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Woodward 9907-954
Product Name: 505/505E Series Microprocessor-Based Digital Turbine Governor and Overspeed Protection Controller
Product Introduction: The 9907-954 is a microprocessor-based digital governor controller produced by Woodward, belonging to its classic 505 series. It is primarily designed for speed control and protection of steam turbines. It is specifically designed for single-valve steam turbines, including single extraction/admission systems or split-range actuator configurations.
Detailed content
Technical Specifications:
- Power Supply: +24 VDC, approx. 1 A
- Discrete Outputs: 8
- Analog Outputs: 6
- Actuator Outputs: 2
- Display / HMI: Two-line, 24-character LCD, with multi-function keypad
- Dimensions: Approx. 14 × 11 × 4 in (35.6 × 27.9 × 10.2 cm)
- Weight: Approx. 9.11 lbs (4.13 kg)
- Operating Temperature: –4 to +140 °F (–20 to +60 °C)
- Storage Temperature: –40 to +185 °F (–40 to +85 °C)
- Humidity: 95% RH at 20–55 °C for 48 hours without damage
- Communication Protocol: Modbus, RS-232 / RS-422 serial interfaces
Functional Features: Speed control is achieved by precisely adjusting steam inlet flow. It incorporates triple independent overspeed protection logic for rapid shutdown. An overspeed test button is provided for convenient on-site testing. Equipped with an emergency stop button for immediate shutdown. Automatically switches control modes upon sensor failure.
Application Scenarios: Suitable for steam turbines of various sizes, including industrial steam turbines, small grid turbo-generators, and turboexpanders. Designed for operating steam turbines in single extraction and/or admission applications. Allows on-site operators to program and adjust parameters through an integrated operator control panel.
Structural Features: Front panel Operator Control Panel (OCP) with a two-line, 24-character display and multi-function keypad. Enclosure typically meets industrial dust and water protection standards.
Working Principle: The controller adjusts steam inlet flow to precisely control the speed of steam turbines. It supports single-range or split-range actuators to accommodate turbines of different sizes.
Installation Requirements: Software for configuration includes Version 505View or OpView™. Slot Type: RS-232/RS-422 with Modbus Protocol.
Usage Precautions: Ensure proper configuration to prevent equipment damage. Verify all connections and settings before operation.
