Three Phase Servo Voltage Stabilizer - PRO-S Series | 15KVA

The PRO-S 15KVA Three Phase servo voltage stabilizer keeps three-phase electrical systems running within safe voltage parameters regardless of mains supply conditions. Covering an input range of 280V – 480V, it continuously corrects any deviation and holds the output at a stable 3×400V with ±1–1.5% accuracy — protecting equipment from fluctuations, surges, and brief interruptions without any manual adjustment.

With a 15KVA rating and up to 21.65A per phase, the unit is built for sustained operation in high-demand environments. Efficiency reaches up to 98%, supported by Class H insulation and a low-loss thermal design that prevents heat accumulation over long duty cycles. Eight protection layers — overvoltage, undervoltage, overload, short circuit, overtemperature, phase sequence fault, phase failure, and internal bypass — operate automatically, while a smart digital LCD display keeps voltage readings across all phases visible at all times. A 6-second safe-start delay activates at every power-on cycle to protect downstream equipment from inrush stress.

The PRO-S 15KVA Three Phase is a practical fit for pumping stations, food processing lines, commercial refrigeration, multi-unit air conditioning, and heavy workshop machinery. Mounted on industrial castors and rated for use up to 50°C, it connects via screw-type terminals and is certified to CE, cULus, and TÜV Austria standards.

Technical Specifications (PRO-S 15KVA – Three Phase)