WOODWARD 9907-147 ProTech 203 Overspeed Protection System

The WOODWARD 9907-147 is a ProTech 203 triple-channel overspeed protection system designed for critical rotating machinery. It adopts two-out-of-three voting logic to monitor shaft speed via magnetic pickup sensors, triggering safe shutdown when rotational speed exceeds preset threshold to prevent catastrophic equipment failure.

This unit supports independent configuration for each channel, built-in fault diagnosis and local human-machine operation panel. It complies with international power industry safety standards and can communicate with upper DCS and monitoring systems. Widely used for turbine control cabinet maintenance, unit overhaul and spare parts stocking in power, oil & gas industries.

Main Specifications

• Brand: WOODWARD
• Model: 9907-147 ProTech 203 Overspeed Protection System
• Logic Mode: 2-out-of-3 voting safety architecture
• Power Supply: 18–32 VDC industrial control power
• Sensor Input: Compatible with magnetic pickup speed sensors
• Frequency Range: 100 Hz ~ 32 kHz speed detection
• Trip Logic: De-energize-to-trip fail-safe design
• Communication: Serial interface for configuration and data upload
• Operating Temperature: -40°C ~ +70°C
• Installation: Panel mounting, industrial enclosure protection

Core Functions

• Real-time continuous speed monitoring of steam turbines, gas turbines and generators
• Three independent measurement channels to avoid single-point monitoring failure
• Configurable overspeed trip setpoints and delay parameters for each channel
• Automatic hardware self-test and sensor circuit fault detection function
• Fail-safe trip output to drive emergency shutdown valve and protection circuit
• Local panel parameter setting, status display and fault code inquiry
• Store event records, overspeed trip logs and equipment operation history
• Transmit operating status and alarm signals to upper monitoring platform
• Support online testing and simulation verification of protection functions
• Meet safety protection requirements of large-scale rotating power equipment

Application Scenarios

• Thermal power plant steam turbine generator overspeed protection cabinets
• Combined cycle power plant gas turbine safety control systems
• Oil & gas plant compressor and turbo-expander protection occasions
• Waste heat power generation unit rotating machinery monitoring platforms
• Industrial self-provided power plant generator safety interlock projects
• Petrochemical factory large rotating equipment protection control racks
• Pipeline transportation turbo-machinery overspeed monitoring systems
• Biomass power generation turbine safety protection control occasions
• WOODWARD turbine control system maintenance, overhaul and spare parts replacement
• All industrial sites requiring high-reliability overspeed safety protection