How to maintain UPS when cutting the loads when main power cut?

then Supply will continue through Phase wire (Output UPS) which is Connected from batteries and UPS to Appliances (Note that Neutral is already connected) . So the first one phase which is connected before UPS installation (i.e. Live Wire from Main board to UPS) would be inactive because power supply is not available from power house. In this case, you consume the store Electrical energy in the batteries.