Modular UPS | 400kVA/400kW | 4 Breakers | +/-192VDC~+/-240VDC | 8 x 50KW Power Module
Prostar MPS400K-50K hot-swappable modular data center 400kva ups system designed specifically for modern data centers and critical infrastructure. This 400kVA UPS system is engineered for scalability. It offers efficiency and resilience.
The modular UPS utilizes a hot-swappable modular architecture. This delivers “N+X” redundant power protection. It ensures that your IT load remains online during utility disturbances. It also provides the flexibility to grow your capacity as needed.

True Hot-Swappable Modular Design
The 400kVA UPS system utilizes a modular chassis that houses individual power modules (rated at 50kW/kVA each). If a module fails, the system reduces repair time to zero. Non-technical staff can replace faulty modules on-site in under five minutes. This process does not require transferring the load to bypass or powering down critical IT equipment.
Scalable Capacity (50kW to 600kW)
Start small and invest as you grow. The system allows for capacity upgrades by simply adding 50kW modules into the common frame. This “pay-as-you-grow” model eliminates over-provisioning and reduces the initial capital expenditure.
High Efficiency (Online Mode)
Peak Efficiency: Up to 95.5% in double-conversion mode.
The high efficiency reduces heat dissipation. It lowers cooling requirements and operational costs. As a result, there is a lower TCO (Total Cost of Ownership) and PUE (Power Usage Effectiveness) for your facility.
Fast Transfer & Low Inrush Impact
Sub-millisecond transfer times and soft-start capability reduce downstream stress and maintain uptime for sensitive IT equipment.
LCD Touch Screen
Offers an intuitive user interface for easy monitoring and configuration, along with remote access for convenience and management.
Intelligent Monitoring
Equipped with a smart monitoring system, the modular ups 200kva provides real-time data on power usage, battery status, and overall system health through a user-friendly interface.
Intelligent Battery Management
Integrated battery monitoring, temperature compensation, and support for various battery types (VRLA, Li-ion) extend battery service life.

In the event of a failure, only the specific faulty 50kVA module needs to be replaced, not the entire 400kVA unit. Hot-swappable modules are easier to repair or refurbish individually. This modular approach drastically reduces the volume of e-waste sent to landfills compared to monolithic systems where a single component failure might necessitate scrapping a massive unit.
This modular UPS is designed with 50kVA/50kW power modules, allowing fast installation and flexible upgrades. When a module needs maintenance, it can be replaced quickly. This is possible through a hot-swappable structure, which significantly reduces system downtime. It also helps lower maintenance costs. More details: MPS50K 3 phase modular ups hot-swappable power module 50kW
The MPS300K-50K adopts a 50kVA / 50kW power module design. This design enables flexible system configuration. Capacities range from lower levels up to 600kVA within a single cabinet. Additional cabinets can be paralleled for even higher power demands.
Power module: 50kVA / 50kW
System capacity: Up to 600kVA per cabinet
Parallel expansion capability for large power systems
Hot-swappable power modules without downtime

This modular architecture allows data center operators to invest according to current needs. It maintains the flexibility to expand as business grows.
Redundant design and hot-swappable components allow maintenance without interrupting the protected load, significantly improving system availability.
The 7-inch touch LCD display is integrated into 400kVA ups system. It is a user-friendly, high-resolution capacitive touchscreen interface. This interface is designed to provide intuitive real-time monitoring. It also allows control and configuration of the entire power system.

