The Qoltec Avr Multiprotection 20 kVA three-phase voltage stabilizer uses SERVO technology, with a servo motor that controls the moving adjustment arm and automatically corrects input voltage fluctuations. It stabilizes the output voltage at 380 V AC with an accuracy of ±3%. Its six-transformer system regulates phases L1, L2 and L3 independently, using three Variac autotransformers and three compensation transformers.

The Multi-Protection system guards against phase and neutral reversal, phase or neutral loss, incorrect phase sequence and overvoltage. The LCD displays real-time voltage and current readings for each phase, along with indicators for undervoltage or overvoltage, overload, overheating, phase loss and delay. It is suitable for three-phase heat pumps, compressors, motors, pumps, production machinery, machine tools, industrial automation systems, refrigeration and air-conditioning equipment, servers, network infrastructure, heating systems and professional electronic devices.

• Type: Servo
• Phases: Three-phase
• Rated power: 20 kVA
• Output voltage: 380 V AC
• Stabilization accuracy: ±3%
• Transformer system: 6 transformers: 3 Variac autotransformers and 3 compensation transformers
• Phase control: Independent control for phases L1, L2 and L3
• Protection: Against phase and neutral reversal, phase or neutral loss, incorrect phase sequence and overvoltage
• Display: LCD with per-phase voltage and current readings, and indicators for undervoltage or overvoltage, overload, overheating, phase loss and delay