annual repair maintenance of vrs electrical and mechanical services installed at dduh and residential complex, hari nagar and dgd at vrs places, pwd (gnctd), new delhi (sh: repairs and replacement of defective parts of regulated power supply unit installed at various ahus in ddu hospital)- 1 repairing of existing elent make 50 kva regulated power supply unit by replacing the following accessories i/c replacement of the some minor components like selector switch, dpdt switch, panel lamp, carbon brush etc as required to complete the work (dismantle material is buyback to agency) (make : elent) 2 electronic circuit card (pcb) 3 servo motor 3 k.g motor 4 r.c. network for 3 kg motor 5 main transfer with copper winding suitable for 50 kva unit 6 50 kva28 amp dimmerstate 7 pcb holder 8 providing and fixing of 4 pole 63 amp onload changeover switch panel mounting type with ss enclosure with front operating handle in the existing cubicle panel including making connection interconnection with suitable aluminium strip etc. complete as required. (havells/l&t/legrand/ abb/ schneider)