B8031FXS: UPS 10 – 20 kVA 3/1

3/1 phase UPS 10-20 kVA

Single-phase output Uninterruptible Power Supplies for servers, network and telecom devices, safety and emergency systems, building automation, medical equipment.

  • Small size and high power density
  • Paralleled solutions up to 180 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 THDi<3% for maximum upstream sources compatibility
  • Accurate battery management providing ripple current minimization charge current/voltage control as per batteries manufacturers’ specifications and automatic/manual battery test for maximum battery expected life preservation
  • 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 parallelcontrol 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

B8031FXS technical data

Rating (kVA) 10 15 20
Nominal power (kW) 9 13.5 18
UPS Dimensions WxHxD (mm) 450x1200x670
UPS weight (kg) 100 110 110
UPS weight with internal battery (kg) Min.175 Min.260 Min.260
External battery module
dimensions WxHxD
Battery configuration Internal or external, 360÷372 cells, VRLA (other options)


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


Connection type Hardwired 2w
Nominal voltage 220/230/240 Vac 1-phase
Frequency 50/60 Hz
Voltage regulation ±1% static; dynamic: IEC EN 62040-3 Class 1
Power factor up to 0.9, lagging or leading without power derating
Overload capacity Inverter: 101÷125% for 10 min, 126÷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

Connectivity and function extensions

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


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

*according to IEC EN 62040-3

Other features


Operating temperature range 0 °C ÷ +40 °C
Storage temperature range -10 °C ÷ +70 °C
Altitude <1000 m
Audible noise at 1m (dBA) <62

Standards and certifications

Quality assurance, environment, health and safety ISO 9001:2008, ISO 14001:2004, GOST, BS OHSAS 18001:2007
Safety IEC EN 62040-1
EMC IEC EN 62040-2
Test and performance IEC EN 62040-3 (VFI-SS-111)
Protection degree IEC 60529
Marking CE