Description
Woodward 9905-003 SPM-A Speed & Phase Matching Synchronizer
1. Product Description
The Woodward 9905-003 is a precision-engineered synchronizer designed for automatic frequency and phase matching in generator systems, ensuring seamless synchronization and stable load sharing. Specifically tailored for use with Woodward’s 2301, 2301A, and EPG (Electrically Powered Governor) control systems, this module supports applications involving diesel, gas, steam, or gas turbine-driven generators. Key functions include adjustable synchronization dynamics, voltage matching (optional), and automatic circuit breaker closure. While now obsolete, the 9905-003 remains valued for its reliability in legacy systems, though modern replacements like Woodward’s Touchpoint Pro or Unipoint controllers are recommended for new installations.
The Woodward 9905-003 is a precision-engineered synchronizer designed for automatic frequency and phase matching in generator systems, ensuring seamless synchronization and stable load sharing. Specifically tailored for use with Woodward’s 2301, 2301A, and EPG (Electrically Powered Governor) control systems, this module supports applications involving diesel, gas, steam, or gas turbine-driven generators. Key functions include adjustable synchronization dynamics, voltage matching (optional), and automatic circuit breaker closure. While now obsolete, the 9905-003 remains valued for its reliability in legacy systems, though modern replacements like Woodward’s Touchpoint Pro or Unipoint controllers are recommended for new installations.
2. Key Technical Parameters
| Parameter | Specification |
|---|---|
| Module Type | Speed & Phase Matching Synchronizer |
| Input Voltage | 20–40 V DC (low-voltage models) / 88–132 V AC/DC (high-voltage models) |
| Frequency Range | 45–65 Hz |
| Phase Matching Accuracy | ±1° |
| Load Sharing Control | Isochronous or Droop mode |
| Communication | Serial RS-485/422/232 (Modbus RTU) |
| Operating Temperature | -40°C to +70°C |
| Dimensions | 24.1 cm × 14.0 cm × 5.1 cm |
| Weight | 0.5 kg |
WOODWARD 9905-003
3. Advantages and Features
- Precision Synchronization: Ensures accurate frequency and phase matching to prevent generator damage during paralleling.
- Modular Design: Supports expansion with additional I/O modules for complex systems.
- Rugged Performance: Withstands extreme temperatures and vibrations typical of industrial environments.
- User-Friendly Interface: Front-panel controls for easy configuration and diagnostics.
- Longevity: MTBF exceeding 30,000 hours in typical operating conditions.
4. Application Areas and Use Cases
- Power Generation: Synchronizes generators in standalone or grid-connected power plants.
- Marine Systems: Manages load sharing in shipboard power systems.
- Industrial Manufacturing: Controls backup power supply synchronization in factories.
- Oil & Gas: Supports generator integration in remote offshore platforms.
Example Case: A North American industrial plant used the 9905-003 to synchronize backup generators during grid outages, maintaining critical operations with 99.9% uptime.
5. Competitor Comparison
Compared to similar synchronizers:
Compared to similar synchronizers:
- Broader Compatibility: Works with Woodward’s extensive governor portfolio (2301A, EPG) versus limited third-party integrations.
- Higher Phase Accuracy: ±1° precision vs. typical ±2° in competitor models.
- Simplified Configuration: Front-panel adjustments reduce commissioning time by 30% compared to fully digital alternatives.
WOODWARD 9905-003
6. Selection Recommendations
- System Age: For legacy setups, consider refurbished 9905-003 units; new projects should adopt Woodward’s Touchpoint Pro or Unipoint systems.
- Load Requirements: Choose the high-voltage model (88–132 V AC/DC) for large generators.
- Space Constraints: Opt for rack-mounted versions (19-inch) for dense control panels.
- Budget: Refurbished units offer cost savings but may lack warranty coverage.
7. Precautions
- Obsolete Status: Spare parts are no longer available; plan for system upgrades.
- Installation: Use shielded cables to prevent EMI/RFI interference.
- Safety: Ensure an independent overspeed shutdown system is installed per NEC/CE standards.
- Maintenance: Regularly inspect for dust buildup and verify firmware compatibility.
