Line-interactive UPS (VI – Voltage Independent)
This topology operates in a similar way to an Offline UPS, but with the addition of a built in voltage stabiliser. The voltage stabiliser ensures that the output voltage from the UPS stays within a predetermined window, regardless of fluctuations in voltage from the incoming mains supply. This offers a greater level of protection fo sensitive equipment that have pre-set voltage parameters. In the event of a power failure, or variation of the mains supply
outside of the pre-set window, power is transferred to the inverter by the static switch. Changeover time for this topology is approximately 2-8ms.
Advantages
- Offers voltage stabilisation
- Lower cost than online double conversion UPS
- Quicker transfer time compared to offline UPS
- Extended runtime options
- Communication Cards available
- High Efficiency
- Protects against more power anomalies than offline UP
Disadvantages
- Still involves a changeover gap when transferring to inverter
- Only available up to 5kVA
- Protects against less power anomalies than online UP
Providing complete UPS solutions for over 10 years.
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