IS200TRESH1ABB - Turbine Emergency Trip Terminal Board

SPECIFICATIONS

Part Number: IS200TRESH1ABB
Manufacturer: General Electric
Country of Manufacture: United States (USA)
Number of trip solenoids: Three solenoids
Trip interlock isolation: Optical isolation to 1500 V on all inputs
Trip interlock filter: Hardware filter, 4 ms
Trip interlock ac voltage rejection: 60 V rms
Size: 17.8 cm wide x 33.02 cm high
Series: Mark VIe
Function: Turbine Emergency Trip Terminal Board

Functional Description

IS200TRESH1ABB is a Turbine Emergency Trip Terminal Board developed by GE. It is part of the GE Speedtronic Mark VIe gas turbine control system. The TRES terminal board works in conjunction with the VPRO (Protection Module) to provide fast-acting emergency shutdown functionality. It delivers power to three emergency trip solenoids, ensuring rapid and reliable actuation in the event of a critical fault condition such as overspeed.

Features

• TRES supplies the positive side (+125 VDC) of the power to the solenoids, while the TRPS terminal board provides the negative return path.
• The VPRO module controls the three onboard relays in the TRES, which in turn actuate the connected trip solenoids to shut down the turbine.
• Simplex and TMR (Triple Modular Redundancy) Versions: Suitable for both basic and high-reliability system architectures.
• Seven Dry Contact Inputs: Used for monitoring trip interlock conditions. These inputs are excited, monitored, and relayed (fanned) to the protection module for processing.
• Integrated Relay Drivers:
  • K25A (Synch Check Relay Driver) – Ensures the turbine only connects to the grid under safe synchronization conditions.
  • K4CL (Servo Clamp Relay Driver) – Controls the servo clamp and ensures secure actuator positioning during faults.
• No Economizing Relays: Unlike some trip boards, TRES does not include internal economizing circuits, simplifying its design.
• No Emergency Stop Inputs: Emergency stop signals are managed elsewhere in the system (e.g., through the VPRO module).
• No Dual-TRES Configuration: Only one TRES board can be connected per protection module; it cannot be paralleled with another.

Installation Guidelines

Terminal Block Wiring

• Trip Solenoids: The three emergency trip solenoids are connected to the first I/O terminal block on the TRES board. These solenoids are energized by the board under normal operation and are de-energized during a trip event, thereby triggering a mechanical shutdown of the turbine.
• Trip Interlocks: Up to seven dry contact trip interlocks can be connected to the second terminal block. These inputs monitor critical safety conditions such as high bearing temperature, low oil pressure, and other system alarms. If any of these interlocks are triggered (opened or closed based on configuration), they will initiate an emergency trip through the VPRO protection module.

Connector Interfaces

• Connector J2: This connector is used to carry three power buses from the TRPS terminal board to the TRES. These buses provide the necessary power for energizing the trip solenoids and operating the internal relay circuits of the TRES board.
• Connector JH1: This connector supplies the excitation voltage required for the seven dry contact trip interlocks. The excitation ensures that the status of each interlock can be reliably detected and communicated to the VPRO protection module.

Installation Notes

• Always follow GE’s recommended wiring practices, including grounding and shielding, to avoid electrical noise or faults.
• Ensure the 125 V DC supply is stable and within tolerance for reliable solenoid actuation.
• Do not attempt to connect multiple TRES boards to a single protection module; the system does not support this configuration.
• Perform continuity and insulation checks on wiring before energizing the system.

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FREQUENTLY ASKED QUESTIONS

What is IS200TRESH1ABB?
It is a Turbine Emergency Trip Terminal Board and is part of the GE Speedtronic Mark VIe gas turbine control system.

Which module controls the TRES board?
The TRES board is controlled by the VPRO protection module, which manages emergency overspeed protection, emergency stop signals, and operation of the trip solenoid relays on the board.

How many trip solenoids can the board support?
The board supports three trip solenoids, which are connected to the first I/O terminal block. These solenoids are energized under normal operation and de-energized to initiate a trip.

How are the trip interlocks connected?
Up to seven dry contact trip interlocks can be wired to the second terminal block. These inputs are monitored by the system to detect critical conditions that require an emergency shutdown.