Technical Specifications Generator voltage sensing: 120–480 V AC, 50/60 Hz; excitation output: up to 10 A DC; supply voltage: 24 V DC; voltage regulation accuracy: ±0.5% steady state; communication: Modbus RTU; operating temperature: -20 °C to +70 °C; enclosure: IP40.
Functional Features Digital PID voltage regulation; soft start voltage build-up; over/under voltage protection; over/under frequency protection; excitation current limiting; power factor control; event and fault logging.
Application Scenarios Industrial synchronous generator voltage control, standby generator excitation systems, cogeneration plant voltage regulation, distributed generation AVR.
Performance Parameters Steady-state voltage regulation: ±0.5%; transient voltage deviation: < ±5% for 50% load step; recovery time: < 300 ms; voltage sensing accuracy: ±0.25%.
Material Composition Sheet steel enclosure, microprocessor control board, power semiconductor output stage, voltage sensing transformers, insulated terminal blocks.
Structural Characteristics Panel mount enclosure; front status LEDs and configuration port; rear terminal block for power, sensing and excitation; mounting ears for panel fixation.
Working Principle The AVR senses generator output voltage, compares it to the programmed setpoint, executes a digital PID control algorithm, and adjusts DC excitation current to the generator field winding to maintain constant generator output voltage under varying load and speed conditions.
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