Woodward 9907-147 | ProTech-203 TMR Overspeed Protection

Woodward 9907-147 ProTech-203 Overspeed Protection System Module

The 9907-147 (Model: 9907-147 REV N) is a high-integrity digital overspeed protection device belonging to the Woodward ProTech-203 family. Engineered for mission-critical turbine applications, this system employs a Triple Modular Redundant (TMR) architecture to ensure maximum operational safety. The 9907-147 (Part Number: 9907-147) monitors prime mover speed via three independent magnetic pickups (MPUs), each feeding a dedicated CPU. By utilizing two-out-of-three (2oo3) voting logic, the system eliminates single points of failure, providing reliable trip execution even if a single sensor or processor channel fails.

This specific version of the 9907-147 (ProTech-203: 9907-147) is a De-Energize-to-Trip (DET) model. In this configuration, the trip relays are normally energized during safe operation and will de-energize to trigger a turbine shutdown. This fail-safe design ensures that the turbine enters a protected state in the event of total power loss, wire breakage, or internal hardware faults. Adhering to strict industrial safety standards (E-E-A-T), the unit is housed in a lockable metal enclosure, making it the industry standard for protecting gas, steam, and hydro turbines in power generation and petrochemical facilities.

Detailed Technical Specifications

The 9907-147 (9907-147) provides high-resolution speed measurement and ultra-fast hardware-based response times.