Woodward 9907-147 ProTech 203 Overspeed Protection System

This compact overspeed protection unit safeguards industrial turbines, compressors, and generators by continuously monitoring rotational speeds via magnetic pickups. Designed for fail-safe operation, it triggers shutdown sequences when critical thresholds are exceeded – a vital layer of defense against catastrophic machinery failures.

Common applications include gas turbine protection in power plants, centrifugal compressor monitoring in refineries, and generator speed control for marine propulsion systems. Our inventory includes compatible interface modules like ABB AC800M controllers, GE VMIVME-7807 I/O boards, and Foxboro FBM203 analog input cards to simplify system integration. This particular unit has proven popular among pulp & paper mills protecting steam turbines against overspeed events during load rejection scenarios.

The system’s ruggedized enclosure maintains reliability across extreme temperatures (-15°C to +60°C) and high-vibration environments. Its de-energize-to-trip design ensures mechanical shutdown in case of power failure – a critical safety advantage over active monitoring systems. Field technicians appreciate the visual trip indication LEDs that remain lit even after power loss, preserving fault history for troubleshooting. When combined with Woodward’s UG-10D digital controllers (e.g., 8521-0312 models), users gain programmable protection profiles for multi-speed machinery applications.