replacement of ups of pbb at surat airport; supply, installation, testing and commissioning of true online ups with minimum 20 kva capacity, 3 phase in and 3 phase out with double conversion pwm igbt technology, in built isolation transformer suitable for passenger boarding bridge operation, unbalanced load at output at full load condition as per technical specifications/data sheet enclosed. the ups shall have standard features like in built automatic 100% rated static by pass, maintenance by pass, active input power factor correction, phase sequence corrector, pure sine wave output, input-ouput power isolation through mccb, compatibility with generator supply, cold start capability, emi/rfi noise filter, advanced communication-rs485 port, user friendly lcd display, suitable to operate at 415v, 50hz, 3 phase ac supply and delivering3phase output from ups and necessary safety protection. the job also includes supply and connecting the suitable required number of 12v, smf batteries forming minimum 18000vah battery bank,to give a backup time of minimum 30 minutes at the rated full load along with battery management feature integrated with ups,battery rack, battery breaker, connectors, wiring, cabling for battery bank, ups & battery, lt panel to ups input,ups output to load panel with insulated copper conductor of required size for connection between batteries & ups, aluminium cable for ups to panel including laying, termination of cables as per site condition etc. complete as required.note:-dismantling and shifting of existing 20kva ups is included in the scope and quote of item no.1