GE IS200EGDMH1A IS200EGDMH1ADE | Exciter Ground Detector

Continuous Ground Fault Detection for Exciter Field Circuits

The GE IS200EGDMH1A IS200EGDMH1ADE monitors the exciter field winding for ground faults. This detector module belongs to the Mark VI series from General Electric. It applies a low-voltage AC injection signal to the field circuit. Therefore, it detects insulation degradation before a second fault causes damage.

Physical Dimensions and Rack Mounting Details

This ground detector module measures 16 cm in width, 12 cm in height, and 3 cm in depth. The GE IS200EGDMH1A IS200EGDMH1ADE weighs approximately 0.28 kg, which supports easy rack installation. Its compact single-board design fits into any standard Mark VI exciter slot. Consequently, you can install it without removing adjacent modules.

Connector Layout and Component Configuration

The GE IS200EGDMH1A IS200EGDMH1ADE features one 34-pin backplane connector for power and signals. It also provides one 6-pin test port for calibration access. This board contains one AC injection transformer and four precision voltage dividers. Additionally, it includes six energy storage capacitors for signal filtering.

Technical Parameter	Specification
Full Model Name	GE IS200EGDMH1A IS200EGDMH1ADE
Manufacturer	General Electric (GE)
Series	Mark VI / EX2100
Product Category	Exciter Field Ground Detector Module
Weight	0.28 kg (0.62 lbs)
Dimensions (W x H x D)	160 mm x 120 mm x 30 mm
Backplane Connector	1 x 34-pin header
Test Port	1 x 6-pin
AC Injection Transformer	1 unit
Precision Voltage Dividers	4 units
Energy Storage Capacitors	6 units (100 µF each)
Total Capacitance	600 µF
Injection Voltage	50 VAC, 60 Hz
Detection Sensitivity	5 kΩ to 50 kΩ
Response Time	100 ms typical
Maximum Field Voltage	600 VDC
Operating Temperature	–20°C to +65°C

Energy Storage and Signal Filtering Performance

The GE IS200EGDMH1A IS200EGDMH1ADE stores enough energy for stable detection readings. Its six capacitors provide 600 µF of total capacitance. This storage filters out noise from the exciter field power. As a result, the module avoids false ground alarms during normal operation.

Role Within the EX2100 Excitation System

You will typically find the GE IS200EGDMH1A IS200EGDMH1ADE in a dedicated monitoring slot. It connects directly across the exciter field winding terminals. Moreover, this module works with both brushed and brushless exciter configurations. Its adjustable sensitivity allows matching to different field insulation levels.

Installation and Calibration Guidelines

Use the GE IS200EGDMH1A IS200EGDMH1ADE as a direct replacement for older EGDM revisions. Always verify that the field circuit is de-energized before installation. This detector module draws power from the backplane connector. It requires a calibration check using the 6-pin test port after installation. Simply secure the board with its ejector tabs and connect the field sense wires to the designated terminals.