IS200EGPAG1BEC   PULSE AMPLIFY

IS200EPDMG1B

Before examining the various hardware components important to this devices’s functionality as a

Gate Pulse Amplifier, it is important to consider the actual functionality of the product itself. This

EGPA board was created as a sort of interface that acts between the EX2100 Series drive assembly’s

control and its Power Bridge. This IS200EGPAG1BEC board collects the compatible ESEL board’s

various gating commands in order to generate gate firing pulses attributed to six total Silicon Controlled

Rectifiers or SCRs. The IS200EGPAG1BE Exciter Gate Pulse Amplifier features additional

functionality in its interfacing for bridge airflow monitoring, temperature monitoring, and current

conduction feedback. While many EX2100 Excitation Control System Series Exciters utilize a series

of Klixon switches for their temperature control and alarm generation, newer EX2100 exciter

models may incorporate a RTD instead. Two total switches are wired to the EGPA board, and may

require retrofitting to their existing bridges. Both of these switches are classified as thermal switches, and

one opens up at the alarm level temperature rating of 170 degrees fahrenheit, while the other opens at the

trip level of 190 degrees fahrenheit. When either of these two mentioned switches are opened, a bridge over

temperature alarm is generated that may interrupt normative EX2100 drive assembly activity. In the

case that both switches in the EGPA board assembly were to be activated, a fault and fault trip are generated for the IS200EGPAG1BEC PCB.