Digital guide
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Woodward 9907-487
Product Name: ProTech Overspeed Protection System Speed Monitoring Module
Product Overview: ProTech series turbine overspeed protection monitoring unit, serving as the core module of ETS overspeed protection. It receives multiple magnetic speed sensor signals, monitors turbine speed in real time, and outputs a trip relay signal to trigger emergency unit shutdown when the speed exceeds the set overspeed threshold. It features speed overrun, sensor fault, and line break diagnostics, serving as an independent third-party overspeed protection device for the unit.
Detailed content
Technical Specifications:
- Speed Input: Up to 3 magnetic pickup (MPU) speed sensors
- Input Frequency Range: 10-10000 Hz
- Power Supply: 24 VDC
- Relay Output: Dry contact trip output, contact rating 250 VAC 5A
- Overspeed Threshold Adjustable Range: 100%-120% of rated speed
- Operating Temperature: -25°C to 60°C
- Protection Class: IP20, panel mounted in control cabinet
Functional Features:
- 2-out-of-3 speed voting logic; a single speed sensor failure will not cause false tripping.
- Real-time monitoring of sensor disconnection and short-circuit faults with fault alarm output.
- Overspeed trip relay hardware hard-contact output, independent of software logic.
- Supports local button parameter setting and remote communication status reading.
- Event recording function, saving overspeed and fault event history.
Application Scenarios: ETS overspeed protection for turbine generator sets, independent overspeed protection for industrial drive turbines, speed overrun protection for gas turbines, third-party independent overspeed protection systems for power plant units.
Performance Parameters:
- Speed measurement accuracy: ±0.05% of full scale
- Overspeed trip response time: ≤ 15 ms
- Event record storage: no less than 200 historical events
Material Composition:
- Enclosure: Aluminum alloy metal housing
- Circuit Board: Industrial wide-temperature FR-4 board
- Terminal Blocks: Gold-plated copper alloy anti-vibration terminals
Structural Features: Standard panel-mounted enclosure with digital display window and buttons on the front. Status indicator lights are arranged on the panel to indicate normal speed, overspeed, and sensor faults respectively. Wiring terminals are arranged on the back of the enclosure, including speed sensor inputs, power supply, trip relay contacts, and communication interface. Fixed ears on both sides of the enclosure for installation on control cabinet rails.
