Description
The Woodward 2301A Model 9907-250 is an advanced electronic load-sharing and speed control module engineered for industrial prime movers such as diesel engines, gas engines, and turbines. Designed to provide precise speed governance and automatic isochronous load sharing across parallel generator sets, this model ensures stable frequency performance, reliable power distribution, and seamless operational synchronization under varying load demands in industrial applications.
⚙️ Product Datasheet & Technical Parameters
• Brand: Woodward (2301A Series)
• Model Number: 9907-250
• Series: 2301A Load Sharing and Speed Control Series
• Product Name: Electronic Load Sharing and Speed Control Module
• 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: 24 VDC (Nominal)
🔌 Operating Guidelines and Usage Methods
The 9907-250 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 gain, reset, speed range, and control parameters using internal switches and front-accessible potentiometers during initial commissioning. 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 24 VDC 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 the actuator output and regulate fuel or steam delivery. In parallel operation, it utilizes an isolated load-sharing circuit that communicates via analog lines to divide active power equally among generators. 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 primary function of the isochronous load-sharing feature?
A: Isochronous load sharing allows multiple generators operating in parallel to share active electrical load equally while maintaining a constant system frequency without droop.
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: Are configuration settings preserved during a power loss?
A: Yes, internal configuration switches and adjustments maintain their physical settings when power is removed, though system operating parameters reset upon re-energization.
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.
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