Woodward 8237-1369 ProTech-GII Overspeed Protection Device

Functional Capabilities

• Overspeed & Over – acceleration Monitoring: Tracks speed in real – time; triggers trip relays when exceeding user – set thresholds or acceleration rates to avoid rotor damage.
• Configurable Trip Logic: Allows setting of multiple speed thresholds (warning, pre – trip, trip) with adjustable time delays to match turbine dynamics.
• MPU Signal Validation: Cross – checks dual MPU inputs for consistency; flags signal loss or drift to prevent false trips or missed overspeed events.
• Event Logging: Time – stamps overspeed events, sensor faults, and relay activations for post – incident analysis and compliance reporting.
• Online Module Replacement: Permits hot – swapping of faulty modules without turbine shutdown, reducing maintenance – related downtime.
• Pre – Trip Alarms: Triggers alarm outputs before trip activation to alert operators and enable proactive intervention.

Application Scenarios

• Steam/Gas Turbines: Protects utility – scale and industrial turbines in power plants, refineries, and chemical facilities from overspeed – induced failures.
• Hydroelectric Turbines: Monitors speed in hydropower plants, preventing damage from sudden load loss or guide vane malfunctions.
• Offshore Platforms: Sulfur – resistant design suits H₂S/SO₂ – rich environments on offshore rigs and LNG carriers.
• Petrochemical Plants: Safeguards process turbines handling corrosive gases where reliability and uptime are critical.
• Turbine Retrofits: Replaces legacy overspeed protection systems with minimal wiring changes, upgrading safety without full control system overhauls.
• Marine Propulsion Turbines: Works with shipboard power systems to ensure safe operation during dynamic load changes at sea.

Configuration & Maintenance

• Local Configuration: 15 – key keypad and display for setting speed thresholds, relay logic, and communication parameters; password – protected access prevents unauthorized changes.
• Power Input Setup: Selects HV or LV power mode via DIP switches; auto – detects voltage fluctuations to maintain stable operation.
• MPU Calibration: Auto – calibrates to MPU signals (1–30 Vac) for accurate speed measurement; configures input frequency range to match turbine specifications.
• Modbus Setup: Sets baud rate, parity, and slave address via the front panel for seamless SCADA integration.
• Overspeed Test Scheduling: Programs automatic test intervals to validate trip functionality without disrupting turbine operation.
• Diagnostics: Front – panel LEDs indicate power status, MPU signal health, relay activation, and communication connectivity for quick troubleshooting.
• Firmware Updates: Supports in – field firmware upgrades via the service port to add new features and maintain compliance.

Safety & Compliance Notes

• Pollution Degree 3 Rated: Operates reliably in environments with conductive dust and moisture, meeting industrial safety standards.
• EMC Compliant: Conforms to EN 61000 – 6 – 2 (immunity) and EN 61000 – 6 – 4 (emissions) to avoid interference with adjacent control equipment.
• Sulfur Resistance: Extends service life in sulfur – rich atmospheres, reducing maintenance frequency and costs.