SPECIFICATIONS
Part No.: IS200TREGH1BC
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 17.8 cm wide x 33.02 cm, high
Temperature: -30 to +65oC
Trip interlock isolation Optical: 1500 V
Trip interlock filter: Hardware filter, 4 ms
Product Type: Emergency Trip Terminal Board
Availability: In Stock
Series: Mark VIe
Functional Description
IS200TREGH1BC is an Emergency Trip Terminal Board developed by GE. It is part of the Mark VIe series. TREG plays a critical role in providing power to the emergency trip solenoids while being under the control of the I/O (Input/Output) controller. This component is designed to manage and support emergency functionalities within the system.
Features
- Power Distribution to Emergency Trip Solenoids: TREG serves as the power source for three emergency trip solenoids, supplying the positive side of the DC power needed to operate these solenoids. These solenoids are responsible for executing emergency trip functions in response to specific signals or conditions.
- Connection Between TREG and TRPG Terminal Boards: Up to three trip solenoids can be linked between the TREG and TRPG (Turbine Relay Power Governor) terminal boards. While TREG provides the positive side of the DC power, the TRPG terminal board serves as the provider of the negative side for these solenoids. This setup ensures proper polarity and power supply for the solenoids' operation.
- Controlled by the I/O Controller: The I/O controller assumes the responsibility of managing the TREG's operations and functionalities. It oversees and regulates the emergency overspeed protection, which guards against turbine overspeeding, as well as the emergency stop functions critical for stopping turbine operations in case of emergencies.
- Relay Control: Comprises 12 relays, with nine of them forming three groups of three relays each. These grouped relays function as a voting system to control inputs responsible for managing the three trip solenoids. This voting mechanism ensures redundancy and reliability in the trip-solenoid control system.
- Emergency Protection and Control: The I/O controller's oversight extends to the 12 relays on the board. These relays, through their voting configuration, are instrumental in executing emergency trip functions under the controller's command. They enable the I/O controller to manage emergency stop functionalities effectively.
- Safety-Critical Functions: The emergency trip solenoids and associated control systems are crucial safety components within the turbine system. They are responsible for implementing emergency shutdowns or interventions in critical situations to ensure the safety of the turbine and associated systems.
Solenoid trip test
- The application software within the controller allows for online testing of the trip solenoids. These tests enable the manual tripping of each trip solenoid individually. There are two ways to initiate these tests-
- PTR Relay Control: The controller can trigger the tripping of trip solenoids via PTR (Primary Trip Relay) relays.
- ETR Relay Control: Alternatively, the protection module can activate the tripping of trip solenoids through ETR (Emergency Trip Relay) relays.
Contact from each solenoid circuit is wired back as a contact input, providing positive indication that the solenoid has been tripped. This feedback mechanism ensures that the solenoid trip action has been executed as intended.
- Offline Overspeed Tests: The solenoid trip tests also include primary and emergency offline overspeed tests. These tests are specifically designed to verify the actual trips due to simulated overspeed conditions initiated by the software.
- The primary offline overspeed test simulates an overspeed condition offline (not during normal operation) to verify the responsiveness and accuracy of the trip solenoids. Similarly, the emergency offline overspeed test replicates an emergency overspeed condition to validate the system's ability to trigger solenoid trips under emergency scenarios.
- Purpose of Solenoid Trip Tests: The primary objective of these tests is to verify and validate the functionality and responsiveness of the trip solenoids in executing emergency shutdowns or interventions when triggered by either software commands or simulated overspeed conditions.
- Safety Validation and Verification: Conducting these solenoid trip tests is critical for ensuring the reliability and effectiveness of the safety measures within the turbine system. They provide an essential layer of validation to guarantee that the solenoids perform as intended during critical scenarios, such as overspeed situations or emergency shutdown requirements.
The WOC team is always available to help you with your Mark VIe requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200TREGH1BC?
It is an emergency trip terminal board developed by GE under the Mark VIe series.
What is the primary function of the board within the turbine system?
It is primarily responsible for providing power to and controlling the operation of emergency trip solenoids, crucial components that facilitate emergency shutdowns in the turbine system.
How is the TREG controlled and managed within the system?
The operation and functionalities are entirely under the control of the I/O (Input/Output) controller. It responds to commands and instructions from the I/O controller for its functioning.
