Uninterrupted Power Supply System remains on battery, whether mains ac is present or not when mains AC is present and provides power to DC supply of inverter section as well as charges the battery simultaneously. The System has good dynamic response for step load change, smooth and silent operation and is easy to install, use and maintain. The System has constant current and constant voltage battery charger, isolation form input to output and has ultimate protection against all power line disturbances. The System has automatic float cum boost charger, battery input from 48 to 360 VDC, output voltage 230v+ or- 1%, output frequency of 50 Hz+ or- .25%, 90% inverter efficiency. The System has sine wave form, overload capacity of 120% for 1 minute, 150% for 10 second, switching frequency of 12.5 KHZ, circuit method of double conversion. The System has ambient temperature from 0 to 50 ° C, audible noiser from 45 to 55 db at 1.5 meters, forced air type cooling. The Uninterrupted Power Supply System has rated output capacity from 0.5 KVA to 100 KVA, input voltage range from 170 to 470 VAC, input frequency from 47 to 53 Hz.
