Product Description
Woodward 9907-827 ProTech 203 Overspeed Protection System
Product Overview
- The Woodward 9907-827 is a ProTech 203 Overspeed Protection System, designed to provide reliable overspeed protection for steam turbines, gas turbines, and other rotating machinery in industrial applications such as power generation, oil and gas, and process industries. This microprocessor-based safety system is part of Woodward’s ProTech 203 series, offering triple modular redundant (TMR) architecture for high reliability and fault tolerance. The 9907-827 monitors turbine speed using independent speed sensors and initiates a shutdown if an overspeed condition is detected, ensuring equipment and personnel safety. It features three independent, non-voted speed-sensing modules with 2-out-of-3 voting logic for trip outputs. The 9907-827 is a specific variant of the ProTech 203, featuring a 120 VAC/DC power supply for all three modules and potentially specific firmware or configurations compared to other ProTech models (e.g., 9907-828, 9907-829). It includes a user-friendly interface for configuration and diagnostics. The 9907-827 is distinct from Woodward’s control systems like the EasyGen series (e.g., 8440-2179 EasyGen-3500XT, 9907-1182), DSLC series (e.g., 9905-976), 505 series (e.g., 9907-163), 2301D series (e.g., 9907-175), EGCP-3 series (e.g., 8444-1082), SPM-D2 series (e.g., 8446-1048), SPM-A series (e.g., 9907-028), MicroNet Plus (e.g., 8800-1001), TG-13 (e.g., 8516-050), Peak150 series (e.g., 8200-176), ProAct series (e.g., 8237-2595), 723PLUS series (e.g., 8270-1013), EPG systems (e.g., 8290-195), electronic governors (e.g., 8406-121), and actuators (e.g., 8408-921), focusing exclusively on overspeed protection.
Technical Specifications
- The 9907-827 has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | 9907-827 |
| Manufacturer | Woodward |
| Description | ProTech 203 Overspeed Protection System for Turbines |
| Series | ProTech 203 |
| Function | Monitors turbine speed and initiates shutdown on overspeed conditions |
| Architecture | Triple Modular Redundant (TMR) with 2-out-of-3 voting logic |
| Processor | Microprocessor-based (3 independent modules) |
| Memory | Flash: 4–8 MB per module (for firmware) RAM: 2–4 MB per module (for runtime data) |
| Display | Keypad and 2-line LCD per module for configuration and diagnostics |
| Inputs | 3 speed inputs (1 per module, magnetic pickup or proximity probe, 0.5–25 kHz) 3 discrete inputs per module (24 VDC, e.g., reset, start) |
| Outputs | 2 relay outputs per module (dry contact, up to 220 VAC/5 A, for trip and alarm) 1 analog output per module (4–20 mA, for speed monitoring) 2-out-of-3 voted trip relay output |
| Communication Interfaces | 1 serial port per module (RS-232/RS-485, Modbus RTU for monitoring) |
| Speed Range | Configurable, typically 0–25,000 RPM |
| Trip Accuracy | ±0.1% of setpoint |
| Response Time | < 40 ms (typical) |
| Protection Functions | Overspeed, acceleration detection, sensor failure, power supply failure |
| Redundancy | TMR (3 independent modules with 2-out-of-3 voting) |
| Diagnostics | Fault detection, event logging (up to 50 events per module), self-test, status LEDs, real-time speed monitoring |
| Compatibility | Woodward speed sensors, magnetic pickups, proximity probes; interfaces with turbine control systems (e.g., 505, 2301D) and shutdown systems via relay outputs or Modbus |
| Power Supply | 120 VAC (88–132 VAC, 47–63 Hz) or 110–150 VDC for all three modules |
| Power Consumption | Approx. 15–30 W per module |
| Environmental Specifications | Operating Temperature: -25°C to +60°C (-13°F to +140°F) Storage Temperature: -40°C to +85°C (-40°F to +185°F) Relative Humidity: 5% to 95% non-condensing Vibration: IEC 60068-2-6 compliant Shock: IEC 60068-2-27 compliant |
| Enclosure | IP54 (front panel, when properly mounted); IP20 (rear) |
| Dimensions | Approx. 483 mm (H) x 356 mm (W) x 152 mm (D) (19-inch rack mount) |
| Weight | Approx. 8–10 kg |
| Mounting | Panel-mounted or 19-inch rack |
| Certifications | CE, UL, CSA, SIL-3 capable (per IEC 61508), marine certifications (e.g., DNV, ABS, Lloyd’s Register); ATEX/IECEx Zone 2 (configuration-dependent) |