WOODWARD 9907-147 – 2301A Load Sharing & Speed Control for Engines and Generator Sets

The WOODWARD 9907-147 is part of the proven 2301A family—an analog speed and load sharing controller used on diesel and gas engines to stabilize speed, manage droop/isochronous operation, and share load when generators run in parallel. From my experience, it’s the go-to choice when you want rock-solid governing without the complexity of a full digital system. You might notice that commissioning is straightforward: MPU pickup for speed sensing, a 4–20 mA or voltage speed reference, and a robust 0–200 mA actuator drive to your Woodward or third‑party electric actuator.

Typical applications include power generation (prime and standby), marine propulsion and auxiliaries, oil & gas pumps and compressors, and industrial engines where dependable, repeatable speed control is a must. Many maintenance teams favor the 2301A series because adjustments are tactile and predictable—gain, stability, and droop knobs let you tune response in minutes.

Order Placement Process and Our Guarantees

• Warranty: 365 days.
• Lead time: In-stock usually ships within 1 week; no more than one month at the latest.
• Payment: 50% advance payment; full payment prior to delivery.
• Shipping: Express via FedEx, UPS, or DHL.

One thing I appreciate is how predictable the logistics are for this model—packaging is compact, and documentation is clear, so it moves quickly through most customs processes.

Key Features

• Stable Speed Governing: Isochronous or droop modes for steady frequency control on gensets and prime movers.
• Load Sharing Capability: Analog load share line lets multiple units carry proportional load during parallel operation.
• Wide Actuator Drive: Typically 0–200 mA actuator output for Woodward electric actuators and many compatible types.
• Flexible Speed Reference: Accepts MPU speed pickup and a remote 4–20 mA or voltage speed setting signal.
• Rugged Industrial Design: Built for tough environments; reliable over a wide ambient temperature range.
• Fast Commissioning: Intuitive front‑panel adjustments (gain/stability/droop) reduce on‑site tuning time.
• No Fieldbus Required: Pure analog and discrete I/O—ideal where simplicity and serviceability are priorities.

Technical Specifications

Note: Exact I/O scaling and actuator current specifications can vary by 2301A variant; 9907‑147 follows the standard 2301A load sharing format. If you’re matching an existing installation, share a photo of the nameplate and we’ll verify pinout and settings before shipment.

Application Fields

• Generator sets running in island or parallel with other gensets for load sharing and frequency stability.
• Marine propulsion and auxiliary engines where simple, dependable speed governing is preferred.
• Oil & gas compressors and large pumps requiring droop control to coordinate multiple driven units.
• Industrial engines in plants and utilities where analog tuning and quick service access are valued.

A maintenance supervisor told us their team swapped to the 2301A after frequent nuisance trips on a digital controller—“Once we dialed in gain and stability, the hunting disappeared and our parallel set held load within a couple of kilowatts.” That seems to be a common experience in retrofit scenarios.

Advantages & Value

• Reliability: Long-running 2301A platform with predictable behavior and minimal downtime.
• Compatibility: Works with standard MPU pickups and common electric actuators; easy to integrate with existing cabinets.
• Cost Control: Lower total cost than many digital governors; less training and faster commissioning.
• Technical Support: Parameter guidance and pre‑shipment checks so your on‑site tuning is smoother.

Installation & Maintenance

• Cabinet & Mounting: Install in a ventilated control cabinet (typically IP54 or better). Keep high‑voltage lines separated from signal wiring.
• Power & Grounding: Use a clean 24 VDC supply with proper grounding. In many cases, adding a dedicated supply filter improves noise immunity.
• Wiring Practices: Shielded twisted pair for MPU and speed reference lines; terminate shields at a single point ground.
• Tuning: Start with conservative gain/stability; bring the engine to rated speed and fine‑tune to remove hunting and overshoot.
• Routine Checks: Periodically verify droop, isochronous stability, and actuator linkage. Light dust cleaning and terminal retightening typically once per year.
• Spare Strategy: Keep a spare MPU and actuator on hand; pairing them with the 9907‑147 minimizes recovery time.

Quality & Certifications

• CE compliant; UL/cUL recognition commonly available for the 2301A family.
• RoHS alignment on many current-production units.
• Manufacturer build quality known for long service life in harsh environments.
• Seller warranty: 365 days. Support for replacement or repair according to inspection results.

Helpful Companion Components

• WOODWARD electric actuators (e.g., EG series) matched to the 0–200 mA drive.
• MPU speed sensors for flywheel pickup to ensure clean speed feedback.
• WOODWARD SPM-A synchronizer for seamless paralleling with existing switchgear.

If you’re replacing a legacy governor one-to-one, send the actuator model and your current speed reference scheme—typically we can pre‑confirm the 9907‑147 settings so commissioning is almost plug‑and‑play.