SPECIFICATIONS
Part No.: IS200VTURH1BAC
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
MPU pulse rate range: 2 Hz to 20 kHz
MPU pulse rate accuracy: 0.05 percent of reading
MPU input circuit sensitivity: 27 mV pk
Technology: Surface mount
Temperature: -30 to 65oC
Product Type: Turbine Specific Primary Trip Board
Availability: In Stock
Series: Mark VI
Functional Description
IS200VTURH1BAC is a Turbine Specific Primary Trip Board developed by GE. It is a part of Mark VI control system. The control function oversees three key overspeed trip relays situated on the terminal board. Triggered by the controller, the trip signal is relayed before reaching TRPG to initiate the activation of emergency solenoids. The turbine's overspeed trip command may originate from either VTUR or VPRO. TRPG accommodates nine magnetic relays tasked with interfacing with three trip solenoids, referred to as Electrical Trip Devices (ETD). In TMR systems, all nine relays are engaged, whereas in simplex systems, only three are utilized.
Turbine Speed Measurement and Overspeed Trip
- Turbine Speed Measurement: The board measures turbine speed using four passive pulse rate devices. These devices detect rotational speed changes and convert them into electrical signals.
- Overspeed Trip Generation: The speed signal is passed to the controller, which generates the primary overspeed trip signal. This signal acts as a safety mechanism to prevent the turbine from exceeding its maximum operating speed, ensuring equipment and personnel safety.
Generator Synchronizing and Breaker Closure
- Automatic Generator Synchronizing: Facilitates automatic generator synchronizing, ensuring the smooth and efficient synchronization of multiple generators. This process involves matching the phase, frequency, and voltage of the generators before paralleling them.
- Main Breaker Closure: After synchronization is achieved, the board closes the main breaker, allowing the synchronized generators to supply power to the grid or connected loads.
Shaft Voltage and Current Monitoring
- Induced Shaft Voltage Monitoring: The board monitors induced shaft voltage, providing crucial insights into the condition of the turbine shaft and associated electrical systems. Monitoring shaft voltage helps detect abnormalities or potential issues that could affect turbine performance or safety.
- Shaft Current Monitoring: Additionally, the board monitors shaft current, another important parameter in assessing turbine health and performance. Shaft current monitoring helps identify issues such as bearing wear, insulation breakdown, or electrical faults.
Flame Detection and Overspeed Trip Control
- Flame Detector Monitoring: The board is responsible for monitoring eight Geiger Mueller flame detectors in gas turbine applications. These detectors are connected to the board and supplied with 335 V DC, 0.5 mA from an external power supply.
- Overspeed Trip Relay Control: The board controls three primary overspeed trip relays on the TRPG terminal board. It generates trip signals based on turbine speed and other parameters, activating the emergency solenoids to shut down the turbine in case of an overspeed condition. This safety mechanism is crucial for preventing catastrophic failures and ensuring personnel safety.
Calculation and Transmission of Primary Trip Signal
- Controller Calculation: The normal primary overspeed trip signal is calculated within the controller based on turbine speed and other relevant parameters. This calculation is essential for accurately detecting overspeed conditions and initiating appropriate safety measures.
- Signal Transmission: The signal is then transmitted to the VTUR (Variable Turbine Speed Control Unit), which serves as a central hub for coordinating trip signals and interfacing with trip terminal boards.
Primary Trip Terminal Board Operation
- Terminal Boards: The chosen primary trip terminal board, referred to as TRPx, interfaces with the electrical trip devices (ETD) responsible for activating primary trip solenoids. TRPx contains relays specifically designed for this interface, ensuring reliable and efficient operation.
- Emergency Trip Functionality: Typically works in conjunction with an emergency trip board (TREG) to manage both primary and emergency trip functions. This dual functionality ensures comprehensive protection against turbine malfunctions or emergencies.
- ETD Interface: PTUR (Primary Trip Unit Relay) supports up to three electrical trip devices (ETDs) driven from each TRPx/TREx combination, allowing for flexible configuration and scalability in managing trip solenoids.
Supported Trip Boards by VTUR
- TRPG for Gas Turbine Applications: TRPG is tailored for gas turbine applications and works alongside TREG for emergency trip functionality. This combination provides robust protection against potential hazards in gas turbine operations.
- TRPS for Steam Turbine Systems: TRPS is designed for small and medium-sized steam turbine systems and is controlled by the PTUR I/O pack. It offers specialized trip functionalities tailored to the requirements of steam turbine applications.
- TRPL for Large Steam Turbine Systems: TRPL is intended for large steam turbine systems and is also controlled by the PTUR I/O pack. It offers enhanced capabilities suitable for managing the complex trip requirements of large-scale steam turbine operations.
- Future Development: Additional trip boards are under development to cater to specific applications, reflecting ongoing efforts to enhance the versatility and adaptability of turbine control systems.
Supportive Functions Provided by VTUR
- Discrete Inputs Monitoring: VTUR provides various discrete inputs used to monitor critical signals such as trip relay position, synchronizing relay coil drive, and ETD power status. These inputs enable real-time monitoring and feedback, enhancing the overall safety and reliability of turbine operations.
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 IS200VTURH1BAC?
It is a Turbine Specific Primary Trip Board developed by GE under the Mark VI series.
What is the primary overspeed trip, and how is it initiated?
The primary overspeed trip is a safety mechanism designed to prevent turbine speed from exceeding safe limits. It is initiated by the controller, which calculates the trip signal based on turbine speed and other parameters, then passes it to the VTUR for further processing.
What is the role of the primary trip terminal board?
The board interfaces with the electrical trip devices responsible for activating primary trip solenoids. It contains relays specifically designed for this purpose, ensuring reliable and efficient operation of the trip system.
How does the emergency trip functionality work?
The primary trip terminal board typically works in conjunction with an emergency trip board (TREG) to manage both primary and emergency trip functions. This dual functionality ensures comprehensive protection against turbine malfunctions or emergencies.
