Factory-Packaged IS200TREGH5B Emergency Trip Board

Offered here in its original factory packaging as new-surplus stock, this IS200TREGH5B is a GE Mark VI turbine emergency trip terminal board — a strong candidate for a shelf spare in a plant that runs redundant protection. Before you commit a spare to a fault you are chasing, though, it is worth confirming that the terminal board is really the problem, because on the emergency-trip circuit the board is rarely where the fault begins. This page is deliberately limited to identification and diagnostics; trip settings and test procedures remain with GE’s documentation and your site’s procedures.

Confirm the Fault Is the Board, Not the Protection Pack

The TREG is a passive termination and interconnection board: it carries no logic, and it does not generate its own diagnostics. When a trip-circuit problem appears, work through the likely sources before condemning the board:

• The protection module. The VPRO processor (Mark VI) or the PPRO pack on SPRO (Mark VIe) produces the trip-circuit diagnostics. Read its fault log first; a driver or feedback fault reported there is about the module and circuit, not the terminal board.
• The connectors and ID devices. A hardware-incompatibility fault usually means an ID-device or revision mismatch at the JX1, JY1 or JZ1 plug, or a marginal cable — reseat and verify before replacing hardware.
• The field side. The emergency-stop string, interlock contacts and solenoid wiring terminate at the board but can fail out in the field.

A terminal board earns replacement when it is physically damaged — cracked terminal blocks, corroded or scorched terminals, or a broken connector. Everything else in the trip path is governed by the GE manual and the plant procedure.

What This TREG Terminal Board Actually Does

The IS200TREGH5B lands the emergency-trip field wiring — emergency stop, protection trip interlocks and the trip-solenoid connections — and supplies the positive side of the solenoid DC power, paired with the TRPG board on the negative side. It connects to the protection processor through molded-plug cables. It is one member of the emergency-trip termination group that also includes the TPRO and TRPG boards, all coordinated by the VPRO protection module.

H5B in a Two-Board Protection Layout

The H5 group identifies a redundant-TREG variant. Where two TREG boards share a protection layout, the H3B, H4B and H5B variants each take their feedback and economizing-circuit power from one dedicated connector to keep control power separated; the H5B is the JZ1-fed member of that set. GE calls for the correct variant to be used when a board is repaired or replaced so the separation is preserved, which is why an H5B slot should be filled only with an H5B board — not an H1B, H3B or H4B.

Part-Number Fields on IS200TREGH5BDC

IS200 marks the Mark VI series, TREG the emergency-trip function, H5 the redundant-TREG hardware group, B the functional revision, and DC the artwork revision on the full IS200TREGH5BDC. Match the entire string to your installation. The GE Speedtronic Part Number Decoder and the Mark V vs Mark VI: DS200 to IS200 guide help place the board within the wider GE lineage.

Safety Boundaries: Where Our Content Stops

We identify and supply emergency-trip hardware; we do not publish trip setpoints, the voting scheme, or online and offline test sequences. Those are the province of GEH-6421 (Mark VI System Guide) and your plant’s protection procedures, which must govern any work on the trip circuit. Related items are in the GE Speedtronic Turbine Control Boards collection.

Requesting This New-Surplus IS200TREGH5B

To quote this factory-packaged unit, send the full part number (IS200TREGH5BDC), the label revision and a photo, your turbine model and control generation, the redundant-protection configuration, the quantity, and your timeline. We ship worldwide on DDP terms, respond within 24 hours, and accept purchase orders from qualified buyers. Choose Request a Quote to begin.

IS200TREGH5BDC Factory-Package Reference

General Information about the Product
Part Number	IS200TREGH5B Mark VI IS200
Description	GE IS200TREGH5B IS200TREGH5BDC Gas Turbine Emergency Trip board Mark VI NEW
Condition	newSurplusFactoryPackage Original Factory Packaged. With 1 Year Warranty.