الوصف
The GE IS200EACFG1ABC Exciter AC Feedback Board (EACF) is a specialized printed circuit board used in the GE EX2100 Excitation Control System and is part of the Mark VI Speedtronic series.1
Its primary function is to measure and condition critical Alternating Current (AC) feedback signals from the exciter power system, which is essential for the precise control of large synchronous generators.2
⚙️ Core Functions and Applications
The EACF board acts as the high-accuracy interface between the exciter’s power components and the digital control platform:
- AC Voltage and Current Measurement: It measures the exciter Potential Power Transformer (PPT) AC supply voltage and the current within the bridge supply.3 This feedback is critical for the EX2100 controller to accurately regulate the generator’s output voltage and reactive power.4
- Signal Conditioning: The board uses transformers to safely step down the high AC voltages to a measurable, low-voltage level for the control electronics.5
- Flux/Air Core Coil Inputs: It includes terminals for two Flux/Air core coils (often used for magnetic flux measurement), which provide additional feedback signals necessary for advanced excitation control.6
- Controller Interface: The board sends the measured voltage and current data to the main controllers (typically labeled M1, M2, and C) via three DB9 connectors, integrating the feedback into the system’s control loops.7
🛠️ Technical Specifications (G1 Version)
The G1 designation in the part number indicates a specific voltage range for this board.8
| Feature | Details |
| System | GE EX2100 Excitation Control System (Mark VI Series) |
| Function | Exciter AC Feedback Board |
| Input Voltage Range | Supports nominal AC input voltages up to 480 V rms (+20%) at 50/60 Hz. |
| Primary Components | Contains transformers (T1-T4) for three-phase voltage measurement. |
| Connections | Uses screw connectors (TB1-TB3) for voltage inputs and TB4 for Flux/Air core coils. |
| I/O Interface | Three DB9 connectors (J504, J509, J514) interface with the EBKP backplane for communication with the main controllers. |
| Revision | The suffix G1ABC denotes the voltage range and specific hardware/artwork revisions. |
The EACF board’s reliable and accurate data acquisition is fundamental to the closed-loop control of the exciter bridge (SCR firing), ensuring stable and efficient power generation.9



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+86 15340683922