REPAIR/MAINT/REPLACEMENT OF VARIOUS TYPE OF EARTHINGS, LIGHTENING ARRESTERS AND ALLIED ITEMS AT AFS AMBALA UNDER GE (AF) AMBALA

Amount

Supply Installation Testing and Commissioning in replacement a set of maintenance free tripod earthing system consisting of 3 No. of Copper Bonded Earth Rod of 10 feet length, 17.2 mm dia made of high tensile low carbon steel circular rods, molecularly bonded with 99.9% electrolytic grade copper on outer surface (minimum copper bonding thickness-250 microns) with exothermically jointed copper bus bar of 150x50x6mm for long lasting and connection . Each copper bonded rod and the exothermically jointed busbar both should be CPRI tested on at least 25KA Fault current to ensuring the high current carrying capacity of the system and earth rod should be certified by Underwriter laboratories confirming to comply with UL467 international standard for grounding and bonding equipment. Each rod should be used with minimum 50kg earth enhancing compound that should be ROHS tested and have passed , Resisitivity of the earth enhancing compond should be less than 0.05 ohm meter - an international standard for Earth Enhancement Compound by NABL accredit Lab. Note : The rate for interconnection of tripod earth with Copper strip of size 20x3 mm and poly carbonate earth pit cover -03 Nos shall deemed to be included in the quoted rates. The Earth result should be less than 1 ohm and the result will be checkedin presence of user rep & MES Rep.

M&L for earthing in replacement complete with Copper earth plate electrode 600 x 600 x 3.15 mm thick buried directly in ground (earth pit not less than 2.25 mtr deep below normal ground level) with top edge of the plate not less than 1.5 mtr below normal ground level,the earth electrode surrounded by adequate quantity of charcoal dust and salt to a packed thickness of 15cm on all side and including connected toand including Copper strip as earth lead 20x3mm mm size upto 7.5 mtrs long by means of nuts and bolts, check nuts and washers of brass and connected to earhing test point and earth dolly all as shown in electrical plate No 3 of MES SSR part I and testing on completion including necessary excavation and earth work in any type of soil,PCC(1:3:6)type C1 chamber,pre-cast RCC slab 50mm thick in cement concrete (1:2:4),type B1,reinforced with welded steel wire fabric or XPM,(weight not less than 4 Kg per Sqm) with cast iron frame,funnel with watering pipe 20mm dia medium grade,wire mesh and lugs,GI protection pipe,15mm dia,light grade,7.5 mtr long for protection of earth lead upto test point etc complete all as specified and directed.

M&L for earthing in replacement complete with galvanized steel earth plate electrode 600 x 600 x 6 mm thick buried directly in ground (earth pit not less than 2.25 mtr deep below normal ground level) with top edge of the plate not less than 1.5 mtr below normal ground level,the earth electrode surrounded by adequate quantity of charcoal dust and salt to a packed thickness of 15cm on all side and including connected toand including galvanized earth lead strip 32 x 6 mm size upto 7.5 mtrs long by means of nuts and bolts, check nuts and washers of GI and connected to earhing test point and earth dolly all as shown in electrical plate No 3 of MES SSR part I and testing on completion including necessary excavation and earth work in any type of soil,PCC(1:3:6)type C1 chamber,pre-cast RCC slab 50mm thick in cement concrete (1:2:4),type B1,reinforced with welded steel wire fabric or XPM,(weight not less than 4 Kg per Sqm) with funnel with watering pipe 20mm dia medium grade,wire mesh and lugs,GI protection pipe,40mm dia,light grade,7.5 mtr long for protection of earth lead upto test point etc alongwith old unserviceable earthing all as specified and as directed.

M&L for earthing in replacement complete with galvanized steel earth plate electrode 600x600x6.0 mm thick buried directly in ground (earth pit not less than 2.25 mtr deep below normal ground level) with top edge of the plate not less than 1.5 mtr below normal ground level,the earth electrode surrounded by adequate quantity of charcoal dust and salt to a packed thickness of 15cm on all side and including connected toand including galvanized earth lead wire 4.0 mm dia upto 7.5 mtrs long by means of nuts and bolts, check nuts and washers of GI and connected to earhing test point and earth dolly all as shown in electrical plate No 3 of MES SSR part I and testing on completion including necessary excavation and earth work in any type of soil,PCC(1:3:6) type C1 chamber,pre-cast RCC slab 50mm thic in cement concrete (1:2:4),type B1,reinforced with welded steel wire fabric or XPM,(weight not less than 4 Kg per Sqm) with funnel with watering pipe 20mm dia medium grade,wire mesh and lugs,GI protection pipe,15mm dia,light grade,7.5 mtr long for protection of earth lead upto test point etc complete. Note for Item ser No. 1 to 4:- (a) The quoted rates are including taking down of old unsv earthing any type and size. (b) The value of earth pit should be checked in presence of MES rep. (c) If the desired value of earth resistance is not found then complete earthing will be re-done by contractor without any extra charges to the dept.

S&F Test point in replacement terminal block made of gun metal pr phosphorus bronze, size 75x75x25mm drilled and screwed with sheet metal enclosure of size 100x100x100 mm made out of steel sheet of thickness not less than 1.6mm incl 3 Nos 8mm dia 25mm long hexagonal head screw, complete all as specified and directed

M&L in replacement for Air termination, single pointed aluminium rod 12 mm dia and 300 mm long incl fixing base plate with insulator complete fixing on the top roof of the hanger complete all as specified and directed.

