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Phone: +86 16626708626Description
3. Key Technical Specifications
The Woodward 8290-191 EPG unit processes engine speed signals from a Magnetic Pickup Unit (MPU) and drives a high-speed rotary electric actuator to regulate fuel delivery.
| Parameter | Value |
|---|---|
| Part Number | 8290-191 |
| Manufacturer | Woodward, Inc. |
| Product Line | Electrak EPG Speed Controls |
| Operating Voltage | 24 VDC Nominal (18 to 32 VDC range) |
| Mode of Operation | Isochronous (Zero droop speed regulation) |
| Operating Frequency Range | High Frequency Range: 3,000 Hz to 6,000 Hz (from MPU) |
| Actuator Compatibility | Designed to drive Woodward Model 512/1712 or Model 524/1724 EPG Actuators |
| Adjustable Parameters | Gain, Stability, Rated Speed, Start Fuel Limit |
| Ambient Temperature | -40°C to +75°C (-40°F to +167°F) |
4. Product Introduction & Supply Chain Strategy
The Woodward 8290-191 EPG controller delivers precise speed governing for engines driving generator sets, pumps, and compressors. Because EPG systems are entirely electric, they do not rely on engine oil pressure, allowing rapid throttle positioning during starting and transient load changes.
Holding an uninstalled Woodward 8290-191 in reserve as New Surplus is a crucial risk-mitigation step for power system operators. Speed governor degradation can cause unstable engine hunting, frequency drift, or failed generator synchronization during power outages. Staging a factory-sealed unit ensures unaged internal capacitors, pristine terminal strip connections, and immediate drop-in replacement without panel modification.
8290-191
8290-191
5. Installation & Configuration Guide
Engine Overspeed Protection Safety Warning
An overspeeding engine can cause catastrophic machinery destruction or personal injury. The 8290-191 speed control is not an overspeed shutdown device. An independent mechanical or electrical overspeed shutoff device MUST be installed and verified operational before powering the system.
1
Power Isolation & Engine Shutdown
Prerequisite
1.Power Isolation & Engine Shutdown:Prerequisite.
Shut down the prime mover, lock out starting battery circuits, and isolate 24 VDC power feeds to the engine control panel.
2
Enclosure Panel Installation
Mechanical Mounting
2.Enclosure Panel Installation:Mechanical Mounting.
Mount the 8290-191 metal enclosure vertically inside a low-vibration control panel, ensuring adequate airflow around the heat sink fins.
3
Landing Power, MPU, & Actuator Cables
Wiring Setup
3.Landing Power, MPU, & Actuator Cables:Wiring Setup.
Connect 24 VDC battery leads (terminals 1 & 2), actuator wires (terminals 3 & 4), and shielded MPU wires (terminals 5 & 6). Ground the MPU cable shield at the controller chassis end only.
4
Potentiometer Setup & Dynamic Tuning
Commissioning
4.Potentiometer Setup & Dynamic Tuning:Commissioning.
Set Gain and Stability potentiometers to mid-position. Crank the engine, adjust the Rated Speed trim potentiometer to rated frequency (e.g., 50 Hz / 60 Hz), and fine-tune Gain and Stability for stable transient load response.
6. Firmware/Software Versions & Upgrade Notes
- Documentation Reference: Refer to Woodward Manual 82382 (or product spec 82380) for full wiring schematics, MPU frequency calculation formulas, and potentiometer adjustment procedures.
- Pure Analog Design: The 8290-191 uses robust analog control circuitry, eliminating the need for firmware uploads, software programming tools, or digital communication cards.
- Actuator Matching: Ensure the 24V controller model matches the coil voltage rating of the connected EPG actuator unit.
7. Frequently Asked Questions (FAQ)
Q: Is this Woodward 8290-191 controller genuinely new? A: Yes, this item is a Brand New Surplus unit. It has never been installed on an engine panel or wired to active field actuators, and is preserved in protective OEM packaging.
Q: What frequency range does the 8290-191 speed control cover? A: The 8290-191 is designed for high-frequency magnetic pickup inputs ranging from 3,000 Hz to 6,000 Hz at rated operating speed.
Q: What is the main benefit of an all-electric EPG system? A: It eliminates hydraulic drive plumbing, pumps, and oil supply lines, allowing rapid installation and instant actuator response even during cold ambient start conditions.
Q: What warranty accompanies this unit? A: Every Woodward 8290-191 speed control unit comes with a full 1-year replacement warranty and a certified quality inspection report prior to shipment.
