IS200EACFG1ABB - Exciter AC Feedback Board

SPECIFICATIONS:

Part Number: IS200EACFG1ABB
Manufacturer: General Electric
Series: EX2100
Product Type: Exciter AC Feedback Board
Number of Channels: 24
Frequency: 50 Hz / 60 Hz
Input Current: 124 V dc
Power supply voltage: 28 V dc
Output Connectors: 3 × DB9 connectors
Maximum Cable Length: 90 meters
PT Secondary Output: 1.6 V rms
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: 0°C to 60°C
Size: 33.02 cm high x 10.16 cm
Repair: 3-7 Days
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION:

IS200EACFG1ABB is an Exciter AC Feedback Board manufactured and designed by General Electric as part of the EX2100 Series used in GE Excitation Control Systems. The IS200EACF 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. The two board versions are designed to accommodate different system voltage levels:

• G1 Version: This version is rated for a single three-phase input voltage with a nominal value up to 480 V rms, capable of handling up to +20% overvoltage. It is compatible with both 50 Hz and 60 Hz power systems, making it suitable for a wide range of industrial and utility applications.

• G2 Version: The G2 variant supports a higher voltage range, with a single three-phase input voltage up to 1000 V rms, also accommodating +20% overvoltage at 50/60 Hz. This version is intended for high-voltage excitation systems.

OPERATION:

The IS200EACF board continuously monitors the exciter AC supply voltage and current, providing real-time feedback to the GE Excitation Control System. The board receives signals from the three-phase voltage inputs and flux/air-core coils, and processes them through its internal measurement and isolation circuitry. Voltage inputs are stepped down by potential transformers (PTs) to a nominal 1.6 V rms, ensuring safe and accurate measurement. The current inputs from the flux/air-core coils are filtered to suppress high-frequency noise, preventing interference with control signals. The processed signals are then routed via three DB9 connectors to the system controllers (M1, M2, and C), where they are used for excitation regulation, system protection, and performance monitoring.

The board can handle long cable runs (up to 90 meters) without signal degradation, thanks to robust design and careful grounding of cable shields near the input terminals. By maintaining precise voltage and current measurements, the EACF board ensures stable exciter operation, optimal turbine performance, and protection of both the generator and excitation system components.

WOC maintains the largest stock of OEM replacement parts for GE Excitation Control Systems, including brand-new, unused components as well as professionally rebuilt boards, all backed by a comprehensive warranty. We also offer expert repair services for damaged or malfunctioning boards, restoring them to full operational performance. Our team of specialists is available 24/7 to support all OEM needs, providing technical guidance, system compatibility advice, and tailored automation solutions. For inquiries regarding pricing, availability, or repair services, contact our team via phone or email to keep your systems running reliably and efficiently.

FREQUENTLY ASKED QUESTIONS:

What is the function of the EACF board?

The EACF board measures the exciter AC supply voltage and current. It processes these signals and provides feedback to the EX2100 Excitation Control System. This ensures accurate voltage regulation and stable generator operation.

Where is the board installed?

The board is located in the exciter auxiliary cabinet. Outputs are routed to controllers via DB9 connectors. It integrates directly with the EX2100 system for real-time monitoring.

How are outputs routed?

The board outputs are fanned out to three DB9 connectors for controllers M1, M2, and C. This allows simultaneous monitoring by multiple controllers. Voltage and current signals are transmitted without degradation over the designed cable length.