WOODWARD 8400-059

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WOODWARD 8400-059

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The Woodward 8400-059 is a specific part number for a ProAct™ Digital Speed Control System. More precisely, it refers to a newer, updated version of an older ProAct Model II Speed Control.

WOODWARD 8400-059: ProAct™ Digital Speed Control System (Model II Update)

The Woodward 8400-059 is a component within the ProAct™ Digital Speed Control System, specifically functioning as a speed controller. It’s designed to provide precise and reliable speed control for various types of prime movers, often in conjunction with a separate ProAct actuator and/or driver.

Product Overview

• Product Type: Digital Speed Control System / Speed Controller
• Manufacturer: Woodward
• Series: ProAct™ Digital Speed Control (associated with ProAct Model II)
• Function: Electronically regulates the speed of an engine or turbine by sending precise commands to an actuator that controls fuel or air.
• Key Feature: This particular part number (8400-059) is identified as a direct replacement or updated version for older 8400-010 ProAct Model II Speed Controls. This suggests it incorporates improvements or addresses obsolescence.
• Integration: It typically works as part of a larger system, interfacing with an actuator (like a ProAct I or II actuator) and potentially an intermediate driver, depending on the specific system architecture.

Detailed Description

The ProAct™ Digital Speed Control Systems are known for their advanced microprocessor-based control, offering high precision, fast response, and robust performance in demanding applications. The 8400-059 continues this legacy by serving as the “brain” of the speed control loop.

Key characteristics and implications of the 8400-059 include:

• Digital Control: Utilizes sophisticated digital algorithms to monitor engine speed (via a magnetic pickup or similar sensor) and calculate the necessary control signal to achieve and maintain a desired speed setpoint.
• Precise Speed Regulation: Essential for applications requiring very stable speed, such as generator sets maintaining a constant electrical frequency, or pumps and compressors operating at specific flow rates.
• Replacement Part: Its designation as an update/replacement for the 8400-010 indicates a focus on maintaining compatibility while potentially offering improved internal components, reliability, or updated software features.
• System Integration: It typically outputs an electrical signal (e.g., PWM, analog voltage, or current) to a compatible Woodward ProAct actuator. The actuator then mechanically adjusts the fuel rack, throttle, or other control linkage on the prime mover. Some setups may involve a “ProAct Driver” between the controller and the actuator to provide necessary power or signal conversion.
• Programmability: ProAct controllers are generally configurable via Woodward’s PC-based service tools, allowing users to tune PID parameters, set speed points, configure alarms, and customize control logic for specific engine characteristics and operational requirements.
• Reliability: Designed for continuous operation in harsh industrial environments, offering high availability for critical equipment.
• 

Applications

The Woodward 8400-059 (and the ProAct Model II system it belongs to) is commonly used in:

• Power Generation: For speed and load control of diesel or gaseous engine-driven generator sets, ensuring stable electrical frequency and efficient power production.
• Industrial Engine Control: For a wide range of industrial engines driving pumps, compressors, fans, or other machinery where precise speed regulation is required.
• Marine Propulsion: In some marine applications for engine speed control.
• Cogeneration Systems: Where engine performance is critical for both power generation and heat recovery.

Related Products/Series

The Woodward 8400-series broadly covers ProAct™ Digital Controls. Other related part numbers and components in the ProAct ecosystem include:

• 8400-010: The older ProAct Model II Speed Control that the 8400-059 replaces.
• 8400-015: ProAct mA Control (0–200 mA Actuator Output), a different control variant.
• 8400-055: ProAct Fuel Limit.
• 8400-061: Another ProAct Fuel Limit variant.
• 9905-463: ProAct Model II Speed (an older model number for the same family).
• ProAct Actuators: Such as ProAct I or ProAct II actuators, which receive commands from the speed controller.
• ProAct Drivers: Intermediate modules used in some applications to interface between the controller and the actuator.