The Woodward 9907-175A Load Sharing Module is a high-performance analog controller designed to manage real-time load distribution among multiple generators operating in parallel. Engineered for precision and stability, this module ensures that electrical loads are shared proportionally, preventing individual generator overloads and improving overall system efficiency.

Part of Woodward’s renowned analog control product line, the 9907-175A plays a critical role in both islanded and grid-connected generator systems. It balances the load by adjusting the torque bias signal sent to electronic or mechanical governors, maintaining synchronization and stability across units.

The 9907-175A is well-suited for use in mission-critical applications, such as power stations, marine power plants, industrial generator banks, and backup power systems. Its rugged construction and wide environmental tolerance make it ideal for harsh operating conditions.

Technical Specifications

Product Applications

The 9907-175A is widely used in generator control systems where reliable load balancing is essential:

• Industrial Power Plants

  Balances multiple generator units to optimize system output and performance.

• Marine Generator Systems

  Ensures proper power distribution between main and auxiliary marine generators.

• Backup Power Systems

  Used in hospitals, data centers, and airports to manage standby generator sets.

• Oil & Gas Fields

  Distributes load among generators in isolated or remote environments.

• Mining and Heavy Industry

  Supports continuous operation of critical processes through load sharing.

• Microgrids & Renewable Integration

  Enables synchronized generator operation with renewable or utility systems.

Product Advantages

• Accurate Load Distribution

  Prevents generator overloading and ensures efficient parallel operation.

• Wide Compatibility

  Integrates with both mechanical and electronic governors using analog bias signals.

• Durable Design

  Operates reliably in extreme environmental conditions and industrial settings.

• Low Power Operation

  Consumes minimal current, reducing strain on auxiliary systems.

• Fast Response Time

  Reacts quickly to load fluctuations, minimizing system instability.

• Proven Reliability

  A long-standing industry standard trusted in mission-critical operations worldwide.

Frequently Asked Questions (FAQ)

1. Q: What is the main difference between the 9907-175 and the 9907-175A?

   A: The 9907-175A includes refinements for improved compatibility and performance across a wider range of analog governor systems.

2. Q: What is the typical use case for this module?

   A: It is primarily used in generator sets to evenly distribute load among units operating in parallel.

3. Q: Is it compatible with digital governors?

   A: It is designed for analog systems but may interface with digital controls using analog bias outputs.

4. Q: Does it require software configuration?

   A: No software is required; it uses analog voltage signals and wiring adjustments for configuration.

5. Q: What are the mounting options for the 9907-175A?

   A: It supports both panel mounting and DIN rail installations.

6. Q: How is it powered?

   A: The module operates on 18–32 V DC, typically from a 24 V system.

7. Q: What happens if one generator loses connection with the module?

   A: Load imbalance may occur, and the affected generator will likely default to local control until restored.

8. Q: Is reverse polarity protected?

   A: Yes, it includes reverse polarity protection for safe installation.

9. Q: Can this module work in outdoor environments?

   A: Yes, when installed in a properly enclosed panel; it tolerates –40 °C to +85 °C.

10. Q: Is this model CE and UL certified?

    A: Yes, it complies with CE, UL, and RoHS standards.