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The GE IS200STURH3A is a Speed/Pulse Terminal Board for the GE Mark VIe (MKVIe) turbine control system. Its main function is to provide a dedicated interface for speed and pulse signals from sensors, which are critical for overspeed protection and precise speed control.
Function and Purpose ⚙️
The IS200STURH3A acts as the crucial link between the turbine’s speed sensors (such as magnetic pickups or proximity probes) and the main processor. These sensors generate a pulse or frequency signal that is directly proportional to the turbine’s rotational speed. The board provides a secure termination point for the wiring from these sensors. More importantly, it features built-in circuitry for signal conditioning, which filters out electrical noise and ensures that the raw pulse signal is accurately converted into a clean, reliable digital signal that the control system can use. This is vital for:
- Overspeed Protection: The board’s signals are used by the system’s safety circuits to trip the turbine if its speed exceeds a safe limit, preventing catastrophic failure.
- Speed Control: The signals are also used by the control system to precisely regulate the turbine’s speed during startup, load changes, and synchronization with the grid.
Related Components 🤝
The IS200STURH3A works in conjunction with other components of the Mark VIe system:
- Speed/Pulse I/O Packs: These electronic modules, such as the IS200SPRO, mount directly on the terminal board and contain the active electronics for processing and converting the pulse signals.
- Processor Cards: The main CPU of the system, which reads the digitized speed data from the I/O packs and executes control and safety logic.
- Speed Sensors: These are the actual sensors mounted on the turbine casing or shaft, which provide the pulse or frequency signal.
