Woodward 9907-164 505 Digital Governor Controller

Key Features

  • Precision Speed Regulation: Maintains ±0.1% steady-state speed accuracy across load changes to ensure stable turbine/generator output.
  • Split-Range Actuator Support: Drives 1–2 steam inlet valves via dual actuator outputs for single or split-stage steam admission control.
  • Integrated Operator Control Panel: 2-line LED display + 30-key keypad enables local parameter setup, status monitoring, and overspeed test initiation.
  • Critical Speed Avoidance: Automatically skips user-defined critical speed bands during startup/shutdown to prevent turbine resonance damage.
  • First-Out Trip Indication: Logs and displays the root cause of shutdowns (overspeed, low oil pressure, high temperature) for rapid troubleshooting.
  • Modbus Communication: RS-232/RS-422 ports support remote configuration, data logging, and SCADA integration via 505View software.
  • Auto Start/Stop Sequencing: Executes preprogrammed start/stop logic with warm-up delays and load ramp rates to optimize turbine life.
  • IP56 Enclosure: Protects against dust and water ingress for reliable operation in petrochemical/refinery environments.
Category:
Description

Technical Specifications

Parameter Details
Product Series 505 Digital Governor Controllers for Steam Turbines
Power Supply 18–32 Vdc (nominal 24 Vdc); max current 1 A; max power consumption 24 W; reverse polarity protected
Speed Control Magnetic pickup (MPU) input; speed range 100–10,000 rpm; steady-state regulation accuracy ±0.1%
Actuator Outputs 2×actuator outputs (0–10 Vdc/4–20 mA, 500 mA max) for single or split-range steam inlet valve control
Analog I/O 6×programmable 4–20 mA analog inputs (pressure, temperature, load reference); 6×programmable 4–20 mA/0–10 Vdc analog outputs (speed/load share, valve position)
Discrete I/O 16×contact inputs (4 dedicated: start/stop, overspeed test, trip reset; 12 programmable, 24 Vdc, 300 mA max); 8×Form-C relay outputs (5 A @ 250 Vac/30 Vdc) for alarms/trips
Communication RS-232/RS-422 (Modbus RTU); optional Ethernet via LinkNet-HT modules; supports 505View/OpView™ software for configuration
Display & Keypad 2-line × 24-character LED display; 30-key multi-function keypad for local programming; menu-driven navigation
Environmental Ratings Operating temperature: -40°C to 60°C (-40°F to 140°F); storage: -40°C to 85°C (-40°F to 185°F); humidity: 95% non-condensing (48 hrs @ 20/55°C); enclosure IP56 (IEC 60529)
Certifications CE, UL, Class 1, Division 2 compliant for hazardous locations
Physical Form Factor Panel-mount; dimensions 356 mm × 279 mm × 102 mm (14W × 11H × 4D inches); weight 4.13 kg (9.11 lbs)
Core Protection Overspeed trip (3–10% above rated speed); critical speed avoidance; valve position limiters; first-out shutdown indication

Functional Capabilities

  • Speed & Load Control: Regulates turbine speed via MPU input and manages load via 4–20 mA load share signals for parallel generators.
  • Extraction/Admission Control: Controls single extraction or admission steam flows to maintain header pressure/process steam demand.
  • Overspeed Protection: Triggers mechanical/hydraulic overspeed trips when exceeding user-set thresholds (3–10% above rated speed).
  • Valve Position Limiting: Restricts steam valve travel to prevent overloading and protect turbine components.
  • Event Logging: Records up to 100 time-stamped trip events and process trends for post-incident analysis and compliance reporting.
  • Remote Reference Adjustment: Accepts 4–20 mA analog inputs for remote speed/load reference from DCS or PLC systems.
  • Parameter Lockout: Password-protected access to critical settings (speed setpoints, trip thresholds, valve limits) to prevent unauthorized changes.

Application Scenarios

  • Industrial Steam Turbines: Controls single-valve, single-extraction, or single-admission steam turbines in power generation, petrochemical, and pulp/paper plants.
  • Turbogenerators: Manages speed and load for on-site power generation in remote mining, oil/gas, and manufacturing facilities.
  • Turboexpanders: Regulates gas expansion turbines in cryogenic plants and natural gas processing for energy recovery.
  • Cogeneration (CHP) Systems: Balances steam supply and electrical output for combined heat and power applications in district heating networks.
  • Petrochemical Refineries: Operates in Class 1, Division 2 areas to control process steam turbines and compressors with IP56 protection.
  • Marine Propulsion: Controls steam turbines for shipboard power and propulsion systems requiring reliable speed regulation.

Configuration & Maintenance

  • Local Programming: Uses front-panel keypad/display to set speed setpoints, load limits, and trip thresholds via menu-driven software.
  • PC-Based Configuration: 505View/OpView™ software via RS-232/RS-422 configures control logic, PID gains, and I/O mapping.
  • MPU Calibration: Auto-calibrates to MPU frequency (30–300 Hz) for accurate speed measurement; triggers alarms on signal loss.
  • Firmware Updates: Supports in-field firmware upgrades via serial port to add new features and maintain compliance with industry standards.
  • Diagnostic Tools: Front-panel LEDs indicate power status, MPU signal health, relay activation, and communication connectivity for fast troubleshooting.
  • Module Replacement: Drop-in compatibility with legacy 505 series controllers minimizes retrofit costs and downtime.
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