Holdvolt X33
High-Power Industrial UPS, 300–800 kVA
Large-frame transformer-based systems for whole plants and process buildings, built per project.
- 300–800kVA
- Cabinet
- 6 / 12
- Pulse rectifier
- ≥0.97
- Input power factor
- 98%
- ECO mode, up to
How it works
Double conversion, then an isolation transformer before the load.
- 0 ms
- mains to battery
- Isolation
- galvanic, inverter to load
- Neutral
- re-established at the transformer
Rectifier
- 6-pulse
- 12-pulse
- Harmonic filter (option)
Isolation
- Output isolation transformer
Control
- RS-232 / RS-485
- Dry contacts
- SNMP (option)
Specifications
Factory catalog values, model by model.
300–800 kVA
| Model | X33-300K | X33-400K | X33-500K | X33-600K | X33-800K |
|---|---|---|---|---|---|
| Other | |||||
| Capacity | 300kVA | 400kVA | 500KVA | 600KVA | 800kVA |
| Output isolation transformer | Built-in (from product introduction / features) | ||||
| Capacity | 300KVA/270KW | 400KVA/360KW | 500KVA/450KW | 600KVA/540KW | 800KVA/720KW |
| Input | |||||
| Wiring method | 3Ph+N+PE | ||||
| Rated input voltage | 380/400/415Vac±25% | ||||
| Input frequency range | 45–55Hz/55–65Hz | ||||
| Power factor | ≥0.97 | ||||
| Rectifier pulse | 6 pulse / 12 pulse | 6 pulse / 12 pulse | 12 pulse | 12 pulse | 12 pulse |
| Rated voltage | 380/400/415VAC 3Ph+N+PE | ||||
| Rated frequency | 50/60Hz | ||||
| Voltage range | ±15%; ±25% (optional) | ||||
| Frequency range | 45-65Hz | ||||
| Input power soft start | 0–100%, 5–300s adjustable | ||||
| Power factor | >0.98 (with filter) | ||||
| THDi | <4.5% (with filter) | ||||
| Bypass | |||||
| Wiring method | 3Ph+N+PE | ||||
| Input frequency | 50/60Hz | ||||
| Frequency range | ±2 (±0.5, ±1, ±2, ±3 optional) | ||||
| Voltage range | ±15%; ±25% (optional) | ||||
| Frequency range | 50/60Hz±10% | ||||
| Max. static bypass current | Bypass current capacity: 1000% for 100 ms | ||||
| Output | |||||
| Rated output voltage | 380/400/415Vac±1% | ||||
| Output frequency | automatic tracking of input frequency | ||||
| Waveform | Sine wave | ||||
| Power factor | 0.8 or 0.9 | ||||
| Output voltage harmonics | ≤1%(100% linear load) | ||||
| Crest factor | 3:1 (MAX.) | ||||
| Inverter voltage | 380/400/415VAC 3Ph+N+PE | ||||
| Voltage regulation | ±1% (steady-state); ±3% (transient) | ||||
| Output frequency | 50/60Hz | ||||
| Frequency (battery mode) | 50/60Hz±0.05Hz | ||||
| Power factor | PF 0.9 (90 kW per 100 kVA) | ||||
| Steady-state response time | <5ms | ||||
| Phase shift | Balanced load <1°, 100% unbalanced load <1° | ||||
| THDv | 100% linear load <1%; 100% non-linear load <3% | ||||
| Overload | |||||
| Overload capacity | Bypass activation at ≤110% load for 60 minutes; at ≤125% load for 10 minutes; and at ≤150% load for 1 minute. | ||||
| Overload capability | At PF 0.9: 110% 1 h; 125% 10 min; 150% 1 min | ||||
| Short-circuit current limiting | 3-phase: 150% for 5 s; Single-phase: 290% for 5 s | ||||
| Efficiency | |||||
| Efficiency | ≥93% | ||||
| System efficiency (full load) | Up to 94%; ECO mode up to 98% | ||||
| Battery | |||||
| Battery voltage | 360–408Vdc | 360–408Vdc | 480Vdc | 480Vdc | 480Vdc |
| DC voltage regulation (charging) | 1% | ||||
| Battery voltage | 384VDC | 384VDC | 480VDC | 480VDC | 480VDC |
| Display & communication | |||||
