Description
Product Overview
The Woodward 9905-001-L is a SPM-A series synchronization module designed to ensure precise frequency and phase matching between an offline generator (or turbine) and an online system (e.g., utility grid or another generator). As a critical component of generator control systems, it facilitates seamless parallel operation, preventing electrical faults (e.g., phase mismatch, frequency deviations) and optimizing power transfer efficiency.
The 9905-001-L is part of Woodward’s SPM-A family, which is widely used in industries where generator reliability and grid compliance are paramount—such as power plants, cogeneration facilities, and marine propulsion systems. Its revision L designation indicates updated firmware/hardware for improved performance and compatibility with modern control systems.
Key Technical Specifications
While detailed technical data for the 9905-001-L is limited in public sources, insights from Woodward SPM-A series documentation and used equipment listings suggest the following key specifications:
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Input Voltage: 115/230V AC (RMS) – compatible with global power systems.
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Frequency Range: 50/60 Hz – supports both European (50 Hz) and North American (60 Hz) grid standards.
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Phase Angle Matching: ±10° – ensures minimal phase difference between the offline and online systems during synchronization.
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Power Consumption: ≤5 W – low power design for continuous operation.
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Operating Temperature: -40°C to +70°C (-40°F to +158°F) – suitable for harsh industrial environments.
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Dimensions: Approximately 12.5 inches (length) – compact for cabinet installation.
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Weight: ~1.4 kg (3 lbs) – lightweight for easy handling during maintenance.
Note: For definitive technical parameters, refer to Woodward’s official SPM-A series manual or contact Woodward customer support.
Woodward 9905-001-L
Field Application & Problem Solved
In industrial power systems, improper generator synchronization (e.g., frequency mismatch, phase difference) can lead to:
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Electrical faults (e.g., short circuits, equipment damage).
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Grid penalties (e.g., fines for frequency deviations).
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Downtime (e.g., generator tripping, process interruptions).
The 9905-001-L addresses these challenges by:
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Precise Frequency Matching: It adjusts the offline generator’s speed to match the online system’s frequency (50/60 Hz) within ±0.1 Hz, ensuring compliance with grid requirements.
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Phase Alignment: It aligns the generator’s phase with the online system’s phase (±10° tolerance), preventing phase mismatch faults.
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Automatic Breaker Closure: Once synchronization is achieved, the module sends a contact closure signal to close the circuit breaker, enabling smooth power transfer.
Typical Applications:
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Power Generation: Synchronizing standby generators to the utility grid during peak demand or outages.
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Cogeneration: Balancing electrical and thermal loads by paralleling generators with turbine-driven compressors.
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Marine Propulsion: Synchronizing shipboard generators for auxiliary power generation.
Installation & Maintenance Pitfalls (Expert Tips)
To ensure optimal performance of the 9905-001-L, follow these best practices:
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Verify Voltage Compatibility:
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Confirm that the input voltage (115/230V AC) matches the module’s rating. Mismatched voltage can damage the internal circuitry—use a multimeter to check the input voltage before installation.
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Check Phase Angle Settings:
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Adjust the phase angle matching range (±10°) according to the application’s requirements. For example, a power plant may require a tighter phase tolerance (±5°) to comply with grid standards.
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Test Synchronization Logic:
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After installation, test the synchronization logic using a signal generator to simulate frequency/phase changes. Verify that the module correctly adjusts the generator’s speed and sends a breaker closure signal when synchronization is achieved.
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Perform Regular Maintenance:
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Inspect the module annually for signs of wear (e.g., cracked casings, loose connections). Clean the module’s connectors with isopropyl alcohol to remove dirt and debris, which can cause communication failures.
Woodward 9905-001-L
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Technical Deep Dive & Overview
The 9905-001-L operates on Woodward’s SPM-A synchronization algorithm, which combines:
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Frequency Measurement: The module measures the online system’s frequency using a phase-locked loop (PLL) circuit.
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Speed Adjustment: It sends a control signal to the generator’s actuator (e.g., fuel valve) to adjust the generator’s speed until it matches the online system’s frequency.
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Phase Matching: Once the frequency is matched, the module aligns the generator’s phase with the online system’s phase using a phase comparator.
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Breaker Closure: When both frequency and phase are synchronized, the module sends a contact closure signal to close the circuit breaker, enabling parallel operation.
What sets the 9905-001-L apart is its revision L update, which includes:
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Improved firmware for better frequency stability.
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Enhanced compatibility with modern generators and control systems.
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Reduced power consumption for increased efficiency.
Final Notes
The Woodward 9905-001-L is a critical component for ensuring reliable generator synchronization in industrial power systems. Its precise frequency/phase matching capabilities and compatibility with global power standards make it an essential tool for maintaining grid compliance and preventing electrical faults.
When installing or maintaining the 9905-001-L, always adhere to Woodward’s guidelines and consult with a certified technician to ensure optimal performance. For more detailed information, refer to Woodward’s official SPM-A Series Synchronizer Manual (Document # SPM-A-OM-001) or contact Woodward’s customer support for application-specific advice.
