MAINTENANCE, REPAIR AND REPLACEMENT OF DEFECTIVE ITEMS OF EARTHING, LIGHTENING PROTECTION SYSTEM AND MISC ITEMS AT 2 WING AF STN PUNE

Amount

Material and labour for Checking/ Testing of resistance value of any type of earth pits by disconnecting earth continuity conductor from test terminal block/panel/equipment at various location of AF Station Pune and reconnecting the earth continuity conductor after testing.Temporary earthing connection to be provided while testing.Earth tester will be provided by contractor. Earth tester must be calibrated. Contractor has to prepare sketch of earthings indicating the locations in surrounding of bldgs and give the earthing No. , type of earthings i.e earthing for AF Equipments (EQ1 , EQ2 etc), lightning protection earthing (LA1, LA2 etc) & Power supply earthing (PS1, PS2 etc).Earth test results shall be recorded in reference to sketch. Earth test to be signed by Rep of contractor, Rep of MES and Rep of AF. Test reports to be submitted in triplicate complete all as specified and directed.

M&L for maintenance of GI Plate/copper plate earthing to improve the earth resistance as following:- (a) Remove the earth chamber carefully for reuse. (b) Excavation in any type of soil and rock 0.5 cum (approx 0.75m x 0.75m x 0.9m depth ) (c) On First day recharge the earth pit with common salt, Magnesium sulphate,back fill compound mixed with water.(Approx salt- 10 kg, Mg sulphate- 10 kg, charcoal - 10 kg) (d) On the next day recharge the earth pit with water 500 ltrs. (e) Excavated material to be removed from the site and deposit at the distance not exceeding 50m distance and levelled. (f) Refill the pit with black cotton soil (M&L for black cotton soil must be included in the quoted rate) (g) Refit the earth chamber in place. (h) Material and labour for Testing of earth must be included in the quoted rate. Note:- (i) Common salt, Mg sulphate, charcoal will be measured and paid separately. (ii) If existing chamber is already damaged then new chamber will be provided, measured & paid separately. .

M&L for maintenance of GI plate earthing to improve the earth resistance as following complete all as specified and directed.:- (a) Remove the earth chamber carefully for reuse. (b) Excavation in any type of soil and rock. (c) Taking out GI Earth plate , watering pipe , funnel , earth continuty GI strip, cleaning of GI earth plate and GI strip with wire brush and polish paper , cleaning of GI pipe and funnel and reinstall the the same (d) GI strip shall be fitted with GI plate by GI nutbolts - 3 nos and in addition welding to be carried out , weld length between GI plate and GI strip not less than 30 CM on both side of strip (e) On First day recharge the earth pit with charcoal ,common salt and magnesium sulphate mixed with water and black cotton soil (Approx charcoal - 25 KG, salt- 25 kg, Magnesium sulphate - 25 kg , black cotton soil) (f) On the next day recharge the earth pit with water 500 ltrs . (g) Excavated material to be removed from the site and deposit at the distance not exceeding 50m distance and levelled (f) Refill the pit with black cotton soil (M&L for black cotton soil must be included in the quoted rate) (g) Refit the earth chamber in place. (h) Material and labour for Testing of earth must be included in the quoted rate. Note:- (i) Common salt, Mg sulphate, charcoal will be measured and paid separately. (ii) If existing chamber is already damaged then new chamber will be provided, measured & paid separately.

M&L for maintenance of copper plate earthing to improve the earth resistance as following complete all as specified and directed.:- (a) Remove the earth chamber carefully for reuse. (b) Excavation in any type of soil and rock. (c) Taking out Copper Earth plate , watering pipe , funnel , earth continuty copper strip, cleaning of copper earth plate and Copper strip with wire brush and polish paper , cleaning of GI pipe and funnel and reinstall the the same. (d) Copper strip shall be fitted with copper plate by brass nutbolts - 3 nos and in addition brazing to be carried out , brazing length between copper plate and copper strip not less than 30 CM on both side of strip (e) On First day recharge the earth pit with charcoal ,common salt, magnesium sulphate mixed with water and black cotton soil (Approx charcoal - 25 KG, salt- 25 kg, Magnisium sulphate - 25 kg , black cotton soil.) (f) On the next day recharge the earth pit with water 500 ltrs . (g) Excavated material to be removed from the site and deposited at the distance not exceeding 50m distance and levelled . (f) Refill the pit with black cotton soil (M&L for black cotton soil must be included in the quoted rate) (g) Refit the earth chamber in place. (h) Material and labour for Testing of earth must be included in the quoted rate. Note:- (i) Common salt, Mg sulphate, charcoal will be measured and paid separately. (ii) If existing chamber is already damaged then new chamber will be provided, measured & paid separately.

M&L for fixing earth indicators made out of 3 mm thick MS sheet of size 200 mm x 300 mm duly fixed in MS angle iron 25 mm x 25mm x 3mm of 600 mm long fixed to ground by means and including necessary cement concrete foundation and painting with one coat of synthetic enamel paint over a coat of red oxide primer complete for writing earth reading and connected plant/ panel etc. and excavation and earth work complete all as specified and directed.

