Product Overview
The Woodward 9905‑708 Digital Synchronizers and Load Controllers are precision power control modules engineered for managing generator set synchronization and optimized load distribution in multi‑machine power systems. Designed for industrial and utility‑grade installations, this controller combines high‑speed digital synchronization with intelligent load sharing logic, enabling seamless paralleling of generator sets or integration with grid sources.
Its robust control algorithms and flexible communication options allow plant engineers to maintain stability, reduce transient power disturbances, and balance electrical loads across generators — all while ensuring continuous operation under demanding environmental conditions. This module is ideal for power plants, industrial complexes, marine power systems, and hybrid energy networks where reliable synchronization and load management are essential.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Woodward |
| Model | 9905‑708 |
| Product Type | Digital Synchronizer & Load Controller |
| Synchronization Method | Digital phase and frequency matching |
| Load Sharing | Proportional, isochronous, and custom modes |
| Voltage Sensing | 3‑phase AC voltage input |
| Frequency Range | 40 – 70 Hz |
| Control Outputs | Configurable relay/analog outputs |
| Digital Inputs | Multiple configurable inputs |
| Power Supply | 12 / 24 V DC |
| Operating Voltage Range | 8 – 36 V DC |
| Communication Interfaces | CANbus, Modbus RTU |
| Mounting | Panel mount or DIN‑rail compatible |
| Operating Temperature | −20 °C to +70 °C |
| Storage Temperature | −40 °C to +85 °C |
| Dimensions | 150 mm × 110 mm × 60 mm |
| Weight | Approx. 0.45 kg |
| Housing | Rugged industrial enclosure |
Application Scenarios
The 9905‑708 digital synchronizer and load controller is essential in systems that require coordinated operation of multiple power sources.
Utility and Power Generation Facilities
Synchronizes large generator sets and shares loads to maintain grid stability and system reliability.
Industrial Power Systems
Manages generator sets in factories and plants, helping to balance loads and prevent overloads during production peaks.
Marine and Offshore Energy Systems
Coordinates shipboard or offshore generator banks to ensure uninterrupted electrical supply across propulsion and auxiliary loads.
Microgrid and Renewable Integration
Combines synchronization and load management for systems integrating diesel generators, renewables, and storage sources.
Key Advantages
Accurate Real‑Time Synchronization
High‑speed digital control ensures precise phase, frequency, and voltage matching between generation sources.
Flexible Load Sharing Algorithms
Supports proportional, isochronous, and customized load distribution modes for optimized power balance.
Robust Communication Support
CANbus and Modbus RTU interfaces allow seamless integration with supervisory control systems.
Industrial‑Grade Durability
Designed to withstand vibration, heat, and electrical noise common in power generation environments.
Configurable Control Logic
Engineers can tailor synchronization and load control strategies to match specific operational requirements.
Technical FAQs
1. What is the main function of the Woodward 9905‑708?
It synchronizes generator sets and controls load sharing in multi‑machine power systems.
2. What load sharing methods are supported?
Proportional, isochronous, and customizable load sharing modes.
3. What communications interfaces are available?
CANbus and Modbus RTU for integration with SCADA and automation systems.
4. What power supply does the controller require?
The module operates on 12 V or 24 V DC power supply.
5. What voltage range does it support?
Operating voltage from 8 V to 36 V DC.
6. What types of inputs does it monitor?
It processes three‑phase AC voltage signals for synchronization functions.
7. Can it be installed in control cabinets?
Yes, it supports both panel and DIN‑rail mounting.
8. What temperature range can the controller operate in?
From −20 °C to +70 °C.
9. Is it suitable for marine installations?
Yes, its rugged design and wide temperature tolerance make it suitable for marine environments.
10. Does it support custom load logic?
Yes, programming flexibility allows tailored load sharing strategies.
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