WOODWARD 9907-173 – Load Sharing Module | Woodward Governor Control Platform
Engineering Background
The WOODWARD 9907-173 is a dedicated Load Sharing Module engineered for synchronization and load distribution across parallel generator sets and prime mover systems. Designed within Woodward’s proven governor control architecture, this module enables precise isochronous load sharing in both island-mode and grid-connected applications — a critical requirement for industrial power plants, marine propulsion systems, and mission-critical standby generation.
Product Positioning
Targeted at OEM integrators, plant maintenance engineers, and system commissioning teams, the 9907-173 serves as the communication and control backbone for multi-unit paralleling. It interfaces directly with Woodward governor controllers (EG, DSLC, MSLC series) to balance real power (kW) and reactive power (kVAR) loads without operator intervention — reducing fuel consumption variance and preventing generator hunting.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | WOODWARD |
| Part Number | 9907-173 |
| Module Type | Load Sharing Module (LSM) |
| Platform Series | Woodward Governor Control |
| Function | Isochronous load sharing & synchronization |
| Compatible Controllers | EG Series, DSLC, MSLC, 2301 Series governors |
| Communication Interface | Woodward proprietary load sharing bus |
| Load Sharing Type | Real power (kW) & reactive power (kVAR) |
| Operating Voltage | Refer to OEM documentation (typically 18–32 VDC) |
| Operating Temperature | -40°C to +70°C |
| Enclosure / Form Factor | DIN-rail / panel-mount module |
| Weight | 1,480 g (as listed) |
| Certifications | CE, UL (verify with Woodward datasheet) |
| Country of Origin | USA |
| Condition Available | New surplus / Tested used / Refurbished |
Note: Always cross-reference with the official Woodward 9907-173 product manual before installation. Specifications subject to revision by manufacturer.
Proven Application Environments
- Diesel & Gas Generator Paralleling — Island-mode multi-genset plants requiring isochronous load sharing without grid reference
- Marine Propulsion & Auxiliary Power — Shipboard generator synchronization per class society requirements
- Industrial Power Plants — Cogeneration (CHP) and combined-cycle plants with multiple prime movers
- Oil & Gas Facilities — Offshore platforms and onshore processing plants with redundant generation
- Data Center & Critical Infrastructure — N+1 generator configurations requiring seamless load transfer
- Mining & Heavy Industry — Remote site power systems with variable load profiles
Engineering Advantages
- Isochronous Stability — Maintains constant frequency under varying load conditions across all paralleled units
- Plug-and-Play Integration — Direct compatibility with existing Woodward governor ecosystems minimizes retrofit engineering hours
- Dual-Channel Load Balancing — Simultaneous kW and kVAR sharing prevents reactive power circulation between generators
- Fault Isolation — Module-level architecture allows hot-swap replacement without full system shutdown (verify with site SOP)
- Proven Field Reliability — Woodward’s 100+ year heritage in governor control; 9907-series widely deployed in global power infrastructure
- Reduced Commissioning Time — Pre-calibrated load sharing parameters reduce site tuning from days to hours
System Architecture & Signal Flow
The 9907-173 operates as a peer node on the Woodward load sharing bus. Each paralleled generator unit connects one LSM to the shared bus. The module samples real and reactive power outputs from the local generator’s CT/PT inputs, compares them against the bus average, and generates a bias signal fed to the governor’s speed reference input — continuously trimming output to equalize load distribution.
- Input: Generator CT/PT signals (real & reactive power measurement)
- Bus: Woodward load sharing communication link (daisy-chain topology)
- Output: Bias signal → Governor speed/droop reference
- Supervisory: Compatible with DSLC/MSLC master controllers for advanced synchronizing and dead-bus closing
Sourcing & Quality Verification
Konmask.com sources WOODWARD 9907-173 modules through verified industrial surplus channels and authorized distribution networks. Each unit undergoes the following pre-shipment process:
- Visual inspection: housing integrity, connector condition, label legibility
- Part number & revision code verification against Woodward documentation
- Functional bench test where applicable (tested-used units)
- Anti-static packaging with humidity indicator card
- Certificate of conformance available on request
Condition grades: New Surplus (NS) | Tested Used (TU) | Refurbished (RF) — please specify at inquiry.
Procurement Process
- Submit RFQ — Contact support@konmask.com with part number, quantity, required condition grade, and delivery timeline
- Receive Quote — Price, lead time, and stock confirmation within 1 business day
- Order Confirmation — PO accepted; payment via T/T, PayPal, or trade terms for qualified accounts
- Quality Check & Dispatch — Pre-shipment inspection report issued; shipped via DHL / FedEx / sea freight per requirement
- After-Sales Support — Technical documentation, warranty terms, and return policy per Konmask standard terms
Minimum order: 1 unit. Volume pricing available for orders of 5+ units.
Technical FAQ
Q: Is the 9907-173 compatible with non-Woodward governors?
A: The load sharing bus is Woodward-proprietary. Integration with third-party governors requires a signal converter or custom interface — consult our technical team.
Q: What is the difference between 9907-173 and 9907-174?
A: Revision suffixes typically indicate hardware or firmware changes. Always verify the exact revision required by your system’s BOM with Woodward’s compatibility matrix.
Q: Can this module be used for droop mode operation?
A: The 9907-173 is optimized for isochronous (no-droop) load sharing. Droop mode is typically handled at the governor level; consult your system integrator.
Q: What documentation is available?
A: Woodward product manual, wiring diagrams, and application notes available upon request. Contact support@konmask.com.
Q: Do you offer exchange / core return programs?
A: Yes, core exchange pricing is available for refurbished units. Inquire at time of RFQ.
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