User:Girikumar25

Uninterrupted Power Supply (UPS)is a device which supplies the stored electrical power to the load in case of raw power cut-off or blackout. One type of UPS uses batteries to store power and an inverter to supply AC power from the batteries when main power is not available. When main power is restored, a rectifier is used to supply DC power to recharge the batteries.

Direct current (DC): Alternating current (AC, also ac)