The IS200VTURH1BAA is a core turbine-specific main overspeed trip protection board (VTUR) developed by General Electric (GE) for the Speedtronic Mark VI steam turbine/gas turbine control system. As a dual-slot VME bus architecture interface board, it is primarily used to monitor the operating status of industrial steam turbines. Upon detecting an anomaly, it drives the protection circuitry to execute a safe shutdown, thereby ensuring the integrity of large electrical equipment.
The IS200VTURH1BAA possesses powerful signal monitoring and logic control capabilities, integrating four dynamic vibration inputs and two key phase inputs, with a sampling rate up to 100 kS/s, capable of receiving high-precision MPU speed pulse signals from 2 Hz to 20 kHz. Its core task is to accurately execute overspeed trip processing. Onboard logic circuitry can directly control and drive three overspeed trip solenoid valves located on relevant terminals (e.g., the TRPx series), achieving mechanical-level high-speed protection linkage.
In terms of system adaptability and high reliability, this circuit board is designed for triple redundancy (TMR) and simplex systems. In TMR fault-tolerant environments, the IS200VTURH1BAA eliminates the risk of single points of failure through a multi-relay "voting mechanism"; while in stand-alone mode, it simplifies operation, can be used with terminal blocks such as TTUR and TRPG, and is widely used in high-risk locations such as gas turbines and steam turbines in the global power and heavy industries.
