IS200EACFG2A - Exciter AC Feedback Board

TECHNICAL SPECIFICATIONS:

Part Number: IS200EACFG2A
Manufacturer: General Electric (GE)
Series: EX2100 / EX2100e
Product Type: Exciter AC Feedback Board
Board Type: Direct-Mount Plug-In Circuit Board
Application: Static Excitation & Generator Voltage Regulation Systems
Functional Group: EACF (Exciter AC Feedback)
Revision: Functional Revision A
Voltage Input: Up to 1000 V RMS +20%, 50/60 Hz
Signal Inputs: Three-Phase Exciter AC Voltage & Air-Core CT/Flux Coil Inputs
Voltage Transformer Output: Nominal 1.6 V RMS
Air-Core CT Input: 0–0.8 V RMS
Connectors: J504, J509 & J514 9-Pin Sub-D Connectors
Terminals: TB1, TB2, TB3 & TB4
Conformal Coating: Yes
System Compatibility: GE EX2100 & EX2100e
Availability: In Stock
Repair Lead Time: 3–7 Days
Country of Origin: United States
Manual Reference: GEI-100465

FUNCTIONAL DESCRIPTION OF IS200EACFG2A:

The IS200EACFG2A is an Exciter AC Feedback Board designed and manufactured by General Electric as part of the EX2100 and EX2100e Series excitation control systems. The EACFG2A Exciter Ac Feedback board (EACF) measures the exciter PPT ac supply voltage and current. The terminal board contains transformers for a three- phase voltage measurement, and terminals for two Flux/Air core coils. The outputs of the voltage and current circuits are fanned out to three DB9 connectors for cables to controllers M1, M2, and C. The cable between EACF and the EBKP backplane board can be up to 90 m in length. The EACF board is located in the exciter auxiliary cabinet. There are two versions of the board, EACFG1 for inputs up to 480 V rms, and EACFG2 for inputs up to 1000 V rms. Refer to the following two figures. High-frequency noise suppression near the point of signal entry is provided for the flux/air core input signals. Cable shield terminal screws attached to chassis ground are located within three inches of the input screws where applicable.

EXCITER VOLTAGE MEASUREMENT:

The G1 version supports a single three-phase input voltage in the nominal range up to 480 V rms +20% at 50/60 Hz. The G2 version supports a single three-phase input voltage in the nominal range up to 1000 V rms +20% at 50/60 Hz. The potential transformers on both boards supply a nominal 1.6 V rms from their secondary outputs.

AIR CORE CT/FLUX COIL INPUTS:

The air-core current transformers deliver a nominal secondary output voltage in the range 0 to 0.8 V rms at 50/60 Hz. The layout of the EACF board is shown in the figure below. T1 through T4 are the three- phase voltage transformers. Individual screw connectors TB1, TB2, and TB3 are for the voltage inputs. Terminal block TB4 is for wiring from the two Flux/Air core coils. The three 9-pin sub-D connectors, J504, J509, and J514 are for cables to the EBKP backplane for the EMIO boards.

WHY BUY FROM WOC

World of Controls keeps an extensive inventory of genuine OEM replacement components for GE EX2100, EX2100e, and Speedtronic control systems. The IS200EACFG2A Exciter AC Feedback Board is available in UNUSED surplus and fully REBUILT conditions, covered by comprehensive warranty protection. Every unit undergoes rigorous inspection and bench-testing by experienced technical personnel to verify scaling accuracy, insulation resistance, frequency response, and physical continuity prior to dispatch. We also offer fast repair and exchange options to support power generation facilities in preventing downtime. Contact our sales team today to check live stock, request a quote, or arrange quick worldwide shipping.

FREQUENTLY ASKED QUESTIONS

What is the GE IS200EACFG2A?

The GE IS200EACFG2A is an Exciter AC Feedback Board used in GE EX2100 and EX2100e static excitation systems. It conditions and scales three-phase generator terminal voltage and current feedback signals from PTs and CTs for processing by digital voltage regulator controllers.

What is the difference between EACFG1A and EACFG2A?

The primary difference is the supported three-phase AC input voltage range. The EACFG1 version is designed for inputs up to 480 V RMS, while the EACFG2 version supports inputs up to 1000 V RMS. Both versions perform AC voltage and current feedback functions within the EX2100 excitation system.

What type of signals does the EACFG2A measure?

The board measures three-phase AC voltage through its voltage transformer circuits and receives current-related feedback from air-core current transformers or flux coils. The air-core CT inputs provide a nominal secondary output of 0–0.8 V RMS at 50/60 Hz. These signals are conditioned and distributed to the associated control electronics.

What are the voltage transformer outputs on the EACFG2A?

The potential transformers on the EACFG2A provide a nominal secondary output of 1.6 V RMS. They are used to scale the higher three-phase input voltage to a level suitable for the excitation control electronics. The EACFG2 configuration is designed for input voltages up to 1000 V RMS +20%.

What are the air-core CT or flux coil inputs used for?

The air-core CT and flux coil inputs provide current-related feedback signals to the EACF board. These inputs have a nominal secondary output range of 0 to 0.8 V RMS at 50/60 Hz. The board includes high-frequency noise suppression near the signal-entry points to help condition these feedback signals.

What terminals are provided for the three-phase voltage inputs?

The EACFG2A uses individual screw connectors TB1, TB2, and TB3 for the three-phase voltage inputs. These terminals interface with the voltage measurement circuits and associated transformers on the board. TB4 is provided for wiring from the two flux/air-core coils.

What connectors are used on the EACFG2A?

The EACF board uses three 9-pin Sub-D connectors identified as J504, J509, and J514. These connectors provide signal connections toward the EBKP backplane and EMIO boards. The voltage and current feedback circuits are fanned out through these connections to the associated controllers.