Intuitive Graphical Interface — Modern, icon-based layout with clear menus, real-time dashboards, and color-coded status indicators (green for normal, yellow for warning, red for fault/alarm).
Real-time Monitoring — Displays critical parameters such as:
Alarm & Event Management — Full fault records, operation logs, and predictive warnings with timestamps; supports detailed alarm descriptions and troubleshooting guidance.
| Item | Specification |
|---|---|
| UPS Type | Modular Online UPS (Double Conversion) |
| Rated Capacity | 400kVA / 400kW |
| Power Factor | 1.0 |
| Power Module | 50kVA / 50kW |
| Phase | 3 Phase In / 3 Phase Out |
| Input Voltage | 380/400/415Vac (optional) |
| Output Voltage | 380/400/415Vac |
| Input Frequency | 50/60Hz, 40Hz ~70Hz |
| Output Frequency | 50/60Hz, 46Hz ~ 54Hz or 56Hz ~ 64Hz |
| Transfer Time | 0ms |
| Battery Voltage | ±192VDC ~ ±240VDC |
| Output Waveform | Pure Sine Wave |
| Efficiency | Utility Mode: 95.5%; ECO Mode: 98.5%; Battery Mode: 94.5% |
| Overload Capacity | 60 mins for 110%, 10 mins for 111%-120%,; 1 min for 121%-150%, 200ms for >150% |
| Display | LCD display |
| Communication | RS232 / RS485 / Dry Contact / SNMP (optional) |
| Parallel Function | Supported |
| Protection | Overload, short circuit, over-temperature, battery low voltage, etc. |
| Application | Data center, telecom, hospital, industrial, banking |



| Model | MPS400K-50K |
| PHASE | 3-phase in/3-phase out |
| CABINET CAPACITY* | 400kVA / 400kW |
| BATTERY TYPE | External Battery |
| POWER MODULE CAPACITY | 50kVA / 50kW |
| MAX. POWER MODULE NO. | 12 |
| SWITCHES NO. | 4 |
| INPUT | |
| Nominal Voltage | 380VAC/400VAC/415VAC (3P+N+PE) |
| Voltage Range | 110-300VAC@50% load; 176-276VAC@100% load |
| Nominal Frequency | 50/60Hz (Auto Sensing) |
| Frequency Range | 40Hz ~70Hz |
| Power Factor | > 0.99 @ 100% Load, >0.98 @ 50% Load |
| Harmonic Distortion (THDi) | < 4% @ 100% load |
| OUTPUT | |
| Nominal Voltage | 380VAC/400VAC/415VAC (3P+N+PE) |
| Voltage Regulation (Steady state) | ≦ ± 1% Typical (balanced load) ; ≦ ± 2% Typical (unbalanced load) |
| Voltage Regulation (Transient) | ≦ ± 5% Typical |
| Nominal Frequency | 50/60Hz |
| Frequency Range (Synchronized) | 46Hz ~ 54Hz or 56Hz ~ 64Hz |
| Overload Capability | 60 mins for 110%, 10 mins for 111%-120%,; 1 min for 121%-150%, 200ms for >150% |
| Harmonic Distortion | ≦2% THD (Linear Load) ; ≦ 4% THD (Non-linear Load |
| Efficiency | Utility Mode: 95.5%; ECO Mode: 98.5%; Battery Mode: 94.5% |
| Crest Factor | 3:1 |
| Wave Form | Pure Sine Wave |
| BATTERY / CHARGER | |
| Nominal Voltage | +/- 192V ~ +/- 240V(Selectable) |
| Maximum Voltage | +/- 240V (12V x 40 pcs) |
| Minimum Voltage | +/- 192V (12V x 32 pcs) |
| Float Charging Voltage | 2.28V / Cell (2.25V ~ 2.33V selectable) |
| Boost Charging Voltage | 2.35V / Cell |
| Temperature Compensation | Yes |
| Max. Charging Current (Per Power Module) | 12A (Adjustable) |
| PHYSICAL | |
| Cabinet Dimension (D x W x H) mm | 1200 x 850 x 2000 |
| Net Weight (Kg) | 565 |
| ENVIRONMENT | |
| Operating Temperature | 0 ~ 40°C |
| Relative Humidity | 0 ~ 95% non-condensing |
| Altitude | <1000m for Nominal power |
| IP Class | IP 20 |
| MANAGEMENT | |
| Smart RS-232/USB | Supports Windows 2000/2003/XP/Vista/2008, Windows 7/8, Linux, Unix, and MAC |
| Optional SNMP | Power management from SNMP manager and web browser |
| STANDARDS | |
| Safety | IEC/EN 62040-1 |
| EMC | IEC/EN 62040-2 Category C3 |