Generator Sync Module Woodward 9905-002 | SPM-A Control Unit

Woodward 9905-002 SPM-A Synchronizer – Product Description

Overview
The Woodward 9905-002 SPM-A Synchronizer helps operators align generators with an active bus under varying load and grid conditions. It continuously evaluates voltage, frequency, and phase angle, then adjusts the generator speed to achieve precise synchronization. Moreover, its stable closed-loop response supports reliable paralleling in demanding industrial environments. The unit is designed for long-term service, and its proven performance makes it suitable for power plants, marine vessels, and utility interconnections.

Functional Highlights
The synchronizer provides accurate measurement of generator and bus parameters, enabling consistent control during parallel operation. In addition, it sends a breaker-close signal once the system meets preset synchronization criteria, reducing human error during tie-in. Its compact design simplifies panel integration, while rugged construction supports continuous operation in harsh locations. Therefore, facilities can maintain stable power quality while increasing overall system safety.

Technical Specifications

Attribute — Specification
Model — 9905-002
Type — SPM-A Synchronizer
Control Functions — Voltage, frequency, and phase-angle matching
Speed Biasing — Actively adjusts offline generator speed
Breaker Output — Breaker close command when synchronized
Input Sensing Voltage — 90–150 VAC
Compatibility — AC generators, utility grid paralleling
Dimensions — 250 × 120 × 40 mm
Weight —2.2 kg
Certifications — CE, UL
Origin — USA

FAQ

Q1: Does the 9905-002 work with older Woodward governors?
Yes. Most legacy Woodward governors accept its speed-bias signal without requiring major modifications.

Q2: Can the unit synchronize different generator sizes?
Yes. It evaluates electrical parameters rather than mechanical ratings, so mixed-capacity systems can be synchronized if protection settings are correct.

Q3: Is calibration needed after installation?
Only basic adjustments are required during commissioning, and routine checks help maintain long-term accuracy.

Q4: What environment is recommended for installation?
A clean, vibration-controlled panel enclosure is recommended to ensure consistent sensing performance.

Q5: Does it support automatic breaker control?
Yes. The unit issues a breaker-close command once all synchronization criteria are satisfied.