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The GE IS200EPSDG1A is the Exciter Regulator Power Supply Daughterboard (EPSD), which functions as an auxiliary component for the larger Exciter Power Supply Module (EPSM) in the GE EX2100 Excitation Control System (part of the Mark VI/VIe Speedtronic family).
⚡ Function of the EPSD Board
The IS200EPSDG1A board’s primary role is to modify and protect the input power path for the Exciter Power Supply Module (EPSM) in regulator control applications.
- Higher Voltage Compatibility: Its main function is to modify the power input path of the EPSM, allowing it to safely accept and handle higher DC input voltages by increasing the creepage and clearance distances required for high-voltage isolation.
- Protection: It incorporates a high-voltage fuse between the regulator’s DC link power source and the EPSM’s internal buck-regulator circuit. This fuse provides essential overcurrent protection for the power supply circuitry.
- Assembly: It’s a small printed circuit board (PCB) that physically mounts onto the main EPSM board using standoffs and screws, acting as a crucial intermediary for the power input connector.
The EPSM, which this board supports, is responsible for converting the input power from the Power Distribution Module (EPDM) into the various logic-level DC voltages (, , ) required to power the main DSPX controllers and I/O boards in the exciter system.
The presence of the EPSD board is typically noted on a specific group of Exciter Power Supply Modules, such as the EPSMG2 series, which are used to control the exciter regulator.
