Description
The Woodward 8440-1706 (model designation SPM-D11/LSXR) is a microprocessor-based digital synchronizer and load-sharing controller manufactured by Woodward, Inc. It is designed for use on one- or three-phase AC generators to automate synchronization, breaker control, power factor regulation, and active/reactive power management.
Technical Specifications
| Parameter | Value |
| Manufacturer | Woodward, Inc. |
| Product Series | SPM-D11 / LSXR Series |
| Part Number (MPN) | 8440-1706 |
| Power Supply | 12 / 24 VDC nominal power supply |
| Voltage Measuring Inputs | 2-phase generator and 2-phase busbar voltage display/measuring (100 VAC nominal) |
| Current Measuring Inputs | 1-phase generator current (../5 A format) |
| Display & Diagnostics | Integrated 2-line liquid crystal display (LCD) for operational parameters, synchroscope, and alarm indications |
| Dimensions | 144 mm × 72 mm × 122 mm |
| Approximate Weight | ~800 g (1.76 lbs) |
| Enclosure Protection | IP20 standard (panel-mounted device) |
Key Features & Functionality
- Automatic Synchronization: Supports phase matching or slip frequency synchronization alongside automatic voltage matching via analog or discrete output bias signals.
- Modes of Operation: Features selectable operating modes (such as Run, Check, Permissive, and OFF) with synchronization time monitoring and synchro-check capabilities.
- Load & Power Factor Control: Provides true RMS power calculation, real power control, soft unload features, and configurable power factor setpoints for parallel mains operation.
- System Security: Multi-level password protection for configuration parameters, which can be modified directly on the unit or via a connected PC software utility.
Supply Terms & Commercial Details
- Availability: Widely available across industrial automation surplus suppliers, specialized turbine control distributors, and secondary market channels.
- Lead Time: In-stock hardware typically ships within 1 to 3 business days.
- Warranty: Standard industrial surplus or reconditioned warranties vary by distributor (typically ranging from 1 to 3 years).
- Condition: Available as New Surplus, Factory Reconditioned, or Fully Tested Working Hardware.
- Pricing Note: Pricing is subject to market availability and obsolescence; contact an authorized automation distributor for a formal quotation.
Engineering & Integration Guidance
- Wiring and Isolation: Ensure measuring inputs (100 VAC / ../5 A) are properly isolated and fused according to local safety codes before tying them into busbar and generator potentials.
- Parameter Configuration: Utilize Woodward’s configuration software tool for precise parameter scaling (such as CT/PT ratios and control loops) prior to commissioning the generator breaker.
- Handling Precautions: Observe standard electrostatic discharge (ESD) precautions when accessing rear terminals or configuring communication ports.
Frequently Asked Questions
What applications use the Woodward 8440-1706?
It is deployed in emergency standby diesel generators, marine power generation switchboards, and industrial co-generation plants requiring synchronized parallel operation and load sharing.
Can the module handle dead bus closing?
Yes, the SPM-D11 series includes features designed for isolated operation control and dead bus operation handling.
How are parameters modified on the unit?
Parameters can be adjusted directly using the front-panel interface and multi-level password protection, or remotely configured via a PC interface.
