SPECIFICATIONS
Part No.: IS200VTURH1ACB
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Manual: GEH-6421
Flame detectors 8 per VTUR
Shaft voltage wiring: Up to 300 m
MPU pulse rate accuracy: 0.05 percent of reading
MPU input circuit sensitivity: 27 mV pk
Product Type: Turbine Specific Primary Trip Board
Availability: In Stock
Series: Mark VI
Functional Description
IS200VTURH1ACB is a Turbine Specific Primary Trip Board developed by GE. It is part of the Mark VI series. It plays a pivotal role in turbine safety and operational control, particularly in managing trip solenoids and flame detection within the turbine environment. Primarily, it is responsible for driving three trip solenoids utilizing a single TRPx board. Simultaneously, it accommodates and interfaces with eight flame detectors, enhancing the turbine's safety measures by promptly detecting potential flame-related issues.
Primary Function and Operation
- Responsible for driving three trip solenoids through a single TRPx terminal board. These solenoids are essential components that execute emergency shutdowns (trips) when unsafe operating conditions are detected.
- The board also supports and interfaces with up to eight flame detectors, providing continuous monitoring of flame presence in the turbine’s combustion chamber. By detecting flame instability or loss, the system can trigger immediate safety responses to prevent damage or hazardous conditions.
Trip Signal and Relay Control
- A key feature of the board is its management of three primary overspeed trip relays located on the TRPx terminal board. The overspeed protection function is vital, as excessive turbine speed can lead to catastrophic mechanical failure. The controller generates trip signals that are first routed through the VTURH1 board before being sent to the TRPx terminal board. This process initiates the activation of the trip solenoids, ensuring a fast and reliable turbine shutdown sequence when necessary.
- The overspeed trip command can originate from either the VTURH1 or the Protection Processor board. This dual-source capability provides a redundant safety path, ensuring that even if one component fails, the system retains its ability to execute a protective trip command. Such redundancy is a cornerstone of the Mark VI design philosophy, enhancing operational reliability and minimizing risk.
Relay Configuration and System Redundancy
- Inside the VTURH1 board are nine magnetic relays that connect directly to the three trip solenoids, collectively known as Electrical Trip Devices (ETDs). These relays form the interface between control logic and the physical trip mechanisms.
- In Triple Modular Redundant (TMR) systems, all nine relays are active. This setup divides control logic across three independent control paths, ensuring that even if one or two channels fail, the system can still perform a safe turbine trip.
- In Simplex configurations, where redundancy is limited, only three relays are used—one per solenoid—to maintain essential operational safety while reducing hardware complexity.
- This flexible configuration allows the board to be deployed across different turbine control architectures, depending on the system’s safety and redundancy requirements.
Flame Detection and Safety Integration
The inclusion of eight flame detector interfaces significantly enhances turbine safety. These detectors continuously monitor combustion conditions and provide real-time feedback to the control system. If an abnormal condition—such as flame loss or instability—is detected, the board facilitates an immediate trip action to prevent potential damage or fire hazards. This integration between trip logic and flame detection ensures a coordinated safety response, improving both protection speed and reliability.
Installation Procedure
- Power Down the VME Processor Rack: Start by powering down the VME processor rack to ensure a safe installation process. This step is crucial to prevent any electrical mishaps during the installation of the board.
- Slide in the Board and Seat Edge Connectors: Carefully slide the V-Type board into the designated slot in the VME processor rack. Ensure proper alignment and gentle insertion to avoid damage. Once inserted, use your hands to push the top and bottom levers, securing the board's edge connectors firmly in place.
- Secure with Captive Screws: After properly seating the board, tighten the captive screws located at the top and bottom of the front panel. This step ensures the board's stability within the rack, preventing any dislodgment during operation.
- Cable Connections to Terminal Boards- Make cable connections to the terminal boards according to the specified connectors:
- Use the latching type connectors located at the J3 connector on the lower portion of the VME rack to secure the cables effectively.
- Connect the cable to the J5 connector on TTUR from J5 on the front panel.
- For the cable connection to TRPG, utilize the J4 connector.
- Power Up and Diagnostic Check: With the board securely installed and cables connected, power up the VME rack. Subsequently, check the diagnostic lights situated at the top of the front panel. Ensure that the diagnostic lights indicate the proper functioning of the system, verifying a successful installation.
Fast Overspeed Trip
In certain specialized scenarios demanding an accelerated overspeed trip response, the VTUR system offers Fast Overspeed Trip algorithms, designed to enhance safety measures in critical turbine operations. This feature allows the activation of faster-overspeed trip mechanisms, ensuring rapid response times during specific operational conditions.
Enabling VTUR Fast Overspeed Trip Algorithms
- The Fast Overspeed Trip algorithms within the VTUR system employ a unique speed measurement algorithm calculated based on a predetermined tooth wheel.
- These algorithms offer distinct functionalities tailored to meet varying operational requirements:
PR_Single Algorithm
- The PR_Single algorithm facilitates the utilization of two redundant boards by allocating each of the two redundant PR (Pulse Rate) transducers to a separate board. This configuration ensures redundancy and reliability in overspeed trip functionalities.
- It stands out as the preferred algorithm, particularly well-suited for LM (Land and Marine) gas turbines, providing enhanced safety and redundancy in critical overspeed protection.
PR_Max Algorithm
- Contrarily, the PR_Max algorithm operates using a single VTUR connected to the two redundant PR transducers. This setup allows for comprehensive functionality, offering protection mechanisms against scenarios such as broken shaft incidents and deceleration, all while mitigating the risk of a nuisance trip in case one of the transducers malfunctions or is lost. PR_Max algorithm implementation ensures a balance between robust protection and minimizing the potential for false alarms or nuisance trips, enhancing operational stability.
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 IS200VTURH1ACB?
It is a turbine specific primary trip board developed by GE under the Mark VI series.
What method does the Auto Sync K25 function use for synchronization?
The Auto Sync K25 function utilizes zero-voltage crossing techniques to ensure precise synchronization during turbine operations.
How does it manage breaker time delay, especially in dual breaker setups?
It compensates for breaker time delay by utilizing two adjustable constants and logic selection between them, specifically designed for dual breaker applications.
What calculations does VTUR perform related to synchronization and breaker delay?
It performs crucial calculations, including phase, slip, acceleration, and anticipated time lead for the breaker delay to ensure precise synchronization.
How is the time delay parameter adjusted in the Auto Sync K25 function?
The time delay parameter is adjusted within specified limits based on the measured breaker close time, enabling fine-tuning of synchronization for optimal performance.
