Where the Emergency-Trip Wiring Lands: IS200TREGH1B

When a Mark VI turbine has to trip, the signal path runs through hard-wired field circuits, and the IS200TREGH1B is the terminal board where those circuits are landed and organized. Offered here as new-surplus, new-open stock, it is the 125 V dc emergency trip termination for the GE Speedtronic Mark VI protection system. This listing covers what the board is and how to identify it; the trip settings and test steps that govern the protective function stay with GE’s documentation and your plant procedures.

The Positive Side of the Trip Circuit

The board’s terminal blocks receive the plant’s emergency-stop wiring, the protection trip-interlock wiring, and the trip-solenoid connections. In the GE scheme the TREG supplies the positive side of the solenoid DC power while its partner board, the TRPG, supplies the negative side. The IS200TREGH1B itself is a passive termination and interconnection assembly — it routes and connects, but it does not decide. That distinction matters both for wiring the board correctly and for troubleshooting it later.

Companion Boards in the Protection Termination Set

The IS200TREGH1B does not work alone. In a Mark VI protection system it is coordinated by the VPRO emergency-trip/protection processor and pairs with the TPRO (turbine protection) and TRPG (primary trip) terminal boards. Cables with molded plugs connect the board to the protection module. On the newer Mark VIe platform the same board is managed by a PPRO I/O pack seated on the SPRO board. If you are sourcing more than one board in this group, the GE Speedtronic Turbine Control Boards collection lists related protection and control hardware.

Is the Terminal Board the Real Fault?

Because it is passive, the IS200TREGH1B is usually not the source of a trip-circuit problem. The diagnostics for the circuit are generated by the protection module, so start at the VPRO (or PPRO/SPRO) fault log. A hardware-incompatibility fault typically means an ID-device or revision mismatch at the JX1, JY1 or JZ1 connector, or a cable that needs reseating. Emergency-stop and interlock problems land at the board but usually live in the field wiring or contacts. Replace the board when it is physically damaged — cracked terminal blocks, corroded terminals, damaged connectors — and route anything involving the protective function through the GE procedure.

IS200TREGH1BEC: Reading the Number

Segment by segment: IS200 (Mark VI series), TREG (emergency-trip function), H1 (hardware group, 125 V dc), B (functional revision), and the closing EC on IS200TREGH1BEC (artwork revision). The H1B is the standard 125 V dc board; if your protection uses two TREG boards in a redundant layout, confirm whether the position instead calls for a dedicated H3B, H4B or H5B variant. The GE Speedtronic Part Number Decoder walks through each field.

Deferring the Protective Details to GE

This board is part of the emergency-trip path, so we keep our content to identification and sourcing. Trip setpoints, the voting arrangement, and online or offline test procedures are documented in GEH-6421 (Mark VI System Guide) and in your plant’s written protection procedures, which must govern any work on the circuit. For lineage questions across control generations, the Mark V vs Mark VI: DS200 to IS200 guide is a useful reference.

New-Open Unit: How to Get a Quote

This IS200TREGH1B is new-surplus stock from an opened box, warranted as shown below. To quote it, send the full part number (IS200TREGH1BEC), the label revision and a photo, your turbine model and Mark VI generation, the protection configuration, the quantity, and your timeline. We ship worldwide DDP, respond within 24 hours, and accept purchase orders from qualified buyers — just choose Request a Quote.

IS200TREGH1BEC New-Surplus Reference

General Information about the Product
Part Number	IS200TREGH1B Mark VI IS200
Description	IS200TREGH1BEC by GE General Electric IS200TREGH1B Emergency Trip Board New Open
Condition	newSurplusNoBox Cleaned and Tested. With 1 Year Warranty.