Parallel Generator Load Sharing Solution — WOODWARD 9907-252 | Load Sharing Module
The WOODWARD 9907-252 Load Sharing Module is a precision analog control device engineered to equalize real power (kW) distribution across multiple generator sets operating in parallel. Deployed in mission-critical power plants, marine vessels, offshore platforms, and industrial facilities worldwide, this module ensures stable isochronous load sharing without hunting or instability — even under rapid load transients.
Where This Product Is Used
Engineers and plant operators specify the 9907-252 in applications where two or more generator sets must share electrical load in precise proportion:
- Data Center Backup Power Plants — Maintains equal kW loading across N+1 or N+2 diesel genset configurations, preventing single-unit overload during utility outages.
- Marine Main Propulsion & Hotel Load Systems — Installed aboard cargo ships, ferries, and offshore supply vessels to synchronize generator output and stabilize bus voltage under variable hotel and propulsion loads.
- Offshore Oil & Gas Platforms — Coordinates power generation on isolated electrical islands where grid support is unavailable and load balance is safety-critical.
- Industrial Cogeneration (CHP) Plants — Balances load between gas turbine generators and steam turbine generators in combined heat and power installations.
- Mining & Remote Site Power Systems — Manages parallel diesel gensets at off-grid mine sites, reducing fuel consumption through optimized load distribution.
- Hospital & Critical Infrastructure Emergency Power — Ensures seamless load sharing during generator paralleling events in life-safety power systems.
- Shipyard & Drydock Shore Power Systems — Coordinates multiple generator sets supplying variable loads during vessel maintenance operations.
Technical Specifications
| Part Number | 9907-252 |
| Manufacturer | WOODWARD |
| Module Type | Analog Load Sharing Module |
| Function | Real Power (kW) Load Sharing & Isochronous Control |
| Compatible Governors | WOODWARD EG, UG, PG, 2301 series and compatible analog governor systems |
| Load Sharing Signal | Analog current loop (cross-current compensation) |
| Operating Mode | Isochronous Load Sharing / Droop selectable |
| Input Power | Refer to WOODWARD technical manual for rated supply voltage |
| Weight | 1,500 g (approx.) |
| Enclosure | Panel-mount module |
| Compliance | CE, UL recognized components (verify with current datasheet) |
| Country of Origin | USA (WOODWARD Inc., Fort Collins, CO) |
Note: Always cross-reference with the official WOODWARD 9907-252 product datasheet and installation manual for the most current electrical ratings and wiring diagrams.
Why Engineers Specify This Model
- Proven Isochronous Load Sharing — The 9907-252 uses cross-current compensation to achieve tight frequency regulation (isochronous) while distributing kW load proportionally — eliminating the frequency droop penalty common in simpler droop-only systems.
- Plug-Compatible with WOODWARD Governor Ecosystem — Designed to interface directly with WOODWARD EG, UG, and 2301 series governors, minimizing integration engineering effort and reducing commissioning time.
- Analog Simplicity = High Reliability — Analog control architecture means no firmware dependencies, no cybersecurity exposure, and straightforward field troubleshooting — critical for remote or offshore installations.
- Stable Under Transient Loads — Engineered to handle sudden load steps (motor starts, large switching events) without hunting or instability across the paralleled bus.
- Long Field Service History — The 9907-252 has decades of documented deployment in marine, industrial, and power generation applications, providing a well-understood maintenance and spare-parts profile.
- Scalable to Multiple Units — The cross-current loop architecture scales to three or more paralleled generators without architectural changes.
Complete System Bill of Materials
A complete isochronous load sharing system for parallel generators typically includes the following WOODWARD components. Konmask.com stocks or can source all items:
- WOODWARD 9907-252 — Load Sharing Module (this item)
- WOODWARD 2301A / 2301D — Digital Load Sharing & Speed Control (alternative digital solution)
- WOODWARD EG-3P / EG-6P — Electro-Hydraulic Actuator
- WOODWARD 9905-292 — Load Sensor / Current Transformer Interface
- WOODWARD 9907-018 — Magnetic Speed Sensor
- WOODWARD 9907-838 — Synchronizer Module (for auto-synchronizing applications)
- Compatible Current Transformers (CT) — sized to generator rated current
- Panel-mount DIN rail enclosure and terminal blocks
Contact Konmask.com for complete BOM pricing and availability on multi-unit orders.
Compliance & Industry Standards
- IEC 60092 — Electrical installations in ships (marine applications)
- NFPA 110 — Standard for Emergency and Standby Power Systems (applicable to data center and hospital installations)
- ISO 8528 — Reciprocating internal combustion engine driven alternating current generating sets
- DNV / ABS / Lloyd’s Register — Marine classification society type approval (verify current approval status with WOODWARD)
- CE Marking — European conformity for applicable directives
- RoHS — Restriction of Hazardous Substances compliance
Buyers in regulated industries should request the current Declaration of Conformity and applicable type approval certificates from Konmask.com at time of order.
Quality Assurance & Sourcing
Konmask.com operates as a specialist industrial automation components distributor with a rigorous sourcing and quality verification process:
- Authorized & Verified Supply Chain — All WOODWARD modules are sourced through verified distribution channels. Counterfeit and grey-market parts are actively screened out.
- Pre-Shipment Inspection — Each unit undergoes visual inspection, label verification, and packaging integrity check before dispatch.
- Serialization Traceability — Serial numbers are recorded at point of sale to support warranty claims and field service documentation.
- Warranty Support — Standard manufacturer warranty applies. Konmask.com provides first-line warranty coordination with WOODWARD on behalf of buyers.
- Export Compliance — Orders are processed in compliance with applicable export control regulations (EAR/ECCN). End-use documentation may be required for certain destinations.
How to Source This Part
- Confirm Part Number — Verify 9907-252 against your existing WOODWARD governor system documentation or nameplate.
- Request a Quote — Contact Konmask.com via the form below or email [email protected] for volume pricing, lead time, and availability confirmation.
- Provide Application Details — Share generator kW rating, number of paralleled units, and existing governor model to ensure compatibility confirmation.
- Place Order & Confirm Shipping — Orders ship from our warehouse with full tracking. Express air freight available for urgent plant shutdowns.
- Technical Support — Post-delivery commissioning support available via email or phone for qualified engineers.
Application-Specific FAQ
Q: Can the 9907-252 be used with non-WOODWARD governors?
A: The module uses a standard analog cross-current compensation signal. Compatibility with third-party governors depends on their analog input specifications. Contact Konmask.com for a compatibility assessment before ordering.
Q: What is the difference between the 9907-252 and the WOODWARD 2301 series?
A: The 9907-252 is a dedicated analog load sharing module designed to augment existing governor systems. The 2301 series integrates speed control and load sharing in a single digital controller. The 9907-252 is preferred for retrofitting existing analog governor installations.
Q: How many generators can be paralleled using this module?
A: The cross-current loop architecture supports two or more generators. Practical limits depend on system design and wiring. Installations with three or more units are common in marine and industrial applications.
Q: Is this module suitable for gas turbine generator applications?
A: Yes, provided the turbine governor system accepts the analog load sharing signal. Confirm governor interface specifications with your turbine OEM before specifying.
Q: What is the typical lead time for the 9907-252?
A: In-stock units ship within 1–3 business days. For out-of-stock situations, lead time is typically 4–8 weeks depending on WOODWARD production schedules. Contact Konmask.com for current stock status.
Q: Do you provide installation and commissioning support?
A: Konmask.com provides technical documentation and remote commissioning guidance. On-site commissioning services can be arranged through our partner network for qualified projects.
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