S&F in repair of test point made out of gun metal or phosphorous bronze of size 75x50x5mm duly mounted on epoxy insulator 02 Nos.Drilling of upper & lower portion of test point for incoming & outgoing connections with brass nut bolt to be fitted in and including terminal blockmade out of M.S sheet 2mm thick as per the sample duly painted with two coat of enamel paint over a coat of red oxide primer complete all as specified and directed.

M&L for supply, installation, testing and commissioning of pure copper pipe electrode earthing maintenance free earthing based on 6 mtr long copper pipe 80 mm dia(ID) with wall thickness of 3 mm, copper strip 32x 6 mm ( strip in pipe type electrode )and copper pipe electrode shall be filled with MFC for improvement of conductivity of electrode, 120 KGS approx of BFC shall be filled around the copper pipe elecrode . Rate included for testing,commisioning including checking of earth continuity and earth result complete all as specified and directed. Vendors are bound to get earthing result less than or upto1 Ohm with or without grid of earthings(Maximum number of new earthings in grid are restricted to 3 nos) Copper strip required for interconnection of earth pits in grid must be laid 2 ft below the ground level and the same must be treated with chemical (BFC) if required to achieve resistance value. Any additional work and material required to achieve the required result is included in the cost..Any additional work and material required to achieve the required result is included in the cost. Rate is included for boring of earthing in any type of soil/rock upto 200 mm bore.Continuity of good earth resistance shall maintained upto 1 year and testing will be carried out monthly by MES authority.Copper strip must be connected with copper pipe electrode and at other joints through nut bolt in addition to brazing complete all as specified and directed. (i) Earth strip from top connector of electrode to test point and further connection to LT panel/AF equipments/ for grid of earthing shall be measured and paid separately. (ii) Maximum no. of New earthings to be connected in grid are restricted to 03 Nos.

Material and labour for supply, installation, testing and commissioning of GI pipe electrode earthing maintenance free earthing based on 6 mtr long GI pipe 80 mm dia(ID) medium grade, GI strip 32x6 mm (Strip in pipe type electrode) and GI pipe electrode shall be filled with MFC for improvement of conductivity of electrode, 120 KGS approx of BFC shall be filled around the GI pipe electrode. Rate included for testing,commisioning including checking of earth continuity and earth result complete all as specified and directed.Vendors are bound to get earthing result less than or upto 5 Ohm with or without grid of earthings(Maximum number of new earthings in grid are restricted to 3 nos) GI strip required for interconnection of earth pits in grid must be laid 2 ft below the ground level and the same must be treated with chemical (BFC) if required to achieve resistance value. Any additional work and material required to achieve the required result is included in the cost. Rate is included for boring of earthing in any type of soil/rock upto 200 mm bore. Continuity of good earth resistance shall maintained upto 1 year and testing will be carried out monthly by MES authority.GI strip must be connected with GI pipe electrode and other joints through nut bolt in addition to welding complete all as specified and directed. Note:- (i) Earth strip from top connector of electrode to test point and further connection to LT panel/AF equipments/ for grid of earthing shall be measured and paid separately. (ii) Maximum no. of New earthings to be connected in grid are restricted to 03 Nos.

M & L for providing earthing complete with Copper earth plate electrode 600 mm x 600 mm x 3.15 mm thick buried directly in ground earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 Mtr below normal ground level connected to copper earth strip 20 x 3 mm by means of bolts, nuts, checknuts & washers of copper and connecting to test point , providing charcoal and common salt ,all as shown in electrical plate No. 3 of SSR Part I of 2009 & as specified or indicated and testing on completion including excavation/earth work in any type of strata PCC ( 1:3:6 ) type C1 earthing chamber, pre cast slab 50 mm thick in cement concrete ( 1: 2 : 4 ) type B1 (reinforced with welded steel wire fabric (XPM) weight not less than 4 Kg / Sqm), funnel with wire mesh, watering pipe of 20 mm bore medium grade and lugs, including copper earth strip 20 x 3 mm , 7.5 meter long, etc complete all as specified and directed. Note- (i) Vendors are bound to get earthing result less than or upto1 Ohm with or without the grid of earthing.(Maximum number of new earthings in grid are restricted to 3 nos) Any additional work and material required to achieve the required result is included in the cost. (ii) Excavated material to be removed from the site and deposit at the distance not exceeding 50m distance and levelled. (iii) Refill the pit with black cotton soil. (M&L for black cotton soil must be included in the quoted rate)

