Precision Voltage Sensing for EX2100 Excitation Systems
The GE IS200EACFG2A serves as a dedicated AC feedback board within the EX2100 excitation control series. This board monitors three-phase AC voltage and current signals from the generator stator and field windings. Its compact PCB measures 230 mm in length, 160 mm in width, and 30 mm in depth, fitting standard EX2100 rack slots. The total weight reaches approximately 0.45 kg, making it a lightweight yet critical component in the excitation chain.
This feedback board provides six analog input channels for comprehensive power system monitoring. The following table details the complete technical specifications for this excitation feedback solution:
| Parameter | Specification |
|---|---|
| Product Brand | GE General Electric |
| Product Model | IS200EACFG2A |
| Product Category | Excitation Controller AC Feedback Board |
| Platform Compatibility | EX2100 Excitation System |
| Number of Analog Inputs | 6 (3-phase voltage, 3-phase current) |
| Voltage Input Range | 0-120 V AC (phase-to-neutral) |
| Current Input Range | 0-5 A AC (from CTs) |
| Input Frequency | 50/60 Hz |
| Resolution | 16-bit |
| Dimensions (L x W x D) | 230 mm x 160 mm x 30 mm |
| Weight | 0.45 kg |
| Supply Voltage | 5 V DC, ±15 V DC (from backplane) |
| Power Consumption | 3.0 W typical |
| Isolation Voltage | 2500 V AC (field-to-logic) |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -40°C to +85°C |
Signal Conditioning and Measurement Accuracy
The IS200EACFG2A processes voltage signals from 0 to 120 V AC phase-to-neutral and current signals from 0 to 5 A AC from current transformers. Precision resistor dividers and burden resistors scale these signals to levels suitable for the onboard ADC. This conditioning ensures accurate representation of generator electrical parameters. The board then converts these conditioned signals using a 16-bit successive approximation converter.
Protection Circuits and Overvoltage Tolerance
Built-in transient suppression diodes protect the analog inputs from voltage spikes and surge events. Series resistors limit fault currents during accidental overvoltage conditions on the sensing lines. The board also includes anti-aliasing filters to remove high-frequency noise from the measured signals. These filters ensure that the control software receives clean, reliable data for regulation algorithms.
System Integration and Communication Interface
The feedback board communicates with the EX2100 main controller through the VME backplane bus. This interface transfers digitized voltage and current data at a rate of 100 samples per second. The module also provides optically isolated outputs for status signaling and fault annunciation. Engineers can therefore integrate this board seamlessly into existing excitation control cabinets.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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