Woodward 8237-1600 ProTech-GII Overspeed Protection Device

Key Features

  • 4.2-Inch Color HMI: Enables local configuration of speed thresholds, relay logic, and communication parameters; displays real-time speed, alarms, and trip events for quick status checks.
  • Dual Power Input Flexibility: Supports HV (115/240 Vac, 125 Vdc) and LV (24 Vdc) power sources to adapt to diverse site electrical systems.
  • Independent Trip Relays: Three Form-C relays allow custom alarm/trip mapping without voting logic, simplifying integration with existing shutdown systems.
  • Sulfur-Resistant Design: Conformal coating protects internal components from H₂S/SO₂ corrosion, extending service life in petrochemical and offshore applications.
  • Automatic Overspeed Testing: Performs routine overspeed tests without turbine shutdown to validate trip functionality and minimize operational downtime.
  • MPU Integrity Checks: Continuously verifies dual MPU input consistency; triggers alarms for faulty sensors to prevent false trips or missed overspeed events.
  • Modbus RTU Communication: RS485-based Modbus RTU enables remote monitoring, data logging, and parameter adjustment via SCADA systems.
  • 4-20 mA Speed Readout: Provides proportional speed data for operator visualization and control system integration.
Category:
Description

Technical Specifications

Parameter Details
Product Series ProTech-GII Overspeed Protection Device
Power Supply High Voltage (HV): 115/240 Vac, 125 Vdc; Low Voltage (LV): 24 Vdc; max power consumption 15 W
Speed Sensing Dual MPU inputs; input frequency range 0.1–30 kHz; speed measurement accuracy ±0.02% of rated speed
Speed Output 1×4–20 mA analog speed readout (proportional to measured speed) for SCADA integration
Relay Outputs 3 independent Form-C trip relays (5 A @ 250 Vac, 30 Vdc); configurable for alarm/trip logic
HMI Interface 4.2-inch color display with 15-key keypad for local configuration and monitoring
Operating Temperature -20°C to 60°C (-4°F to 140°F); storage: -20°C to 65°C (-4°F to 158°F)
Relative Humidity Up to 95% (non-condensing)
Certifications EN 61000-6-2 EMC immunity; EN 61000-6-4 emissions; IP54 panel-mount seal; Class 3C2 environment rating; CE, UL certified
Physical Form Factor Panel-mount with backplane structure; 229 mm × 178 mm × 45 mm; weight approx. 1.0 kg (2.2 lb)
Speed Trip Range Configurable 105–120% of rated speed; adjustable time delays (0.1–10 s)
Acceleration Monitoring Configurable over-acceleration thresholds with low-pass filter for signal stability
Coating Sulfur-resistant conformal coating to withstand H₂S/SO₂-rich environments

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 ensure accurate speed monitoring.
  • Event Logging: Time-stamped trip/alarm logs 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 to prevent 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: 4.2-inch color display and 15-key keypad 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.
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