A 300kVA modular UPS system is a scalable and high-efficiency power backup solution designed for modern data centers. It ensures uninterrupted power supply through hot-swappable modules, intelligent redundancy (N+1), and flexible capacity expansion.
Prostar MPS300K-50K large scale data center 300kva modular ups systems designed specifically for large-scale data center environments. This 300kVA modular ups system has a 300 kVA per-module power capacity. It offers flexible 50 kVA incremental scaling. This system delivers reliable and efficient power protection for mission-critical infrastructure. It is also easily serviceable.

300kVA Modular UPS Key Features
Modular Architecture
300 kVA power modules with hot-swappable 50 kVA submodules enable non-disruptive capacity upgrades and simplified maintenance.
High Power Density
Delivers unity output power factor (PF=1.0), meaning 300kVA = 300kW usable power, optimizing space and efficiency in modern data centers.
Hot-Swappable Power Modules
The system utilizes high-density 50 kW (or 50 kVA) intelligent power modules.
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.
Modular Design for Flexible Expansion
In large-scale data centers, uninterrupted power is critical. The MPS300K-50K 300kVA modular ups can provide exceptional system reliability:
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True online double-conversion topology
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N+X redundancy at module level
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Independent control system for each module
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Intelligent load sharing among modules
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Fault isolation to prevent single-point failure
With redundant design and hot-swappable components, you can perform maintenance without interrupting the protected load, significantly improving system availability.
This modular UPS is designed with 50kVA/50kW power modules, allowing fast installation and flexible upgrades. When a module needs maintenance, you can replace it 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
Why Power Reliability Matters in Data Centers
In today’s digital infrastructure, even a few milliseconds of downtime can result in significant financial loss and operational disruption. Data centers require continuous, clean, and stable power to protect critical IT loads.
The 300kVA modular UPS system is engineered to eliminate single points of failure while providing maximum scalability and efficiency.
High Scalability for Growing Data Centers
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.
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Power module: 50kVA / 50kW
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System capacity: Up to 300kVA per cabinet
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Parallel expansion capability for large power systems
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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.
With redundant design and hot-swappable components, maintenance can be performed without interrupting the protected load, significantly improving system availability.
LCD Display
The 7-inch touch LCD display is integrated into 300kVA modular UPS. 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:
- Input/output voltage, current, frequency, and power (kVA/kW)
- Load percentage and crest factor
- Battery voltage, charge/discharge current, remaining runtime, and capacity
- Inverter/bypass/rectifier status
- Module status (each 50 kW power module)
Alarm & Event Management — Full fault records, operation logs, and predictive warnings with timestamps; supports detailed alarm descriptions and troubleshooting guidance.
Technical Specification
| Item | Specification |
|---|---|
| UPS Type | Modular Online UPS (Double Conversion) |
| Rated Capacity | 300kVA / 300kW |
| 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 |
Online UPS Details
System Input Information
Power Module Input Information
Typical Applications
The MPS300K-50K is ideal for:
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Large-scale data centers
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Cloud computing facilities
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Financial and banking institutions
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Telecommunications infrastructure
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Government and enterprise IT systems
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Industrial automation and control centers
Why Choose This 300kVA Modular UPS?
Maximum Uptime
Built-in redundancy ensures uninterrupted operation.
Lower Total Cost of Ownership (TCO)
High efficiency + scalable investment = reduced long-term cost.
Future-Proof Design
Easily expand as your data center grows.
Fast Maintenance
Replace modules without shutting down the system.
FAQ
What is a modular UPS system?
A modular UPS system consists of multiple independent power modules. You can add or replace them without interrupting the system operation.
Why is modular UPS better for data centers?
Because it provides scalability, redundancy, and high efficiency, which are critical for maintaining uptime in data centers.
What does N+1 redundancy mean?
It means the system has one extra module beyond what is required, ensuring backup in case of failure.
Can I expand the UPS capacity later?
Yes, modular UPS systems are designed for easy expansion by adding more power modules.
What is the efficiency of this modular UPS system?
This system achieves up to 96% efficiency, reducing energy consumption and operating costs.
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