1. Product Overview

• Model: IS200TREGH1BEC

• Brand: General Electric (GE)

• Series: Speedtronic Mark VI Gas Turbine Control System

• Type: Turbine Emergency Terminal Board – A core safety control component for emergency shutdown and overspeed protection in gas turbine systems.

• Core Purpose: Critical interface board in the Mark VI Emergency Trip System (ETS), responsible for driving 3 emergency trip solenoids to achieve fast, reliable turbine shutdown during faults, protecting equipment and personnel.

2. Core Functions

1. Emergency Trip Solenoid Drive: Integrates 12 relays (9 arranged in 3 groups of 3 for 2-out-of-3 voting logic) to directly drive 3 emergency trip solenoids (TREG supplies positive DC power, TRPG supplies negative DC power) for rapid shutdown on overspeed, overtemperature, vibration and other faults.

2. Redundant Power & Isolation: Three control power inputs (JX1/JY1/JZ1) are diode-combined for redundancy to power status feedback and economizing relays; electrical isolation is maintained in trip relay circuits for enhanced anti-interference and safety.

3. Voting Logic Control: 2-out-of-3 voting inputs managed by the I/O controller to ensure accurate trip commands, preventing false or missed trips; compatible with simplex, dual and triple redundant control systems.

4. Terminal Wiring & Signal Routing: Dual 48-pin terminal blocks (2×24) for direct connection to trip solenoids, economizing resistors, emergency stop buttons and up to 7 trip interlock signals; connects to PPRO module and TSVO terminal board via dedicated cables.

5. Status Feedback & Diagnostics: Provides loop status feedback and supports system self-diagnostics for easy fault location and maintenance.

3. Key Specifications

• Power: Control supply 200–250VAC; Trip bus voltage 70–145VDC (125VDC typical).

• Relay Configuration: 12 relays total, 9 for 3 sets of 2-out-of-3 trip control, 3 for auxiliary control.

• Interfaces: 48-pin terminal block (2×24), JX1/JY1/JZ1 power connectors, J1/J2 system connection ports.

• Physical: Dimensions 17.8cm × 33.02cm, weight approx. 2.0 lbs (0.91kg), multi-layer PCB with SMD components.

• Environment: Operating temperature 0°C to 70°C, humidity 5%–95% non-condensing, IP20 protection, industrial-grade EMC design.

• Manual: GEH-6421 (Mark VI System Technical Manual).

4. Key Features & Benefits

• High Safety & Reliability: 2-out-of-3 voting, redundant power, electrical isolation design, meeting turbine safety standards to eliminate false/missed trips.

• Fast Response: Direct relay-to-solenoid drive with millisecond-level actuation for rapid emergency shutdown.

• Strong Compatibility: Works with Mark VI simplex, dual and triple redundant architectures, and coordinates with TRPG, PPRO, TSVO boards.

• Industrial Durability: Wide temperature range, vibration resistance, EMI immunity, suitable for long-term continuous operation in power plants.

5. Typical Applications

• Gas/Steam/Combined-Cycle Power Plants: Emergency Trip System (ETS), overspeed protection, shutdown interlock control.

• Mark VI Control Systems: Safety I/O interface, trip solenoid drive, emergency shutdown loop signal distribution.

• Petrochemical, Industrial Compressors: Emergency safety protection for rotating machinery, fault interlock shutdown.