GE IS200EDEXG1BBB De-Excitation Control Board
GE IS200EDEXG1BBB
Product Overview
The GE IS200EDEXG1BBB is an Exciter De-Excitation Control Board designed for GE EX2100 excitation control systems. It plays an important role in managing generator field energy during shutdowns and emergency conditions.
When a generator trips or its field breaker opens, the board helps initiate the de-excitation process. As a result, stored magnetic energy can be safely dissipated, reducing electrical stress and supporting generator protection.
The board works with other excitation system components, including the EMIO and EXTB boards, to coordinate the de-excitation sequence.
Main Technical Parameters
| Parameter | Description |
|---|---|
| Manufacturer | General Electric (GE) |
| Product Model | IS200EDEXG1BBB |
| Product Type | De-Excitation Control Board |
| Functional Acronym | EDEX |
| Product Series | EX2100 / EX2100e |
| Nominal Voltage | 24 V DC |
| Operating Temperature | -30°C to +65°C |
| De-Excitation Method | SCR-based |
Key Features
- Fast Energy Dissipation: Supports rapid removal of stored generator field energy during shutdown conditions.
- SCR Firing Control: Provides firing signals for silicon-controlled rectifiers used in the de-excitation circuit.
- System Coordination: Exchanges control signals with associated excitation modules.
- Voltage Retention: Includes a voltage hold-up function to support operation during power interruptions.
- Protection Support: Helps reduce the risk of electrical stress during abnormal operating conditions.
Functional Structure
The board incorporates several functional circuits that support reliable de-excitation operation:
- SCR firing circuit for controlled switching.
- Conduction sensing circuit for monitoring SCR operation.
- Voltage hold-up circuit for maintaining control power.
- Signal interface connections for communication with external modules.
- Configurable connection points for circuit adaptation.
Typical Applications
This control board is suitable for use in:
- Gas turbine generator excitation systems.
- Industrial power generation facilities.
- Generator protection cabinets.
- GE EX2100 excitation control installations.
- Power plant electrical control systems.
Installation and Maintenance
Proper installation is essential for stable operation. Before installation, technicians should verify the board revision and system compatibility. In addition, all connectors and wiring should be checked for damage or loose connections.
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