Off-line UPS (VFD)

UPS topology

“Voltage and frequency dependent” UPS in compliance with IEC 62040-3, also referred to as offline, protects against many problems in your network. Under normal conditions it conducts the input current to its outlet. When the power supply fails it switches over to a built in battery to compensate for any variations in the mains supply.


  • Small size
  • High efficiency
  • Low operating costs


  • transfer gap (some ms)
  • load is fed by unfiltered voltage (no correction by the inverter)
  • output voltage often not sinusoidal

  • Protect Home

    • 600 VA
    • Offline UPS (VFD)

    Especially for home applications, the Protect Home offers data line surge protection for telephones, faxes and modems. Connections are made directly to the UPS outlets. Protect Home proves itself in critical situations with its high availability due to a reliable overload and voltage protection.

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