IS230TRPAH2A - Turbine Primary Trip Terminal Board

SPECIFICATIONS:

Part Number: IS230TRPAH2A
Manufacturer: General Electric
Series: Mark VIe
Function: Turbine Primary Trip Terminal Board
Number of Inputs: 3 x 4 Voltage
Number of Outputs: 2 trip
Temperature: -30 to 65°C
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
Technology: Surface mount
Country of Manufacture: United States (USA)
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION:

IS230TRPAH2A is a Turbine Primary Trip Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The Turbine Primary Trip Terminal Board serves as a central hub for the connection and management of various trip signals that are crucial for the safe operation of the turbine. It ensures that the turbine can be quickly and safely shut down (tripped) in the event of abnormal conditions or failures. The turbine primary trip terminal board, TRPAH2A, works with the PTUR turbine I/O packs or with the TTUR terminal board as part of the Mark VIe system. The inputs and outputs are as follows:

• 12 passive pulse rate devices (four per R/S/T section) sensing a toothed wheel to measure the turbine speed. Or, six active pulse rate inputs (two per TMR section)
• 2 24 V dc (H1) or 125 V dc (H2) TMR voted output contacts to the main breaker coil for the trip coil.
• 4 24-125 V dc voltage detection circuits for monitoring trip string.

INSTALLATION:

TTL pulse rate pick-ups, voltage detection, E-STOP, and the breaker relay are wired to the I/O terminal blocks TB1. Passive pulse rate pick-ups are wired to TB2. Each block is held down with two screws and has 24 terminals accepting up to #12 AWG wires. A shield termination strip attached to the chassis ground is located immediately to the left of each terminal block. The TRPA must be configured for the desired speed input connections using the following table. Jumpers JP1 and JP2 select fanning of the R section pulse rate pickups to the S and T PTURs.

E-STOP/TRP INPUT:

• The TRP inputs must be powered for the relays to operate. If the user does not need or use an ESTOP, then jumper the local TRP power source (P24O/R) to the respective TRP inputs at the terminal board.
• There must be a minimum of 18 V dc at the TRP inputs for proper operation. The current required was kept low to minimize drop on long cable runs.
• As the TRP is very fast < 5ms and the output relay contacts are also fast (< 15ms), best wiring practices should be utilized to avoid misoperation. Use twisted-pair cable when possible and avoid running with ac wiring and so on.

OPERATION:

The TRPA board is designed for application in two different ways. When a TTUR terminal board is used to hold three PTUR I/O packs the TRPA terminal board may be connected using three cables with DC-37 pin connectors on each end. In this mode of operation, the TRPA provides two contact-voted trip relay outputs, ESTOP, and four voltage sensors. TTUR provides the normal set of features described for that board. The TRPA speed inputs are not active and should not be connected to this board.

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FREQUENTLY ASKED QUESTIONS:

What type of speed inputs does this board support?

The board supports 12 passive pulse rate devices, with four assigned to each R/S/T section, which sense a toothed wheel to measure turbine speed. Additionally, it supports six active pulse rate inputs, with two allocated per TMR section, providing flexible speed sensing options for turbine monitoring.

What are the output contacts for tripping the turbine?

For turbine trip functionality, the board features two TMR-voted output contacts, which can be configured for either 24 V DC (H1) or 125 V DC (H2). These contacts directly connect to the main breaker trip coil to ensure a rapid and reliable trip response when necessary.

How many voltage detection circuits are available?

There are four voltage detection circuits operating within the 24-125 V DC range. These circuits are responsible for continuously monitoring the trip string, ensuring system integrity, and detecting any anomalies that may require immediate action.