Substation & Switchyard Works Tenders

Earthing of S/s outdoor equipments: Laying of earth mat in the switchyard by laying of M.S. round of 32 mm dia in 1000 mm deep trenches with M.S. round 32mm dia, 3 Mtr. long earth electrodes as per RESPO/approved SOP drawing. The work includes welding of the M.S. round, connecting all steel structures in the switchyard with the earth mat by means of G.I. strips of size 50x6 mm as per item below (All required materials will be provided by contractor)(A) Excavation of earth/trenches 1000 mm deep from FGL level for laying MS earth mat (32 mm dia MS round rod).(B) Laying of 32 mm dia MS round earth rod horizontally in 1000 mm deep trenches at every 3 mtr lengthwise and every 3 mtr widgthwise throughout the switchyard.(C) At the level of 1000 mm deep trenches, at each cross joint of horizontally laid MS earth mat, bury 3 mtr long 32 mm dia MS round earth rod vertically in the ground and properly shape and weld each joint. The works includes cutting, shaping and binding, preparation of joints, proper making and welding of main earth mat bar joints and applying bitumen, bitumen impregnated on joints U clamp i.e. end joints, cross joints, lap joints etc).(D) To weld riser GI strip of 50x6 mm from main horizontal earth mat as per leg of each switchyard structures and to weld riser strip from two different locations (top & bottom) on the leg of the structures of each equipments like Transformer, Terminal gantry, Bus-bar gantry, Post insulator, 33 kV CT, 33 kV PT, Line & Bus isolator etc.

Labour for Collecting of existing gravels from switchyard premises and stacking the same within a lead of 75 meter within the Sub-Station area, Re-spreading the same gravels over Plain Cement Concrete in the switchyard premises & Screening, washing the gravels and cleaning the switchyard from plants, jungle, shrubs, mud, slurry etc including cost of tools and tackles

Earth Mat Work M.S.Round 32mm Dia approval make & Fabrication of earth mat. Excavation of earth of size (0.5x0.75)m in switchyard area as per drawing for laying of 32 mm dia G.I.. Round and 50x6mm size G.I.. strip and refilling & ramming of the same earth into the trenches after completion of work.