The IS200EXAMG1A is a specialized Exciter Attenuator Module (EXAM) designed for the GE EX2100 Excitation Control system. This module functions as a critical bridge and protection component, driving the electrical center for field windings with a low-frequency AC voltage relative to ground. It is primarily deployed in large-scale power generation and heavy industrial excitation systems to detect field ground leakage currents. By working in conjunction with the EGDM module, the IS200EXAMG1A enables precise identification of insulation breakdown, facilitating proactive maintenance and reducing the risk of generator failure.
Features
Supports high-reliability redundant configurations with M1 and M2 controller switching.
Integrated precision sense resistor for field ground leakage detection.
Hardware-level configuration via three onboard jumpers (JP1, JP2, JP3).
Robust connectivity including high-current stab-on connectors for Vbus-p (E1) and Vbus-n (E2).
Designed for integration within the EX2100 auxiliary cabinet architecture.
Applications
Large-scale power generation excitation control.
Gas turbine control systems.
Generator field ground fault monitoring and protection.
Technical Specifications
Model
IS200EXAMG1A
Series
EX2100 Excitation Control
Board Type
Exciter Attenuator Module (EXAM)
Operating Temperature
0 to 60 deg C
Storage Temperature
-40 to 85 deg C
Humidity
5 to 95% RH (non-condensing)
Manual References
GEI-100509 / GEH-6632
Installation Guidelines
Ensure the system is fully de-energized before installing or removing the module.
Handle the module using proper ESD (Electrostatic Discharge) mitigation techniques to prevent damage to sensitive internal circuitry.
Verify that all cable connections, including the 9-position ground detector cable and high-current stab-on connectors (E1/E2), are securely seated.
Configure jumpers JP1, JP2, and JP3 according to the specific site requirements defined in the GEI-100509 manual.
Ensure the module is installed in an environment compliant with the specified temperature and humidity ranges to prevent premature component degradation.
FAQ
What is the primary function of the IS200EXAMG1A?
The IS200EXAMG1A acts as an attenuator and bridge module that injects a low-frequency AC voltage into the generator field winding to detect insulation degradation or ground leakage currents in the EX2100 system.
Does this module support redundant control systems?
Yes, the IS200EXAMG1A is designed to support redundant M1 and M2 controller configurations, allowing for seamless test signal processing.
