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IS210TRELH1A

IS210TRELH1A - Steam Turbine Emergency Trip Board

IS210TRELH1A - Steam Turbine Emergency Trip Board IS210TRELH1A - Steam Turbine Emergency Trip Board

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SPECIFICATIONS

Part No.: IS210TRELH1A
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 17.8 cm wide x 33.02 cm high
Trip interlock filter: Hardware filter, 4 ms
Number of trip solenoids: 3
Technology: Surface-mount
Product Type: Steam Turbine Emergency Trip Board
Availability: In Stock
Series: Mark VIe

Functional Description

IS210TRELH1A is a Steam Turbine Emergency Trip Board developed by GE. It is a part of the Mark VIe system. The system is meticulously controlled by the I/O controller within the protection module. It plays a crucial role in ensuring the safe operation of the turbine by providing power to three emergency trip solenoids. These solenoids can be connected between the TREL and TRPL terminal boards, ensuring a robust and reliable protection mechanism.

Features

  • Power Supply: Supplies the positive side of the 125 V DC to the solenoids, while TRPL provides the negative side. This configuration ensures a stable and consistent power flow necessary for the reliable operation of the solenoids.
  • I/O Controller: The I/O controller is central to the functionality of TREL, offering emergency overspeed protection and emergency stop functions. It also manages the nine relays on TREL, organized into three groups of three. These groups are critical for voting inputs that control the three trip solenoids, enhancing the reliability and safety of the turbine's protection system.
  • Group Configuration: The three groups of relays are designated as ETR (Emergency Trip) 1, 2, and 3. Each group functions independently to provide a voting mechanism that ensures accurate and dependable control over the trip solenoids. This tripartite configuration is designed to offer a fail-safe operation, minimizing the risk of overspeed and potential turbine damage.
  • Installation
  • Wiring and Terminal Blocks: The installation of the TREL system for emergency overspeed protection involves precise wiring configurations to ensure effective functionality.
  • Trip Solenoids Connection: The three trip solenoids are wired to the first I/O terminal block. This terminal block is crucial as it facilitates the direct connection and control of the trip solenoids by the TREL system.
  • Trip Interlocks Connection: Up to seven trip interlocks are wired to the second terminal block. These trip interlocks are essential safety features that provide additional layers of protection by ensuring that all necessary conditions are met before the turbine can operate.
  • Wiring Connections: The wiring connections for the TREL system are organized to ensure clear and efficient communication between the components. These connections are detailed in the accompanying figure (not provided here but typically included in the installation manual). 
  • Connector J2: This connector carries three power buses from TRPL, which are vital for providing the necessary power to the system. The three power buses ensure a stable and reliable power supply to the connected components.
  • Connector JH1: JH1 is responsible for carrying the excitation voltage for the seven-trip interlocks. This voltage is necessary to activate and maintain the interlocks, ensuring they function correctly as part of the safety system.

Operation

  • I/O Controller Control: TREL is fully controlled by the I/O controller, which oversees its functions and ensures that the system responds appropriately to any emergency situations. The I/O controller's role is vital for the precise management of the TREL system.
  • Power and Trip Solenoid Connections: The primary connections to the turbine control system include the J2 power cable and the trip solenoids. The J2 power cable is essential for delivering the necessary power from TRPL to TREL, while the trip solenoids are crucial for initiating emergency shutdowns when required.
  • Simplex System Configuration: In simplex systems, an additional cable plays a pivotal role in enhancing the safety functions:
  • Third Cable Connection: A third cable carries a trip signal from J1 to the TSVO terminal board. This connection is crucial for providing a servo valve clamp function upon turbine trip. The servo valve clamp function ensures that the turbine is securely and rapidly shut down in case of an emergency, preventing potential damage or hazardous situations. 

The WOC team can always help you with your Mark VIe requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS210TRELH1A?
It is a steam turbine emergency trip board developed by GE under the Mark VIe series.

What role does the I/O controller play in the system?
The I/O controller is responsible for overseeing the entire operation of the system. It manages the power supply, monitors the trip solenoids, and ensures that the system responds correctly to any emergency conditions.

What is the significance of the J2 power cable?
The J2 power cable is crucial as it supplies the necessary power from TRPL to the TREL system. Without this power supply, the TREL system would not be able to function properly.

Why are trip solenoids important in the system?
Trip solenoids are vital components that initiate emergency shutdowns when required. They act as a trigger for the TEL system to engage its protection mechanisms, ensuring the turbine is safely shut down during overspeed conditions or other emergencies.