M&L for providing earthing complete with galvanised iron earth plate electrode 600 mm x 600 mm x 6mm as earthing lead buried directly in ground vertically to a depth not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 Mtr below normal ground level connected to and including galvanised iron strip 32x6 mm as earthing lead by means of bolts, nuts, check nuts & washers etc made of GI and connected to earthing test point, providing charcoal and common salt all as shown in electrical plate No. 3 of SSR Part I of 2009 & as specified or indicated and testing on completion including exaction/earth work in any type of strata PCC (1:3:6) type C1 earthing chamber, pre cast slab 50 mm thick in cement concrete (1:2:4) type B1 (reinforced with welded steel wire fabric (XPM) weight not less than 4 Kg/sqm), funnel with wire mesh, watering pipe of 20 mm bore medium grade and lugs, including galvanised iron strip 32x6 mm ,7.5 meter long, etc complete all as specified and directed. Note:- (i) Vendors are bound to get earthing result less than or upto 5 Ohm for Lightning arrester earthings and less than or upto 2 Ohm for signal and power supply earthing with or without grid of earthing(Maximum number of new earthings in grid are restricted to 3 nos) .Any additional work and material required to achive the required result is included in the cost quoted by the tenderer. (ii) Excavated material to be removed from the site and deposit at the distance not exceeding 50m distance and levelled. (iii) Refill the pit with black cotton soil. (M&L for black cotton soil must be included in the quoted rate)

S & F GI earth continuity conductor or main earthing lead of size 32x6 mm fixed to wall on batten or recess or chases or buried in ground or drawn in conduit / pipe or fixed to poles or any other indicated situation for earthing etc. as required complete all as specified and directed.

S & F copper earth continuity conductor or main earthing lead of size 20x3 mm fixed to wall on batten or recess or chases or buried in ground or drawn in conduit / pipe or fixed to poles or any other indicated situation for earthing etc. as required complete all as specified and directed.

S & F GI wire 4mm dia fixed to wall on batten or recess or chases or buried in ground or drawn in conduit / pipe or fixed to poles or any other indicated situation for earthing etc. as required complete all as specified and directed.

Taking down carefully from roof / wall of the building loose / hanging / deshaped / GI strip/ aluminium strip / copper strips of any size & type including unserviceable insulators etc complete all as specified and directed.

S&F GI Sheet funnel with wire mesh complete all as specified and directed.

Taking down termination rod complete all as specified and directed.

Supply & fix aluminium strips 25x3 mm on porceline insulator 'T' type not more than 50 cm apart complete all as specified and directed. Note: M&L Porcelain insulators with nuts bolts and screws will measured and paid separately

Refixing serviceable aluminium strips of any size and fixing on porecelin insulators 'T' type placed not more than 50 cm apart & fixed with srews & nut bolts complete all as specified and directed. Note : M&L Porcelain insulators with nuts bolts and screws will measured and paid separately

Supply and fix air termination single pointed aluminium 12 mm dia & 300 mm long including nuts & bolts for fixing air termination rod to pole/ pipe duly insulated by providing appropriate insulator all as required at site complete all as specified and directed.

Refixing air termination rod complete all as specified and directed.

Refixing of GI supporting pipe 40/50mm (for termination rod) complete all as specified and directed.

M&L for PCC 1:4:8 type D2 using 40 mm graded stone aggregate as mass concrete for foundation of GI tubing /Air termination rod complete all as specified and directed.

S&F GI socket reducer 40x25 mm and aluminium gutka externally threaded suitable for 25 mm GI socket and internally threaded suitable for fixing epoxy insulator for fixing terminal rod complete all as specified and directed.(As per sample). Note: Material and labour for epoxy insulator is included in the rate quoted by the tenderer.

S&F porcelain insulators with nut bolts / screws for fixing of copper / aluminium strips / GI strips on walls etc complete all as specified and directed.

Refixing of porcelain insulators with nut bolts / screws for fixing of copper / aluminium strips / GI strips on walls etc complete all as specified and directed.

S&F GI pipe medium grade 40 mm dia embeded in concrete complete all as specified and directed.(mounting arrangment for air termination) Note: M&L for PCC work will be measured and paid separately.

S&F in repair of GI tubing 15 mm bore 'medium grade' including all necessaory fittings i.e. socket, elbow etc.laid on floor or fixed to wall complete all as specified and directed.

S&F in repair of GI tubing 15 mm bore 'medium grade' including all necessaory fittings i.e. socket, elbow etc.laid in trenches complete all as specified and directed.

S&F Stop valve of 15mm dia complete all as specified and directed.

Supply and fix Bib tap 15 mm bore size of cast copper alloy with crutch or butterfly handle, screwed down, screwed for iron pipe or for brass ferrule and fixed

M&L for Cutting the existing GI pipe upto 80mm for tapping of 15 mm branch including required fittings complete all as specified and as directed.

S&F epoxy insulators suitable of aluminium strip of 25x3mm size with nut bolts/ screws for fixing of copper/ aluminium / GI strips on stone / PCC block walls etc complete all as specified and directed.

M&L for earthing chamber of size 450x450x300 mm depth outside & 250x250x300 mm depth of PCC (1:3:6) type C1 complete all as specified and directed.

S&F in repair of earthing pit cover 50 mm thick precast slab of RCC 1:2:4 type B1, reinforced with welded steel wire fabric (XPM) weight not less than 4 Kg/sqm incl 6 mm dia bar handle complete all as specified and directed.

Supply and fixing of common salt for earthing complete all as specified and directed.

Supply and fixing of of magnesium sulphate for earthing complete all as specified and directed.

Supply and fixing of Charcoal for earthing complete all as specified and directed.

PAMS ENTERPRISES

M/S. Niksun Electro-Infra Private Limited

Star Electrical