GE IS200EXAMG1ABB Exciter Attenuator Module

الوصف

The GE IS200EXAMG1ABB Exciter Attenuator Module (often abbreviated as EXAM) is a specialized component used within GE’s EX2100 Excitation Control Systems for large industrial generators, such as those in gas and steam turbines.

🛠️ Primary Function

The core function of the IS200EXAMG1ABB is to work in tandem with the Exciter Ground Detector Module (EGDM) to detect field ground leakage currents in the generator’s excitation winding.

It performs this by:

• Attenuation and Scaling: Sensing the high voltage from the excitation bridge and scaling or attenuating it to a lower, usable voltage level for the EGDM.
• Signal Processing: Processing low-frequency signals emitted by the EGDM and directing them to a sense resistor.
• Ground Detection: The voltage across this sense resistor is then picked up by the EXAM and sent back to the EGDM for measurement, allowing the system to identify the presence of unwanted ground paths that could cause thermal or magnetic damage to the generator’s rotor.

Essentially, the EXAM acts as an interface to protect the generator and its associated components by ensuring the stability and integrity of the excitation process.

⚙️ Key Specifications and System

• Type: Exciter Attenuation Module (Bridge and Protection Board).
• System: Part of the GE EX2100 Excitation Control System (often associated with the Mark VI/VIe series).
• Application: Manages and optimizes the performance of excitation systems for large industrial generators.
• Mounting Location: Typically mounted in the Auxiliary Cabinet of the control system.
• Compatibility: Works directly with the IS200EGDM (Exciter Ground Detector Module).