SPECIFICATIONS
Part No.: IS200VPROH1BCB
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Technology:Surface mount
Product Type: Turbine Protection Board
Availability: In Stock
Series: Mark VI
Functional Description
IS200VPROH1BCB is a Turbine Protection Board developed by GE. It is a part of the Mark VI control system. The Turbine Protection Board serves a critical role in ensuring the safety and reliability of a turbine system, particularly during emergency overspeed conditions. Together with the associated terminal boards, TPRO and TREG, the VPRO forms an independent emergency overspeed protection system, separate from the primary turbine control system. This redundant setup enhances the overall safety and reliability of the protection system.
Features
- Triple Redundancy: The protection system incorporates triple redundant VPRO boards within a dedicated Protection Module (P). This redundancy is essential for robustness and fault tolerance in emergency situations.
- Emergency Overspeed Protection:The primary function of the board is to provide emergency overspeed protection. It is designed to monitor turbine speed and, in the event of an overspeed condition, initiate the emergency trip function to promptly shut down the turbine.
- Trip Solenoids and Terminal Boards:Up to three trip solenoids can be connected between the TREG and TRPG terminal boards. It provides the positive side of the 125 V dc required for the solenoids, while TRPG provides the negative side. Either board, TREG or TRPG, has the capability to trip the turbine, adding redundancy to the emergency shutdown mechanism.
- Control of Trip Solenoids: The board plays a central role in controlling the trip solenoids. It communicates with the TREG and terminal boards to manage the positive and negative sides of the solenoid circuits, ensuring precise and coordinated control over the emergency trip function.
- Ethernet Connection for IONet Communications: To facilitate communication and coordination with other control modules, the VPRO board is equipped with an Ethernet connection for IONet communications. This enables seamless integration and data exchange within the broader control system.
- Relays on TREG: TREG is equipped with 12 relays, with nine forming three groups of three. These relays are crucial for voting inputs that control the three trip solenoids. The voting mechanism enhances reliability by requiring agreement among multiple signals before initiating a trip action.
- System Architecture: The figures illustrate the cabling arrangement from the TPRO and terminal boards to the VPRO board, highlighting the interconnectedness of these components. This well-defined architecture ensures the efficient flow of signals and power within the protection system.
Installation
Power Down the VME I/O Processor Rack:
- Initiate a Controlled Shutdown: Before beginning the installation process, initiate a controlled shutdown of the VME I/O processor rack. Ensure that all connected systems and processes are safely halted, and power is disconnected to avoid any potential electrical hazards.
- Verify Power Down: Confirm that the VME I/O processor rack is completely powered down. Ensure that all lights and indicators on the front panel are extinguished, indicating a safe and secure power-off state.
Slide the Board:
- Identify the Appropriate Slot: Locate the designated slot within the VME I/O processor rack for the installation of the VPRO board. Refer to the system documentation or markings on the rack for the correct slot.
- Align the VPRO Board:Carefully align with the slot, ensuring that the edge connectors on the board match the corresponding connectors within the rack. Take caution to align the board evenly for a proper fit.
- Engage Top and Bottom Levers:With the board correctly aligned, use your hands to push in the top and bottom levers. This action secures the edge connectors of the board within the slot, providing a stable and reliable connection.
Tighten Captive Screws:
- Locate Captive Screws:Identify the captive screws located at the top and bottom of the front panel of the VPRO board. These screws play a crucial role in securing the board in place.
- Use Appropriate Tool:Utilize an appropriate tool, such as a screwdriver, to tighten the captive screws. Ensure that the screws are securely fastened, preventing any unintended movement or dislodging of the VPRO board.
Power Up the VME Rack:
- Restore Power: Once the board is securely installed and captive screws are tightened, proceed to restore power to the VME I/O processor rack. Reconnect the power source and initiate the power-up sequence.
- Check Diagnostic Lights:Direct your attention to the diagnostic lights at the top of the front panel. Observe the light patterns to ensure they align with the expected indications for normal operation. Refer to the system documentation for details on interpreting the diagnostic lights.
Operation
- The protection module serves as a critical component within the turbine control and safety system, primarily focusing on emergency overspeed (EOS) protection for the turbine.
- The main functionalities and features of the VPRO boards within this module are designed to ensure the safe and reliable operation of the turbine in various scenarios.
