WOODWARD 9905-373 | 2301A Load Sharing

Description

• The WOODWARD 9905-373 is a core component of the 2301A series, specifically designed for managing load sharing and speed control in engines and turbines. This module is a low-voltage variant that provides proportional and integral control for high-speed response to changes in engine load. It is widely recognized for its reliability in diesel and gas engine applications, offering precise frequency control and seamless synchronization capabilities for generators. Built to endure the vibration and temperature extremes of engine rooms, this unit remains a standard for analog-based industrial governors.
  

  Technical Specifications (Datasheet)

  Model Number: 9905-373 Manufacturer: Woodward Series: 2301A Load Sharing and Speed Control Input Voltage: 18–40 VDC Speed Range: 500 Hz to 25,000 Hz (Signal from Magnetic Pickup) Power Consumption: 5 Watts (Maximum) Output Signal: 0–160 mA or 0–200 mA (to Actuator) Dimensions: 21.0 cm x 18.0 cm x 5.5 cm Weight: 1.22 kg Country of Origin: USA

  Application Fields

  This speed control module is essential for precise power management in the following areas:

  • Standby Power Generation: Providing rapid speed recovery for emergency backup generators during sudden load changes.
  • Parallel Generator Sets: Facilitating proportional load sharing between multiple engines connected to a common bus.
  • Marine Power Systems: Regulating auxiliary engines and generators on commercial and military vessels.
  • Industrial Engine Drives: Controlling speed for mechanical drives in pumps, fans, and compressors within factories.

  Product Usage Instructions

  1. Mounting: Secure the 9905-373 in a control cabinet close to the engine, ensuring it is protected from direct fuel spray and excessive heat.
  2. Magnetic Pickup (MPU) Installation: Connect the speed sensor to the designated terminals. Ensure the MPU is adjusted to provide a strong AC signal (at least 1.5 Vrms) during cranking.
  3. Actuator Connection: Wire the output to your Woodward actuator. Use shielded cables to prevent electrical noise from causing “hunting” or speed instability.
  4. Adjustment and Calibration: Use the onboard potentiometers to adjust “Gain,” “Stability,” and “Rated Speed.” Fine-tune these settings while the engine is running to achieve a stable idle and smooth transition to rated RPM.
  5. Load Sharing Setup: For parallel operation, connect the load-sharing lines between all 2301A units in the system. Calibrate the “Load Gain” to ensure each generator carries its fair share of the total electrical load.

  Frequently Asked Questions (Q&A)

  Q: What is the difference between this model and the High Voltage version? A: The 9905-373 operates on 18–40 VDC, whereas high-voltage versions are designed for 115 or 230 VAC/VDC power sources. Always verify your supply voltage before installation.

  Q: Why is my engine surging or hunting? A: This is often caused by incorrect “Gain” or “Stability” settings. Slowly turn the “Stability” potentiometer clockwise until the engine settles. If it persists, check for loose linkage or electrical interference on the MPU lines.

  Q: Can this module be used with a 12V battery system? A: No, the 9905-373 requires a minimum of 18 VDC. It is specifically designed for standard 24V industrial battery systems.

  Q: Where can I find more technical support or purchase this unit? A: You can find additional technical data and inventory status for the WOODWARD 9905-373 by visiting https://www.newplcdcs.com for expert industrial parts sourcing.

  Similar Model Recommendations

  If you are maintaining or upgrading a 2301A or MicroNet system, these related Woodward parts may be compatible:

  1. WOODWARD 9905-001
  2. WOODWARD 9907-018
  3. WOODWARD 9907-164
  4. WOODWARD 8273-501
  5. WOODWARD 8200-1302
  6. WOODWARD 5466-316
  7. WOODWARD 5501-380
  8. WOODWARD 8406-114
  9. WOODWARD 5464-832
  10. WOODWARD 5462-758