GE IS200ESELH1A EX2100 Exciter Selector Board

The GE IS200ESELH1A is an Exciter Selector (ESEL) Board designed for the GE EX2100 excitation control system. It receives logic-level gate pulse signals from the Exciter Main I/O (EMIO) board and routes the selected firing commands to the Exciter Gate Pulse Amplifier (EGPA) boards. This version has one bridge driver and supports redundant control configurations using two ESEL boards.

Functional Description

The IS200ESELH1A handles the selection and distribution of gate pulse commands within the EX2100 excitation control architecture. It receives six logic-level pulse signals from its corresponding EMIO board and transfers the commands through cable connections to the EGPA boards in the power conversion cabinet.

The active ESEL board is selected by Controller C in redundant control configurations. This arrangement allows the excitation system to use the gate pulse commands from the selected master controller, M1 or M2.

Technical Specifications

Bridge Driver Configuration

The H1 configuration provides one bridge driver. This configuration should be distinguished from other ESEL board groups because the number of supported bridge drivers affects the excitation system's power bridge arrangement.

For redundant controls, two ESEL boards are required. Each board receives commands from its corresponding controller, while Controller C determines which ESEL board is active.

System Connections

The EMIO board provides the logic-level gate pulse signals required by the ESEL board. The ESEL then distributes the selected commands to the EGPA boards through dedicated cable connections.

The main signal path is:

• EMIO: Supplies six logic-level gate pulse signals.
• ESEL: Selects and routes the active gate pulse commands.
• EGPA: Receives the commands and provides the gate pulse amplification required by the power conversion bridge.

The ESEL is installed as part of the EX2100 control architecture. Its bridge-driver capacity and controller arrangement should be checked when selecting a replacement board.

Frequently Asked Questions

Q: How many bridge drivers does the IS200ESELH1A support?

A: The IS200ESELH1A has one bridge driver. It belongs to the ESELH1 configuration and should not be confused with ESELH2 or ESELH3 configurations, which support different bridge-driver capacities.

Q: Does the IS200ESELH1A support redundant EX2100 controls?

A: Yes. Two ESEL boards are used in redundant control configurations, with one driven by M1 and the other by M2. Controller C selects the active ESEL board.

Q: Which board supplies the input signals to the IS200ESELH1A?

A: The EMIO (Exciter Main I/O) board supplies six logic-level gate pulse signals. The ESEL routes the selected commands to the EGPA boards in the power conversion cabinet.