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