SPECIFICATIONS
Part Number: IS200TPROH1A
Manufacturer: General Electric
Series: Mark VI
Product type: Turbine Protection Terminal Board
Country of Manufacture: United States (USA)
Functional Description
IS200TPROH1A is a turbine protection terminal board developed by GE under Mark VI control system. As part of an independent emergency overspeed and synchronization protection system, TPRO sends speed signals, temperature signals, generator voltage, and bus voltage to the VPRO.
Features
- The protection mechanism comprises three redundant VPRO boards, which are housed in a separate module from the main turbine control system. This redundancy enhances reliability and ensures continued protection in case of component failure.
- Trip Solenoid Control via TREx and TRPx Terminal Boards:
- The TREx (TREG, TREL, or TRES) terminal boards control the trip solenoids.
- The TPRO board feeds all three VPRO boards with critical input signals.
- The TRPx (TRPG, TRPL, or TRPS) terminal boards manage the negative side of the 125 V DC supply, while the TREx board handles the positive side.
- Up to three trip solenoids can be connected between TREx and TRPx boards, allowing multiple layers of protection.
- Emergency Overspeed and Trip Functionality: The VPRO module is responsible for executing the emergency overspeed protection and emergency stop functions. It directly controls the trip solenoids, ensuring a quick and safe turbine shutdown when necessary.
- TREG Relay Management: The VPRO module manages the TREG board's 12 relays. Nine of these relays are grouped into three sets of three, which control the trip solenoids. A second TREG board can be connected to the VPRO module via the J4 connector for additional redundancy and operational flexibility.
Installation Procedure
- TPRO's first terminal block is wired with the generator and bus potential transformers, analog inputs, and thermocouples.
- The magnetic speed pickups are connected to the second block via wire. JP1A and JP1B are configured to provide a 4-20 mA or voltage input on the first of three analog inputs.
Operation
- The Primary function is to provide speed signals to the VPRO for the turbine's emergency overspeed (EOS) protection.
- TPRO also provides generator signals for backup synchronization check protection, three analog current inputs, and nine thermocouple inputs, primarily for gas turbine exhaust over-temperature protection.
- VPRO supplies TPRO with 28 V dc to power the three analog input transmitters.
Generator and Bus Voltage Sensors
- Two Single-Phase Potential Transformers, 115 V rms secondary.
- Voltage accuracy is 0.5% of rated Volts rms.
- Frequency Accuracy 0.05%.
- Phase Difference Measurement better than 1 degree.
- Allowable voltage range for synchronizing is 75 to 130 V rms.
- Each input has a load of less than 3 VA
WOC is happy to assist you with any of your GE requirements. Please contact us by phone or email for pricing and availability on any parts and repairs.
FREQUENTLY ASKED QUESTIONS
What is IS200TPROH1A?
It is a turbine protection terminal board developed by GE
How many VPRO boards are there in the system?
There are three redundant VPRO boards in the system, all located in a separate module from the turbine control system.
What is the role of TREx in the system?
TREx controls the trip solenoids (TREG, or TREL, or TRES) in the system.
What inputs does TPRO provide to the VPRO boards?
TPRO feeds speed signals, temperature signals, generator voltage, and bus voltage inputs to all three VPRO boards in the system.
What is the function of the TRPx terminal board?
The TRPx terminal board supplies the negative side of the 125 V dc to the trip solenoids in the system.
