IS215TTURH1B

GE IS200TTURH1B Mark VI Turbine Terminal Board-Speedtronic turbine control system. Also identified as a Primary Turbine Protection Input Terminal Board, the TTUR board provides turbine speed, generator voltage, bus voltage, shaft voltage, and breaker-related signal interfacing within the turbine control and protection system.

The board works with compatible turbine control and protection boards such as VTUR and is designed to support both Simplex and Triple Modular Redundant (TMR) configurations. Its relay circuitry includes K25, K25P, and K25A, which participate in generator breaker permissive and synchronization functions.

Product Specifications

• Manufacturer: General Electric (GE)
• Part Number: IS200TTURH1B
• Series: GE Mark VI / IS200
• Functional Acronym: TTUR
• Product Type: Turbine Terminal Board
• Function: Primary Turbine Protection Input Terminal Board
• Board Revision: H1B / B functional revision
• Number of Pulse Rate Inputs: 12
• Power Supply / Breaker Coil: 125 VDC nominal
• MPU Pulse Rate Range: 2 Hz to 20 kHz
• MPU Input Sensitivity: Approximately 27 mV peak
• MPU Pulse Rate Accuracy: Approximately 0.05% of reading
• Operating Temperature: Approximately -30°C to +65°C
• Board Dimensions: Approximately 33.0 cm × 17.8 cm
• Technology: Surface-mount / PCB assembly
• Relay Designations: K25, K25P and K25A

Functional Description:-

The IS200TTURH1B receives and interfaces with turbine-related signals used by the GE Mark VI control system. The board can accept signals from multiple passive pulse-rate devices used to sense turbine speed from a toothed wheel. It also interfaces with generator and bus voltage signals supplied by potential transformers.

The TTUR board provides control and protection functions associated with the main generator breaker. Its relay circuitry supports generator synchronization and breaker permissive functions, with a nominal 125 VDC output to the main breaker coil.

For TMR applications, signals from the R, S, and T control paths are distributed to the appropriate connectors and processed through voting logic before activating the relevant permissive relays. In Simplex applications, the board can be configured according to the system requirements using the appropriate jumper settings.