GE IS200EXHSG4AEC Exciter High Speed Relay Driver Board

GE IS200EXHSG4AEC Exciter High Speed Relay Driver Board

د.إ8,888.00

GE IS200EXHSG4AEC Exciter High-Speed Relay Driver Board (EXHS) is a specialized Printed Circuit Board (PCB) used in the GE EX2100 Excitation Control System for large industrial generators.

The key to understanding this board is the “G4” designator, which defines its operating mode and application within the exciter system.

⚡ Core Function

Like all EXHS boards, the primary role of the IS200EXHSG4AEC is to serve as a high-speed interface between the low-voltage control logic of the main turbine controller (Mark VI/VIe) and the high-power switching devices in the exciter cabinet.

Its functions are critical for generator protection and control:

  • Field Flashing: It drives the pilot relays for the Field Flashing Relays (53A and 53B), which are necessary to initially establish the generator’s magnetic field.
  • De-Excitation: It manages the pilot relay for the De-Excitation Relay (KDEP), which rapidly removes the generator field during a trip to prevent overvoltage and damage.
  • High-Speed Protection: It processes and conditions status feedback signals (including crowbar and de-excitation status) and delivers them to the Exciter Main Input/Output (EMIO) boards for monitoring and protection.
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The GE IS200EXHSG4AEC Exciter High-Speed Relay Driver Board (EXHS) is a specialized Printed Circuit Board (PCB) used in the GE EX2100 Excitation Control System for large industrial generators.

The key to understanding this board is the “G4” designator, which defines its operating mode and application within the exciter system.

⚡ Core Function

Like all EXHS boards, the primary role of the IS200EXHSG4AEC is to serve as a high-speed interface between the low-voltage control logic of the main turbine controller (Mark VI/VIe) and the high-power switching devices in the exciter cabinet.

Its functions are critical for generator protection and control:

  • Field Flashing: It drives the pilot relays for the Field Flashing Relays (53A and 53B), which are necessary to initially establish the generator’s magnetic field.
  • De-Excitation: It manages the pilot relay for the De-Excitation Relay (KDEP), which rapidly removes the generator field during a trip to prevent overvoltage and damage.
  • High-Speed Protection: It processes and conditions status feedback signals (including crowbar and de-excitation status) and delivers them to the Exciter Main Input/Output (EMIO) boards for monitoring and protection.

⚙️ G4 Distinction: Simplex Breaker Mode

The G4 variant of the EXHS board is distinct from the more common G1 (Contactor Mode) and G3 (Breaker Mode, Redundant Control).

Feature IS200EXHSG4AEC (G4) IS200EXHSG3AEC (G3)
Control Mode Breaker Mode Breaker Mode
Redundancy Simplex Control (Single Controller) Redundant Control (TMR)
Field Connection Utilizes a DC Field Breaker (41) Utilizes a DC Field Breaker (41)
Relays Contains relays for the Close Relay (41) and Trip Relay (41T) of the field breaker. Contains relays for the Close Relay (41) and Trip Relay (41T) of the field breaker.

Key Takeaway: The IS200EXHSG4AEC is designed for EX2100 systems that use a DC Field Breaker (instead of a Contactor) to connect the exciter output to the generator field, and where the overall control system is configured for Simplex (non-redundant) operation.

🛠️ Board Configuration and Connectivity

  • System Family: GE Mark VI/VIe and EX2100.
  • Connectivity: It connects to the single EMIO board (typically in the M1 controller) via

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