UPS不间断电源，是一种含有储能装置、以逆变器为主要组成部分的恒压恒频的不间断电源。当市电 输入正常时，UPS将市电稳压后供应给负载使用，此时的UPS就是一台交流市电稳压器，同时它还向机内 电池充电；当市电中断(事故停电)时，UPS立即将机内电池的电能，通过逆变转换的方法向负载继续供应 220V交流电，使负载维持正常工作并保护负载软、硬件不受损坏，数据得以保存。UPS设备通常对电压过 大和电压太低都提供保护。

UPS uninterruptible power supply is a constant voltage and constant frequency uninterruptible power supply with energy storage device and inverter as the main component. When the mains input is normal, the UPS will stabilize the mains and supply it to the load. At this time, the UPS is an AC mains voltage stabilizer, and it also charges the battery in the machine; when the mains is interrupted (accidental power failure) When the time, the UPS immediately uses the power of the battery in the machine to continue supplying 220V AC power to the load through inverter conversion, so that the load can maintain normal operation and protect the load software and hardware from damage, and the data can be saved. UPS equipment usually provides