Generator Paralleling Solution – WOODWARD 5500-577 | Load Share Module
Where This Product Is Used
The WOODWARD 5500-577 Load Share Module is deployed wherever multiple generator sets must operate in parallel with precise load distribution. Typical installation environments include:
- Diesel Power Plants & Genset Farms — Balances active (kW) and reactive (kVAR) load across 2–8 paralleled generator sets to prevent circulating currents and thermal overload.
- Marine Propulsion & Offshore Platforms — Maintains stable bus voltage and frequency under dynamic load swings on vessels and drilling rigs where grid support is unavailable.
- Data Center & Critical Facility Backup Power — Ensures seamless load sharing during utility outage events, preventing single-genset overload in N+1 redundancy configurations.
- Industrial Microgrids & Island-Mode Grids — Coordinates isochronous load sharing for factories, mines, and remote sites operating independently of the utility grid.
- Hospital & Mission-Critical Standby Systems — Provides deterministic load distribution required by NFPA 110 Level 1 emergency power supply systems (EPSS).
- Cogeneration (CHP) Plants — Manages load sharing between gas engine gensets and utility tie points in combined heat and power installations.
Technical Specifications
| Part Number | 5500-577 |
| Manufacturer | WOODWARD |
| Product Family | 5500 Series Load Sharing & Speed Control |
| Function | Analog load share module for isochronous parallel generator sets |
| Load Sharing Mode | Active power (kW) & reactive power (kVAR) sharing |
| Communication | Load share line (LSL) analog bus — compatible with WOODWARD 2301, 505, EG series governors |
| Input Voltage | Refer to OEM documentation (typically 18–32 VDC) |
| Operating Temperature | –40 °C to +70 °C |
| Weight | 300 g (approx.) |
| Mounting | Panel / DIN rail compatible enclosure |
| Compatibility | WOODWARD 2301A, 2301D, 505, EG3P, MicroNet governors |
Why Engineers Specify This Model
- Proven Analog Architecture — The 5500-577 uses a battle-tested analog load share line protocol, eliminating digital communication latency and simplifying retrofit into legacy governor systems.
- Simultaneous kW & kVAR Sharing — Independently trims both active and reactive load, preventing reactive circulating currents that cause unnecessary generator heating and derating.
- Drop-In Compatibility — Designed as a plug-compatible upgrade or replacement within the WOODWARD 5500 series ecosystem, minimizing re-engineering effort.
- Robust Industrial Rating — Wide temperature range and vibration-tolerant construction suit harsh marine, mining, and outdoor power plant environments.
- Simplified Commissioning — Analog trim potentiometers allow field technicians to balance load sharing without specialized software tools.
Complete System Bill of Materials
For a fully functional parallel generator control system using the 5500-577, engineers typically specify the following complementary WOODWARD components:
- WOODWARD 2301A / 2301D — Isochronous speed governor (one per genset)
- WOODWARD EG3P / EG6P — Electronic actuator (one per genset)
- WOODWARD 9905-032 — Magnetic pickup (MPU) speed sensor
- WOODWARD 505 — Steam/gas turbine control (for CHP applications)
- Automatic Voltage Regulator (AVR) — Compatible with Basler, Stamford, or Leroy-Somer alternators
- Synchronizer relay — For automatic bus synchronization before paralleling
- Load share bus wiring harness — Shielded twisted pair, per WOODWARD installation manual
Contact support@konmask.com for complete BOM assistance and cross-reference support.
Compliance & Industry Standards
- IEC 60034 — Rotating electrical machines (generator compatibility)
- ISO 8528 — Reciprocating internal combustion engine driven alternating current generating sets
- NFPA 110 — Standard for Emergency and Standby Power Systems (Level 1 & Level 2 EPSS)
- DNV / ABS / Lloyd’s Register — Marine type approval applicable for offshore and vessel installations (verify current certificate status with WOODWARD)
- CE Marking — European conformity for industrial control equipment
- RoHS Compliant — Restriction of Hazardous Substances
Quality Assurance & Sourcing
Konmask.com sources the WOODWARD 5500-577 exclusively through verified industrial automation distributors and authorized supply channels. Every unit offered is:
- Inspected for original WOODWARD labeling, date codes, and packaging integrity
- Cross-referenced against WOODWARD’s published part number database
- Stored in ESD-safe, climate-controlled warehousing
- Shipped with full traceability documentation upon request
- Backed by Konmask’s sourcing guarantee — if a unit fails incoming inspection at your facility, we replace it
We do not list, sell, or knowingly source counterfeit or remarked components. Suspect parts are quarantined and reported.
How to Source This Part
- Confirm your governor model — Verify your existing WOODWARD governor part number to ensure load share line compatibility.
- Check quantity & lead time — Contact us at support@konmask.com or call +0086 19859288691 for real-time stock status.
- Request a quotation — Provide your project name, required quantity, and delivery location. We respond within 1 business day.
- Place your order — Secure checkout via this product page, or request a proforma invoice for bank transfer / corporate PO.
- Receive & verify — Inspect upon arrival. Our team supports incoming inspection queries and provides documentation as needed.
Application-Specific FAQ
Q: Can the 5500-577 be used with non-WOODWARD governors?
A: The 5500-577 is designed for WOODWARD’s analog load share line (LSL) protocol. Integration with third-party governors is possible if they support a compatible analog load share input, but requires engineering validation. Contact us for application support.
Q: How many generators can be paralleled using this module?
A: The analog LSL bus typically supports 2–8 generator sets in parallel. Larger configurations may require additional signal conditioning or a digital load sharing system such as the WOODWARD DSLC.
Q: Is this module suitable for marine classification society requirements?
A: WOODWARD products in this series have been used in DNV, ABS, and Lloyd’s Register classified vessels. Verify the specific certificate revision applicable to your vessel’s class survey with your classification society.
Q: What is the difference between the 5500-577 and the WOODWARD DSLC?
A: The 5500-577 is an analog load share module suited for retrofit and legacy systems. The DSLC (Digital Synchronizer and Load Control) is a fully digital solution with CAN/Modbus communication, suited for new-build projects requiring advanced automation and SCADA integration.
Q: Do you provide installation and commissioning support?
A: Konmask.com provides pre-sales technical consultation and documentation support. For on-site commissioning, we can refer you to qualified WOODWARD service partners in your region.
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Contact: support@konmask.com | +0086 19859288691
