Basler Electric AVC63-4A Automatic Voltage Regulator

The Basler Electric AVC63-4A Automatic Voltage Regulator is a solid-state excitation controller for brushless generator systems, designed to maintain stable output voltage by precisely regulating DC field excitation based on sensed AC output. Key specs include an input voltage range of 85–135 VAC (single-phase sensing/power depending on configuration) and up to 4 A of continuous DC excitation current, with 50/60 Hz operation and closed-loop voltage sensing and field excitation control. Voltage regulation accuracy is typically ±1% or better, and the unit provides protection features such as overexcitation shutdown, frequency compensation, and EMI filtering. Operating from -40°C to +60°C (industrial-grade AVR class range) and mountable panel-mounted or for generator internal mounting, it serves brushless synchronous generator excitation control in diesel generator sets, standby power systems, and industrial alternators. Common replacements include Basler AVC63-4, AVC63-7 series, and Stamford SX460.