IS200TRPAH2AGD - Aeroderivative Turbine Primary Trip Terminal Board

SPECIFICATIONS:

Part Number: IS200TRPAH2AGD
Manufacturer: General Electric
Series: Mark VIe
Board Type: Aeroderivative Turbine Primary Trip Terminal Board
Number of inputs: 3x4
Number of outputs: 2 trip
Input span, transmitters: 1-5 V dc
Maximum lead Resistance: 15 maximum
MPU pulse rate range: 2 Hz to 20 kHz
MPU input circuit sensitivity: 27 mV
Dimensions: 33.0 cm wide x 17.08 cm high
Mounting Type: Surface-mount
Operating Temperature Range: 30°C to +65°C
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION:

IS200TRPAH2AGD is an Aeroderivative Turbine Primary Trip Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distribution Turbine Control Systems. It works with PTUR / YTUR I/O packs and TTUR terminal boards as part of the Mark VIe control system. The inputs and outputs are as follows:

Twelve 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)
Two 24 V dc (H1A) or 125 V dc (H2A) TMR voted output contacts to the main breaker coil for trip coil.
Four 24-125 V dc voltage detection circuits for monitoring trip string.
One 24-125 V dc ‘Fail-safe’ ESTOP input for removing power from trip relays. For TMR systems, signals fan out to the PR3, PS3, PT3, JR4, JS4, and JT4 connectors.

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 pickups 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 or YTURs

DIAGNOSTICS:

• Feedback from the shorted contact detector should be checked; if there is a problem with the control signal, an alarm should be created.
• Feedback from the ESTOP/TRP input is checked; if there is a problem with the signal, a fault should be created.
• Feedback from speed pickup fanning jumpers is checked; if there is a mismatch between intention and actual position, an alarm should be created.
• If any one of the above signals goes unhealthy, a composite diagnostic alarm DIAG_PTUR or DIAG_YTUR occurs. The diagnostic signals can be individually latched and then reset with the RESET_DIA signal if they go healthy.
• Terminal board connectors have their own ID device that is interrogated by the I/O pack. The ID device is a read-only chip coded with the terminal board's serial number, board type, revision number, and plug location. When the chip is read by PTUR, and a mismatch is encountered, a hardware incompatibility fault is created.

OPERATION:

System Design: 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.

Voltage Monitors: The trip relays on TRPA may be freely located anywhere in a trip string. Because the trip string circuit is not fixed, there are four general-purpose isolated voltage sensor inputs on TRPA. These may be used to monitor any points in the trip system and drive the voltage status into the system controller where action may be taken. Typical use of these inputs may be to sense the power supply voltage for the two trip strings and to sense the solenoid voltage of the device being driven by the relays. This set of applications is used in the wording of the board symbol, but the sensors may be freely applied to best serve the application.

Trip Relays: The trip relays are made using sets of six individual form A devices arranged in a voting pattern. Any two controllers that vote to close will establish a conduction path through the set. Because detection of a shorted relay is important to preserve tripping reliability there is a sensing circuit applied to each of the sets of relays.

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FREQUENTLY ASKED QUESTIONS:

What is the function of the Primary Trip Terminal Board?

The Primary Trip Terminal Board is responsible for processing trip signals and initiating turbine shutdown in case of faults. It receives inputs from protection devices like overspeed sensors, pressure switches, and fire detection systems. When a hazardous condition is detected, it triggers relays to cut off the fuel supply and stop the turbine.

How does the trip terminal board process trip signals?

The trip terminal board receives signals from various protection mechanisms and processes them through relays and logic circuits. If a trip condition is met, it de-energizes the trip relay, activating the shutdown process. This ensures a fast and reliable response to potential turbine failures.

What are the key electrical specifications of the trip terminal board?

Most trip terminal boards operate on 24V DC or 120V AC input voltage and use dry contact or solid-state relays. The response time is typically less than 10 milliseconds to ensure immediate shutdown. It is designed with high dielectric strength to withstand voltage fluctuations and harsh environments.