GE IS200EDEXG1A EX2100 Exciter De-Excitation Board for Turbine Generator Protection and Control

Applications

The IS200EDEXG1A is used in mission-critical industrial environments where controlled field energy dissipation is essential, such as:

• Power plant steam and gas turbine systems

• Generator protection and shutdown sequencing

• Emergency excitation field de-energization

• Excitation control feedback and protection loops

• Integrated SCADA and industrial automation systems

Its design allows safe de-excitation firing and energy dissipation even in power failure conditions.

Advantages

Safe Field Energy Dissipation
Precisely controls SCR firing during shutdown to dissipate stored field energy and protect generator components.

Conduction Sensing Feedback
Hall effect sensors detect SCR conduction state to ensure accurate de-excitation firing and feedback.

Voltage Retention During Power Loss
Internal circuitry retains voltage long enough to complete de-excitation firing even during mains loss.

Configurable Operation
Configurable jumpers (JP1–JP6) allow tuning of response and firing behavior for specific applications.

Industrial-Grade Reliability
Designed to operate under the temperature and electrical stress environments typical of turbine generator cabinets. 

Technical FAQs

1. What is the purpose of the IS200EDEXG1A?
   A de-excitation board that controls the safe collapse of generator excitation field energy via SCR firing when shutdown is initiated.

2. Which systems use this module?
   GE EX2100 Excitation Control Systems and Mark VI turbine automation platforms.

3. How is the de-excitation signal generated?
   It fires SCRs when control inputs are true or when an SCR’s anode-to-cathode voltage exceeds a set threshold.

4. Can the board operate during a power failure?
   Yes — its voltage retention capability ensures de-excitation firing even during loss of supply.

5. What voltage does it require?
   It receives 24 V DC from the ESPM power module, internally converting to 125 V DC for firing circuitry.

6. Why are conduction sensors used?
   Hall effect sensors monitor SCR conduction to ensure accurate de-excitation firing.

7. What are the configurable jumpers for?
   They allow adjustment of operational parameters such as firing thresholds and timing.

8. Is this board repairable?
   Yes — IS200EDEXG1A is typically repairable through PCB level service.

9. Where is it installed?
   Rack or panel-mounted inside the exciter cabinet of the control system.

10. What other modules does it interact with?
    It interacts with feedback boards (AC/DC), interface boards (EMIO), and protection/control logic modules.