Description
- Model Number: IS200TPROS1CBB (Compatible with IS230TSPRH1C / MRP680538)
- Series: Mark VI / Mark VIe Speedtronic
- Board Type: Turbine Emergency Protection Termination (TPRO)
- Redundancy: Supports Triple Modular Redundant (TMR) configurations
- Functions: Overspeed protection, E-Stop integration, and trip relay control
- Voltage Rating: 24V DC / 125V DC (Trip circuit dependent)
- Country of Origin: USA
- Weight: 1.76 lbs (0.80 kg)
- Dimensions: 11.2 in x 7.0 in x 1.2 in (28.4 cm x 17.8 cm x 3.0 cm) The GE IS200TPROS1CBB acts as the primary hardware interface for the emergency turbine protection system, specifically designed to manage trip signals within the Mark VI architecture. It integrates critical inputs from speed sensors and emergency stop buttons to control the primary trip relays, ensuring the turbine safely shuts down during an overspeed or fault condition. This “CBB” revision is built for high-reliability environments, featuring robust physical relay paths and sophisticated signal monitoring that allows the control system to “vote” on trip conditions across the R, S, and T cores.
GE IS200TPROS1CBB IS230TSPRH1C MRP680538
GE IS200TPROS1CBB IS230TSPRH1C MRP680538
GE IS200TPROS1CBB IS230TSPRH1C MRP680538
Model Comparison
The IS200TPROS1CBB is the classic Mark VI version, whereas the IS230TSPRH1C (and its identifier MRP680538) represents the updated Mark VIe “S” style termination board. While they perform identical safety functions, the IS230 variant is designed for the modern “I/O Pack” architecture, featuring improved electrical isolation and a smaller footprint for high-density DIN-rail mounting. The “CBB” version of the IS200 board includes hardware refinements for relay durability and noise suppression that were absent in the earlier “AAA” or “BAA” revisions, making it the preferred choice for legacy system upgrades.
Operation Tips
- Voting Integrity: In TMR systems, verify that all three TPRO boards are correctly synced with the associated TREG (Turbine Emergency Trip) board to ensure the 2-out-of-3 voting logic is operational.
- Magnetic Pickup (MPU) Check: Ensure that speed sensor cables connected to the TPRO are twisted-pair and shielded to prevent electromagnetic interference from triggering a false overspeed trip.
- Relay Lifecycle: Periodically perform “Trip Tests” during planned outages as recommended in the GE maintenance manual to verify that the mechanical relays on the TPRO have not become stuck due to inactivity.
- Revision Matching: When replacing an IS200TPROS1CBB, pay close attention to the jumper settings (JP) on the board; these must be identical to the original unit to match the specific voltage requirements of your turbine’s trip solenoids.
