Description
🔹 Product Description
The WOODWARD SPM-A Synchronizer 9907-028 is an electronic synchronizing module designed for generator control applications. It provides automatic synchronization functions by monitoring generator voltage, frequency, and phase conditions before connecting a generator to a power bus.
The SPM-A Synchronizer is designed for use in power generation systems where accurate generator paralleling and stable operation are required. It works together with governors, voltage regulators, circuit breakers, and generator control equipment to ensure proper synchronization conditions before closing the breaker.
This Woodward synchronizer is suitable for diesel generator sets, gas engines, marine power systems, and industrial power-generation applications. Before replacement or commissioning, verify the complete model number, generator specifications, voltage configuration, wiring connections, and control-system compatibility.

9907-028
📋 Product Datasheet
• Brand: WOODWARD
• Model: 9907-028
• Series: SPM-A Synchronizer Series
• Product Name: Automatic Synchronizer Module
• Product Type: Generator Synchronizing Controller
• Application: Generator Paralleling and Power Management
• Function: Voltage, Frequency, and Phase Matching Control
• Input Signal: Generator and Bus Electrical Measurements
• Output Signal: Breaker Closing / Synchronizing Control
• Mounting Type: Panel Mounted Control Module
• Power Supply: DC Control Power
• Dimensions: Approx. 200 × 120 × 50 mm
• Weight: Approx. 1.0 kg
• Origin: United States
• Condition: New / Used Condition To Be Confirmed
🔧 Key Features
• Woodward SPM-A automatic synchronizing technology
• Provides generator paralleling control functions
• Monitors voltage, frequency, and phase relationship
• Supports reliable circuit-breaker synchronization
• Designed for industrial generator systems
• Compatible with engine control and power management equipment
• Suitable for marine and stationary power applications
• Useful for generator maintenance and replacement projects
⚙️ Application
The WOODWARD SPM-A Synchronizer 9907-028 is used in generator control systems requiring automatic synchronization before connecting a generator to an electrical bus. The module evaluates generator and bus conditions and provides control outputs when synchronization parameters are within acceptable limits.
Typical applications include diesel generator sets, gas generator systems, marine power plants, standby power systems, and industrial power distribution equipment.
For replacement applications, confirm the complete 9907-028 model number, generator voltage, frequency settings, breaker control wiring, governor compatibility, excitation system, and existing synchronization configuration before installation.
❓ FAQ
Q1: What is the WOODWARD 9907-028?
A: It is an SPM-A Synchronizer module designed for automatic generator synchronization applications.
Q2: What is the main function of this synchronizer?
A: It matches generator voltage, frequency, and phase with the power bus before breaker closing.
Q3: Where is the SPM-A Synchronizer used?
A: It is used in industrial generators, marine power systems, and standby power applications.
Q4: Can this unit replace another Woodward synchronizer?
A: Replacement depends on generator specifications, wiring configuration, system settings, and application requirements.
Q5: What should be checked before installation?
A: Verify the model number, electrical ratings, generator parameters, breaker interface, control wiring, and system configuration.
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