Description
The Woodward 2301A Model 9905-031 is a reverse-acting, high-voltage electronic load-sharing and speed control unit engineered for industrial prime movers such as diesel engines, gas engines, and turbines. Designed to provide precise speed governance and isochronous load sharing across parallel generator sets, this high-voltage controller ensures stable frequency performance and reliable power distribution under varying load demands in industrial applications. In this reverse-acting configuration, fuel output decreases as the control voltage increases, ensuring precise performance matching specific prime mover actuator requirements.
⚙️ Product Datasheet & Technical Parameters
• Brand: Woodward (2301A Series)
• Model Number: 9905-031
• Series: 2301A Load Sharing and Speed Control Series
• Product Name: Reverse-Acting High-Voltage Speed and Load Control Unit
• Origin: United States
• Production Status: Active / Industrial Standard
• Dimensions: Standard Sheet-Metal Chassis Panel Mount Configuration
• Weight: Approximately 1.4 kg
• Country of Origin: United States
• Power Consumption: High-Voltage DC (Nominal)
🔌 Operating Guidelines and Usage Methods
The 9905-031 is designed for panel integration within generator control cabinets or switchgear enclosures. Proper installation requires shielding and grounding all signal wiring, including magnetic pickup (MPU) speed sensor inputs and low-level load-sharing interconnects, to prevent electrical noise and electromagnetic interference from disrupting control stability. Operators configure control action (reverse-acting), gain, reset, speed range, and high-voltage parameters using internal switches and front-accessible potentiometers during initial setup. Ensure that synchronization and tie-line interlocks are thoroughly tested before engaging automatic generator loading and parallel tie lines.
🔄 Power-On and Power-Off Sequence
Power-On Sequence: First, verify all external wiring, actuator connections, MPU sensor lines, and parallel tie-line cabling. Next, energize the primary high-voltage power supply to the unit. Allow internal circuits to stabilize and verify that operational status indicators show normal health. Once control readiness is confirmed, release the prime mover to start up, allowing it to accelerate smoothly from cranking speed to rated operational frequency under governor command.
Power-Off Sequence: First, safely transfer active electrical load away from the generator unit or open parallel tie breakers to prevent sudden load dumps on remaining systems. Next, command the prime mover to decelerate and shut down the fuel supply valves. Finally, cut off the high-voltage operating power supply to the 2301A controller.
📝 Product Description and Operation Manual
The unit operates by continuously processing frequency input signals from a magnetic speed sensor, comparing them against internal frequency references to modulate the actuator output under a high-voltage design. In parallel operation, it utilizes an isolated load-sharing circuit that communicates via analog lines to divide active power equally among generators. Because it features a reverse-acting high-voltage configuration, it adapts cleanly to specific actuator feedback requirements. Front-accessible adjustments allow fine-tuning of speed trim, reset stability, and dynamic gain to match specific engine characteristics and ensure seamless governor response.
💡 Frequently Asked Questions (Q&A)
Q: What is the significance of the high-voltage design in the 9905-031?
A: The high-voltage capability allows the unit to interface directly with specific plant power infrastructures and specialized actuator control circuits requiring higher voltage inputs.
Q: How does the reverse-acting feature affect control behavior?
A: In reverse-acting units, fuel delivery decreases as the control signal voltage increases, requiring proper matching with the specific actuator type.
Q: Are load-sharing interconnects sensitive to electrical noise?
A: Yes, load-sharing lines carry low-level analog signals and must be shielded and grounded properly to prevent load swings or instability between parallel generators.
Q: Can this unit operate on standalone generator sets?
A: Yes, while optimized for isochronous load sharing in parallel systems, it can also function effectively on single generator applications using droop or isochronous control.
🚀 Recommended Woodward 2301A Series Models
- 9900-430
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