Providing and fixing of lightening arresters (metal oxide gapless type, non-linear) at existing HT Overhead lines (DP Structure) of 6.6KV and 3.3KV near Installed lighting transformers at mines of Rajrappa project

Amount

Supplying and erection of three piece nonlinear resistor type lightning arrestor suitable for 3 wire, 6.6KV & 3.3KV overhead lines with a nominal discharge current rating of 5KA and complete with galvanised clamping arrangement, G.I. bolts, nuts, washers etc. as required (1 set= 3 Nos.)

Excavation of the cable trenches in hard rock not exceeding 1.5 metres in width and lift upto 1.5 metres, including getting out the excavated soil and disposal of excavated soil as directed within a lead of 50 meters. Dimension of Hole 0.75mX.75mX2.75mX6nos.

Supply and erection of approved make safe earthing electrode consisting pipe-inpipe technology as per IS 3043-1987 made of corrosion free G.I. pipes with constant ohmic value surrounded by highly conductive compound with high charge dissipation suitable for effective and maintenance free earthing in earth pit of minimum bore dia. 150mm size with 3 metre G.I. pipes having outer pipe dia of 50mm having 80-200 micron galvanizing, Inner pipe dia. of 25mm having 200-250 micron galvanizing, connection terminal dia. of 12mm in nominal soil with 50kg(two bag) back filling benonite compound UL listed and confirm to relevant Internationa/Indian standards around electrode upto ground level

Providing masonry enclosure with cover plate having locking arrangement and as required

Providing and fixing of G.I. tape 20mmX3mm thick in 25mm PVC covering and lating on surface for lightining conductor complete as required(for vertical run on mettalic pole)

Providing and fixing of G.I. clamp (with G.I. Nut bolts) suitable for fixing of lightning arrestors on the existing brackets

Total impact of GST for the purpose of CTC

RK CONSTRUCTION CHITARPUR