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The GE IS200WREAS1A is a Aero Trip Terminal Board for the Mark VIeS (Safety) series of GE’s Speedtronic Gas Turbine Control Systems. The ‘S’ in the part number and the description “SIL” (Safety Integrity Level) indicate that this board is designed for safety-critical applications, specifically for overspeed and trip protection in aeroderivative turbines.
Key Features and Functionality
The IS200WREAS1A is a crucial component for the safe operation of high-speed aeroderivative turbines. Its main functions include:
- Safety-Critical Trip Logic: This board is engineered to a specific Safety Integrity Level (SIL), which means it meets rigorous standards for reliability and fault tolerance. It receives signals from speed and pressure sensors and executes safety logic to initiate a turbine trip (shutdown) if operating conditions become unsafe.
- Overspeed Protection: Aeroderivative turbines operate at very high speeds, making overspeed protection a top priority. The WREAS1A board is a core part of the overspeed protection system, providing fast and reliable trip functionality to prevent catastrophic mechanical failure.
- Redundant Design: The board is designed to support the redundant architecture of the Mark VIeS system. In a triple redundant system, three WREAS1A boards can be installed, each with its own independent trip logic. This ensures that a single board failure will not compromise the system’s ability to protect the turbine.
- Specialized Inputs: It is specifically designed to interface with turbine-specific sensors, such as high-frequency speed pickups and pressure transmitters, which are used to determine the turbine’s operational state.
Technical Specifications
