GE DS200TCEAG1A Emergency Overspeed Board

الوصف

The GE DS200TCEAG1A is a critical safety component known as the Emergency Overspeed Board for the GE Speedtronic Mark V Turbine Control System.¹

Its primary and most important role is to provide high-speed, independent protection against catastrophic failures like turbine overspeed.² It’s often referred to as a Protective Processor because it acts independently of the main control processor to ensure trip logic is executed quickly.³

🛡️ Primary Function and Safety Role

The DS200TCEAG1A board resides within the **Protective Core (⁴$\text{P}$) ** of the Mark V system, which is designed to operate with a high degree of independence and redundancy (in Triple Modular Redundant or TMR systems) from the main control system.⁵

• Emergency Overspeed Protection: This is the board’s paramount function.⁶ It receives and processes signals from speed sensors to constantly monitor the turbine’s shaft speed. If the speed exceeds a pre-set emergency trip limit, the board will initiate a turbine trip (shutdown) to prevent severe mechanical damage or failure.⁷

   

• Trip Signal Processing: It is responsible for processing other critical trip signals, notably flame detection trip signals in gas turbines.⁸

   

• Signal Conditioning and Scaling: The board takes raw signals for functions like low/high shaft speed and automatic synchronization, conditions and scales them, and then writes this data to other system boards (like the STCA board) over the IONET for use by the main control engine.⁹

   

• Turbine Trip Coordination: The TCEA board can send emergency trip signals to the Turbine Trip Board (TCTG).¹⁰ In TMR systems, the TCTG can use a 2-out-of-3 (2/3) voting logic from the redundant TCEA boards to definitively determine if a trip should be executed, enhancing reliability.¹¹

   

🛠️ Key Components and Features