WOODWARD 9905-090 | 2301A Load Sharing and Speed Control Module

Description

• The WOODWARD 9905-090 is a precise analog control module from the established 2301A series, designed for speed governing and load sharing applications in industrial engines and turbines. This module provides proportional and integral control logic, ensuring rapid frequency correction and stable speed management under varying mechanical loads. It is engineered for heavy-duty environments, offering exceptional reliability for generator sets operating independently or in parallel configurations.
  

  Technical Specifications (Datasheet)

  Model Number: 9905-090 Manufacturer: Woodward Series: 2301A Control Series Input Voltage: 115 / 230 VAC (High Voltage Version) Speed Input Signal: 1.0 to 30 Vrms from Magnetic Pickup (MPU) Speed Range: 500 Hz to 25,000 Hz Actuator Output Current: 0–160 mA / 0–200 mA Dimensions: 21.0 cm x 18.0 cm x 5.5 cm Weight: 1.30 kg Country of Origin: USA

  Application Fields

  This high-voltage control module is widely deployed to manage prime movers in critical power and industrial applications:

  • Prime Power Plants: Governing large diesel and gas engines running baseload electricity.
  • Parallel Generator Stations: Coordinating load sharing lines between multiple generator sets connected to a single bus.
  • Emergency Infrastructure: Ensuring immediate speed recovery and grid synchronization for hospital and data center backup power.
  • Mechanical Marine Systems: Controlling speed and load balancing for auxiliary engines on transport and cargo ships.

  Product Usage Instructions

  1. Chassis Placement: Mount the module within a secure, clean control cabinet. Ensure adequate space around the unit for natural convection cooling to prevent heat buildup.
  2. Power Connection: Confirm your local supply matches the high-voltage specifications (115 or 230 VAC) before terminating power lines to prevent damage to internal transformers.
  3. Speed Sensor Setup: Wire the Magnetic Pickup (MPU) using shielded, twisted-pair cables. Ground the shield exclusively at the governor terminal to block electromagnetic noise.
  4. Actuator Tuning: Connect the output to the governor actuator. Turn the onboard potentiometers to adjust “Gain” and “Stability” while monitoring engine behavior to remove hunting or lazy response curves.
  5. Load Share Linking: For parallel setups, connect the load-sharing lines directly between all matching 2301A units and calibrate the “Load Gain” to equalize kW distribution across the system.

  Frequently Asked Questions (Q&A)

  Q: How does the 9905-090 differ from low-voltage 2301A models? A: The 9905-090 is built with an AC transformer to accept 115 VAC or 230 VAC input power, whereas low-voltage variants (like the 9905-373) operate strictly on 18–40 VDC battery systems.

  Q: What is the indicator of an unstable speed loop? A: Continuous speed oscillations, often called “hunting,” indicate that the Gain is set too high or the Stability potentiometer needs clockwise adjustment to dampen the control loop.

  Q: Can this module handle reverse power protection? A: No. The 2301A manages speed and proportional load sharing. Protective functions like reverse power, overcurrent, or under-voltage require separate safety relays.

  Q: Where can I check stock status or find manuals for this hardware? A: To view active inventory, pricing, and specific configuration options for the WOODWARD 9905-090, you can visit https://www.newplcdcs.com for complete B2B industrial catalog access.

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