Description
Description
The Woodward 9905-003 is a precision SPM-A Synchronizer and Load Sharing Speed Controller engineered for automated frequency matching and phase locking of industrial generators. This module facilitates the seamless paralleling of power units to a common bus, ensuring stable grid synchronization. It is widely employed in peak-shaving power plants, marine propulsion systems, and mining site microgrids to eliminate manual synchronization errors. By maintaining precise control over engine speed and load distribution, the 9905-003 prevents high-stress mechanical coupling events, thereby extending equipment service life and reducing unscheduled maintenance downtime.
Features
- Automated frequency matching and phase locking for generator paralleling.
- Proportional load-sharing control across multiple active generators.
- High-sensitivity analog control loop for precise voltage and phase monitoring.
- Robust shielding and vibration damping for reliable operation in high-EMI industrial environments.
- Selectable input voltage ranges for versatile application compatibility.
Applications
- Industrial power generation and peak-shaving plants.
- Marine propulsion and auxiliary power management.
- Mining site microgrids and distributed energy systems.
- Standby power systems requiring automatic synchronization.
Technical Specifications
| Model |
9905-003 |
| Brand |
Woodward |
| Series |
SPM-A |
| Module Type |
Load Sharing Speed Controller |
| Input Voltage |
115 VAC or 230 VAC (selectable) |
| Frequency Range |
50 or 60 Hz |
| Phase Offset Accuracy |
Less than 5 degrees |
| Operating Temperature |
-40 to +70 deg C |
Installation Guidelines
- Ensure the unit is mounted in a chassis with adequate vibration damping to protect internal components.
- Use shielded cabling for all control and sensing inputs to minimize the impact of high-EMI environments typical of engine rooms.
- Verify that the voltage selection jumpers or switches are configured correctly for your specific supply voltage (115 VAC or 230 VAC) before applying power.
- Always isolate power to the controller before performing any wiring changes or maintenance.
- Ensure proper grounding of the module chassis to the main control panel ground bus to maintain signal integrity.
FAQ
What is the primary function of the 9905-003?
The 9905-003 acts as a synchronizer to match the frequency and phase of a generator to a bus, and subsequently as a load-sharing controller to distribute electrical demand proportionally across multiple generators.
Can this unit operate on both 50 Hz and 60 Hz systems?
Yes, the Woodward SPM-A 9905-003 is designed to support both 50 Hz and 60 Hz power systems.
What environmental conditions is this controller rated for?
The module is designed for industrial environments and is rated for an operating temperature range of -40 to +70 deg C.
