WOODWARD 9907-149 ProTech 203 Electronic Overspeed Trip Device

The WOODWARD 9907-149 ProTech 203 Electronic Overspeed Trip Device is a high-performance electronic overspeed trip device produced by Woodward. Here is a detailed introduction to it:
Core Functions and Technical Features
Over-speed Protection
By monitoring signals from three independent magnetic pickups (MPU), it provides over-speed protection for steam turbines, gas turbines, or other prime movers, preventing severe mechanical damage or even explosion due to over-speed.
Modular Design
Each speed sensing unit (A, B, C) has an independent power supply, operation interface, and alarm system, supporting hot-swappable functionality, facilitating maintenance and testing.
Three-out-of-Two Voting Logic
When two out of the three speed detection circuits detect an over-speed condition, the voting logic relay configuration changes its state, triggering a trip, ensuring system redundancy and reliability.
Programmable Parameters
Users can set parameters such as over-speed setpoint (250 rpm to 25,000 rpm), MPU gear tooth count (20 to 120), and MPU fault timeout (1 second to 533 minutes and 20 seconds), meeting different application requirements.
High Precision and Reliability
Suitable for high-speed (>10,000 rpm) applications, it can replace mechanical over-speed protection devices, providing more reliable over-speed detection and protection.

Technical Specifications
Input Voltage
120 V ac/dc, suitable for various power supply environments.
Dimensions and Weight
Dimensions: Width 19 inches × Height 12.244 inches × Depth 5.62 inches, weight less than 17 pounds, easy for installation and integration.
Operating Temperature
-13°F to +140°F (-25°C to +60°C), suitable for harsh industrial environments.
Protection Grade
NEMA 4/4x, IP54, provides excellent dustproof and waterproof performance.