When the on-line UPS power supply in normal

When the industrial ups power supply power supply in normal, power input voltage noise filter removes all the way through the grid frequency interference in order to obtain pure AC rectified and filtered into the rectifier and converts AC power to DC smoothing, then divide for two-way, all the way into the charger for charging the battery, the other way supply inverter, and inverter turn DC into AC 220V, 50Hz supply load.
When utility power outage occurs, AC input has been cut off, the rectifier is no longer working, then the battery discharge the energy delivered to the inverter, and then by the inverter converts DC into AC for load. Therefore, the load, despite the utility has ceased to exist, but this time the load is not interrupted due to electricity outage, you can still operate normally.