- The core purpose of the protection module is to provide robust and reliable emergency overspeed protection for the turbine. This is achieved through the utilization of three VPRO boards operating in a triple redundant configuration. The redundancy enhances the system's fault tolerance and ensures that overspeed conditions are promptly detected and mitigated.
- Specifically engineered to execute the emergency trip function in response to overspeed events. When the turbine's rotational speed exceeds safe limits, the VPRO boards initiate the necessary actions to bring the turbine to a controlled stop, preventing catastrophic failure.
- In addition to emergency overspeed protection, the VPRO boards provide backup synchronization check protection. This functionality involves monitoring and verifying the synchronization status of critical components within the turbine system. The backup synchronization check adds an extra layer of safety, ensuring that the turbine operates within specified synchronization parameters.
- The VPRO feature three analog current inputs, offering the capability to monitor and measure electrical currents in real-time. This functionality is versatile and can be employed for various purposes, such as tracking the performance of critical components or systems within the turbine.The protection module is equipped with nine thermocouple inputs, primarily designed for exhaust over-temperature protection in gas turbines. These inputs enable precise monitoring of temperature levels in the exhaust system, allowing the system to respond promptly to potential overheating conditions.
- The combination of emergency overspeed protection, backup synchronization check, analog current monitoring, and thermocouple inputs for temperature monitoring creates a comprehensive safety net for the turbine system. The protection module ensures that the turbine operates within specified limits, mitigating risks associated with overspeed, synchronization issues, and temperature abnormalities.
VPRO Diagnostics for the Auto Synchronous Function
- K25A Relay (Synch Check) Driver Mismatch Requested State:
- This diagnostic message indicates that there is a mismatch between the requested state of the K25A relay driver and its actual state. Essentially, the VPRO system cannot establish a current path from VPRO to the TREx terminal board through the K25A relay.
- Possible causes:
- Faulty relay driver circuitry.
- Discrepancy between the requested and actual relay states.
- Issues with wiring connections between VPRO and TREx terminal boards.
- Troubleshooting steps:
- Check the integrity of the relay driver circuitry and associated components.
- Verify that the requested relay state aligns with the actual relay state.
- Inspect wiring connections between VPRO and TREx terminal boards for any loose or damaged connections.
- Perform diagnostic tests to identify and resolve any discrepancies in relay operation.
- K25A Relay (Synch Check) Coil Trouble, Cabling to P28V on TTUR:
- This diagnostic message indicates trouble with the K25A relay coil, specifically related to the cabling connected to P28V on the TTUR (Turbine Terminal Unit Rack) terminal board. It suggests that the K25A relay is not functional, which could be attributed to an open circuit between the TREx and TTUR terminal boards or a missing P28V power source on the TTUR terminal board.
- Possible causes:
- Faulty relay coil or associated circuitry.
- Open circuit between TREx and TTUR terminal boards.
- Absence of P28V power source on the TTUR terminal board.
- Troubleshooting steps:
- Inspect the K25A relay coil and associated circuitry for any signs of damage or malfunction.
- Check for continuity in the cabling between the TREx and TTUR terminal boards to identify any open circuits.
- Verify the presence and integrity of the P28V power source on the TTUR terminal board.
- Perform voltage measurements and diagnostic tests to isolate and rectify the underlying issues affecting the K25A relay functionality.
The WOC team is always available to help you with your Mark VI requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200VPROH1BCB?
It is a Turbine Protection Board developed by GE under the Mark VI series.
What do the three LEDs at the top of the front panel signify?
The three LEDs on the front panel convey essential status information. The normal operating condition is indicated by a flashing green LED, signifying the RUN state. In contrast, a solid red LED signifies the FAIL condition. The third LED, named STATUS, typically remains off under normal circumstances but turns into a steady orange if a diagnostic alarm condition arises within the board.
What does a flashing green LED indicate?
A flashing green signifies the normal operational state, known as the RUN condition. This indicates that the board is functioning correctly and actively monitoring the turbine system.
What does a solid red LED on the front panel indicate?
It indicates the FAIL condition. This state suggests that the board has encountered an issue or fault that requires attention. The solid red LED serves as a clear visual indicator of a potential problem within the board.
What is the significance of the third LED labeled STATUS?
The third LED, named STATUS, is normally off during regular operation. However, if a diagnostic alarm condition arises, the STATUS LED illuminates with a steady orange light. This provides a visual indication of the board's diagnostic status, alerting operators to the presence of an issue that requires investigation or resolution.
