procurement of 03 nos. of 31.5 mva, 132/34.5kv power transformers , main items: , 31.5 mva, 132kv / 34.5kv, 50hz, ynd1, star (earthed neutral) / delta, core type, 3 phase, outdoor type, oil immersed, onan/ onaf cooled switchyard transformer complete with main tank, tank mounted cooler bank, on load tap changer (hv side) suitable for voltage variation of +/- 10% variation, cc cubicle, digital rtcc panel along with all fittings & accessories as per requirement of technical specification (except transformer oil, n2 fpes) , transformer oil for first filling plus 10% extra quantity. , complete set of equipment for fire prevention & extinguishing system by nitrogen (n2) injection method as per technical specification including supply of all control units & accessories, pipe, connectors, required control cables, ac / dc converters etc. all complete along with supply of spare n2 cylinder for above transformer. , condition controlled regenerative maintenance free silica gel breather for main conservator complete with all accessories , condition controlled regenerative maintenance free silica gel breather for oltc conservator complete with all accessories , type test charges as per spec.: , temperature rise test on one unit , impulse test on one unit , mandatory spares (for above transformer): , hv bushing as per spec. with metal parts & gaskets , lv bushing as per spec. with metal parts & gaskets , hv neutral bushing as per spec. with metal part & gaskets , buchholz relay (with alarm & trip contacts) for main tank , oil surge relay (with alarm / trip contacts) for oltc , magnetic oil level gauge (with alarm / trip contact) for main conservator , magnetic oil level gauge (with alarm / trip contact) for oltc conservator. , current transformer of hv wti. , current transformer of lv wti. , current transformer of hv-n , local oti complete with alarm, trip contacts & sensing device, etc. , local wti complete with alarm, trip contacts & sensing device, etc. , remote oti complete with alarm, trip contact & sensing device etc. , remote wti complete with alarm, trip contact & sensing device etc. , pressure relief device , remote tap position indicator , cooling fan with motor , terminal connectors (1no.t for each type of rating) , set of gaskets required for complete erection of one transformer including bushings, radiators, cooling pipes etc. , transformer oil sample collection bottle (steel bottle fitted with inlet & outlet valves, etc.) - 1000 ml capacity , hydraulic jacks suitable for above transformer (1 set consisting of 4 nos.) , unloading charge per unit at site (1 unit means complete set of transformer with all accessories, spares, tools & tackles etc.) , supervision charges for deputation of engineer / technician to supervise erection & commissioning work. (optional) – [n.b. general terms & conditions for supervision of erection & commissioning job shall be furnished] engineer / technician per day