The Voltrix S20K is a 20 kVA / 18 kW high-frequency online double-conversion (VFI) tower UPS with a built-in maintenance-free VRLA battery (32×12V/7AH). It accepts a three-phase (or single-phase) input and delivers a single-phase output, with an ultra-wide 156 ~ 520 VAC input window, 0 ms transfer time and input power factor above 0.99 — making it suitable for generator sets and unstable grid environments.
Conformal-coating construction protects the electronics in dusty, humid and corrosive environments. A long-backup external-battery-cabinet variant (S20KL) is available separately.
Technical Specifications — S20K — 20 kVA / 18 kW
| INPUT | |
|---|---|
| Topology | Online Double Conversion (VFI) |
| Input Config | 3Φ (L1/L2/L3/N)+PE or 1Φ L/N+PE |
| Nominal Input V | 380 / 400 / 415 VAC (3Φ) |
| Input Voltage Range | 156 ~ 520 VAC |
| Bypass Voltage Range | 310 ~ 450 VAC |
| Input Freq. Range | (40~70) Hz ±0.5 Hz |
| OUTPUT | |
| Output Voltage | 220 / 230 / 240 VAC ±2% |
| Output Freq (Sync) | 50/60 Hz ±4 Hz |
| Output Freq (Fix) | 50/60 Hz ±1% |
| THDv (Lin. / Non-lin.) | < 2% / < 7% |
| Transfer Time | 0 ms |
| Input Power Factor | > 0.99 |
| Output Waveform | Pure Sine Wave |
| EFFICIENCY | |
| Line / ECO / Battery | 94% / >95% / 93% |
| BATTERY & CHARGER | |
| Battery Type | VRLA Sealed Lead Acid |
| Battery Config. | 32×12V/7AH (int.) |
| Battery Voltage | 192 VDC (240V charge) |
| Backup @50% / 100% | ≥ 6 min / ≥ 1.5 min |
| Recharge Time / Curr. | ~5h to 90% / 1.5 A |
| Communication | RS232 + USB / SNMP (opt.) |
| PHYSICAL | |
| Form Factor | Tower |
| Dimensions W×D×H (mm) | 299×698×700 |
| Net / Gross Weight | 88.7 kg / 124.7 kg |
| Acoustic Noise | < 55 dB(A) |
| ENVIRONMENT | |
| Operating Temp. | 0 ~ +40°C |
| Humidity | 5 ~ 97% RH (Non-condensing) |
Key Features
- Online double-conversion (VFI) topology — 0 ms transfer, pure sine wave output
- Three-phase or single-phase input, single-phase output — 3Φ (L1/L2/L3/N)+PE or 1Φ L/N+PE
- Ultra-wide input range 156 ~ 520 VAC, (40~70) Hz ±0.5 Hz — generator compatible
- Input power factor > 0.99
- Efficiency (line / ECO / battery): 94% / >95% / 93%
- Conformal coating — anti-corrosion for harsh environments
- RS232 + USB with SNMP (optional)
Ordering Information
| Voltrix Model | Form Factor | Apparent / Active Power | Battery | Part Number |
|---|---|---|---|---|
| S20K | Tower | 20 kVA / 18 kW | Internal VRLA (32×12V/7AH) | VTX-S20K |
Downloads
Certifications & Warranty
Designed and manufactured under ISO 9001:2015. CE (EU Declaration of Conformity), IEC/EN 62040-1 (UPS Safety), IEC/EN 62040-2 (UPS EMC — Class C2), RoHS 2011/65/EU. 2-year UPS system warranty, return-to-base, parts and labour; 1-year VRLA battery warranty. 24/7 technical support with response within 4 hours.
Specifications subject to change without notice. Backup times are indicative and depend on load, temperature, battery age and discharge history. Voltrix is a registered brand of Heizka. All trademarks are property of their respective owners.
