Description

Is your generator set struggling with stability or load oscillations when operating in parallel with the main utility grid? In critical power generation networks, maintaining precise speed and proportional load sharing is the only way to prevent cross-currents from tripping your circuit breakers. The Woodward 9907-028 is a 2301A series load sharing and speed control unit engineered for electric governing systems. It manages prime movers—such as diesel engines, gas engines, or steam turbines—by driving a proportional hydraulic or electrical actuator based on real-time magnetic pickup signals.

Procurement managers dealing with plant maintenance schedules cannot afford extended factory lead times for these vital legacy control blocks. We maintain physical inventory of this specific Woodward model to eliminate your system instability and keep your power generation lines online.

Availability, Lead Time, and Warranty

• Condition: New Original (New Surplus / Factory Sealed)
• Availability: In Stock / Ready for Immediate Allocation
• Dispatch Lead Time: Ships within 24 to 48 hours via top-tier international express networks (DHL, FedEx, UPS)
• Warranty Period: 12-Month Warranty from the date of dispatch
• Pricing Note: The listed online price is a baseline market reference point. Real-time acquisition costs vary depending on remaining global stock levels and project volume. Contact our international trade desk directly for a formal, binding price quote.

Technical Specifications and System Integration

In field deployments of Woodward engine management systems, the 2301A architecture is valued for its complete hardware-based ruggedness. Because it relies on discrete analog potentiometers rather than complex digital menus, it remains highly immune to micro-processor lockups and electromagnetic interference (EMI) inside the generator doghouse.

The table below outlines the core hardware parameters and electrical properties verified against official Woodward technical manuals.

Well, technically the control unit manages both speed and real-power load sharing, but only if you provide it with balanced 3-phase potential transformer (PT) and current transformer (CT) sensing inputs from the generator line. Do not expect accurate power calculations if you miswire the phase orientation or omit the CT loops.

9907-028 Commissioning Notes and Field Engineering Insights

During a recent black-start commissioning sequence at a processing plant, the electrical crew ran into a severe engine hunting issue immediately after the governor took over idle control. The engine would surge up and down by 150 RPM. A quick verification of the physical 9907-028 terminal layout revealed the issue: the field technicians had run the unshielded magnetic pickup (MPU) wires inside the same conduit bundle as the 200 mA actuator line, introducing inductive noise into the frequency input path.

• MPU Cable Shielding: Always route the speed sensing MPU lines using twisted-shielded pairs. Terminate the shield braid only at the designated control chassis terminal—never ground both ends, as this forms a ground loop that masks the zero-crossing signal of the pickup sensor.
• Potentiometer Adjustments: When tuning the dynamic response, adjust the GAIN and RESET potentiometers in small increments (no more than 1/8th turn at a time). Let the engine stabilize for 30 seconds after each adjustment before testing transient load rejections.
• Actuator Impedance Match: This module puts out a 0–200 mA current loop designed for standard Woodward actuators (such as the EG-3P or DYNA series). Verify that the total actuator coil resistance matches the module rating; adding excessive external resistance will cause the internal driver transistors to overheat and trip.

Global Logistics and Customs Compliance Optimization

Moving specialized power generation controls through international logistics channels demands strict paperwork verification to eliminate border friction or import holds at the port of entry. Our logistics desk coordinates every aspect of the global shipment.

Logistics Advisory: The 9907-028 features sensitive analog trimmer pots and internal power resistors. To safeguard against the heavy vibrations encountered during air transit, each unit is packed in static-dissipative material and nestled inside heavy, form-fitting closed-cell foam padding.

• Export Classifications: This module is classified under standard industrial control and governor regulations. We perform comprehensive Export Control Classification Number (ECCN) verification and global sanctions checks before dispatch.
• Incoterms Options: Our standard operational terms are EXW (Ex Works) or FCA (Free Carrier). For contract enterprise purchasing, we also manage CIP (Carriage and Insurance Paid to) and DAP (Delivered at Place) logistics chains.
• Customs Documentation: Every international consignment leaves our hub accompanied by a clean commercial invoice carrying the correct Harmonized System (HS) codes, an itemized packing list, and country-of-origin declarations.

Common Procurement Questions

Does the 9907-028 come with a built-in digital display or software configuration kit?

No. The 2301A series is an entirely analog control system. All calibration, from setting the rated speed to adjustments for droop and stability, is performed manually via front-facing screw potentiometers using a standard tuning screwdriver.

Can I replace a 9907-028 with a 9907-018 module directly?

Not without verifying your power supply and speed range codes. Woodward utilizes different suffix numbers under the 2301A umbrella to indicate 115V/230V AC input power variations or distinct MPU speed-sensing frequency limits. Mixing up these configurations will cause immediate equipment damage or a failure to boot. Check your master system schematics before attempting a substitution.

How do you handle import customs duties for deliveries outside North America and Europe?

Under standard FCA or DAP agreements, the buyer is listed as the importer of record and covers local customs taxes, VAT, and administrative entry fees. Our trade specialists eliminate processing delays by building clean, structured commercial documentation that aligns precisely with your country’s customs regulations.