Classification of UPS
It plays a vital role in maintaining the regularity of electric power. There are a variety of UPS used in power system. Some of them are discussed below—
In an online UPS, the batteries are always connected to the inverter, so that, no power transfer switches are necessary. In case of a power cut, there will be no momentary power breaks.
Standby or offline UPS
A system where normally AC input (utility power) is output, as it is to connected devices and when a power outage or abnormal voltage is detected, inverter starts feeding using power from the batteries. In the event of a power outage, a few milliseconds of momentary break occurs in the AC output