GE IS200TREGH1BEC IS200TREGH1B | Emergency Trip Board

Core Function and System Role

The GE IS200TREGH1BEC provides emergency turbine trip functionality for Mark VI systems. Specifically, this board drives three critical trip solenoids simultaneously. Moreover, it implements redundant voting logic for fail-safe operation. The IS200TREGH1B variant includes standard relay outputs for auxiliary trip circuits.

Technical Specifications Overview

This emergency trip board features three independent trip solenoid drivers. Each channel uses a 2oo3 (two out of three) voting architecture. Furthermore, the board accepts 125 Vdc coil power for direct solenoid actuation.

Parameter	Specification
Part Number	IS200TREGH1BEC / IS200TREGH1B
Type	Emergency Trip Board / Turbine Protection Module
Trip Solenoid Drivers	3 Channels
Voting Architecture	2oo3 (Hardware-Based)
Coil Voltage	125 Vdc Nominal
Coil Current	1 A per Channel
Response Time	<10 ms
Auxiliary Relay Outputs	3 Channels, Form C
Status Indicators	6 LEDs (Power, Trip, Fault)
Power Supply	24 Vdc ±15% (Logic)
Connector Types	2 x 50-pin D-sub, 1 x Terminal Block
Dimensions (W x H x D)	210 x 120 x 32 mm
Weight	0.75 kg
Onboard Energy Storage	6 x 470 µF, 160V Capacitors

Connector Layout and Component Count

The board uses one terminal block for 125 Vdc coil power. For instance, terminals TB1-1 and TB1-2 supply voltage to the solenoids. Meanwhile, two 50-pin D-sub connectors interface with the main controller. The IS200TREGH1BEC adds six suppression diodes for inductive kickback protection.

Energy Storage and Trip Reliability

This trip board includes local capacitance for hold-up during power sags. Specifically, six 470 µF capacitors store energy for solenoid actuation. Therefore, the board maintains trip capability even during brief power interruptions. Additionally, onboard LED indicators show system status. For example, a green LED confirms proper logic power. Red LEDs illuminate when the board initiates a trip condition.

Diagnostic Features and Self-Checking

The board continuously performs self-diagnostics on all trip circuits. Consequently, it detects stuck solenoids or wiring faults within 100 milliseconds. Moreover, the GE IS200TREGH1BEC IS200TREGH1B includes a hardware watchdog timer. This feature verifies that the controller remains operational. An onboard fault relay signals any internal failure to the protection system.

Maintenance and Hot Replacement

You can replace this trip board without shutting down the turbine. Thus, mean time to repair remains under fifteen minutes. The board stores all trip parameters in non-volatile memory. Therefore, you do not need reprogramming after a simple board swap.

Industrial Applications

This emergency trip board works inside GE Mark VI protection panels. For reliable GE turbine protection, the IS200TREGH1BEC and IS200TREGH1B deliver exceptional safety performance. They provide critical overspeed and over-temperature tripping for steam and gas turbines.