Description
The Woodward 8440-1666 is a microprocessor-based digital synchronizer and load-sharing unit belonging to the SPM-D series. In field deployments across prime power generation and emergency standby systems, this module automates generator synchronization, breaker control, active power load sharing, and reactive power management for single or multi-engine paralleling applications.
Technical Specifications
Parameter Value Manufacturer Woodward, Inc. Product Series SPM-D Series Digital Synchronizer Part Number 8440-1666 Operating Voltage 12 / 24 VDC nominal (9 to 32 VDC operational range) Voltage Inputs Generator and busbar voltage sensing (100 VAC nominal, up to 690 VAC via external PTs) Current Inputs 1-phase or 3-phase generator current sensing (../1 A or ../5 A secondary CT inputs) Discrete I/O Configurable digital inputs and relay outputs for breaker command and status tracking Communication Interface RS-485 / CAN bus interface for remote monitoring and PC configuration Enclosure Protection IP20 (front panel IP54 when properly gasketed in a control cabinet door) Operating Temperature -20 to +70 °C Dimensions 144 mm × 72 mm × 122 mm Approximate Weight 0.8 kg Supply Terms & Commercial Details
- Availability: Sourced through industrial surplus channels, specialized power generation distributors, and legacy automation parts suppliers.
- 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 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 integrating or replacing the 8440-1666 module in an existing switchgear or generator control panel, observe the following technical parameters:
- Potential Transformer (PT) Scaling: Verify that PT and current transformer (CT) ratios programmed into the module match physical switchgear transformer ratings to ensure accurate synchronization calculations and power measurement.
- Wiring and Isolation: Isolate measuring circuits from control power. Route low-level communication cables and analog signal lines away from high-voltage motor feeds and variable frequency drives to prevent electromagnetic interference (EMI).
- Parameter Backups: Always export and save the configuration file using Woodward configuration software before swapping out a failed unit to streamline commissioning of the replacement hardware.
Frequently Asked Questions
What applications use the Woodward 8440-1666?
This module is deployed in diesel generator paralleling panels, marine switchboards, and industrial co-generation systems requiring automated synchronization and active load sharing.
Can the module be configured via front-panel keys?
Yes, basic parameters can be adjusted via the front display and keypad, while complex logic mapping and fine-tuning are typically executed via PC-based configuration software.
Is this exact part number backward compatible with all SPM-D variants?
Compatibility depends on the specific hardware revision and software package loaded on the unit. Verify with the OEM datasheet or check firmware versions against your existing switchgear schematic before installation.
