Holdvolt M33
Modular Online UPS, 20–600 kVA
Hot-swap power modules in a single cabinet. Pay for today’s load, add modules later, replace one without dropping the load.
- 20–600kVA
- System capacity
- 20/30/50kVA
- Power modules
- N+X
- Module redundancy
- >0.99
- Input PF at full load
- ≤1.5%
- THDv, linear load
- Hot
- Swap modules on line
How it works
Mains lost. The load does not notice.
- 0 ms
- mains to battery
- DC bus
- battery always connected
- Inverter
- load never sees the grid
Modules
- 20 / 30 / 50 kVA
- Hot-swappable
- N+X redundancy
- Centralised bypass
Grid
- Wide input voltage
- 50 / 60 Hz auto-select
- Input PF >0.99
- THDi <3%
Battery
- External battery
- ±216 V nominal
- Temperature compensation
- Shared battery
Control
- Touch screen
- RS-232 / USB
- SNMP (option)
- Dry contacts
Specifications
Factory catalog values, model by model.
Cabinets with 20, 30 and 50 kVA modules
Model = system kVA / module kVA.
| Model | M33-60/20 | M33-120/20 | M33-200/20 | M33-90/30 | M33-120/30 | M33-180/30 | M33-300/30 | M33-300/50S | M33-300/50 | M33-350/50 | M33-400/50 | M33-500/50 | M33-600/50 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Other | |||||||||||||
| Phase | 3P in 3P out | ||||||||||||
| Cabinet capacity | 60KW | 120KW | 200KW | 90KW | 120KW | 180KW | 300KW | 300KW | 300KW | 350KW | 400KW | 500KW | 600KW |
| Power module capacity | 20KVA/20KW | 20KVA/20KW | 20KVA/20KW | 30KVA/30KW | 30KVA/30KW | 30KVA/30KW | 30KVA/30KW | 50KVA/50KW | 50KVA/50KW | 50KVA/50KW | 50KVA/50KW | 50KVA/50KW | 50KVA/50KW |
| Max. power modules | 3 | 6 | 10 | 3 | 4 | 6 | 10 | 6 | 6 | 7 | 8 | 10 | 12 |
| Max. battery module sets | 3 | - | - | 3 | - | - | - | — | — | — | — | — | — |
| Battery | |||||||||||||
| Battery type | External battery | ||||||||||||
| Rated voltage | ±216V(12Vx36cell) | ±216V(12Vx36cell) | ±216V(12Vx36cell) | ±216V(12Vx36cell) | ±216V(12Vx36cell) | ±216V(12Vx36cell) | ±216V(12Vx36cell) | ±192V–±240V (optional) | ±192V–±240V (optional) | ±192V–±240V (optional) | ±192V–±240V (optional) | ±192V–±240V (optional) | ±192V–±240V (optional) |
| Max. voltage | ±240V(12Vx40cell) | ||||||||||||
| Min. voltage | ±192V(12Vx32cell) | ||||||||||||
| Float voltage | 2.25V/Cell | 2.25V/Cell | 2.25V/Cell | 2.25V/Cell | 2.25V/Cell | 2.25V/Cell | 2.25V/Cell | 2.28V/cell (2.25V–2.33V optional) | 2.28V/cell (2.25V–2.33V optional) | 2.28V/cell (2.25V–2.33V optional) | 2.28V/cell (2.25V–2.33V optional) | 2.28V/cell (2.25V–2.33V optional) | 2.28V/cell (2.25V–2.33V optional) |
| Equalize voltage | 2.35V/Cell | ||||||||||||
| Temperature compensation | Supported | ||||||||||||
| Max. charging current | 6A | 6A | 6A | 8A | 8A | 8A | 8A | 12A (adjustable)per power module | 12A (adjustable)per power module | 12A (adjustable)per power module | 12A (adjustable)per power module | 12A (adjustable)per power module | 12A (adjustable)per power module |
| Input | |||||||||||||
| Rated voltage | 3×380VAC/400VAC/415VAC(3Ph+N) | 3×380VAC/400VAC/415VAC(3Ph+N) | 3×380VAC/400VAC/415VAC(3Ph+N) | 3×380VAC/400VAC/415VAC(3Ph+N) | 3×380VAC/400VAC/415VAC(3Ph+N) | 3×380VAC/400VAC/415VAC(3Ph+N) | 3×380VAC/400VAC/415VAC(3Ph+N) | 3x 380/400/415 VAC(3Ph+N) | 3x 380/400/415 VAC(3Ph+N) | 3x 380/400/415 VAC(3Ph+N) | 3x 380/400/415 VAC(3Ph+N) | 3x 380/400/415 VAC(3Ph+N) | 3x 380/400/415 VAC(3Ph+N) |
