A wide range of online double conversion ups system are available which are best guard for high end servers, workstations, cad/cam, risc, unix and for other systems which are sensitive for ac power irregularities and black out. It comprises of high switching frequency, which enables fast response to dynamic load resulting in very good transient response and exceptional performance with non linear loads. It provides indication if the main or inverter is on, there is a load on mains or ups, if the main fails, if the battery is low and trips. It also comprises of an all fault conditioned musical alarm. The online double conversion ups system is designed to support sophisticated equipments with high crest factor demand and provides unmatched performance .A system guaranteed to leave its customer fully satisfied.