GE IS200EGPAG1B Exciter Gate Pulse Amplifier Board

GE IS200EGPAG1B Exciter Gate Pulse Amplifier Board

Functional Description

The IS200EGPAG1B Gate Pulse Amplifier Board (EGPA) is used in the EX2100 Excitation Control. It takes the

gate commands from the ESEL and controls the gate firing of up to six SCRs (Silicon Controlled Rectifiers) on

the Power Bridge. It is also the interface for current conduction feedback, and bridge airflow and 

temperature monitoring. 

The EGPA functional model with the major I/O is shown in the following figure. A nominal 125 V dc power

source from the EPDM supplies an on-board dc/dc converter, that provides power for SCR gating over the

full range of input supply voltage. LEDs provide visual indication of the status of the EGPA power supply, 

input gate commands from ESEL, EGPA outputs to the SCRs, currents into the bridge, line filter, cooling fan

rotation, bridge temperature, alarms, or fault 

conditions.

Technical Specifications