穩變電氣 UPS不間斷電源，是一種含有儲能裝置、以逆變器為主要組成部分的恒壓恒頻的不間斷電源。當市電 輸入正常時，UPS將市電穩壓后供應給負載使用，此時的UPS就是一臺交流市電穩壓器，同時它還向機內 電池充電；當市電中斷(事故停電)時，UPS立即將機內電池的電能，通過逆變轉換的方法向負載繼續供應 220V交流電，使負載維持正常工作并保護負載軟、硬件不受損壞，數據得以保存。UPS設備通常對電壓過 大和電壓太低都提供保護。
Wenbian 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 protection against overvoltage and unden/oltage.