Generator Paralleling & Isochronous Load Sharing Solution – WOODWARD GS3 9907-186 | GS3 Series
The WOODWARD GS3 9907-186 is a dedicated load sharing module engineered for isochronous parallel operation of diesel generator sets, gas gensets, and turbine-driven generators. Designed for mission-critical power plants, marine vessels, offshore platforms, and industrial microgrids, this module ensures precise real-power (kW) distribution across paralleled generating units — eliminating hunting, instability, and unequal load distribution that can damage prime movers and reduce system reliability.
Konmask.com supplies this unit as a genuine, tested, and traceable component sourced through verified industrial channels. Each unit undergoes functional inspection prior to dispatch.
Where This Product Is Used
The GS3 9907-186 is specified by power system engineers across the following environments:
- Diesel Generator Paralleling Plants — Hospitals, data centers, and industrial facilities requiring N+1 redundancy with synchronized load sharing across 2–8 gensets
- Marine & Offshore Power Systems — Drillships, FPSOs, platform supply vessels, and naval vessels operating closed-bus or open-bus paralleling schemes
- Oil & Gas Processing Facilities — Upstream wellhead power, midstream compression stations, and downstream refinery auxiliary power systems
- Utility & Cogeneration Plants — Combined heat and power (CHP) installations requiring isochronous load sharing with utility tie-line control
- Mining & Remote Site Power — Isolated microgrids where multiple gensets must share load without a utility reference
- Turbine Generator Sets — Gas turbine and steam turbine auxiliaries requiring droop-to-isochronous mode switching
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 9907-186 |
| Series / Platform | GS3 (Governor System 3) |
| Manufacturer | WOODWARD, Inc. (Fort Collins, CO, USA) |
| Function | Isochronous Load Sharing / Real Power (kW) Equalization |
| Compatible Prime Movers | Diesel engines, gas engines, gas turbines, steam turbines |
| Load Sharing Mode | Isochronous (frequency-based) & Droop-compatible |
| Communication Bus | Woodward Load Sharing Line (LSL) — analog cross-current compensation |
| Number of Units Supported | Up to 8 paralleled generating units per bus segment |
| Input Signal | Real power (kW) transducer input; 4–20 mA or 0–5 V (application-dependent) |
| Output Signal | Bias signal to governor speed reference (droop offset) |
| Supply Voltage | 18–40 VDC (nominal 24 VDC) |
| Operating Temperature | -40°C to +70°C |
| Weight | 2,180 g (approx.) |
| Enclosure / Mounting | Panel-mount, DIN-rail compatible housing |
| Certifications | CE, UL recognized; DNV-GL marine type approval (application-specific) |
Why Engineers Specify This Model
- True Isochronous Load Sharing — Maintains rated frequency (50 Hz / 60 Hz) across all paralleled units simultaneously, unlike droop-only systems that allow frequency deviation under load changes
- Cross-Current Compensation Architecture — The GS3 LSL bus averages real-power signals across all connected modules, providing inherently stable load equalization without a master/slave hierarchy
- Plug-Compatible with WOODWARD Governor Ecosystem — Direct interface with EG-3P, EG-6P, 2301A, 2301D, 505, and 723 series governors; no signal conditioning required
- Fail-Safe Droop Fallback — On LSL bus failure, each module reverts to pre-set droop mode, preventing total system collapse
- Compact Form Factor — Panel-mount design integrates into existing switchgear cubicles and MCC panels without structural modification
- Proven Field Reliability — GS3 series modules have accumulated decades of operational hours in marine class societies (DNV, Lloyd’s, ABS) certified installations
Complete System Bill of Materials
A complete isochronous load sharing system using the GS3 9907-186 typically includes the following Woodward components:
- GS3 9907-186 — Load Sharing Module (this unit) × N (one per generating unit)
- WOODWARD 2301A / 2301D — Speed/Load Control for diesel or gas engine governors
- WOODWARD EG-3P / EG-6P — Electro-hydraulic actuator for fuel rack positioning
- WOODWARD 723 / 505 — Digital governor for turbine applications
- kW Transducer — Real power measurement (e.g., WOODWARD 9905-292 or equivalent)
- Load Sharing Line (LSL) Cable — Shielded twisted-pair interconnect between all GS3 modules
- 24 VDC Power Supply — Regulated, isolated; minimum 5 A per module
- Dead Bus / Live Bus Sensing Relay — For automatic paralleling sequencing
Contact Konmask.com for complete BOM sourcing — we supply the full Woodward ecosystem.
