Technical Specifications Generator and busbar input: 120–480 V AC, 50/60 Hz; output: 4–20 mA bias signal to AVR; voltage matching dead band: 0.2–3% adjustable; sensing accuracy: ±0.25% full scale; supply voltage: 24 V DC ±10%; output load limit: 1000 Ω maximum; operating temperature: -20 °C to +70 °C; enclosure: IP20.
Functional Features Precision generator-busbar voltage comparison; proportional 4–20 mA bias output; adjustable dead band; over/under voltage limit detection; zero output at match condition; reverse polarity protection.
Application Scenarios Generator paralleling voltage matching, AVR bias control for synchronization, multi-generator voltage trimming, standby generator voltage matching, synchronizing system voltage loop.
Performance Parameters Voltage matching accuracy: ±0.25% of setpoint; output linearity: ±0.5% full scale; response time: < 150 ms; temperature drift: < 0.02% per °C.
Material Composition Industrial plastic housing, precision matched voltage transformers, differential amplifier circuit, 4–20 mA output driver, screw terminal connectors.
Structural Characteristics Compact rack plug-in module; front status LED; rear screw terminal block; standard mounting footprint.
Working Principle The module measures both generator and busbar RMS voltage, calculates the difference, and outputs a proportional 4–20 mA bias signal to the AVR to raise or lower generator excitation until voltages match within the preset dead band.
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