Description
The GE IS200EGDMH1A is an Exciter Ground Detector Module (EGDM) designed for the GE EX2100 Excitation Control System. It is used to monitor insulation conditions in generator excitation field circuits by detecting leakage resistance between the generator field circuit and ground.
The IS200EGDMH1A mounts in the Exciter Power Backplane (EPBP) rack as a double-slot, double-height (6U) board. It works together with the EXAM attenuator module to measure field ground faults on both AC and DC sides of the excitation circuit, providing important protection monitoring for turbine generator systems.
This GE excitation protection board is commonly applied in power generation plants, including gas turbines, steam turbines, and large synchronous generator systems using GE EX2100 excitation technology. It is available as original new surplus, refurbished, and tested spare inventory for maintenance replacement.
🔹 Product Parameters
| Parameter | Specification |
|---|---|
| Brand | GE (General Electric) |
| Model | IS200EGDMH1A |
| Series | EX2100 Excitation Control System |
| Product Name | Exciter Field Ground Detector Board |
| Functional Acronym | EGDM (Exciter Ground Detector Module) |
| Board Type | Generator Excitation Protection Module |
| Application | Field Ground Fault Detection / Excitation Monitoring |
| Mounting Location | Exciter Power Backplane Rack (EPBP) |
| Communication Interface | Fiber Optic Signal Interface / EISB Communication |
| Power Supply | 24 VDC Control Power |
| Detection Function | Generator Field Leakage Resistance Monitoring |
| Configuration | Simplex or Redundant C/M1/M2 Configuration |
| Dimensions | Approx. 186 × 102 × 40 mm |
| Weight | Approx. 0.5 kg |
| Operating Temperature | Approx. -30°C to +65°C |
| Cooling Method | Natural Air Cooling |
| Origin / Place of Manufacture | USA |
| Product Status | New Surplus / Pre-Owned / Refurbished |
| Compatible Systems | GE EX2100 Excitation Control System |
| Discontinued Status | Legacy Model, Limited Availability |
🔹 Common Questions & Answers
Q: What is the main function of the GE IS200EGDMH1A?
A: The IS200EGDMH1A detects insulation leakage between the generator excitation field circuit and ground, helping protect the excitation system from field ground faults.
Q: Is IS200EGDMH1A a PLC module?
A: No. It is a dedicated excitation protection and monitoring board used in GE turbine generator excitation systems.
Q: Which GE system uses the IS200EGDMH1A?
A: It is mainly used in GE EX2100 excitation control systems and related generator excitation applications.
Q: What equipment does the EGDM monitor?
A: It monitors generator field circuits and detects abnormal leakage resistance to ground on AC and DC excitation circuits.
Q: How many EGDM boards are required in a system?
A: A simplex system typically uses one EGDM board. A redundant configuration can use three boards configured as Controller (C), Master 1 (M1), and Master 2 (M2).
Q: What are common failure symptoms?
A: Typical issues include field ground alarms, excitation system trips, communication faults, abnormal diagnostic LEDs, or incorrect ground detection readings.
Q: What should be checked before replacement?
A: Verify the complete part number, board revision, EPBP rack compatibility, EXAM module connection, fiber communication interface, and system configuration.
🔹 Recommended GE Models
- IS200EGDMH1AAB – EX2100 Exciter Ground Detector Module Variant
- IS200EXAMG1A – Exciter Ground Detection Attenuator Module
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