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Product Overview
The GE IS200TREGH1B is a Turbine Emergency Trip Terminal Board used in GE Mark VI Speedtronic gas turbine control systems. Its primary role is to interface the turbine protection system with emergency trip solenoids, supporting functions such as emergency shutdown and overspeed protection. The board can control three emergency trip solenoids and contains 12 relays, with nine arranged in three voting groups associated with the three solenoids. It works with the TRPG terminal board, which provides the negative side of the solenoid DC circuit while the TREG board provides the positive side. In typical 125 VDC applications, the H1B version is a commonly referenced configuration.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | IS200TREGH1B |
| Manufacturer | GE / General Electric |
| Product Type | Turbine Emergency Trip Terminal Board |
| System | Mark VI Speedtronic |
| Trip Solenoids | 3 |
| Relays | 12 total; 9 arranged in three voting groups |
| Solenoid Power | Positive DC side |
| Typical Application | Gas turbine emergency trip and protection |
| Control Power | 28 VDC control power |
| Solenoid Supply | Typically 125 VDC application |
| Communication / Protocol | Hardwired interface to Mark VI protection/control electronics |
| Mounting | Mark VI control cabinet / terminal-board installation |
| Dimensions (HxWxD) | Approx. 17.8 × 33.0 cm footprint; verify enclosure-specific dimensions |
| Weight | Approx. 0.9 kg reference shipping weight |
| Typical Interfaces | JX1, JY1, JZ1 and molded-plug connections |
| Compliance | GE Mark VI system requirements; verify site-specific safety approvals |
The published weight and dimensions vary between suppliers and may represent either the bare board or packaged unit, so they should be treated as procurement references rather than certified mechanical drawings.
GE IS200TREGH1B
Key Features and Benefits
- Supports emergency trip control for three turbine trip solenoids.
- Uses relay voting architecture to support turbine protection logic.
- Designed for integration with GE Mark VI protection and control hardware.
- Provides the positive DC side of the emergency trip solenoid circuits.
- Interfaces with the TRPG board for complete trip-solenoid circuit functionality.
- Diode-combined control-power connections provide redundancy for selected board functions in the H1B configuration.
Personally, I would treat this board as a protection-system spare, not simply a standard terminal board. Correct revision and circuit compatibility are critical because an incorrect replacement can affect the turbine trip architecture.
Related Models
IS200TRPGH1B — Related trip-primary terminal board that works with TREG to complete the emergency solenoid power circuit.
IS215VPROH1B — Mark VI VPRO protection module associated with TREG control and diagnostic functions.
IS200TREAH1A — Mark VIe emergency trip/protection board used in related turbine protection applications.
IS200TREGH1BDB — Related TREG assembly designation associated with the same basic ordering reference.
Installation and Maintenance
Before replacing the board, verify the complete ordering code, revision, terminal-board configuration, and associated VPRO/TRPG hardware. Inspect connectors, relay circuitry, field wiring, and DC supply circuits for signs of overheating or insulation damage.
Because this board participates in the turbine emergency-trip circuit, maintenance should follow the plant’s approved shutdown, isolation, and functional-test procedures. After replacement, verify wiring and protection logic before returning the turbine control system to service.
Product Warranty
Warranty terms depend on supplier, stock condition, and purchase agreement. Confirm whether the unit is new, unused original stock, refurbished, or tested surplus, and request the applicable test report and warranty period before purchase.
The GE IS200TREGH1B is best maintained as a controlled critical spare for Mark VI turbine protection systems where emergency trip availability and exact hardware compatibility are essential.
