IS230TREAH2A - Turbine Emergency Trip Terminal Board

SPECIFICATIONS

Part No.: IS230TREAH2A
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
MPU pulse rate range: 2 Hz to 20 kHz
MPU pulse rate accuracy: 0.05 percent
Contact ratings: NEMA class F
Product Type: Turbine Emergency Trip Terminal Board
Availability: In Stock
Series: Mark VIe

Functional Description

IS230TREAH2A is a Turbine Emergency Trip Terminal Board developed by GE. It is part of the Mark VIe control system. The Aero Derivative Turbine Emergency Trip (TREA) terminal board, when combined with the WREA option card, functions as an essential part of the Mark VIe system. This setup works with PPRA turbine I/O packs to manage emergency trip operations effectively.

Input and Output Configurations

• Input Terminals provided through two 24-point pluggable barrier terminal blocks (H1A or S1A) or 48 pluggable Euro-style box terminals (H3A or S3A).
• Six fanned passive pulse rate devices can sense up to three shafts, each with two sensors. These sensors measure the turbine speed by detecting a toothed wheel.
• Three 24 V DC TREAH1A, H3A plus WREAH1A or TREAS1A, S3A plus WREAS1A TMR voted solid-state output contacts are utilized to trip the system.
• Four 24-125 V DC voltage detection circuits monitor the trip string to ensure proper operation.
• Four 24 V DC WREAH1A or WREAS1A contact inputs are available for additional hardware or conditional trip inputs. Wetting power is supplied through the JH1 connector on WREA.
• One speed repeater output for each of the six-speed inputs reproduces the speed pulse rate signals using an RS–232 or RS–422 transmitter.
• Operational Requirements
• The TREA and WREA setup requires three PPRA I/O packs for correct operation. These packs work together to manage and execute the emergency trip functions efficiently.

Voltage Monitors

The trip relays on the terminal board can be freely located anywhere within a trip string, providing flexibility in configuring the trip circuit. To facilitate this, it includes three general-purpose isolated voltage sensor inputs.

• General-Purpose Isolated Voltage Sensor Inputs: These inputs are designed to monitor various points within the trip system and relay the voltage status to the system controller, enabling the controller to take appropriate action based on the monitored voltages.
• Power Supply Voltage Monitoring (PWR): These sensors can monitor the power supply voltage for the two trip strings, ensuring that the power levels are within operational parameters.
• Solenoid Voltage Monitoring (SOL1, SOL2): They can also be used to monitor the solenoid voltage of the devices being driven by the relays. This ensures that the solenoids receive the correct voltage for proper operation. 

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 IS230TREAH2A?
It is a turbine emergency trip terminal board developed by GE under the Mark VIe series.

What is the purpose of the voltage monitors on the terminal board?
The voltage monitors on the board are designed to track various points within the trip system and relay the voltage status to the system controller. This allows the controller to take necessary actions based on the monitored voltages, ensuring the proper operation and safety of the turbine emergency trip mechanism.

Where can the trip relays be located within the trip string?
The trip relays on the terminal board can be freely located anywhere within a trip string. This flexibility allows for customized configuration of the trip circuit.

How many general-purpose isolated voltage sensor inputs does the TREA have?
The board includes three general-purpose isolated voltage sensor inputs.