Buy Woodward 9905-373 REV T Synchronizer for Multi-Gen Systems

Product Overview

The Woodward 9905-373 REV T stands as a sophisticated Digital Synchronizer and Load Control (DSLC) module designed for high-precision paralleling of multiple generator sets. This microprocessor-based controller automates the matching of voltage, frequency, and phase angles between generators and the utility grid. As a 100% Brand New original unit, the 9905-373 REV T provides a critical digital upgrade path for legacy analog systems, delivering superior stability and faster synchronization times for industrial, marine, and emergency backup power applications.

Technical Specifications

The 9905-373 REV T utilizes advanced digital logic to maintain millisecond-accurate control over the power bus.

Engineering Advantages

• Precision Phase Matching: The 9905-373 REV T eliminates the "guesswork" of manual synchronization. It continuously calculates the slip frequency and closes the breaker at the exact zero-crossing point, preventing massive mechanical torque spikes and electrical transients.

• Isochronous Load Sharing: This module coordinates multiple generators on a single bus to ensure proportional load distribution. It forces each unit to carry its fair share of the kW demand, preventing "light loading" or overloading of individual prime movers.

• Extreme Environment Reliability: Designed for the rigorous demands of marine engine rooms and remote industrial sites, the hardware maintains operational integrity across a massive temperature window (-40 °C to +70 °C).

• Seamless Woodward Ecosystem Integration: The DSLC communicates natively with Woodward speed governors and voltage regulators. This unified control architecture simplifies the wiring harness and reduces the time required for commissioning complex multi-genset lineups.

• Digital Upgrade Over Analog: Revision T offers enhanced noise immunity and faster processing speeds compared to earlier DSLC versions. This upgrade effectively removes the drift associated with aging analog components, providing a "set and forget" solution for grid-parallel operations.

FAQs

Q: What are the main benefits of the REV T update for the 9905-373?

A: The Revision T update incorporates improved internal components that offer better resistance to electromagnetic interference (EMI) and more stable analog outputs. This ensures that the 50 mA control signal sent to the governor remains clean and jitter-free, even in electrically noisy industrial environments.

Q: Can the 9905-373 REV T operate in a standalone island mode?

A: Yes. While it excels at grid-parallel operation, the DSLC also manages load sharing between generators when completely disconnected from the utility (Island Mode), maintaining frequency and voltage stability for the local site.

Q: Is the unit compatible with 240VAC systems?

A: This specific model (9905-373) is rated for 120 VAC input. If your sensing bus is 240VAC or higher, you must use appropriate potential transformers (PTs) to step the voltage down to the 120VAC range required by the module's sensing circuit.

Q: Does this module provide any generator protection features?

A: Yes. The DSLC includes basic protective functions, such as reverse power protection, which prevents a generator from being "motored" by the grid or other generators if its prime mover fails.