Single Phase Online UPS Employing ACT with Power Factor Corrected Rectifier

High quality and availability of electrical power are now strategic requirements for all sectors of the economy. A breakdown can endanger the smooth running of a company and generate considerable financial costs. Failure of an electrical supply and electrical installation can be a serious human risk, for the operators as well as for the users. Blackouts, brownouts, voltage surges, voltage spikes, harmonics are common day-to-day power problems. Due to these problems we may not get clean power supply. But solutions do exists. Among these solutions, UPS is one of the most commonly used today. An Uninterruptible Power Supply, or UPS, is an electronic device that provides an alternative electric power supply to connected electronic equipment when the primary power source is not available. UPS design at communication center needs highest reliability and maximum availability. UPS's half cost is dependent on Battery. So it is more important to consider the battery life. Battery life mainly depends on three factors: Rate of discharge, charging current, temperature. We cannot control the rate of discharge. We can control only charging current and temperature factors. Using this concept how battery's life can be increased it is illustrated in this paper. With additional voltage and temperature sensor each battery block can be monitored individually.