About the IS200VTURH1BAC
One of the features of the IS200VTURH1BAC is that it can be used in triple modular redundant or simplex applications. When the VTUR board is used in a simplex application, up to four pulse rate signals will measure the turbine speed. The bus and generator voltages on this board will be brought on for automatic synchronization used in concurrence with the turbine controller and excitation system. The IS200VTURH1BAC model will be used with the TTUR for permissive generator synchronization relays and control of the main breakers relay coil 52 G. A shaft voltage on the VTUR board will be picked up with brushes and monitored with the current to the machine's case.
All of the above information regarding the IS200VTURH1BAC model can be found in the GEH-6421 Volume II Mark VI Turbine Control System Guide.