Compliance & Industry Standards
- IEC 61000 — Electromagnetic compatibility (EMC) for industrial environments
- IEC 60092 — Electrical installations in ships (marine applications)
- DNV-GL Rules for Classification — Ships and offshore units, Part 4 Chapter 8 (Electrical installations)
- Lloyd’s Register Type Approval — Applicable to marine-certified variants
- ABS Rules for Building and Classing — Marine vessels and offshore structures
- NFPA 110 — Standard for Emergency and Standby Power Systems (data center / hospital applications)
- ISO 8528 — Reciprocating internal combustion engine driven alternating current generating sets
Quality Assurance & Sourcing
Every WOODWARD GS3 9907-186 unit supplied by Konmask.com undergoes the following verification process before shipment:
- ✅ Visual & Physical Inspection — Housing integrity, connector condition, label legibility, and serial number verification
- ✅ Functional Bench Test — Power-on verification, I/O signal response check, and LSL bus communication test where applicable
- ✅ Traceability Documentation — Serial number logging, inspection record, and sourcing chain documentation provided on request
- ✅ Anti-Counterfeit Screening — Component markings, PCB revision codes, and firmware version cross-referenced against known genuine unit databases
- ✅ Secure Packaging — ESD-safe packaging with desiccant, foam cushioning, and tamper-evident sealing for international freight
Konmask.com does not supply remarked, refurbished-as-new, or unverified surplus units. All units are represented accurately by condition grade.
How to Source This Part
- Submit an RFQ — Email support@konmask.com with your required quantity, delivery timeline, and destination port
- Receive Quotation — We respond within 1 business day with pricing, lead time, condition grade, and available inspection documentation
- Order Confirmation — Confirm PO; we issue a proforma invoice with full unit traceability details
- Quality Inspection — Unit undergoes pre-shipment inspection; inspection report issued upon request
- Shipment & Tracking — Dispatched via DHL Express, FedEx International Priority, or sea freight (LCL/FCL) per your preference
- After-Sales Support — Technical support available for installation, commissioning, and integration queries
📞 +0086 19859288691 | ✉️ support@konmask.com | 🌐 https://Konmask.com
Application-Specific FAQ
Q: Can the GS3 9907-186 be used with non-Woodward governors?
A: The LSL bus is a Woodward-proprietary analog protocol. Integration with third-party governors (Heinzmann, Barber-Colman, GAC) requires a signal interface adapter. Contact us for compatibility assessment.
Q: How many GS3 modules can share a single LSL bus?
A: The standard GS3 LSL bus supports up to 8 modules. For larger plants (9+ units), bus segmentation with tie-line load sharing controllers is required.
Q: Is this module suitable for utility paralleling (grid-tie) applications?
A: The GS3 9907-186 is optimized for isolated bus (island mode) isochronous load sharing. For utility paralleling, a supplementary import/export controller (e.g., Woodward 2301D with utility tie option) is required.
Q: What is the difference between droop and isochronous load sharing?
A: Droop sharing allows frequency to vary with load (typically 3–5% droop), which inherently distributes load but at the cost of frequency regulation. Isochronous sharing (enabled by the GS3 module) maintains rated frequency regardless of load, with the module actively equalizing kW output across all units.
Q: Can Konmask.com supply the complete GS3 load sharing system?
A: Yes. We source the full Woodward GS3 ecosystem including governors, actuators, kW transducers, and accessories. Submit a BOM for a consolidated quotation.
Q: What condition grades are available?
A: We supply New (factory-sealed), Surplus New (unused, original packaging), and Tested Serviceable (inspected, fully functional) grades. Condition is explicitly stated on all quotations.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
