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TECHNICAL SPECIFICATIONS:
Part Number: IS200TREGH3B
Manufacturer: General Electric
Series: Mark VI
Functional Acronym: TREG
Number of trip Solenoids: 3
Trip Solenoid Rating: H1 -125 V dc
Product Type: Gas Turbine Emergency Trip Terminal Board
Number of Trip Solenoids: Supports up to 3 emergency trip solenoids
Trip Solenoid / Contact Rating: 125 V DC nominal
Power Source Configuration: JX1 connector
Ambient Operating Temperature: -30 °C to +65 °C
Mounting Design: Surface-mount technology / DIN-rail mounting
Repair / Evaluation Lead Time: 3-7 Business Days
Trip Interlock Filter: 4 ms
Trip Interlock Ac Voltage: 60 V rms
Size: 17.8 cm x 33.02 cm
Availability: In Stock
Country of Origin: United States
Manual Reference: GEH-6421
The IS200TREGH3B is a Gas Turbine Emergency Trip Terminal Board designed and manufactured by General Electric for its primary Speedtronic turbine protection and control series. TREG provides power to three emergency trip solenoids and is controlled by the I/O controller. Up to three trip solenoids can be connected between the TREG and TRPG terminal boards. TREG provides the positive side of the de power to the solenoids, and TRPG provides the negative side. The I/O controller provides emergency overspeed protection, emergency stop functions, and controls the 12 relays on TREG, nine of which form three groups of three to vote inputs controlling the three trip solenoids. There are several board types as follows:
The HIA version is not used for new production and is replaced by HIB. HIB is the primary version for 125V DC applications. Control power from the JX1, JY1, and JZ1 connectors is combined to create redundant power on the board for status feedback circuits and powering the economizing relays. Power separation is maintained for the trip relay circuits.
CONTROL OF TRIP SOLENOIDS:
A separately fused 125 V dc feeder is provided from the turbine control for the solenoids, which energize in the run mode and de-energize in the trip mode. Diagnostics monitor each 125 V dc feeder from the power distribution module at its point of entry on the terminal board to verify the fuse integrity and the cable connection. Two series contacts from each emergency trip relay (ETR1, 2, 3) are connected to the positive 125 V dc feeder for each solenoid, and two series contacts from each primary trip relay (PTR1,2,3 in TRPG) are connected to the negative 125 V dc feeder for each solenoid. An economizing relay (KE1, 2, 3) is supplied for each solenoid with a normally closed contact in parallel with the current-limiting resistor. These relays are used to reduce the current load after the solenoids are energized.
The ETR and KE relay coils are powered from a 28 V DC source from the I/O controller. Each PPRÓ I/O pack in each of the R8, S8, and T8 sections supplies an independent 28 V dc source. The 28 V dc bus is current-limited and used for power to an external manual emergency trip contact, shown as E-STOP. Three master trip relays (K4X, K4Y, K4Z) disconnect the 28 V dc bus from the ETR and KE relay coils if a manual emergency trip occurs. Any trip that originates in either the protection module (such as EOS) or the TREG (such as a manual trip) will cause each of the three protection module sections to transmit a trip command over the IONet to the control module, and may be used to identify the source of the trip.
DIAGNOSTICS:
The I/O controller runs diagnostics on the TREG board and connected devices. The diagnostics cover the trip relay driver and contact feedback, solenoid voltage, economizer relay driver and contact feedback, K25A relay driver and coil, servo clamp relay driver and contact feedback, and the solenoid voltage source. If any of these do not agree with the desired value, then a fault is created. TREG connectors JX1, JY1, and JZI have their own ID device that is interrogated by the I/O controller. The ID device is a read-only chip coded with the terminal board serial number, board type, revision number, and the plug location. When the chip is read by the I/O board, and a mismatch is encountered, a hardware incompatibility fault is created.
WHY PARTNER WITH WORLD OF CONTROLS
World of Controls specializes in supplying high-quality, warranty-backed OEM replacement parts, including unused surplus and professionally rebuilt components, for critical turbine control and industrial automation systems like the General Electric Mark VI and Mark VIe platforms. To minimize customer downtime and ensure original equipment standard compliance, every component undergoes rigorous inspection, testing, and verification in an advanced electronics lab. Beyond parts distribution, the company delivers comprehensive, global support through 24/7 technical assistance, expert troubleshooting, component repair services, and rapid shipping, ensuring optimal efficiency and long-term reliability for critical industrial operations worldwide.
What is GE IS200TREGH3B?
It is a high-reliability Gas Turbine Emergency Trip Terminal Board (TREG) manufactured by General Electric for the Speedtronic Mark VI and Mark VIe series. It interfaces protection I/O controllers with emergency trip solenoids to safely shut down the turbine when fault limits are breached.
What is the main function of the Gas Turbine Emergency Trip Terminal Board?
It is a Turbine Emergency Trip Terminal Board that distributes the positive (+) side of a 125 V DC power loop to up to three fuel-trip solenoids, utilizing a 2oo3 relay matrix to execute emergency shutdowns safely.
What makes the H3B variant different from standard TREGH1B boards?
The standard H1B board blends power from JX1, JY1, and JZ1 for its internal circuits. The H3B is a specialized variant for redundant-board control cabinets where internal feedback and economizer power are drawn exclusively from the JX1 connection to isolate power sources.
Why must an H3B card be paired with an H4B card in redundant architectures?
Redundant systems utilize this specific arrangement so that if one board or power feed fails, the neighboring board (drawing strictly from JY1 via the H4B layout) continues running the protection loops without interruption.
