GE IS200EGDMH1AAB EXAM Ground Detector Module

GE IS200EGDMH1AAB EXAM Ground Detector Module

د.إ8,888.00

GE IS200EGDMH1AAB Exciter Field Ground Detector Module (EGDM) is a highly specialized printed circuit board used as a critical safety component within the GE EX2100 Excitation Control System.1

Its core function is to provide continuous monitoring and detection of ground faults (leakage resistance) in the generator’s field circuit.2

🧠 Core Functions

The EGDM is essential for protecting the generator and exciter from potentially catastrophic damage caused by ground faults, which can lead to over-voltage and serious equipment failure if left undetected.3

  • Field Ground Detection: The primary role is to detect any leakage resistance between any point in the generator field circuit and ground.4
  • AC and DC Circuit Monitoring: It is capable of detecting grounds on both the AC and DC sides of the generator’s field circuit (starting from the AC secondary windings of the input transformer, through the exciter system, and onto the generator field).5
  • Active Detection: The module applies a low-voltage test signal with respect to ground and then monitors the current flow through a high-impedance ground resistor.6 This active detection allows it to identify grounds even when the exciter is not actively running (SCRs are not gating).7
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The GE IS200EGDMH1AAB Exciter Field Ground Detector Module (EGDM) is a highly specialized printed circuit board used as a critical safety component within the GE EX2100 Excitation Control System.1

Its core function is to provide continuous monitoring and detection of ground faults (leakage resistance) in the generator’s field circuit.2

🧠 Core Functions

The EGDM is essential for protecting the generator and exciter from potentially catastrophic damage caused by ground faults, which can lead to over-voltage and serious equipment failure if left undetected.3

  • Field Ground Detection: The primary role is to detect any leakage resistance between any point in the generator field circuit and ground.4
  • AC and DC Circuit Monitoring: It is capable of detecting grounds on both the AC and DC sides of the generator’s field circuit (starting from the AC secondary windings of the input transformer, through the exciter system, and onto the generator field).5
  • Active Detection: The module applies a low-voltage test signal with respect to ground and then monitors the current flow through a high-impedance ground resistor.6 This active detection allows it to identify grounds even when the exciter is not actively running (SCRs are not gating).7
  • EXAM Interaction: The EGDM works in conjunction with an EXAM (EXcitation AMplifier) module that acts as an attenuator, sensing the voltage across the ground sense resistor in the high-voltage module.8
  • Isolated Communication: The ground detection signal is processed by the EGDM and transmitted to the main control processor (the DSPX board) via a fiber-optic link (often through a companion board like the EISB).9 This ensures superior electrical isolation and noise immunity.

🛠️ Technical Specifications and System Integration

Feature Details
System GE EX2100 Excitation Control System (part of the Mark VI series)
Functional Acronym EGDM (Exciter Field Ground Detector Module)
Mounting Location Exciter Power Backplane Rack (EPBP)
System Configuration One EGDM is used in a Simplex system; Three EGDMs are used in a Redundant (TMR) system (configured as C, M1, and M2 controllers).
Communication Fiber-optic link to the DSPX module via the EISB board.
LED Indicators Includes LEDs for Power Status, Active Status (detection in progress), and Selective Master Status (in redundant systems).
Revision The suffix H1AAB denotes the specific hardware and artwork revisions.

The EGDM provides essential diagnostic and protective information, allowing the system to maintain constant sensitivity to grounds regardless of the operating voltage or the exact location of the ground in the field circuit.10

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