The Woodward 9905-003 is a specialized SPM-A synchronizer and load-sharing speed controller engineered for the precise management of industrial generator sets. This module is essential for automated frequency matching and phase locking, allowing for the reliable paralleling of generators to a common electrical bus. By automating these critical synchronization steps, the 9905-003 prevents common manual errors and protects mechanical drive trains from the stress of out-of-phase coupling. It is widely deployed in demanding applications, including marine power systems, mining microgrids, and peak-shaving utility plants.
Features
Automated Synchronization: Manages phase and frequency matching to ensure seamless breaker closure.
Load Sharing Capability: Maintains proportional distribution of electrical demand across multiple generator units based on rated capacity.
High-Sensitivity Control: Utilizes a responsive analog control loop for real-time monitoring of bus and generator voltage relationships.
Robust Design: Engineered for installation in harsh industrial environments, featuring integrated vibration resistance and EMI shielding.
Flexible Configuration: Supports selectable 115 VAC or 230 VAC input voltages to accommodate diverse power infrastructure.
Technical Specifications
Model
9905-003
Manufacturer
Woodward
Series
SPM-A
Input Voltage
115 VAC or 230 VAC (selectable)
Frequency Range
50/60 Hz
Phase Offset Accuracy
< 5 degrees
Operating Temperature
-40 to +70 deg C
Weight
2.3 kg
Installation Guidelines
Mounting: Ensure the unit is securely chassis-mounted within a control enclosure. The design includes vibration-damping features to protect internal components from rotating machinery.
Signal Integrity: Given the sensitivity of the analog control loop, keep signal wiring segregated from high-power AC lines to minimize electromagnetic interference (EMI).
Grounding: Maintain a clean, low-impedance ground connection to the chassis to ensure stable performance in high-EMI environments.
Safety: Always isolate power sources before performing installation, wiring, or maintenance on the controller.
FAQ
Q: Can the Woodward 9905-003 be used in both 50 Hz and 60 Hz systems? A: Yes, the unit is designed to operate within standard 50 Hz and 60 Hz power frequency ranges.
Q: Does this module handle load sharing after the generator is synchronized? A: Yes, once the circuit breaker is closed, the module transitions from synchronization mode to load-sharing mode, ensuring the electrical load is distributed proportionally across the generators.
Q: What is the primary purpose of the SPM-A controller? A: It is intended to eliminate manual synchronization errors, reduce stress on mechanical coupling, and ensure stable grid integration for industrial power units.
