GE IS200EGDMH1AFF Excitation Field Ground‑Detection Module

Technical Specifications

Model: IS200EGDMH1AFF

Brand: GE（GE Vernova）

Product Type: EGDM excitation field ground‑detection module

Matching System: GE Speedtronic Mark VI, EX2100 generator excitation control system

Installation: Dual‑slot 6U VME board, installed on EPBP excitation power backplane

Power Supply: 24VDC, max power consumption 8.5W

Detection Function: Monitor ground insulation resistance for excitation AC‑side and DC‑side rotor field circuit

Communication: HSSL high‑speed fiber optical link connecting to DSPX main control board

Redundancy Configuration: 1 piece for simplex system; 3 pieces for TMR triple‑modular redundant excitation system

Indicator: On‑board LED for module running status and ground‑fault alarm

Operating Temperature:‑40℃ ~ +70℃, non‑condensing

Humidity:5%‑95% non‑condensing

Protection Class:IP20

Weight:0.50kg

Dimension:340mm ×160mm ×30mm

Compatible System: Gas‑steam turbine generator excitation cabinet

Core Function

EGDM excitation field ground‑detection module for EX2100 excitation system. It injects low‑frequency test signal into generator rotor excitation loop, continuously measures insulation resistance of excitation AC‑DC circuit to ground. When rotor winding, slip‑ring or excitation cable occurs ground leakage fault, it outputs ground‑fault alarm signal and transmits diagnostic data to DSPX controller via HSSL fiber link. It supports simplex and TMR triple‑modular redundant architecture, realizes real‑time online monitoring of rotor ground fault, prevents serious damage caused by single‑point or multi‑point grounding of generator excitation winding.

Product Details

IS200EGDMH1AFF belongs to EGDM series rotor ground‑detection hardware for GE EX2100 excitation control system。

This double‑slot VME board is mounted on EPBP excitation power backplane. The module applies low‑frequency square‑wave test signal to excitation circuit, accurately calculate field‑winding‑to‑ground insulation resistance value. Fault information is transmitted to main controller through HSSL optical fiber, without interfering with normal excitation adjustment operation. On‑board LED indicators directly reflect module working state and ground‑fault alarm condition, convenient for on‑site inspection and fault troubleshooting. Conformal coated circuit board improves anti‑vibration, moisture‑proof and anti‑electromagnetic‑interference performance, adapts to harsh working environment of power‑plant excitation cabinet. Widely deployed in gas‑steam turbine generator excitation cabinets for rotor field ground‑fault online monitoring.

It belongs to critical rotor ground‑monitoring spare‑part for EX2100 excitation system, widely used in overhaul and renovation projects of power generation units.

It is important spare hardware for excitation ground‑fault loop debugging and defective IS200EGDMH1AFF module replacement.