Providing Lightning arrester and associated work at various existing proposed 4G BTS Sites under Phase IX.2 Project in Business Area, Dehradun

Amount

Providing and fixing of lightening arrestor of 1500 long ,25 mm dia hollow Copper tube having wall thickness not less than 1.60mm inclusive of 5 spikes of 150mm length i/c 150mm length tinning the bottom portion of spike i/c fixing with Teflon sheet/ earthing insulator on Top of tower with necessary brass nut/bolts as per specification and drawing attached for all heights of towers GBT and RTT as per the directions of Engineer in Charge. complete etc as reqd

Supplying, Installation, Testing ,Commissioning of Maintenance free Chemical earth station as per latest RDSO specifications consisting of :- a) Steel electrode ,High Tensile ,low carbon molecularly bonded with copper on outer surface as Per UL requirement of 3 Meter long, 17 mm dia with copper bonded thickness of minimum 250 microns and a copper coated low carbon steel strip of 300mmx25mmx6mm with suitable hole shall be exothermically welded to main Earth electrode for taking the connection to main earth bus - 1No. b) Earth Enhance material ,Maintenance free, Environmental friendly, Mineral compounds, Semi soluble, non corrosive, conductivity improving material confirming to IS 62561 Part 7 of RDSO approved) =30-35 Kg c) Poly plastic, Heavy Duty, weather-proof, environmental free earth pit chamber with cover size about top dia 250mm bottom 330mm and height 260mm. Heavy duty of 7 TON load capacity, the base unit should have knockouts for interconnection of strips. Note -a)Measurement of earth resistance will be done after 24 hour as per RDSO specification .b) Chemical Earthing work should be strictly carried out as per RDSO Specification attached) ,c )The above work is all inclusive i/c transportation (in plain and hill area), T&P and testing at site complete as required , d) The Sites of earthing will be located in Plane as well as hill area of Uttarakhand state so Quote the Rate accordingly .

In Normal Soil

In hard rock Soil

S/F of 25mmx5 mm thick GI strip for inter linked of earth electrodes and Main electrode to main earth bus on surface /recess or buried below 500mm below ground level i/c connection with SS nut bolt complete etc as reqd

Repairing of existing Lightning arrestor system i/c testing of Continuity ,earth value , Power cable ,making arrangement for earth testing meter, tools and necessary skilled technician to complete the job i/c watering and repairing of earth Pit if reqd (But without supply of material like earth strip ,LA ).The Material if required shall be measured on actual basis in above item ). This item will be paid if only Repairing of LA is done .) (Note- This item is to be executed on need basis.)