9905-995 - 2301A Load Sharing and Speed Control

TECHNICAL SPECIFICATION:

Part Number: 9905-995
Manufacturer: Woodward
Series: 2301A Series
Product Type: Speed Control and Load Sharing Module
Input Voltage: 18�40 VDC (24 VDC nominal)
Speed Range: High range (typically 2000 Hz to 6000 Hz)
Actuator Output: 0�200 mA
Load Sharing: Isochronous and droop modes
Ambient Temperature: -40�C to +70�C
Enclosure: Chassis-mounted (sheet metal)
Availability: In stock

FUNCTIONAL DESCRIPTION:

The 9905-995 is a 2301A series control module designed for the precise management of engines and turbines in power generation and mechanical drive applications. It provides high-performance speed governing and proportional load sharing for prime movers operating in parallel. By monitoring speed via a magnetic pickup (MPU) and load via current and potential transformers, the 9905-995 modulates the fuel actuator to maintain system stability and frequency.

LOAD SHARING AND SPEED GOVERNING:

The Load Sharing and Speed Control supports both Isochronous and Droop control modes. In Isochronous mode, it maintains a constant engine speed regardless of the load, which is critical for isolated power systems. In Droop mode, it allows for speed decreases proportional to the load, enabling the unit to operate effectively in parallel with a utility grid or other generators. The load-sharing capability ensures that all units in a multi-generator system distribute the total kilowatt demand evenly, preventing any single unit from being overloaded.

ADJUSTMENTS AND CALIBRATION:

The Load Sharing and Speed Control features a user-friendly analog interface with front-mounted potentiometers for fine-tuning system performance. Key adjustments include:

• Rated Speed: Defines the target operating frequency (e.g., 50/60 Hz).
• Gain & Stability: Adjusts the PID response to ensure the engine reacts quickly to load changes without hunting.
• Low Idle Speed: Sets the engine speed for warm-up or idling phases.
• Load Gain: Calibrates the load-sharing sensitivity between multiple units.

AVAILABILITY AND SUPPORT:

World of Controls provides the 9905-995 module in both unused and fully refurbished conditions to support the ongoing reliability of your power assets. Each unit is subjected to comprehensive quality control, including simulation of load-sharing loops and actuator output verification. Our technical team is available 24/7 for global support, including field troubleshooting and exchange programs. Contact us today for a quote or technical assistance with your 2301A hardware.

FREQUENTLY ASKED QUESTIONS:

What is the Woodward 9905-995?

It is an analog speed control and load-sharing module for prime movers. It regulates fuel delivery to maintain a constant speed or to share a common electrical load with other generators.

What is the difference between the 9905-995 and other 2301A models?

The 9905-995 is specifically configured for a High-Range frequency input (2000�6000 Hz). Using this module with a low-frequency speed sensor will result in inaccurate governing or a failure to start.

Can I use the Load Sharing and Speed Control with a 12V system?

No. This module is designed for an 18�40 Vdc input (24 Vdc nominal). Operating outside this voltage range can lead to unstable control or hardware damage.

How do I correct hunting or speed oscillation?

Hunting is typically managed by adjusting the Gain and Stability potentiometers. It is recommended to increase the Gain until the system becomes slightly unstable, then back it off until the speed remains steady under load.