Fix Engineering
TF-I Series 10 kVA – 250 kVA – image 1

Online UPS

TF-I Series

3-phase input – 3-phase output10 kVA – 250 kVA

The TF-I Series (10–250 kVA) is a compact, high-performance three-phase online UPS (VFI-SS-111 class) with a 3-level IGBT topology and full nominal power (kW = kVA).

With efficiency of up to 96% (98% in ECO mode), input current THD of 3% or less and a high input power factor, it provides scalable runtime and power protection for industrial, IT, hospital, lighting and other critical applications.

  • Uninterrupted, stable power
  • High protection for critical loads
  • Continuous sine wave output

Product Features

  • 3-level IGBT topology
  • Full nominal power: kW = kVA
  • Online double conversion technology (VFI-SS-111 class)
  • IGBT PWM rectifier & inverter technology
  • Multi-processor digital control
  • High efficiency of up to 96%
  • Up to 98% efficiency with ECO mode
  • Low input current THD (≤3%)
  • High input power factor (≥0.99)
  • Low output voltage THD (≤2%)
  • Fast response time (≤2 ms)
  • Automatic soft start
  • Start from battery
  • Optional dual input
  • Advanced battery management
  • DC/DC charger / booster
  • Flexible number of connectable batteries
  • Wide input voltage operating range
  • Load-dependent input range that reduces battery use
  • Operating voltage down to -36%
  • Short-circuit, overload, lightning and voltage fluctuation protection
  • Parallel operation of up to 8 units
  • Intelligent redundancy management (N, N+1 and N+x)
  • 256 detailed real-time event records
  • Static and manual bypass system
  • Data analysis from the user panel
  • Wide range of communication options
  • Remote monitoring and management software
  • Excellent generator compatibility
  • Programmable dry contacts

Frequently Asked Questions

What should I consider when choosing a UPS?

The power of the load to be protected (VA/W), the required backup time, the input and output phase configuration, the installation environment and communication needs are assessed together. If you share your load details, we can help you choose the right model.

Which applications is the TF-I Series suitable for?

The TF-I Series (10–250 kVA) is a compact, high-performance three-phase online UPS (VFI-SS-111 class) with a 3-level IGBT topology and full nominal power (kW = kVA).

Is there technical documentation for the TF-I Series?

Yes. You can reach the product's technical specifications from the catalogue (PDF) on this page. The technical specifications table is also on the page.

How can I get a quote and technical support?

You can reach us through the form on our contact page or by phone. Let's define the right product and quote for your needs together.