| Voltage range | 100%load305–478VAC;<70%load208–304VAC | 100%load305–478VAC;<70%load208–304VAC | 100%load305–478VAC;<70%load208–304VAC | 100%load305–478VAC;<70%load208–304VAC | 100%load305–478VAC;<70%load208–304VAC | 100%load305–478VAC;<70%load208–304VAC | 100%load305–478VAC;<70%load208–304VAC | -20%–+15% | -20%–+15% | -20%–+15% | -20%–+15% | -20%–+15% | -20%–+15% |
| Rated frequency | 50/60Hz(autoselect) | 50/60Hz(autoselect) | 50/60Hz(autoselect) | 50/60Hz(autoselect) | 50/60Hz(autoselect) | 50/60Hz(autoselect) | 50/60Hz(autoselect) | 50/60Hz (auto select) | 50/60Hz (auto select) | 50/60Hz (auto select) | 50/60Hz (auto select) | 50/60Hz (auto select) | 50/60Hz (auto select) |
| Frequency range | 40-70Hz | 40-70Hz | 40-70Hz | 40-70Hz | 40-70Hz | 40-70Hz | 40-70Hz | 40Hz–70Hz | 40Hz–70Hz | 40Hz–70Hz | 40Hz–70Hz | 40Hz–70Hz | 40Hz–70Hz |
| Power factor | 100%load>0.99;50%load>0.98 | 100%load>0.99;50%load>0.98 | 100%load>0.99;50%load>0.98 | 100%load>0.99;50%load>0.98 | 100%load>0.99;50%load>0.98 | 100%load>0.99;50%load>0.98 | 100%load>0.99;50%load>0.98 | 100%load>0.99, 50%load>0.98 | 100%load>0.99, 50%load>0.98 | 100%load>0.99, 50%load>0.98 | 100%load>0.99, 50%load>0.98 | 100%load>0.99, 50%load>0.98 | 100%load>0.99, 50%load>0.98 |
| THDi | <3%@100%load | <3%@100%load | <3%@100%load | <3%@100%load | <3%@100%load | <3%@100%load | <3%@100%load | <4%@100%load | <4%@100%load | <4%@100%load | <4%@100%load | <4%@100%load | <4%@100%load |
| Output | |||||||||||||
| Rated voltage | 3x380VAC/400VAC/415VAC(3Ph+N) | 3x380VAC/400VAC/415VAC(3Ph+N) | 3x380VAC/400VAC/415VAC(3Ph+N) | 3x380VAC/400VAC/415VAC(3Ph+N) | 3x380VAC/400VAC/415VAC(3Ph+N) | 3x380VAC/400VAC/415VAC(3Ph+N) | 3x380VAC/400VAC/415VAC(3Ph+N) | 3x380/400/415 VAC(3PH+N) | 3x380/400/415 VAC(3PH+N) | 3x380/400/415 VAC(3PH+N) | 3x380/400/415 VAC(3PH+N) | 3x380/400/415 VAC(3PH+N) | 3x380/400/415 VAC(3PH+N) |
| Voltage regulation (steady state) | ≤ ± 1%typ. (balanced load) ; ≤ ± 2% typ.(unbalanced load) | ||||||||||||
| Voltage regulation (dynamic) | ≤±5%typ. | ≤±5%typ. | ≤±5%typ. | ≤±5%typ. | ≤±5%typ. | ≤±5%typ. | ≤±5%typ. | — | — | — | — | — | — |
| Rated frequency | 50/60Hz | ||||||||||||
| Frequency range (sync range) | 46Hz–54Hz or 56Hz–64Hz | ||||||||||||
| THD | ≤ 1.5% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 1.5% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 1.5% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 1.5% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 1.5% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 1.5% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 1.5% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 2% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 2% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 2% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 2% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 2% THD (linear load) ;≤ 4% THD (non-linear load) | ≤ 2% THD (linear load) ;≤ 4% THD (non-linear load) |
| Overload | |||||||||||||
| Overload capability | ≤110% 1 h; 111–125% 10 min; 126–150% 1 min; >150% 200 ms | ||||||||||||
| Efficiency | |||||||||||||
| Efficiency | Up to 94.5% | Up to 94.5% | Up to 94.5% | Up to 94.5% | Up to 94.5% | Up to 94.5% | Up to 94.5% | 95.50% | 95.50% | 95.50% | 95.50% | 95.50% | 95.50% |
| Physical | |||||||||||||
| Cabinet dimensions (D×W×H) mm | 1100x514x763 | 1000×600×1475 | 1000×600×2010 | 1100×514×763 | 1100×600×1475 | 1100x600x1475 | 1000×600×2010 | 850x600x2010 | 1065x 600×2010 | 1065x 600×2010 | 1065x 600×2010 | 1065x 1000×2010 | 1065x 1000x 2010 |
