC (Low Voltage Version) Power Consumption: 15W Maximum Magnetic Pickup Input: 1.0 to 30V peak-to-peak Speed Range: 500 Hz to 25,000 Hz Load Sharing: 0 to 6V DC (represents 0-100% load) Actuator Output: 0–200 mA DC Dimensions: 230 mm x 205 mm x 45 mm Weight: 1.5 kg Country of Origin: USA Operating Temperature: -40 to +85 °C
Application Fields
The 9907-018 is a standard in industrial power management, including:
- Marine Propulsion: Managing engine speed and synchronization for large vessel generators.
- Standby Power: Ensuring seamless load sharing in hospital and data center backup systems.
- Industrial Turbines: Controlling steam and gas turbines for mechanical drive or power generation.
- Remote Power Grids: Coordinating multiple diesel generator sets in isolated mining or oil sites.
Product Instructions and Usage
Installation of the 9907-018 should be performed on a flat surface inside a protective enclosure to prevent exposure to moisture and excessive vibration. The unit requires a magnetic speed sensor (MPU) for frequency feedback and a 24V DC power source. For load sharing, the “L” terminals must be connected in parallel between all participating units. Tuning is achieved via the onboard potentiometers: “Rated Speed,” “Gain,” “Reset,” and “Actuator Compensation.” It is critical to perform the initial setup with the engine stopped to calibrate the speed range, followed by dynamic tuning under load to ensure stability.
WOODWARD 9907-018
Common Questions and Answers (Q&A)
What does “Forward Acting” mean for this control? It means that as the load or speed demand increases, the output current sent to the actuator increases. This is typical for actuators that move to the “maximum fuel” position when receiving full current.
Can this module be used with 115V AC power? No, the 9907-018 is the low-voltage DC model (20-40V DC). For AC applications, a different 2301A model number or an external power converter is required.
How do I troubleshoot a “Speed Hunting” issue? Hunting is often caused by incorrect “Gain” or “Reset” settings. Slowly adjust the Gain potentiometer counter-clockwise until the engine stabilizes, then fine-tune the Reset for responsiveness.
Is it compatible with non-Woodward actuators? The 9907-018 is designed to work with most actuators that accept a 0-200 mA signal, though it is optimized for Woodward’s own line of precision actuators.
What happens if the Magnetic Pickup (MPU) signal is lost? The control includes a “Loss of Speed Signal” protection circuit that will automatically reduce the actuator output to minimum to prevent an engine overspeed condition.
Explore Related Components
For technical manuals, wiring diagrams, and to purchase the 9907-018 or other Woodward governors, please visit our technical support center.
Recommended Similar Models
- WOODWARD 9907-014 (2301A Reverse Acting variant)
- WOODWARD 8290-184 (Electrically Powered Governor)
- WOODWARD 9905-020 (2301A High Voltage Version)
- WOODWARD 8440-1713 (EasYgen Series Controller)
- WOODWARD 9907-028 (2301A Load Sharing with Isochronous Control)
