Line Interactive UPS

The main advantage of this design is that the inverter/converter unit is always connected to the output, powering the equipment. This design allows for faster response to a power failure than a standby UPS. The inverter/ converter is also normally fitted with circuitry to filter out noise and spikes, and to regulate the power during brownouts and curtailing output during surges.

The Line-Interactive UPS is an improved design that is commonly used in units for home and business use. It is superior to the standby UPS, but it still has a transfer time, and thus does not provide protection as good as the online UPS.

The Line Interactive UPS uses a totally different design than any type of standby UPS. In this type of unit, the separate battery charger, inverter and source selection switch have all been replaced by a combination inverter/ converter, which both charges the battery and converts its energy to AC for the output as required