Woodward 8440-1947 – Synchronized Relay | Speed Governing Control Module | Woodward EG/SPM Series
Engineering Background: Woodward Inc. is a global leader in energy control solutions, with over a century of engineering excellence in turbine and engine governing systems. The 8440-1947 Synchronized Relay is a precision control module engineered for synchronizing and governing applications in power generation and industrial drive systems. It forms a critical link in Woodward’s EG/SPM governing platform, ensuring phase-accurate, load-balanced synchronization across parallel generator sets and turbine-driven machinery.
Product Positioning: Designed for procurement engineers and OEM integrators who require a drop-in replacement or new-build component for Woodward-based control architectures. The 8440-1947 delivers deterministic relay switching, robust EMI immunity, and field-proven reliability in harsh industrial environments — making it the preferred choice for power plant MRO, turbine OEM builds, and critical infrastructure upgrades.
Complete Technical Specifications
- Part Number: 8440-1947
- Manufacturer: Woodward, Inc.
- Series / Platform: EG / SPM Governing Series
- Module Type: Synchronized Relay Control Module
- Function: Speed synchronization relay for parallel generator and turbine governor systems
- Input Signal: Compatible with Woodward EG governor analog/digital output signals
- Output: Relay contact switching for synchronizing bus and load-sharing circuits
- Operating Voltage: Per Woodward EG/SPM platform specification (typically 24 VDC / 120 VAC)
- Operating Temperature: -40°C to +70°C (industrial grade)
- Enclosure / Form Factor: DIN-rail or panel-mount module (per OEM installation drawing)
- Weight: 1.9 kg (as shipped)
- Country of Origin: United States
- Compliance: CE, UL recognized component (verify current certification status with Woodward)
Proven Application Environments
- Gas turbine and steam turbine generator synchronization panels
- Diesel genset parallel operation and load-sharing control systems
- Hydroelectric plant governor control cabinets
- Industrial compressor and pump drive speed governing systems
- Marine propulsion and auxiliary power unit (APU) control systems
- Oil & gas upstream/midstream process control platforms
- Utility-scale power plant MRO and capital replacement projects
Engineering Advantages
- Phase-Accurate Synchronization: Relay switching timed to minimize phase angle error at bus tie, reducing mechanical stress on generator windings and prime movers
- EMI/RFI Immunity: Designed to Woodward’s industrial EMC standards for operation in high-noise switchgear environments
- Direct OEM Compatibility: Plug-compatible with existing Woodward EG/SPM wiring harnesses — no field modification required
- Deterministic Response: Fixed relay timing characteristics ensure repeatable synchronization performance across operating cycles
- Long Service Life: Rated for high-cycle relay operation; suitable for continuous duty synchronizing applications
- Compact Form Factor: Optimized for space-constrained control panel retrofits and new-build cabinets
System Architecture & Signal Flow
The 8440-1947 operates within the Woodward EG/SPM governing loop as follows:
- Speed Reference Input: Receives speed/frequency reference signal from the Woodward EG governor or SPM synchronizer module
- Phase Comparison: Internal logic compares incoming bus frequency and phase against the running machine’s output
- Relay Actuation: Upon achieving synchronization window (frequency match + phase angle within tolerance), the relay contact closes to initiate breaker close command
- Load Sharing Handoff: Post-synchronization, the module interfaces with load-sharing circuits to enable smooth kW/kVAR distribution across parallel units
- Fault Indication: Relay de-energizes on out-of-tolerance conditions, providing fail-safe open-circuit protection to the breaker control circuit
Sourcing & Quality Verification
- Source: Konmask.com sources Woodward components from authorized distributors, OEM decommissioning programs, and verified surplus channels
- Inspection: Every unit undergoes visual inspection, part number verification, and functional continuity check prior to listing
- Authenticity: Original Woodward labels, serial numbers, and date codes are preserved and documented
- Packaging: Anti-static bagged, foam-cushioned, and double-boxed for international freight
- Documentation: Certificate of conformance and inspection report available upon request
- Warranty: 12-month operational warranty against manufacturing defects (see Konmask.com warranty policy)
Procurement Process
- Submit RFQ: Contact support@konmask.com with your project BOM, required quantity, and delivery timeline
- Quote & Lead Time: Receive a formal quotation within 1 business day including unit price, freight, and estimated ship date
- Order Confirmation: Purchase order accepted via email; payment terms available for qualified accounts
- Inspection & Dispatch: Unit inspected, documented, and dispatched within 2–5 business days of PO confirmation
- Tracking & Support: Full shipment tracking provided; Konmask technical team available for installation support queries
Technical FAQ
Q: Is the 8440-1947 a direct replacement for older Woodward synchronizing relay modules?
A: Yes — the 8440-1947 is designed as a form-fit-function replacement within the Woodward EG/SPM platform. Verify your existing wiring diagram against the 8440-1947 terminal assignment before installation.
Q: Can this module be used with non-Woodward governor systems?
A: The relay contact outputs are electrically compatible with standard breaker control circuits. However, the input signal interface is optimized for Woodward EG/SPM signal levels. Consult Konmask engineering for cross-platform integration guidance.
Q: What is the typical lead time for this part?
A: In-stock units ship within 2–5 business days. For project quantities (>5 units), contact us for consolidated shipment scheduling.
Q: Do you provide the Woodward installation manual for 8440-1947?
A: Yes — Woodward technical documentation is available upon request with confirmed purchase order. Contact support@konmask.com.
Q: Is export compliance documentation available?
A: Yes — ECCN classification, HTS code, and country of origin documentation provided with each shipment for customs clearance.
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