| Display | Input and output voltage, frequency, capacity, battery voltage, current, battery status, load percentage, UPS status, record | ||||
| Communication | RS232, RS485, dry contact, SNMP (optional) | ||||
| Environment | |||||
| Operating temperature | 0–40°C | ||||
| Storage temperature | -25-55 (No battery included) | ||||
| Altitude | < 1000m (non-condensable) | ||||
| Relative humidity | 0–95% (non-condensing) | ||||
| Noise (1 m in front) (dB) | <72dB | <72dB | <75dB | <75dB | <75dB |
| Operating temperature | 0–40°C | ||||
| Relative humidity | 0–95% RH (non-condensing) | ||||
| Storage temperature | -25–70°C (no battery) | ||||
| Altitude | ≤ 1000 m at rated load; above 1000 m, derate load by 1% per 100 m | ||||
| Noise (1 m in front) | 55–65dB | ||||
| IP rating | IP20 | ||||
| Physical | |||||
| Dimensions (D×W×H) mm | 1000*1400*1900 (6 pulse); 1000*1640*1900 (12 pulse) | 1000*1400*1900 (6 pulse); 1000*1640*1900 (12 pulse) | 1000*2580*1900 (12 pulse) | 1040*2800*1900 (12 pulse) | 1040*2800*1900 (12 pulse) |
| Net weight (kg) | 1560 (6 pulse); 2395 (12 pulse) | 1640 (6 pulse); 2510 (12 pulse) | 3510 (12 pulse) | 3950 (12 pulse) | 5000 (12 pulse) |
| Weight (kg) | 1600 | 2100 | 3890 | 4160 | 5390 |
| Dimensions (W×D×H) mm | 1400X1100X2000 | 1640X850X1900 | 2938X1100X1900 | 2938X1100X1900 | 3955X1100X1900 |
Factory values. Specifications may change; confirm against the quotation.Swipe the table sideways.
Where it fits
Applications and guides for this range.
Manufacturing
A half-second dip can stop a line, scrap a batch and reset every PLC. We size industrial and online UPS systems for controls, drives and process loads, not just the office IT room.
ApplicationOil, Gas and Petrochemical
Control systems, safety instrumentation and telemetry must stay powered through grid faults and generator changeovers. We build transformer-based UPS systems for the electrical and control rooms of process sites.
GuideIndustrial Isolation Transformer UPS: When Galvanic Isolation Matters
An isolation transformer breaks the direct conductive path between mains and load. In an industrial uninterruptible power supply it lets you create a clean new neutral, block common-mode noise and ride out the earthing problems that high-frequency units pass straight through.
GuideTransformer-Based vs Transformerless Online UPS: How to Choose
Choose a transformer-based online UPS for motors, heavy inrush, poor or generator-fed supplies and sites that need galvanic isolation. Choose a transformerless high-frequency unit for IT, control and electronic loads where size and efficiency count for more.
Questions buyers ask
What do you need for a quotation?
Load in kVA or kW, input voltage and phases, output phases, the backup time you need and where the unit will be installed. If you are unsure, send what you know and we will ask for the rest.
Can the unit carry our brand?
Yes. Logo, front panel, packaging and manual can be supplied under your brand. Minimum quantities and lead times are on the OEM / ODM page.
More in Industrial UPS
Five numbers get you a quote
Send what you know. We reply within one working day.
- LoadkVA or kW, and what it is
- Input voltage and phasese.g. 400 V three-phase, 50 Hz
- Output phasesSingle- or three-phase
- Backup timeMinutes at full or typical load
- SiteIndoor, temperature, altitude, generator