Description
The APS-RTx PowerCore Flex PC33 FL 50.0K-E is a high-performance 50kVA / 50kW three-phase online UPS engineered for critical facilities requiring reliable, efficient and scalable power protection.
Using online double-conversion technology, the UPS continuously conditions incoming utility power before supplying the connected load. This protects sensitive equipment from voltage fluctuations, frequency instability and other common power-quality problems while providing zero transfer time from utility to battery operation.
With a 1.0 output power factor, the PC33 FL 50.0K-E delivers its full 50kW of usable active power, making it suitable for modern high-density servers, telecommunications equipment and other demanding electronic loads.
Its advanced three-level inverter topology improves conversion efficiency and reduces switching losses, delivering AC-mode efficiency of up to 95.5%.
The 3-phase input / 3-phase output architecture supports 380V, 400V and 415V electrical systems commonly used in commercial, industrial and data-centre environments.
Despite its high power capacity, the UPS occupies only 4U of rack space and supports rack or tower installation, providing a compact solution for equipment rooms where space efficiency is important.
For installations requiring increased system availability or future expansion, compatible units can be operated in parallel for capacity expansion or N+X redundancy.
The PC33 FL 50.0K-E uses an external battery system, allowing the battery capacity and backup duration to be engineered according to the requirements of each installation.
Key Features
- 50kVA / 50kW rated capacity
- 1.0 output power factor
- Online double-conversion technology
- 3-phase input / 3-phase output
- 380 / 400 / 415VAC operation
- Advanced three-level inverter topology
- AC efficiency up to 95.5%
- High-efficiency ECO operating mode
- Input power factor ≥0.99
- Input THDi ≤3%
- Zero transfer time from utility to battery
- Pure sine-wave output
- Output voltage regulation ±1%
- Compact 4U design
- Rack/Tower installation
- External battery system
- Flexible battery configuration
- Parallel operation supported
- N+X redundancy
- Capacity expansion capability
- Generator compatible
- Intelligent battery management
- LCD status display
- USB communication
- RS232 communication
- RS485 communication
- Intelligent communication slot
- Parallel communication port
- Dry-contact interface
- REPO functionality
- Backfeed protection
- Battery temperature sensor support
- Intelligent fan control
- Overload protection
- Short-circuit protection
- Battery protection
- Over-temperature protection
Typical Applications
Suitable for:
- Data centres
- Enterprise server rooms
- Banking and financial systems
- Telecommunications facilities
- Network infrastructure
- Communications equipment
- Critical business IT systems
- CCTV and security control rooms
- Industrial control systems
- Automation systems
- Laboratory infrastructure
- Medical support systems
- Enterprise IT infrastructure
- Critical commercial facilities
- Mission-critical power applications
Technical Specifications
| Specification | PC33 FL 50.0K-E |
|---|---|
| UPS Technology | Online Double Conversion |
| Rated Capacity | 50,000VA / 50,000W |
| Output Power Factor | 1.0 |
| Inverter Topology | Three-Level |
| Input Phase | 3 Phase + Neutral + Earth |
| Output Phase | 3 Phase + Neutral + Earth |
| Nominal Input Voltage | 380 / 400 / 415VAC |
| Input Operating Range | 138–485VAC |
| Input Power Factor | ≥0.99 |
| Input THDi | ≤3% with linear load |
| Nominal Output Voltage | 380 / 400 / 415VAC |
| Output Voltage Regulation | ±1% |
| Output Frequency | 50 / 60Hz |
| Output Waveform | Pure Sine Wave |
| Crest Factor | 3:1 |
| AC Efficiency | Up to 95.5% |
| Transfer Time – Utility to Battery | 0ms |
| Parallel Operation | Yes |
| Redundancy | N+X Supported |
| Battery Configuration | External Battery System |
| Internal Batteries | None |
| Battery Type | External VRLA Battery System |
| Battery Voltage | Configurable External DC System |
| Maximum Charging Current | 20A |
| Communications | USB, RS232, RS485, Intelligent Slot |
| Parallel Communication | Yes |
| Generator Compatible | Yes |
| REPO | Supported |
| Installation | Rack / Tower |
| Rack Height | 4U |
| Operating Temperature | 0–40°C |
| Humidity | 0–95%, non-condensing |
| Noise Level | <58dB |
External Battery System
The PC33 FL 50.0K-E does not contain internal batteries.
A compatible external battery system is required to provide backup operation during utility failure.
The flexible external battery architecture allows the battery system to be engineered according to:
- Connected load
- Required backup duration
- Battery technology
- Installation environment
- Generator availability
- Required redundancy
- Future expansion requirements
The UPS supports configurable external battery strings, allowing the complete backup system to be tailored to the requirements of each installation.

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