Description

The WOODWARD 9907-1365 is a high-precision digital synchronizer and load control module engineered for automatic synchronization and parallel operation of generator sets in mission-critical power systems. Designed as part of WOODWARD’s comprehensive engine and turbine control ecosystem, the WOODWARD 9907-1365 integrates advanced phase-matching algorithms, slip frequency control, and breaker-close logic to ensure safe, smooth, and compliant connection of generators to live buses or utility grids. This module is commonly deployed alongside WOODWARD governors such as the 2301A, EGT, or SPC series, providing closed-loop coordination between speed, voltage, and breaker timing.

As a standalone or system-integrated solution, the WOODWARD 9907-1365 eliminates manual synchronization risks by continuously monitoring voltage magnitude, frequency difference, and phase angle—only issuing a close command when all parameters fall within user-defined windows. Its robust design supports both islanded (black-start) and grid-connected modes, making it ideal for data centers, hospitals, oil & gas platforms, and renewable hybrid microgrids. With built-in diagnostics, configurable deadbands, and fail-safe interlocks, the WOODWARD 9907-1365 enhances operational reliability while reducing wear on mechanical breakers and prime movers.

Technical Specifications

Main Features and Advantages

Automatic precision synchronization: The WOODWARD 9907-1365 continuously compares generator and bus voltages in real time, adjusting engine speed and excitation via analog or discrete signals to minimize phase slip. It calculates the optimal breaker closure point—typically at <2>

Configurable sync windows and safety logic: Users can define tight or relaxed limits for voltage difference (±1% to ±10%), frequency differential (<0>WOODWARD 9907-1365 includes built-in anti-pumping protection, out-of-step blocking, and “sync inhibit” inputs to prevent closure during faults or abnormal conditions—ensuring compliance with IEEE 1547 and local grid codes.

Seamless integration with WOODWARD control platforms: Designed to interface natively with WOODWARD 2301A, SPC, and EGT controllers, the WOODWARD 9907-1365 shares speed and load reference signals over hardwired I/O or Modbus. It supports both single-unit and multi-unit paralleling, enabling isochronous load sharing or droop-based coordination without external PLCs. The module’s three relay outputs provide clear status indication: “Sync OK,” “Breaker Close Command,” and “System Fault”—simplifying integration into existing HMI or SCADA systems.

Robust industrial design: Housed in a compact, convection-cooled enclosure, the WOODWARD 9907-1365 operates reliably in high-vibration environments typical of marine, mining, or standby power applications. Its wide universal power input eliminates the need for external power supplies, while conformal coating protects internal circuits from humidity and contaminants.

Application Field

The WOODWARD 9907-1365 is widely used in facilities where uninterrupted, synchronized power generation is non-negotiable. In data centers, it enables rapid auto-transfer between utility and multiple diesel generator sets during outages, ensuring seamless UPS support and IT continuity. Hospitals rely on the WOODWARD 9907-1365 to maintain life-support systems during grid failures by synchronizing backup generators within seconds—without disrupting sensitive medical equipment.

In oil & gas offshore platforms, the WOODWARD 9907-1365 manages parallel operation of gas turbine generators under harsh marine conditions, supporting black-start capability and load shedding during emergencies. Renewable microgrids also deploy the WOODWARD 9907-1365 to synchronize biogas or diesel gensets with solar inverters and battery storage, maintaining stable frequency during cloud transients or sudden load changes. Additionally, industrial plants use the WOODWARD 9907-1365 for peak shaving, where generators are automatically synchronized to the grid during high-demand periods to reduce utility demand charges. Across all these scenarios, the WOODWARD 9907-1365 delivers faster, safer, and more repeatable synchronization than manual methods—enhancing both equipment longevity and operational resilience.

Related Products

9907-1364: Analog predecessor to 9907-1365—less flexible, no digital communication
2301A-D1: WOODWARD speed controller often paired with 9907-1365 for integrated engine-governor-synchronizer loops
EGT-15: Electronic governor for gas turbines that interfaces directly with 9907-1365 for load sharing
SPC-1: Standalone programmable controller that can replace or complement 9907-1365 in complex paralleling schemes
5461-490: WOODWARD voltage regulator (AVR) frequently used alongside 9907-1365 for full generator control
9907-1665: Enhanced version with Ethernet/IP and expanded I/O—successor in newer installations
ISB-100: WOODWARD’s intelligent synchronizing breaker module—works in tandem with 9907-1365 for high-speed closure

Installation and Maintenance

Pre-installation preparation: Before installing the WOODWARD 9907-1365, verify that PT (potential transformer) and CT (current transformer) ratios match the generator and bus voltage levels. Ensure clean, shielded cabling for all analog inputs (generator/bus voltage) to avoid noise-induced sync errors. Confirm that the breaker control circuit includes anti-pumping relays and that the close coil voltage matches the WOODWARD 9907-1365’s relay rating (typically 120/240 VAC). Configure sync windows via front-panel DIP switches or Modbus registers based on site-specific grid requirements—tighter tolerances for sensitive loads, looser for rugged industrial sites.

Maintenance recommendations: The WOODWARD 9907-1365 requires no routine calibration but should undergo annual functional testing using simulated voltage inputs to validate phase-matching accuracy and relay response. Inspect terminal connections for corrosion or loosening, especially in high-humidity environments. If the “Sync Fail” LED illuminates repeatedly, check for PT phasing errors, excessive bus voltage distortion, or governor sluggishness—not a fault of the WOODWARD 9907-1365 itself. Always power down the unit before removing it from the DIN rail to prevent backfeed through signal lines. Store spare WOODWARD 9907-1365 modules in static-safe packaging away from strong magnetic fields that could affect internal components.