UPS stands for Uninterruptible Power Supply. An Uninterruptible Power Supply (UPS) isan electrical device used to provide emergency electrical power to different electrical loads inthe case of a main power supply failure. A UPS or uninterruptible power supply uses batteriesand. Following are the main components of a UPS system − 1. Battery− The battery works as the energy storage unit in the UPS system. It. The uninterrupted power supply (UPS) systems are broadly classified into the following threetypes − 1. Off-Line UPS 2. On-Line UPS 3. Line. When there is any failure in the main power supply from the utility, the UPS suppliesemergency power to the load for a short duration of time. This is the primary function of aUPS. These days, UPS systems are very common in almost all electrical and electronic systems.Following are some of the important applications of different types of UPS.