IS200VTURH1A - Turbine Primary Trip Board

SPECIFICATIONS

Part No.: IS200VTURH1A
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 33.0 cm high x 17.8 cm wide
Technology: Surface mount
Temperature: -30 to 65oC
Product Type: Turbine Primary Trip Board
Availability: In Stock
Series: Mark VI

Functional Description

IS200VTURH1A is a turbine primary trip board developed by GE. It is a part of Mark VI control system. The turbine control board VTUR, is a multifunctional component essential for the safe and efficient operation of turbines. By overseeing turbine speed measurement, synchronization, electrical monitoring, flame detection, and overspeed trip control, VTUR plays a pivotal role in ensuring operational integrity and safety in turbine systems.

Turbine Speed Measurement and Overspeed Trip Generation

The VTUR board continuously measures turbine speed using four passive pulse rate devices, providing accurate real-time speed signals to the control system. These signals are processed to generate the primary overspeed trip signal, a critical safety mechanism. By ensuring that the turbine remains within defined speed limits, this feature prevents overspeed conditions that could otherwise cause mechanical damage, operational failures, or safety hazards.

Automatic Generator Synchronization and Main Breaker Closure

A key function of the VTUR board is the automatic synchronization of the generator. This process aligns the turbine’s electrical output with the grid voltage, frequency, and phase, ensuring smooth integration with the electrical network. Once synchronization is achieved, the VTUR board also closes the main breaker, allowing turbine-generated power to feed the grid seamlessly. This functionality not only stabilizes power distribution but also maximizes turbine efficiency and operational uptime.

Monitoring of Induced Shaft Voltage and Current

The VTUR board monitors induced shaft voltage and current, providing critical insight into the turbine’s electrical performance. Continuous monitoring of these parameters helps detect abnormal conditions, such as electrical imbalances or insulation issues, enabling proactive maintenance and minimizing the risk of operational disruptions or equipment damage.

Geiger-Muller Flame Detector Monitoring

For gas turbine applications, VTUR oversees eight Geiger-Muller flame detectors, which are connected via the TRPG terminal board and require an external supply of 335 V DC at 0.5 mA. By monitoring these flame detectors, VTUR enhances operational safety, detecting potential combustion anomalies and enabling rapid response to flame-related issues before they escalate into serious hazards.

Control of Primary Overspeed Trip Relays

The VTUR board manages three primary overspeed trip relays located on the terminal board. In the event of an overspeed scenario, VTUR generates the trip signal and transmits it to the TRPG terminal board, which activates the Electrical Trip Devices (ETD). This sequence ensures that turbine shutdown occurs swiftly and reliably, preventing catastrophic damage and maintaining system safety.

Cable Connections

• J3 Connector on VME Rack: Cable connections to the TTUR terminal boards are established at the J3 connector located on the lower portion of the VME rack. These connectors are of the latching type, designed to securely fasten the cables in place. Proper connection at J3 ensures reliable communication and data transfer between the terminal boards and the VME rack.
• J5 Connector on Front Panel of TTUR: For cable connection to the TTUR terminal boards themselves, utilize the J5 connector located on the front panel of the TTUR. This connector serves as the interface point for external cables, facilitating seamless integration with the terminal boards. Ensuring a secure and proper connection at J5 is crucial for the efficient operation of the TTUR terminal boards.
• J4 Connector for TRPG Cable: Additionally, a cable connection to the TRPG (Turbine Primary Trip) terminal board is established at the J4 connector. This connection point enables communication between the TTUR and TRPG components, facilitating coordinated functionality within the turbine control system.
• Power-Up and Diagnostic Check: Once all cable connections are securely established, power up the VME rack. As part of the startup procedure, it's essential to check the diagnostic lights located at the top of the front panel. These lights provide valuable feedback regarding the operational status of the system. For detailed instructions on interpreting diagnostic indicators, refer to the dedicated section on diagnostics within the documentation. 

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 IS200VTURH1A?
It is a Turbine Primary Trip Board developed by GE under the Mark VI series.

Where is the normal primary overspeed trip calculated?
The normal primary overspeed trip is calculated within the controller.

How is the overspeed trip signal transmitted?
Once calculated, the overspeed trip signal is transmitted to the VTUR (Turbine Control Board).

What is the role of TRPx terminal boards?
TRPx terminal boards contain relays designed for interfacing with Electrical Trip Devices (ETDs).

How do boards typically operate?
TRPx boards typically operate in conjunction with an emergency trip board (TREG) to establish both primary and emergency sides of the interface to the ETDs.

How many ETDs can PTUR support from each TRPx/TREx combination?
PTUR (Turbine Primary Trip) supports up to three ETDs driven from each TRPx/TREx combination.