Woodward 8237-1246 ProTech-GII Triple Modular

Product Description

8237-1246 belongs to Woodward ProTech-GII safety series, triple redundant overspeed protection unit for gas, steam and hydro turbines.

It adopts 2oo3 voting architecture with three independent MPU speed input channels, monitors rotor speed and acceleration to trigger safety trip under overspeed fault. Equipped with 

local 4.2-inch display, 4–20mA speed analog output and multi trip relay outputs, IP56 sealed bulkhead housing, conformal coated circuit, supports online hot-swap single module, 

core safety spare for power plant turbine ESD protection systems.

Technical Specifications

Model: 8237-1246, Brand: Woodward, Origin: USA

Architecture: Triple modular redundant, 2-out-of-3 voting safety logic

Speed Input: 3 independent MPU sensor channels, max 32kHz frequency

Max Adjustable Speed Range: Up to 80000 rpm for turboexpander application

Analog Output: 1 channel 4–20mA real-time speed signal

Trip Output: Voted safety relay outputs for turbine fuel shutoff

Power Supply: Dual range 90–264VAC / 100–150VDC wide voltage input

Local HMI: Built-in 4.2-inch LCD display + keypad for parameter setting & fault check

Mounting: Vertical bulkhead wall mounting

Protection Grade: IP56 dustproof & waterproof sealed enclosure

Operating Temperature: -20℃ ~ +60℃ full load

Storage Temperature: -40℃ ~ +70℃

Humidity: 5%–95% non-condensing, anti-corrosion conformal coated PCB

Anti-Vibration: 5g operation, 15g shock resistance

Overall Dimension: 330 × 486 × 153 mm

Net Weight: Approx. 15.9kg

Certifications: SIL3 safety certification, CE, industrial turbine compliance

Key Features

Triple redundant 2oo3 voting design eliminates single point failure, meets SIL3 turbine safety protection requirements.

Three independent MPU speed channels realize full speed signal redundancy, avoid false trip caused by single sensor fault.

Configurable overspeed, over-acceleration and speed-loss protection logic, adaptive to gas/steam/hydro turbine units.

Online hot-swap single module without full system shutdown, greatly reduce equipment maintenance downtime.

Front local LCD display supports real-time speed monitoring, fault record query and protection curve calibration on site.

4–20mA analog speed output transmits rotating speed data to DCS/SCADA remote monitoring system.

IP56 fully sealed housing resists dust, water splash and corrosive gas in power plant turbine workshop.

Built-in automatic trip test function for regular safety loop verification without stopping turbine operation.