bids are invited for boqauto extension if any seller submits price in last 15 minutes, the rawill be auto extended by 15 minutes ( a maximum of500 times ) total quantity : 1-1 supply-1 centrifugal fan with motor - 51000 cmh ( supply air type centrifugal fan ( 1w+1s ) with motor, v-belt drive, pulley, casing alongwith fixing hardware and all accessories as per technical specification ) 2 supply-2 pre filter ( each filter of size 610x610 sqmm for gis ventilation system through centrifugal fans ) 3 supply-3 fine filter ( each filter of size 610x610 sqmm for gis ventilation system through centrifugal fans. ) 4 supply-4 gss duct sheet - 24 g - ventilation system ( ducting fabricated from gss having zinc coating as per is 277 complete with hangers, supports, joints / washers ) 5 supply-5 gss duct sheet - 22 g - ventilation system ( ducting fabricated from gss having zinc coating as per is 277 complete with hangers, supports, joints / washers. ) 6 supply-6 gss duct sheet - 20 g - ventilation system ( ducting fabricated from gss having zinc coating as per is 277 complete with hangers, supports, joints / washers. ) 7 supply-7 gss duct sheet - 18 g - ventilation system ( ducting fabricated from gss having zinc coating as per is 277 complete with hangers, supports, joints / washers. ) 8 supply-8 thermal insulation ( exposed duct insulation as per technical specification. ) 9 supply-9 supply air grill with vcd 10 supply-10 volume control damper 11 supply-11 motorized fire damper ( motorized fire damper excluding actuator with fire rating of 90 minutes ) 12 supply-12 motorized actuator for fire damper ( actuators for fire damper with control panel ) 13 supply-13 back draft damper 14 supply-14 louvers 15 supply-15 pressure relief damper ( 4 nos. of size 600x450 sqmm ) 16 supply-16 power distribution board 17 supply-17 structure steel duct support 18 supply-18 maintenance tools & tackles ( as per clause 8.2 of section-1 of technical specification. ) 19 supply-19 general spares as per ts ( as per clause 8.3 of section-1 of technical specification. ) 20 mandatory spare 1 pre- filter ( each filter of size 610x610 sqmm for gis ventilation system through centrifugal fans ) 21 mandatory spare 2 fine- filter ( each filter of size 610x610 sqmm for gis ventilation system through centrifugal fans. ) 22 mandatory spare 3 v-belts of each type for centrifugal fans 23 mandatory spare 4 mccb ( 2 nos. of each type used ) 24 mandatory spare 5 current transformer ( 3 nos. of each type used ) 25 mandatory spare 6 supporting insulator 6 no. of each type used ( if applicable ) 26 mandatory spare 7 indication lamps used including assemblies 27 mandatory spare 8 fuses 10 nos. of all type used ( if applicable ) 28 mandatory spare 9 control and instrumentation switches 29 mandatory spare 10 contactors ( 4 nos. of each type used ) 30 mandatory spare 11 indicating instruments 31 mandatory spare 12 under voltage relays 32 mandatory spare 13 over current and e / f relays 33 etc -1 centrifugal fan with motor - 34 etc -2 pre filter 35 etc -3 ventilation system- mains supply 36 etc -4 gss duct sheet - 24 g - 37 etc -5 gss duct sheet - 22 g - 38 etc -6 gss duct sheet - 20 g - 39 etc -7 gss duct sheet - 18 g - 40 etc -8 thermal insulation 41 etc -9 air grill with vcd 42 etc -10 volume control damper 43 etc -11 motorized fire damper ( motorized fire damper excluding actuator with fire rating of 90 minutes ) 44 etc -12 motorized actuator for fire damper 45 etc -13 back draft damper 46 etc -14 louvers 47 etc -15 pressure relief damper ( 4 nos. of size 600x450 sqmm ) 48 etc -16 power distribution board 49 etc -17 structure steel duct support 50 etc -18 cable laying alongwith accessories