GE IS200TREGH1B Turbine Emergency Termination Board

Technical Specifications

• Manufacturer: General Electric (GE)
• Model: IS200TREGH1B
• Series: Mark VI Speedtronic Turbine Control System
• Board Type: Emergency Trip Termination & Relay Output Board
• Trip Solenoid Support: 3 independent trip solenoids (controls positive DC power side)
• Termination Channels: 6 isolated termination channels
• Relay Configuration: 12 industrial relays (9 voting relays in 3 groups of 3; 3 control relays)
• Input Signals: 3-channel trip input (2-out-of-3 voting logic)
• Output Type: Form C dry contact relay outputs
• Rated Load: 5A per channel @ 30VDC or 120VAC
• Power Supply: 200–250VAC (47–63Hz); 125VDC nominal for solenoid circuits
• Isolation: 12 on-board isolation transformers; optically isolated relay channels
• Terminals: 48 high-density screw terminals for field wiring
• LED Indicators: Status LEDs for relay action, power, and fault feedback
• Operating Temperature: 0°C to +70°C (32°F to 158°F)
• Storage Temperature: -40°C to +70°C (-40°F to 158°F)
• Dimensions (W×D): 17.8 cm × 33.02 cm (7.0 in × 13.0 in)
• Weight: 0.91 kg (2.0 lbs)
• Certifications: CE, UL, IEC 61508 SIL 3 (functional safety)
• Compatibility: IS200TPROH1B, IS200VPROH1B motherboards; Mark VI PPRO/YTUR modules

Key Features

1. Redundant 2-out-of-3 Voting Logic
   • Implements triple redundant relay groups to validate trip signals, eliminating single-point failures and ensuring trip accuracy.
   • Triggers shutdown only when 2/3 inputs confirm a fault, preventing false trips while maintaining maximum safety.
2. High-Speed Emergency Shutdown
   • Delivers instantaneous relay response to activate trip solenoids, fuel shut-off valves, and circuit breakers within milliseconds during overspeed, overpressure, or fire events.
   • Dedicated power isolation for trip circuits ensures uninterrupted operation even if auxiliary power fails.
3. Robust Isolation & Noise Immunity
   • 12 on-board isolation transformers and optical isolation eliminate ground potential interference and electrical noise from high-voltage turbine circuits.
   • Protects both the Mark VI controller and field devices from voltage spikes and short circuits.
4. Industrial-Grade Durability
   • Heavy-duty PCB with conformal coating resists dust, moisture, vibration, and extreme temperatures in harsh turbine control rooms.
   • Sealed screw terminals and rugged relays ensure reliable connections for years of continuous operation.
5. Seamless Mark VI Integration
   • Directly interfaces with Mark VI I/O controllers, PPRO/YTUR protection modules, and TRPG negative power boards for complete trip circuit control.
   • LED status indicators provide real-time visibility of relay states, power, and faults for quick diagnostics.

Application Scenarios

• Power Generation Plants
  • Gas Turbine Power Plants: Controls emergency shutdowns for GE heavy-duty gas turbines (e.g., 7FA, 9FA) during overspeed, combustion faults, or system trips.
  • Steam Turbine Power Plants: Interfaces with trip solenoids for boiler steam pressure control, overspeed protection, and emergency stop in thermal power stations.
  • Combined-Cycle Plants: Integrates with Mark VI systems for coordinated gas/steam turbine safety logic and fault shutdowns.
• Oil & Gas Industry
  • Gas Compression Stations: Protects industrial gas turbines driving compressors from overspeed and mechanical faults via emergency trip circuits.
  • Refineries & Petrochemical Plants: Controls turbine-driven pumps, blowers, and generators, ensuring safe shutdowns during process upsets or fire hazards.
• Industrial Process Control
  • Chemical Plants: Safeguards turbine-driven mixers, reactors, and processing equipment from overpressure, overheating, and mechanical failure.
  • Pulp & Paper Mills: Protects steam turbines powering paper machines and boilers with reliable emergency trip and safety shutdown capabilities.