UPS

An uninterruptible power supply (UPS) is a type of power supply used to power and protect an electrical load that is sensitive to fluctuations in or the absence of electrical power. Uninterruptible power supplies are widely used to provide power to electronic components in the event that the alternating current (AC) utility input voltage fails. Uninterruptible power supply (UPS) systems are power conversion systems that are commonly used to provide conditioned, reliable power for devices and systems such as computer networks, telecommunications networks, medical equipment and the like. Uninterruptible power supply are used in a variety of different environments in which an interruption of power due to the variations or loss of the primary power source is unacceptable. Since reliability is a chief attribute required of such systems, constant maintenance is required. Electronic equipment which is state dependent and which derives electrical power from line voltage provided by utility companies over a distribution grid is fundamentally vulnerable to system damage and data loss through the loss of continuity of power. A large number of electronic devices, such as cordless telephones, computers, baby monitors, radios, and answering machines, which are found in the home and office do not possess a backup power supply. As a result, when power service is interrupted, these electronic devices are inoperable. Typically, computer systems require a constant power supply. Interruptions in the power supply can erase memory and injure the software and hardware of the computer. Other situations where uninterrupted power supplies are considered important include: automatic banking services, automatic industrial processes, communication and signaling centers for maritime and aerial transportation, radio and television stations, and various emergency and security services. UPS systems can provide temporary power to the devices and systems so that the devices and systems can continue to operate despite the loss of the primary power source and thereby can reduce the likelihood that valuable data may be lost.