S&F rectangular type earth pit cover made out of heavy duty pre-cast RCC slab 50mm thic in cement concrete (1:2:4),type B1,reinforced with welded steel wire fabric or XPM,(weight not less than 4 Kg per Sqm) of suitable size incl all necessary masonary work for fixing of earth pit cover incl replacement of wire mesh( jali) ,funnel including painting of plain PCC earthing pits surface by preparing new untreated surface,applying priming paints coats y two coats followed by two coats synthetic enamelled paint all as directed by Engineer-In-Charge.

M&L for provn of identifier legend of GI plate of size 300x200x1.6mm mounted on 25mm dia GI pipe of 0.9 mtr length incl cutting to exact shape/size as per Air HQ office letter No. Air HQ/72106/17/DES (crood) dt 31 Dec 2015. Welding,marking necessary painting and writing the date, type of earth pit and resistance value etc complete all as directed by Engr-in-charge.

S&F copper strip in replacement of size 20x3 mm complete with saddles and base insulators (made out of porcelene/PVC) and fixing screws on roof and down side conductors complete all as specified and directed

S&F Galvanised iron strip in replacement of size 32x6mm on FRP insulator fixed on wall/MS sheet or floors incl connecting to lightening arrester/earthing/test point strip should be brazed/welded at each joint complete all as specified and directed

M&L for Aluminium strip in replacement of size 25x3mm on FRP insulator fixed on wall/MS sheet or floors incl connecting to lightening arrester/earthing/test point strip should be brazed/welded at each joint complete all as specified and directed

S&F PVC/Porcelain insulator on wall/MS sheet including removing of existing earth strip of any type and refixing the same on insulators, complete all as specified and directed

M&L for PVC conduit in replacement of size 32 mm Heavy duty complete for protection of strip complete all as specified and directed

M&L for Preventive maintenance of Normal GI/copper earth pit by checking earth resistance value of earth and maintain the record before and after treatment of earth by pouring of Mixture of chemicals like sodium carbonate , magnesium sulphate , common salt, charcoal etc for improving the earth resistance value it also includes any excavation required at site complete all as specified and directed

M&L for Preventive maintenance of Chemical earth pit by checking earth resistance value of earth and maintain the record before and after treatment of earth by pouring of chemical compound used in chemical earthing etc for improving the earth resistance value less than 1 ohm it also includes any excavation required at site all as directed.

M&L for brazing/welding/soldering of copper/Aluminium/Galvanised iron strips at joint complete all as specifed and directed.

Cutting vegetation and surface dressing not exceeding 15 cm deep including removing the materials to a distance not-exceeding 60 mtr complete. Note :- Item shall be executed twice in each installation and quantity is given for two operation. However unit rate to be quoted by the tendered for single operation only

Supply & spreading 40 mm graded crushed stone aggregate in layer not exceeding 150mm thick each layer around the transformer at sub station complete all as specified and directed.

Supply & spreading/filling 20mm graded stone aggrgate in layer not exceeding 150mm each layer complete all as specified and directed.

M&L for PCC 1:3:6 type C-2 using 40mm graded stone aggregate as in bocks to hold GI extension pipe for Air termination rod complete including necessary use and waste of form work required, complete all all as specified and directed

Supply and filling Salt (Sodium chloride) for recharging of Earthing pits complete all as directed by Engr-in-Charge.

Supply and lay medium class grade 25 mm dia GI pipes in replacement with all fittings laid in trenches/wall complete all as directed by Engr-in-Charge.

Supply and lay medium class grade 20 mm dia GI pipes in replacement with all fittings laid in trenches/wall complete all as directed by Engr-in-Charge.

Supply and lay medium class grade 15 mm dia GI pipes in replacement with all fittings laid in trenches/wall complete all as directed by Engr-in-Charge.

S&F gun metal gate valve in replacement of 25 mm dia with iron wheel,screwed at both ends for 25 mm GI Pipe in trenches complete all as directed by Engr-in-Charge.

S&F gun metal gate valve in replacement of 20 mm dia with iron wheel,screwed at both ends for 20 mm GI Pipe in trenches complete all as directed by Engr-in-Charge.

S&F gun metal gate valve in replacement of 15 mm dia with iron wheel,screwed at both ends for 20 mm GI Pipe in trenches complete all as directed by Engr-in-Charge.

M&L for cutting existing GI/DI/CI pipe line of dia upto 80 mm bore and making connection for 25/20 mm bore GI pipe including fittings complete as per site requirement complete all as directed at site.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.50 m deep for laying of water pipe lines/taking out pipe lines and getting out in soft/loose of soil including forming bottom surface to required level and slope complete all as specified and directed.

Returning, filling IN including spreading, leveling, watering and well ramming in layers not exceeding 2.5 cm soil complete all as specified and directed.

Removal of surplus soil to a distance not exceeding 50 mtr and depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified and directed.

S&F in replacement Plug type bib taps,cast iron, screwed for iron pipe and fixed suitable for 15mm bore dia pipe complete all as directed by Engr-in-Charge.

Esha Engineers (BID ID -3414016)

Raman Electric Trading Co (BID ID -3416575)

kapil enterprises (BID ID -3415940)

R N Enterprises (BID ID -3411823)