Configured for field‑ground resistance monitoring in EX2100 excitation systems, the GE IS200EGDMH1A (IS200EGDMH1A exciter ground detector module) provides direct measurement of generator field‑to‑ground resistance through backplane‑routed sensing signals.
Hardware Specifications
Parameter
Specification
Model
IS200EGDMH1A
Brand
General Electric
Origin
United States
Weight
Not specified
Dimensions
Not specified
Operating Temp
-30 to +65 deg C
Power Consumption
Not specified
Series
EX2100
Product Type
Exciter Ground Detector Module
Board Format
Double‑slot, double‑height (6U) VME board
System Configuration
Simplex (1 module) or TMR (3 modules)
Manual Reference
GEI‑100467
Backplane Bus Communication Velocity Licenses
As part of the EX2100 excitation architecture, the IS200EGDMH1A aligns with deterministic backplane timing through the EPBP rack. Ground‑sensing voltage is measured by the EXAM attenuator module, which communicates with EGDM using fixed propagation windows. The board contains no jumpers, fuses, or cable connectors; all signals are routed through the backplane, ensuring stable I/O density scaling across simplex and redundant excitation systems. Firmware flash compatibility resides entirely in upstream control modules, as EGDM performs passive measurement without embedded logic.
Frequently Asked Questions
Q: What does the IS200EGDMH1A measure? A: It measures generator field‑to‑ground resistance on both ac and dc sides of the field circuit.
Q: How many EGDM modules are used in redundant systems? A: Redundant EX2100 systems use three EGDM modules; simplex systems use one.
Q: Does the board include any configurable hardware? A: No. EGDM is fully fixed‑configuration and relies entirely on backplane wiring.
Field Installation Guidelines
De‑energize the exciter and verify absence of hazardous voltages before handling the board.
Insert and remove the module using both hands to avoid stressing the 6U VME connectors.
Ensure the board seats squarely in the EPBP rack to maintain proper backplane engagement.
Maintain separation between field wiring and high‑energy conductors to reduce noise coupling.
Follow GE installation manuals for grounding and cabinet layout requirements.
In TMR systems, verify all three EGDM modules are properly aligned to maintain synchronous measurement.
