GE IS200EBRGH2A Exciter Bridge Interface Board

GE IS200EBRGH2A Exciter Bridge Interface Board

Functional Description

The EBRG interfaces the EX2100e control to the SCR (power bridge) and related bridge I/O terminal boards.

It takes the six gate commands from the UCSx controller and controls the gate firing of up to six SCRs on the

bridge. Bridge control passes through the EBRG. One EBRG is required per PCM. It is also the interface for

current conduction feedback, Rogowski coil current feedback, bridge analog output (DACs), bridge airflow

and temperature monitoring, and to control cooling fans on the EX2100e 100 mm systems. The EBRG can

provide automatic start/stop control of a single power converter cooling fan, or lead/lag control of

redundant power converter cooling fans.

A nominal 125 V dc power source from the EDIS supplies an on-board dc-to-dc converter that provides

power for SCR gating over the full range of input supply voltage. LED indicators provide visual status of the

output firing, currents into the bridge, gate power supply, line filter, cooling fan rotation, bridge

temperature, and alarm or fault conditions.

The EBRG is compatible with most SCR devices, allowing use over a wide range of SCR ratings and bridge

architectures, including simplex, WBU, and parallel bridge converter.

Technical Specifications