IS230TREAH1A - Turbine Emergency Trip terminal board

SPECIFICATIONS:

Part Number: IS230TREAH1A
Manufacturer: General Electric
Series: Mark VIe
Function: Turbine Emergency Trip terminal board
Number of Inputs: 3
Number of Outputs: 2
MPU pulse rate range: 2 Hz to 20 kHz
MPU pulse rate accuracy: 0.05%
Number of outputs: 2 trip contacts
MPU input circuit sensitivity: 27 mV pk
Availability: In Stock
Size: 33.0 cm x 17.8 cm
Temperature: -30 to 65�C
Technology: Surface mount
Country of Manufacture: United States (USA)

FUNCTIONAL DESCRIPTION:

IS230TREAH1A is an Aeroderivative Turbine Emergency Trip Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The Aeroderivative Turbine Emergency Trip (TREA) terminal board is designed to work with PPRO and YPRO turbine I/O packs as part of the Mark VIe or Mark VIeS system, respectively. It provides customer input terminals through either two 24-point pluggable barrier terminal blocks (H1A or S1A, H2A or S2A) or 48-point pluggable Euro-style box terminals (H3A or S3A, H4A or S4A). The board features nine passive pulse rate devices, three per X, Y, and Z section, that sense a toothed wheel to measure turbine speed, along with jumper blocks that allow one set of three speed inputs to fan out to all three PPRO or YPRO I/O packs. Additionally, it includes two TMR-voted output contacts (24 V dc for H1A/S1A and H3A/S3A, or 125 V dc for H2A/S2A and H4A/S4A) to trip the system, four 24�125 V dc voltage detection circuits for monitoring the trip string, and daughterboard connectors for optional feature expansion. In TMR systems, signals are fanned out to the JX1, JY1, and JZ1 DC-62 PPRO or YPRO connectors.

INSTALLATION:

For the H1/S1 and H2/S2 board variants, the voltage detection circuits and the breaker relay are connected directly to the I/O terminal blocks labeled TB1, while the passive pulse rate pick-ups are wired to TB2. Each terminal block is securely fastened to the board with two screws and contains 24 terminals, each capable of accommodating wires up to #12 AWG. A shield termination strip, which is attached to the chassis ground, is located immediately to the left of each terminal block to ensure proper grounding and minimize electrical interference.

For the H3/S3 and H4/S4 board variants, the wiring layout differs slightly. The voltage detection circuits and breaker relay are connected to the I/O box terminals located at the top of the board, whereas the passive pulse rate pick-ups are wired to the lower set of terminals. All terminals on these variants plug into headers on the TREA board itself, and each terminal accepts a single wire up to #12 AWG in size. This configuration ensures a compact, organized, and secure connection, while also facilitating straightforward maintenance and integration with the associated PPRO or YPRO I/O packs in the Mark VIe or Mark VIeS systems.

CONFIGURATION:

The configuration of the TREA terminal board involves the use of jumpers JP1 and JP2, which control the fanning of the three X-section passive speed pickups to the S and T section PPRO or YPRO I/O packs. By placing the jumpers over the appropriate pin pairs, the three R-section speed inputs can be fanned out to the other two TMR sections, allowing all sections to receive the same speed signal. This feature ensures synchronized turbine speed monitoring across redundant sections, enhancing system reliability and enabling proper trip logic in TMR configurations.

OPERATION:

The TREA board is designed to use three PPRA I/O packs mounted directly on it. The TREA / WREA / PPRA assembly then forms a self-contained emergency trip function. The TREAH1A, S1A, H3A, and S3A plus WREA will only function correctly with three PPRA I/O packs. Single and dual pack operations are not possible.

In systems with a single controller, the controller R network should be connected to the PPRA on the JX1 connector, the S network to the PPRA on the JY1 connector, and the T network to the PPRA on the JZ1 connector. All three networks are coming from the single controller. In systems with dual controllers, the controller R network should be connected to the PPRA on the JX1 connector, the S network to the PPRA on the JY1 connector, and both the R and S networks to the PPRA on the JZ1 connector. In systems with three controllers, the R network should be connected to the PPRA on the JX1 connector, the S network to the PPRA on the JY1 connector, and the T network to the PPRA on the JZ1 connector.

WORLD OF CONTROLS offers the largest stock of GE Distributed Control System (DCS) replacement parts to keep your operations running smoothly. In addition to supplying high-quality unused and rebuilt components, we provide expert repair services for faulty boards, all backed by a reliable warranty. Our dedicated team of automation specialists is available 24/7 to support your OEM requirements, ensuring minimal downtime and seamless integration of replacement or repaired parts. Whether you need technical guidance, part selection assistance, or urgent repair support, our experts are ready to assist with any automation or control system needs. For detailed pricing, availability, or service inquiries, contact our team directly via phone or email.

FREQUENTLY ASKED QUESTIONS:

What is the IS230TREAH1A?

It is an Aeroderivative Turbine Emergency Trip (TREA) Terminal Board from General Electric, designed for the Mark VIe Series. It provides emergency trip functionality by interfacing with PPRO or YPRO turbine I/O packs and monitors turbine speed using passive pulse rate devices. It is essential for safe turbine operation in TMR or redundant control systems.

How are the speed inputs configured for TMR systems?

Jumpers JP1 and JP2 allow fanning of X-section speed inputs to S and T sections, enabling all three TMR sections to receive the same speed signal. This ensures consistent turbine speed monitoring and reliable emergency trip performance.

What is the sensitivity and accuracy of the MPU inputs?

The MPU (Magnetic Pick-Up) input circuit has a sensitivity of 27 mV peak and supports pulse rates from 2 Hz to 20 kHz with an accuracy of �0.05%. This high precision ensures reliable speed detection even under low-speed or noisy signal conditions.

How are the voltage detection circuits configured?

Voltage detection circuits monitor each trip string with four independent 24�125 V DC inputs. In H1/S1 and H2/S2 , they connect to TB1, while H3/S3 and H4/S4 variants use the I/O box terminals. The circuits ensure the trip system is always armed and capable of safe operation.