Description
Description
The Woodward 9905-002N is an SPMA (Synchronizer and Phase Matching) control module engineered for the precise synchronization of AC generators to a utility grid or common bus. Rated for 230 V, 60 Hz operations, this unit automates the critical process of matching generator frequency, phase angle, and voltage before the circuit breaker closes. By providing automated control, the 9905-002N significantly reduces the risk of out-of-phase closure, protecting prime movers and electrical switchgear from severe mechanical and electrical transients.
Features
- Internal phase-lock loop (PLL) circuitry for real-time phase angle monitoring.
- Adjustable setpoints for phase window and dwell time to accommodate varying load dynamics.
- Proportional bias output signal for seamless integration with engine governor systems.
- Ruggedized construction designed for reliable operation in high-vibration industrial environments.
- High electromagnetic interference (EMI) immunity for stable performance in power generation facilities.
Applications
This synchronizer is widely deployed in mission-critical power management environments, including:
- Industrial power generation and cogeneration plants.
- Standby and emergency power systems for refineries and chemical processing facilities.
- Microgrid management for mining operations and remote sites.
Technical Specifications
| Model |
9905-002N |
| Brand |
Woodward |
| Device Type |
SPMA Synchronizer Control |
| Input Voltage |
230 V |
| Frequency |
60 Hz |
| Power Consumption |
10 W |
| Operating Temperature |
-40 to +70 deg C |
| Storage Temperature |
-55 to +85 deg C |
| Weight |
1.88 kg |
Installation Guidelines
- Ensure the system power is completely disconnected before installing or removing the module.
- Mount in a clean, dry, and vibration-dampened control panel enclosure.
- Maintain adequate clearance around the unit for proper thermal dissipation.
- Use shielded, twisted-pair cabling for all analog inputs to minimize noise pickup.
- Verify that the ground connection is secure to maintain EMI protection integrity.
- Confirm that the phase-matching logic settings align with site-specific generator and bus requirements before commissioning.
FAQ
What is the primary function of the 9905-002N?
The 9905-002N acts as an automated synchronizer that manages the frequency, voltage, and phase matching of a generator to a bus, ensuring safe and stable circuit breaker closure.
Is this module suitable for high-vibration environments?
Yes, the 9905-002N is built with a ruggedized industrial design capable of maintaining logic stability in harsh engine room conditions.
