3/1- and 3/3-phase UPS 10-20 kVA

Single-phase and three-phase output UPS for small and medium data centers, servers, network and telecom devices, safety and emergency systems, building automation, medical equipment.

  • Small size and high power density
  • Paralleled solutions up to 120 kVA
  • High autonomy times capability
  • Customization for harsh environment applications
  • Minimum amount of installation space: this series features extremely small dimensions and one of the lowest footprint in its range.
  • Low running cost: high efficiency and ECO mode reduce overall power losses and thus energy costs.
  • No electrical system oversizing: full IGBT technology providing smooth sinusoidal input current cuts all system oversizing costs.
  • Easy commissioning and quick maintenance: removable power modules and simple handling for low installation and service times.
  • Online double conversion UPS, VFI-SS-111 classification as per IEC EN 62040-3.
  • ECO mode and transformer free design for reduced running costs and low environmental impact.
  • Removable power modules architecture, positioning wheels and built-in diagnostics for easy maintenance and extremely low MTTR.
  • Full IGBT technology and electronic PFC, ensuring 0.99 input PF and low THDi for maximum upstream sources compatibility.
  • High power battery charger, giving long autonomy and low charging time.
  • Dual DSP plus microcontroller logics for top performance and reliability.
  • CAN-bus based distributed parallel control ensuring high load sharing accuracy and no single point of failure in parallel systems.
  • Comprehensive set of communication options for total remote monitoring of equipment operation.
  • Fully compliance with all international product standards for maximum quality guarantee.

Tech Specs

B8031FXS/B033FXS: 3/1 - 3/3-phase UPS 10-20 kVA

Rating (kVA) 10 15 20
Nominal power (kW) 9 13.5 18
UPS dimensions WxDxH (mm) 450x670x1200
UPS weight (kg) 100 110 110
UPS weight with internal battery (kg) 247 257 257
External battery module
dimensions WxDxH (mm)
Battery configuration Internal or external, 360 to 372 cells, VRLA (other options)
Max. autonomy with int. battery 70% load (min) 32 19 12


B8031FXS (10-15-20 kVA) B8033FXS (10-15-20 kVA)
Connection type Hardwired 4w (rectifier), 2w (bypass) Hardwired 4w
Nominal voltage 400 Vac 3-phase with neutral (rectifier)
220/230/240 Vac 1-phase (bypass)
400 Vac 3-phase with neutral (rectifier)
380/400/415 Vac 3-phase with neutral (bypass)
Voltage tolerance -20%, +15% (rectifier); +10% (bypass)
Frequency and range 50/60 Hz, 45 to 65 Hz
Power factor 0.99
Current distortion (THDi) <4%


B8031FXS (10-15-20 kVA) B8033FXS (10-15-20 kVA)
Connection type Hardwired 2w Hardwired 4w
Nominal voltage 220/230/240 Vac 1-phase 380/400/415 Vac 3-phase with neutral
Frequency 50/60 Hz
Voltage regulation Static ±1%; dynamic: IEC EN 62040-3 Class 1
Power factor Up to 0.9, without power derating
Overload capacity Inverter: 125% for 10 min, 150% for 30 s, >150% for 10 s;
bypass: 150% continuous, 1000% for 1 cycle
Efficiency (AC/AC)* Up to 98%
Classification as per
IEC EN 62040-3

*according to IEC EN 62040-3

Connectivity and function extensions

Front panel Graphic display, mimic LED panel and keyboard, local EPO
Remote communication Included: serial RS232 and USB;
terminal block for battery breaker auxiliary contact.
Optional: input terminal block (remote emergency power off,
external maintenance bypass circuit breaker aux. cont., diesel mode aux. cont.); SNMP adapter (Ethernet),
Web interface (Ethernet), ModBus-TCP/IP (Ethernet), ModBus-RTU (RS485),
from ModBus-RTU to PROFIBUS DP adapter; SPDT contact relay board;
remote system monitoring panel; UPS managing and server shutdown software
Optional function extensions Isolation transformer; transformers/autotransformers for voltage adjustment;
external maintenance bypass; custom battery cabinets; wall-mounted battery fuse
switch box; battery thermal probe; parallel kit, load-sync for single UPS; other options on request


Protection degree IP 20
Colour RAL 7016
Installation layout 10 cm wall-gap, side by side installation allowed
Accessibility Front and top access, bottom cable entry


UPS operating temperature range 0 °C to +40 °C
UPS storage temperature range -10°C to +70 °C
Altitude (AMSL) <1000 m without power reduction, >1000 m with reduction of 0.5% per 100 m
Audible noise at 1 m (dBA) <52

Standards and certifications

Quality assurance, environment, health and safety ISO 9001, ISO 14001, ISO 45001
Safety IEC EN 62040-1
EMC IEC EN 62040-2
Environmental aspects IEC EN 62040-4
Test and performance IEC EN 62040-3
Protection degree IEC 60529
Marking CE