The PRO-S 3KVA is a compact three-phase servo voltage stabilizer designed for installations that require balanced, reliable power across all three phases. Built around a precision servo motor stabilizer mechanism, it accepts a three-phase input range of 280V – 480V and delivers a stable 3 × 400 Vac output with an accuracy of ±1–1.5%, with independent phase monitoring ensuring consistent protection across every phase at all times.
Engineered for continuous duty, this automatic servo voltage stabilizer runs at up to 98% efficiency with Class H insulation and natural air cooling that keeps thermal stress under control across extended operating cycles. Harmonic current is held to ≤5% at ohmic load, and this electrical stabilizer performs reliably in ambient temperatures up to 50°C.
Compact and floor-standing at 380 × 265 × 605 mm with a weight starting from 21kg, the PRO-S 3KVA servo stabilizer is straightforward to install and easy to position on site. With an IP23 indoor protection rating, a 3.5KV test voltage, and Class H insulation, it is a dependable three-phase servo voltage stabilizer available across Egypt for any installation where three-phase power quality matters.
| Specification | Value |
| Rated power | 3 KVA |
| Phase | Three Phase |
| Rated current | 4.33 A / 8.66 A |
| Weight | 21 – 35 KG |
| Dimensions (A × B × C) | 380 × 265 × 605 mm |
| Fixing method | Floor standing / Easy installation |
| Rated input voltage | 3 × 400 Vac + Neutral |
| Rated output voltage | 3 × 400 Vac + Neutral |
| Input tolerance | +20% to −30% (280V – 480V) |
| Output accuracy | ±1 – 1.5% |
| Harmonic current | ≤5% at ohmic load |
| Cooling | Natural air / Forced ventilation (large models) |
| Protection degree | IP23 Indoor |
| Environment | Indoor installation |
| Insulation class | Class H |
| Max ambient temperature | 50 °C |
| Efficiency | Up to 98% |
| Frequency | 50 / 60 Hz |
| Test voltage | 3.5 KV |