Description
The Woodward 9907-252 is a microprocessor-based Load Sharing Module manufactured by Woodward, Inc. It is engineered for industrial power generation applications, designed to provide precise active power (kW) load sharing and speed control coordination for engine-generator sets operating in parallel or in isolation from a utility grid.
Technical Specifications
| Parameter | Value |
| Manufacturer | Woodward, Inc. |
| Product Type | Load Sharing Module |
| Part Number (MPN) | 9907-252 |
| Input Power Supply | 18 to 32 VDC nominal |
| Potential Transformer (PT) Inputs | 3-Phase, 100 to 240 VAC |
| Control Output Type | 0.5 to 4.5 VDC (or auxiliary governor interface signal) |
| Dimensions | Approx. 273.6 mm × 59.2 mm × depth variant |
| Operating Temperature | -40 to +70 °C (-40 to +158 °F) |
| Enclosure Protection | IP20 standard (intended for internal mounting within an enclosed switchgear cabinet or control panel) |
Supply Terms & Commercial Details
- Availability: Sourced through specialized industrial automation surplus, power generation control distributors, and legacy hardware providers.
- Lead Time: In-stock hardware typically ships within 1 to 3 business days.
- Warranty: 12-month standard supplier replacement or repair warranty covering functional hardware defects.
- Condition: New Surplus, Factory Open Box, or Fully Tested Refurbished (verify specific packaging and calibration test logs with your vendor prior to purchase).
- Pricing Note: Price subject to market conditions; contact us for a firm quote.
Engineering & Integration Guidance
When installing or servicing the 9907-152/252 load sharing unit within a generator control switchgear panel, observe the following parameters:
- Potential Transformer (PT) Phasing: Ensure correct phase matching and voltage scaling for the 3-phase AC inputs (100–240 VAC) to guarantee accurate real power (kW) calculation and proportional load distribution.
- Interconnect Wiring: Shielded twisted-pair cabling should be used for the load-sharing analog tie lines between parallel generator sets to prevent circulating currents or reactive/active hunting caused by electrical noise.
- Power Supply Stability: Feed the module with a clean, isolated 18–32 VDC source separate from high-inductive switching loads to maintain stable governor actuation signals.
- Electrostatic Discharge (ESD) Handling: Wear a grounded wrist strap and handle the hardware by its outer edges or faceplate to protect internal electronics during installation.
Frequently Asked Questions
What system applications use the Woodward 9907-252?
This module is deployed primarily in diesel or gas engine generator control panels where multiple units run in parallel and must share active electrical load evenly.
Can this module operate as a standalone synchronizer?
The 9907-252 focuses primarily on load sharing and active power management loops; synchronizing functions are often handled by companion modules or integrated digital governor units within the switchgear setup.
How are adjustments made on the unit?
Calibration and tuning parameters (such as gain, stability, and droop settings) are typically adjusted via onboard potentiometers or configuration software depending on the specific system generation layout.
