
The PRO-S 6KVA is a three-phase servo voltage stabilizer built to deliver dependable voltage regulation for small-to-medium installations where mains supply quality cannot be guaranteed. This automatic servo voltage stabilizer spans an input range of 280V – 480V, actively corrects incoming voltage across all three phases, and holds the output at 3×400V within ±1–1.5% accuracy — providing connected equipment with a clean and stable power feed regardless of grid conditions.
Handling up to 8.66A per phase, this electrical stabilizer is designed for efficient continuous operation at up to 98% efficiency. Class H insulation and a low-loss thermal assembly maintain safe internal temperatures throughout extended run times without the need for active cooling. A digital LCD display shows live input and output voltage across all three phases, while eight automated protection functions — overvoltage, undervoltage, overload, short circuit, overtemperature, phase sequence fault, phase failure, and internal bypass — activate instantly when operating parameters are exceeded. A 6-second safe-start delay at every power-on cycle shields downstream equipment from inrush stress.
Compact and floor-standing on industrial castors, this servo stabilizer suits small workshops, retail outlets, telecom equipment rooms, and light commercial air conditioning systems. Connecting via screw-type terminals and rated for ambient temperatures up to 50°C, the PRO-S 6KVA servo voltage stabilizer carries CE, cULus, and TÜV Austria certifications — a fully compliant three-phase electrical stabilizer available across Egypt for commercial and light-industrial applications.
| Specification | Value |
| Rated input voltage | 3 × 400 Vac + Neutral |
| Permissible input tolerance | +20% to −30% (280V – 480V) |
| Rated output voltage | 3 × 400 Vac + Neutral |
| Output accuracy | ±1 – 1.5% |
| Rated power | 3 – 6 KVA |
| Rated current | 4.33 A / 8.66 A |
| Frequency | 50 / 60 Hz |
| Efficiency | Up to 98% |
| Insulation class | Class H |
| Max ambient temperature | 50 °C |
| Protection index | IP23 Indoor |
| Test voltage | 3.5 KV |
| Dimensions (A × B × C) | 38 × 26.5 × 60.5 cm |
| Weight | 21 – 35 KG |
| Terminal | Screw type |
| Fixing method | Floor standing with castors |
| Protection features | Safe Start · Over & Under Voltage · Phase Sequence · Phase Failure · Overload · Short Circuit · Over Heat · Internal Bypass |
| Standards | IEC 61000 · IEC 61558 · IEC 62103 · IEC 60529 |