| Cabinet weight (kg) | 182 | 434.5 | 625 | 183.5 | 335 | 437.5 | 620 | 490 | 545 | 654 | 932 | 1020 | 1130 |
| Environment | |||||||||||||
| Working environment / operating temperature | 0–40°C;0–95%RH (non-condensing) | 0–40°C;0–95%RH (non-condensing) | 0–40°C;0–95%RH (non-condensing) | 0–40°C;0–95%RH (non-condensing) | 0–40°C;0–95%RH (non-condensing) | 0–40°C;0–95%RH (non-condensing) | 0–40°C;0–95%RH (non-condensing) | 0–40 °C | 0–40 °C | 0–40 °C | 0–40 °C | 0–40 °C | 0–40 °C |
| Relative humidity | — | — | — | — | — | — | — | 0–95% RH (non-condensing) | 0–95% RH (non-condensing) | 0–95% RH (non-condensing) | 0–95% RH (non-condensing) | 0–95% RH (non-condensing) | 0–95% RH (non-condensing) |
| Altitude | <1000m rated power | <1000m rated power | <1000m rated power | <1000m rated power | <1000m rated power | <1000m rated power | <1000m rated power | < 1,000 m at rated power; above 1,000 m, derate output power by 1% per 100 m | < 1,000 m at rated power; above 1,000 m, derate output power by 1% per 100 m | < 1,000 m at rated power; above 1,000 m, derate output power by 1% per 100 m | < 1,000 m at rated power; above 1,000 m, derate output power by 1% per 100 m | < 1,000 m at rated power; above 1,000 m, derate output power by 1% per 100 m | < 1,000 m at rated power; above 1,000 m, derate output power by 1% per 100 m |
| IP rating | IP20 | ||||||||||||
| Display & communication | |||||||||||||
| RS-232/USB | Supports Windows, Linux and macOS | ||||||||||||
| SNMP (optional) | Power management: supports SNMP and network management. | ||||||||||||
Factory values. Specifications may change; confirm against the quotation.Swipe the table sideways.
Where it fits
Applications and guides for this range.
Data Centers
Data center power has to grow with the racks and stay up while you service it. We supply modular, rack-mount and lithium-ion online UPS systems from server room to full data hall.
ApplicationHealthcare
Imaging systems, lab analyzers and hospital IT react badly to dips and outages. We size double-conversion online UPS systems for individual devices up to whole hospital wings.
ApplicationTelecom
Telecom and network sites run unattended, often on unstable rural supplies. We supply rack-mount, modular and lithium-ion online UPS systems that keep links up and report problems remotely.
GuideHow to Size an Online UPS: kVA, kW, Inrush and Battery Runtime
Sizing a UPS system is two jobs: choose a power rating that carries the load with margin, then a battery that carries it for long enough. Here is a method and a worked estimate; for a real project, ask us for a calculation.
GuideWhat Is a Modular UPS? Frames, Hot-Swap Modules and N+X
A modular UPS is one cabinet holding several identical power modules that share the load, the bypass and the battery. You add modules as the load grows, carry a spare for resilience, and swap a failed module without taking the load off line.
Questions buyers ask
How does N+X redundancy work?
You install more modules than the load needs (N). If one module fails, the others carry the load and the failed module can be replaced while the system keeps running.
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.
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.
More in Modular 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