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Is210tresh2a

IS210TRESH2A - Turbine Emergency Trip Board

IS210TRESH2A - Turbine Emergency Trip Board IS210TRESH2A - Turbine Emergency Trip Board

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SPECIFICATIONS

Part No.: IS210TRESH2A
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 17.8 cm wide x 33.02 cm high
Technology: Surface-mount
Temperature Operating: -30 to 65oC
Product Type: Turbine Emergency Trip Board
Availability: In Stock
Series: Mark VI

Functional Description

IS210TRESH2A is a Turbine Emergency Trip Board developed by GE. It is a part of Mark VI control system. The system is designed to provide emergency overspeed protection for small to medium-sized steam turbines. It plays a crucial role in ensuring the safety and reliability of turbine operations by executing emergency shutdowns in critical situations.

Features

  • Emergency Overspeed Protection: The primary function is to protect steam turbines from overspeed conditions. If the turbine exceeds its safe operational speed, activate emergency shutdown procedures to prevent damage or catastrophic failure.
  • Control by I/O Controller: It is controlled by an I/O controller that manages its various functions. The I/O controller is responsible for providing emergency overspeed protection, activating emergency stop functions, and controlling the three relays on the board that, in turn, manage the emergency trip solenoids.
  • Power Supply to Solenoids: TRES provides the positive side of the 125 V DC power supply to the three emergency trip solenoids. The negative side of the power supply is provided by the terminal boards. This configuration allows TRES to control the solenoids that are essential for executing the emergency shutdown.

Configuration

  • Form Variants: Available in both simplex and Triple Modular Redundant (TMR) forms. The simplex form is suitable for standard applications, while the TMR form provides enhanced reliability and fault tolerance for critical operations.
  • Dry Contact Inputs: Includes seven dry contact inputs that are used for trip interlocks. These inputs are essential for ensuring that the system responds correctly to various interlock conditions and maintains safe operational parameters.
  • Lack of Economizing and Emergency Stop Inputs: Does not feature economizing relays, which are typically used for optimizing operational efficiency. Additionally, it does not have dedicated emergency stop inputs, focusing instead on emergency overspeed protection through the trip solenoids.

Monitoring and Relays

  • Excitation and Signal Monitoring: The seven dry contact inputs are monitored and interfaced with the I/O controller. This ensures that all interlock conditions are accurately detected and managed by the system.
  • Synch Check Relay Driver: TRES includes the synch check relay driver (K25A) and its associated monitoring. This component is responsible for checking the synchronization of the turbine with the grid or other power sources, similar to the functionality provided by the TREG system.
  • Servo Clamp Relay Driver: The system also features the servo clamp relay driver (K4CL) and its associated monitoring. This relay driver is crucial for controlling the servo mechanisms involved in the emergency shutdown process.
  • No Secondary Board Connection: It is important to note that a second board cannot be driven from the I/O controller through the J4 connector. This limitation ensures that the system operates as designed without the complication of additional boards.

Installation

  • The three trip solenoids are wired to the first I/O terminal block. Up to seven trip interlocks are wired to the second terminal block.
  • The wiring connections are shown in the following figure. Connector J2 carries three power buses from TRPS, and JH1 carries the excitation voltage for the seven-trip interlocks.

Operation

  • The VSVO protection module controls TRES. In simplex systems, a third cable carries a trip signal from J1 to the TSVO terminal board, providing a servo valve clamp function upon turbine trip.
  • Both TREL and TRES control the trip solenoids 1 and 2 so that either one can remove the power and actuate the hydraulics to close the steam or fuel valves. ETR3 is set up to supply power to trip solenoid 3. The nine trip relay coils on TRES are supplied with 28 V dc from the I/O controller.
  • The trip solenoids are supplied with 125 V dc (or 24 V dc) through plug J2 and draw up to 1 A with a 0.1 second L/R time constant. 

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 IS210TRESH2A?
It is a turbine emergency trip board developed by GE under the Mark VI series.

How do I connect the trip interlocks?
Up to seven trip interlocks are wired to the second I/O terminal block on the TRES board. This block handles the connections for the trip interlocks, which are important for ensuring proper system response to various interlock conditions.

What is the function of Connector J2?
Connector J2 carries three power buses from the TRPS. It provides the necessary power supply to the system, ensuring it operates correctly during an emergency situation.

What does Connector JH1 do?
Connector JH1 supplies the excitation voltage needed for the seven trip interlocks. This connection is essential for the proper functioning of the interlocks, ensuring that they respond accurately to the system's conditions.