Description
The Woodward 2301A Model 9905-023 is a reverse-acting, low-voltage electronic load-sharing and speed control unit engineered for industrial prime movers. Designed to provide precise isochronous load sharing and speed governance across parallel generator sets, this controller features a 0-400 mA actuator current output. In this reverse-acting configuration, fuel output decreases as the control voltage increases, ensuring precise performance matching specific prime mover actuator requirements in demanding industrial applications.
⚙️ Product Datasheet & Technical Parameters
• Brand: Woodward (2301A Series)
• Model Number: 9905-023
• Series: 2301A Load Sharing and Speed Control
• Product Name: Reverse-Acting Low-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: Low-Voltage DC (Nominal)
🔌 Operating Guidelines and Usage Methods
The 9905-023 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. Operators configure control action (reverse-acting), gain, reset, and speed range parameters using internal switches and front-accessible potentiometers. 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 low-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 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 a 0-400 mA actuator output current. 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 low-voltage design, it adapts cleanly to specific actuator feedback and control characteristics. Front-accessible adjustments allow fine-tuning of speed trim, reset stability, and dynamic gain.
💡 Frequently Asked Questions (Q&A)
Q: What is the significance of the 0-400 mA actuator current output?
A: It defines the current range supplied to the matching actuator to modulate fuel or steam delivery in proportion to the control demand.
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
- 9900-431
- 9900-432
- 9905-020
- 9905-021
- 9905-025
- 9905-029
- 9905-031
- 9903-327
- 9907-018
