Tips: Classification of UPSUPS is divided into three categories: standby, online and online interaction.The most commonly used type is standby UPS, which has the most basic and most important functions of UPS, such as automatic voltage stabilization, power-off protection. Although there is generally about 10ms conversion time, it is widely used in microcomputer, peripherals, POS machines and other fields because of its simple structure, low cost and high reliability.The on-line UPS has a complex structure, but its performance is perfect. Its remarkable characteristic is to continuously output the pure sine wave AC power with zero interruption. It can solve all the problems of peak, surge, frequency drift and other power supply problems. Due to its larger cost, it is usually used in critical equipment and network centers with strict electric requirement.Online interactive UPS, compared with the backup, has the function of filtering and strong anti electric interference ability. Its conversion time is less than 4ms and the inverter output is analog sine wave. So, it can be equipped with servers, routers and other network devices, or in a relatively harsh environment in power supply.