IS200EDEXG1ADA GE EX2100, De-Excitation Module Main Board

Description:

The IS200EDEXG1ADA Exciter De-Excitation Board, a circuit board product from General Electric, was initially designed and manufactured for integration into the EX2100 Excitation Control System Series. Its full series name indicates that this product plays a specific role within excitation control system processes. Notably, the IS200EDEXG1ADA is not the original product in its functional category within the EX2100 series; that would be the IS200EDEXG1 parent Exciter De-Excitation Board.

Hardware Tips and Specifications:

The IS200EDEXG1ADA model serves as a De-Excitation module, primarily functioning as a bridge and protection board. Its primary purpose is to store energy supplied to the generator, which must be dissipated upon shutdown. It's crucial to understand that the IS200EDEXG1A board is typically controlled by the EXTB. This module provides conduction sensing feedback and voltage retention, ensuring operation even during power failures and enabling SCR de-excitation firing. The SCR de-excitation will fire when two control inputs read true or the anode to cathode voltage of the SCR exceeds a certain value. Currently, two versions of the IS200EDEXG1A are available online for purchase and repair: one group specifically for SCR de-excitation processes, and another more suited for diode de-excitation processes.

Benefits of the IS200EDEXG1ADA include its origin from General Electric, highlighting its adherence to quality manufacturing standards. The IS200EDEXG1A functional product number outlines several hardware details, including:

- EDEX functional product abbreviation
- Normal PCB coating style
- Group one EX2100 Series product grouping
- A-rated primary functional product revision

This board is equipped with Hall effect conduction sensors to detect the magnetic field generated by field current discharge through the thyristor. It receives power from the ESPM module, converting the received 24 VDC power into 125 VDC. Theoretically, the IS200EDEXG1A should be well-protected against voltage issues, given its base printed circuit board is packed with over ten electrolytic drum-style capacitors, among other voltage-limiting components such as resistors, transistors, diodes, and specialized integrated circuits (ICs).

According to the instructional manuals available, the IS200EDEXG1A is a central component of the EX2100 Series' de-excitation module, providing de-excitation firing of silicon-controlled rectifiers, conduction sense feedback, and an additional failsafe layer of voltage protection. It is part of a broader range of General Electric EX2100 or EX2100e Series exciter bridge and protection products, which include various devices like the IS200EXAM Exciter Attenuation Module and crowbar modules. At least some of these products are available in multiple revision versions for both repair and replacement.

Frequently Asked Questions:

1.What are the procedures for shutting down the IS200EDEXG1ADA board?
The IS200EDEXG1ADA board has two methods for shutdown. The first method is a routine shutdown, which involves an operator-initiated stop. During this process, the bridge is activated at its retard limit, providing enough time for the field to gradually diminish before the field contactors are opened. The second method is an emergency abort stop, where the field contactors are immediately disengaged without any delay.

2.Can more than one EDEX module be connected？
Certainly! It is feasible to link multiple de-excitation modules with a single EDEX board set up as the Master, while the additional de-excitation modules are designated as Slave units. When more than one module is connected in this manner, a firing control signal is transmitted to the Master module, which then forwards it to the Slave modules, ensuring that all modules fire at the same time.

3.What are the IS200EDEXG1ADA related products?
IS200EDEXG1A/ IS200EDEXG1ADA/ IS200EDEXG1AFA

Datasheet Link:

IS200EDEXG1ADA GE EX2100, De-Excitation Module Main Board PDF Datasheet