About the IS200EACFG3A
The Exciter AC Feedback Board IS200EACFG3A is the final of the three G versions of the IS200EACF board. The G3 version of this module can handle an input voltage of up to 1300 VRMS. The transformers on this model typically supply a nominal of 1.6 VRMS. The IS20EACFG3A module has four voltage test rings labeled TP1, TP2, TP3, and TP4. Normally these four voltage rings are paired together and measure the phase voltage outputs; together TP1 and TP2 obtain the Line voltage AB, TP3 and TP4 obtain the Line voltage BC, and TP4 and TP1 obtain the Line voltage CA.
The IS200EACFG3A model has three screw terminals, TB1, TB2, and TB3 all have different signals that they are used for, the three are each connected to potential phase transformers. TB1 is connected to PPT phase A, TB2 is connected to PPT phase B, and TB3 is connected to PPT phase C.
While this board is not widely available new, it can be found used. AX Control INC offers repair of the board and offers the next generation model that can be used as a replacement for the IS200EACFG3A board.