What is UPS? -Working & Types of UPS Explained This article explains the UPS, its application, historical background, types and working principle of UPS with their schematic diagram. Definition: A UPS is a device which provides an uninterruptable power supply so as to maintain the continuity of supply in case of power outage. UPS stands for Uninterruptable Power Supply. Requirement of UPS: There are several applications where even a temporary power failure can cause a great deal of public inconvenience leading to large economic losses. Examples of such applications are major computer installations, process control in chemical plant, safety monitors, general communication systems, hospital intensive care units (ICUs) etc. For such critical loads, it is of paramount importance to provide an uninterruptable power supply. Here, comes the importance of UPS. Application of UPS system caters to such critical loads. Background: UPS system used earlier were base...