GE IS200EGDMH1A Exciter Ground Detector Module

GE IS200EGDMH1A Exciter Ground Detector Module: Comprehensive Product Overview

The GE IS200EGDMH1A is a critical protective component of GE’s EX2100 excitation control system, 

engineered to detect field leakage resistance between any point in the generator’s AC or DC field 

circuit and ground—preventing catastrophic failures like winding burnout or system trips caused by 

ground faults . As a double-slot, 6U form factor board, it mounts in the Exciter Power Backplane Rack 

(EPBP) and operates in tandem with the EXAM (Attenuator Module), which senses voltage across 

ground sense resistors and transmits signals to the EGDM via a nine-conductor cable . In simplex 

systems, one module suffices, while redundant configurations utilize three units designated as 

Controller (C), Master 1 (M1), and Master 2 (M2)—configured via program pins on the P2 connector 

and communicating with the DSPX module through the EISB via fiber-optic links for low-latency data 

transmission . The module features an isolated power supply for personnel safety amid high common-

mode voltages, a signal conditioner with high common-mode rejection ratio (CMRR), and built-in 

diagnostics to monitor circuit health . It supports Modbus TCP/IP for seamless integration with Mark 

VIe DCS and third-party monitoring systems, and its rugged design (conformal-coated PCB, -40°C to 

70°C operating temperature range) ensures reliability in harsh industrial environments like power 

plants, petrochemical facilities, and steel mills .

Detailed Specification Table

Key Functional Features

Early Ground Fault Detection: Identifies insulation degradation (e.g., moisture-induced leakage, winding damage) in the exciter field circuit before it escalates to a short circuit. This prevents unplanned downtime and costly generator repairs.

EMI-Immune Data Transmission: Fiber-optic communication with DSPX ensures ground resistance data is not distorted by EMI from generators, VFDs, or high-voltage power lines—critical for accurate monitoring in industrial environments.

Redundant Reliability: 3-module redundant configuration supports high-availability applications (e.g., base-load power plants). If one master module malfunctions, the Controller automatically switches to the backup, maintaining continuous protection.

Comprehensive Diagnostics:

Self-Monitoring: Checks internal circuits, power supply, and fiber-optic connections. Alerts the Mark VI system to faults (e.g., open EXAM cables, module power loss) via diagnostic codes.

Event Logging: Records ground fault events (timestamp, resistance value, fault type) for post-incident analysis—helps identify root causes (e.g., environmental moisture vs. component failure).

Industrial Durability:

Circuit boards feature conformal coating to resist corrosion, dust, and moisture (compliant with ISA-S71.04 G3 for harsh industrial environments).

Rugged mechanical design withstands turbine vibrations (0.15 mm peak-to-peak, 5–150 Hz) and shock (15 g half-sine wave, 11 ms)—stable performance in turbomachinery environments.

Our Advantages

1.100% Origin goods

2.In stock

3.1-year warranty

4.Timely delivery (1-3working days)

5.Competitive price.

Great benefits

1. lower your support costs

2. Provide on-going availability of automation replacement parts

3. Large number of inventory

4. Support door-to-door inspection

Service

Q1.Quality Guarantee

we give 1 year guarantee to ensure your business.

Q2.MOQ

1 piece

Q3.Payment terms

T/T

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USD,RMB,EUR,GBP

Q5.Package

Shipment port: we export from Xiamen

Q6.Customer Service

24 hours by email