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Phone: +86 16626708626Description
The Woodward 9907-838 is a Load Sharing Module (LSM) designed to optimize load distribution in industrial generator systems. It supports both isochronous and droop load sharing modes, enabling precise load balancing when multiple generators operate in parallel. Widely used in power plants and large industrial settings, this module ensures efficient power sharing and smooth operation across multiple generating units.
The 9907-838 module accepts 3-phase potential transformer (PT) inputs ranging from 95 to 130 VAC and provides an analog output of +0.5 to +4.5 V DC for speed control. It is compatible with Woodward SPM-A synchronizers for synchronization input, supporting enhanced coordination between generators. The module is designed to operate reliably in challenging environments with an operating temperature range from -40°C to +70°C and shock resistance up to 40 G with an 11 ms sawtooth pulse.
- 9907-838
Key specifications:
| Parameter | Value |
|---|---|
| Model | 9907-838 |
| Brand | Woodward |
| Product Type | Load Sharing Module (LSM) |
| Power Supply | 18-32 V DC |
| PT Inputs | 3-phase, 95-130 VAC |
| Output | +0.5 to +4.5 V DC analog |
| Sync Input | Compatible with Woodward SPM-A synchronizer |
| Operating Temperature | -40°C to +70°C |
| Shock Resistance | 40 G, 11 ms sawtooth pulse |
| Dimensions (LxWxH) | 273.6 mm x 214.1 mm x 59.2 mm |
| Weight | Approximately 1.4 kg |
| Certifications | CE, UL/cUL |
The 9907-838 enhances generator system performance by ensuring equal load distribution with isochronous sharing and reducing load automatically using droop control. It is compact, easy to install, and built to withstand harsh industrial environments.
Related modules include other Woodward load sharing systems and synchronizer products like the 9907-175 (obsolete, replaced by the 9907-838), and the SPM-A synchronizer, which works directly with the 9907-838 to provide generator synchronization.
Installation should ensure proper wiring of PT inputs, synchronization connections, and output to the generator speed control input, with attention to grounding and shielding to maintain signal integrity. Routine maintenance involves verifying the load sharing signal, inspecting electrical connections, and monitoring operational parameters for optimal load distribution performance.
