Woodward 9905-373 DSLC Digital Synchronizer Load Control

Woodward 9905-373 DSLC Digital Synchronizer and Load Control

The Woodward 9905-373 DSLC delivers precision synchronization and intelligent load management for generator paralleling applications. Engineered for mission-critical power generation environments, this digital synchronizer ensures seamless integration of multiple generator sets with utility grids or islanded systems.

Technical Specifications

• Model: 9905-373
• Type: Digital Synchronizer and Load Control (DSLC)
• Voltage Sensing: 50-600 VAC, 3-phase or single-phase
• Frequency Range: 45-65 Hz
• Synchronization Accuracy: ±5 electrical degrees
• Load Sharing Accuracy: ±2% of rated load
• Operating Temperature: -40°C to +70°C
• Power Supply: 18-32 VDC or 88-132 VAC
• Communication: Modbus RTU, RS-485
• Mounting: Panel or DIN rail compatible

Key Applications

The 9905-373 excels in demanding power generation scenarios where reliability and precision synchronization are non-negotiable:

• Multi-Generator Paralleling: Synchronize up to 32 generator sets for scalable power capacity
• Grid-Tie Operations: Seamlessly connect standby generators to utility grids during peak demand or outages
• Island Mode Control: Manage isolated power systems in remote facilities, marine vessels, or microgrids
• Load Sharing Networks: Distribute electrical loads proportionally across parallel generators to optimize fuel efficiency
• Peak Shaving Systems: Reduce utility demand charges by intelligently dispatching on-site generation

Advanced Control Solutions

This synchronizer integrates sophisticated algorithms that monitor voltage magnitude, frequency, and phase angle in real time. When parameters align within preset windows, the module initiates breaker closure with millisecond precision, preventing mechanical stress and electrical transients.

Adaptive Load Sharing: The DSLC continuously adjusts governor setpoints to maintain proportional load distribution, compensating for droop characteristics and fuel variations across dissimilar engine types.

Fault Protection: Built-in diagnostics detect reverse power, over/under voltage, frequency deviation, and synchronization failures, triggering protective actions to safeguard equipment.

Common Questions

Q: Can the 9905-373 synchronize generators with different ratings?
A: Yes, the DSLC supports mixed-capacity paralleling. Configure load sharing parameters to match each generator's rated output, ensuring proportional contribution without overloading smaller units.

Q: Is this module compatible with renewable energy sources?
A: Absolutely. The 9905-373 integrates with solar inverters, wind turbines, and battery storage systems that present grid-compatible AC waveforms, enabling hybrid power architectures.

Q: What communication protocols are supported?
A: The module features Modbus RTU over RS-485, allowing integration with SCADA systems, PLCs, and building management platforms for remote monitoring and control.

Q: How does the synchronizer handle frequency drift?
A: The DSLC tracks frequency deviation in real time and adjusts synchronization timing dynamically. If drift exceeds configurable limits, the module aborts closure and alerts operators.

Warranty & Support

Every Woodward 9905-373 DSLC module includes a 12-month manufacturer warranty covering defects in materials and workmanship. Our technical support team provides configuration assistance, troubleshooting guidance, and firmware updates to ensure optimal performance throughout the product lifecycle.

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