Woodward 8406-121 Electronic Governor for Engine Speed Control

Woodward 8406-121 Electronic Governor - Precision Engine Speed Control

The Woodward 8406-121 Electronic Governor represents a proven solution for accurate engine speed regulation across demanding industrial environments. Engineered for reliability in power generation systems, marine propulsion units, and critical process control applications, this governor maintains consistent RPM performance under varying load conditions.

Technical Specifications

• Model Number: 8406-121
• Control Type: Electronic speed governing
• Input Voltage: 24 VDC nominal
• Speed Range: Configurable 300-3600 RPM
• Accuracy: ±0.25% regulation
• Response Time: <100ms to load changes
• Operating Temperature: -40°C to +70°C
• Protection Rating: IP54 environmental sealing
• Mounting: Panel or DIN rail compatible

Application Solutions

Power Generation: Maintains stable frequency output in diesel and gas generator sets, ensuring grid-quality power delivery during parallel operation and load transitions.

Marine Propulsion: Provides smooth throttle response and precise speed holding for main engines and auxiliary power units in commercial vessels.

Industrial Drives: Controls prime movers in pumping stations, compressor packages, and mechanical drive systems requiring constant-speed operation.

Key Performance Features

Advanced PID control algorithms deliver superior load acceptance without overshoot, while integrated droop compensation enables seamless load sharing between multiple engine-generator sets. The governor's solid-state design eliminates mechanical wear points, reducing maintenance intervals and extending service life beyond traditional mechanical governors.

Installation & Integration

Standard 4-20mA output interfaces directly with electronic actuators and fuel control systems. Configurable parameters allow field adjustment of gain, stability, and droop settings without external programming tools. Diagnostic LEDs provide real-time status indication for simplified troubleshooting.

Common Questions

Q: Is this governor compatible with both diesel and gas engines?
A: Yes, the 8406-121 supports diesel, natural gas, and dual-fuel engine configurations through adjustable control parameters.

Q: What actuator types work with this governor?
A: Compatible with proportional electric actuators accepting 4-20mA control signals, including Woodward EPG and third-party units.

Q: Can multiple governors operate in parallel for load sharing?
A: Absolutely. Built-in droop compensation and external synchronization inputs enable stable parallel operation of multiple gensets.

Q: What is the typical calibration procedure?
A: Initial setup requires speed range configuration and gain adjustment per engine characteristics, typically completed in 15-20 minutes using onboard potentiometers.

Warranty & Support

Every Woodward 8406-121 Electronic Governor includes a comprehensive 12-month warranty covering manufacturing defects and component failures. Our technical support team provides application assistance, configuration guidance, and troubleshooting support throughout the product lifecycle.

Related Products

Enhance your control system with complementary Woodward components:

• Woodward 8400-016 EPG Actuator | 24 VDC Electric Governor - Precision electric actuator for fuel control integration
• Woodward 8273-128 Load Sharing & Speed Control | 2301D-ST Module - Advanced load sharing for multi-engine systems
• Woodward 9907-038 SPM-A Synchronizer - Automatic synchronization for paralleling applications

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