Woodward 9907-173 9907-252 Load Sharing Module

The Woodward 9907-173 9907-252 Load Sharing Module is a compact and reliable device designed for precise load distribution among multiple generators or power units. Operating on a wide input voltage range of 100–240 VAC and supporting frequencies from 50 Hz to 400 Hz, it consumes just 20 W, ensuring efficient energy use. The module enables accurate and coordinated load sharing, enhancing system stability and performance in industrial and power generation applications.As part of Woodward's suite of prime mover control accessories, the 9907-173 9907-252 provides proportional load distribution logic that seamlessly integrates with governor regulators and power management systems to ensure balanced generation, improved fuel economy, and reduced mechanical stress across synchronized gensets.Its robust design delivers dependable operation under varying electrical conditions, making it ideal for complex multi-generator setups.

Model: 9907-173 9907-252
Module Type: Load sharing and bias control interface
Input Signal Type:

• Speed regulator output signal (e.g., 0–6 V DC)
• Load demand input (analog)
  

Output Signal Type: Bias or trim signal to speed regulator (proportional)
Voltage Requirements: 20–40 V DC nominal (typical industrial DC supply)
Operating Temperature: –20 °C to +70 °C
Storage Temperature: –40 °C to +85 °C
Mounting: Panel or DIN rail mounting within control cabinet
Communication: Analog signal interface (bias/trim signal, load sense)
Control Logic: Proportional bias‑based load sharing
Droop: Provides 0-10% speed reduction
Humidity: 95% RH

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Q1: What does the Woodward 9907-173 9907-252 Load Sharing Module do?
A1: The Woodward 9907-173 is a control module that coordinates load distribution across multiple generator sets running in parallel by generating proportional bias signals for speed regulators to achieve balanced load sharing.
Q2: What signal types does the 9907-173 9907-252 use?
A2: The module primarily uses analog voltage input and output signals (such as 0–6 V DC) to interface with speed regulators and load demand sensors.
Q3: Can the 9907-173 be used with both digital and analog governors?
A3: Yes - the 9907-173 can interface with either digital or analog governor regulators, as long as they accept proportional bias/trim input signals.
Q4: Is the Woodward 9907-173 9907-252 suitable for retrofit installations?
A4: Yes. Its simple analog signal interface and configurable bias parameters make the 9907-173 well‑suited for upgrade projects in existing genset control systems without needing a complete system overhaul.

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• Proportional Load Sharing:The Woodward 9907-173 9907-252 calculates real‑time load distribution and delivers proportional bias signals to speed regulators to achieve even sharing among multiple generator sets.
• Integration with Speed Regulators:Works alongside digital or analog governor controls to translate load demand into controlled speed bias adjustments.
• Simple Analog Interface:Uses industry‑standard analog signaling (e.g., 0–6 V DC) for both inputs and outputs, giving system designers flexibility with existing controllers and transducers.
• Fuel Efficiency Improvement:Balanced loading across parallel machines reduces fuel consumption and minimizes wear on individual gensets.
• Retrofit Friendly:Can be added to existing control systems to upgrade load sharing performance without full system replacement.
• Reduced Mechanical Stress:By coordinating load sharing, the module helps avoid uneven loading that can accelerate wear on prime movers.

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