PROVISION OF LIGHTENING ARRESTOR EARTH PITS-CONVENTIONAL AND CHEMICAL, SURGE PROTECTION DEVICE VOLTAGE STABILIZERS FOR VARIOUS LOCATION AND ALLIED WORK AT TECH AREA AT AIR FORCE STATION KALAIKUNDA UNDER GE (AF) KALAIKUNDA

Amount

Material & labour for earthing complete with copper earth plate electrode 600 mm x 600 mm x 3 mm thick burried directly in ground (Earth pit not less than 4 mtr deep below ground level) with top edge of the plate not less than 3.25 mtr below ground level connected to copper strip 20 x 3 mm as earth lead by brass nut bolts washer including brazing the copper strip with copper plate as shown in electrical plate No 3 connected to earth test point including necessary excavation for earth pit in hard dense soil, rocky / disintergate rock, filling charcoal and salt around the plate in layers , filling the pit with low resistivity agriculture soil free from stones, to be bring from out side defence land and mixed with Bentonite , (3 bags of 25 Kg each ), construction of inspection pit ( earth pit chamber) of brick work of size 600 x 600 x 600 mm with PCC copping of 1 :1.5: 3, 12.5 mm aggregate A1 with MS sheet 2.8 mm plate cover on frame of angle iron of size 40 x 40 x 5 mm with , wire mess, funnel, test point, 40 mm dia GI protection pipe light grade and 20 mm GI peforated pipe for watering etc complete and testing on completion. The electrode and lead shall be of copper all as specified and directed by Engr-in-charge (Copper strip upto 7.5 RM will be included in the item rate and copper strip beyond 7.5 RM will be measured seperately (Note : (i) Contractor shall use low reisistivity fresh agriculture soil , mixed with 3 x Bags of bentonite clay of 25 Kg each for refilling the pit to achive the desired resistance. (ii) copper strip will be laid below 60 cm from ground level and connected to test point through plinth protection (iii) Necessary cost of repair to plinth protection as per existing specification and connected plate and earth continuity conductor by providing 2 x brass nuts bolts and brazing of joints, bringing argiculture soil from out side defence land and cost of 3 x Bags of bentonite deemed to be included in the item rate. (iv) Contractor has to clear the side and disposed off the excavated soil from pit on completion of work. (v) Contractor has to submit test report of earthing after completing the earthing. (vi) Bentonite clay should be Conf to IS 6186: 1986. (vii) The cost of Copper strip of size 20X3 mm from top of earth plate upto 7.5 meter above ground level is deemed to be included in the unit rate of above item.and copper strip beyond 7.5 RM will be measured seperately. (viii). All the joints in copper strip and connection with Earth Plate to be welded through brazing and in addition by proving brass nut bolt and washer are deemed to be included in the unit rate. (viiii) Cost of brazing / welding and nut bolts are deemed to be included in the unit rate. (ix) Cost includes removal of excavated soil upto a distance of 100 mtrs.

Supply and fixing copper strip of size 20 x 3 mm as earth continuity conductor or main earthing lead fixed on "V" type porcelain insulator, 4 BM, heavy duty ( ceramic bus bar support insulator off white colour of suitable for mounting strip of 20 mm wide x 3 min thick) saddle to wall, buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 20 x 3 mm copper strip brazing to each joints and connected with by providing brass nut bolts and washer all as specified and directed by Engr in Charge. Note : Insulators shall be provided on every 50 cm. (Minimum 2 x insulators to be provided in every 1 x metre of strip and rate of the same deemed to included in quoated rates)

Supply and fixing aluminium strip of size 25 x 3 mm as earth continuity conductor or main earthing lead fixed on "V" type porcelain insulator, 4 BM, heavy duty ( ceramic bus bar support insulator off white colour of suitable for mounting strip of 20 mm wide x 3 min thick) saddle to wall, buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 20 x 3 mm copper strip brazing to each joints and connected with by providing brass nut bolts and washer all as specified and directed by Engr in Charge. Note : Insulators shall be provided on every 50 cm. (Minimum 2 x insulators to be provided in every 1 x metre of strip and rate of the same deemed to included in quoated rates)

Supply and fixing copper strip of size 32 x 6 mm as earth continuity conductor or main earthing lead fixed on "V" type porcelain insulator 10 BM heavy duty ( ceramic bus bar support insulator off white colour of min size of 36 mm width x 60 mm length with 36 mm width bus bar mounting base) saddle to wall, buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 20 x 3 mm copper strip brazing to each joints and connected with by providing brass nut bolts and washer all as specified and directed by Engr in Charge.Note : Insulators shall be provided on every 50 cm. (Minimum 2 x insulators shall be provided in every 1 x metre of strip deemed to be included in quoated rates)

Supply & Fixing for thermoplastic(polycarbonate) junction box for test point without terminal block of dimension 130 x 180 x 77 mm IP 66 halogen free and weather proof including four hexagonal anticorrosive screws for out door installation complete all as specified and directed by Engineer-in-Charge. Make : Hensel- Cat part No. KF 0600 H or as equivalent in Sintex.

M&L in repair for Test point terminal block made of gun metal or phosphorus bronze size 75 x 75 x 25 mm drilled and screwed incl 3 Nos 8mm dia 25mm long hexagonal head screws for fixing strips to test point including necessary fixing arrangement to fix test point terminal block in junction box complete all as specified and directed.

Material & labour GI tubing medium grade 40mm bore for fixing the air termination rods on top of pipe with necessary clamping arrangement and other fitting required .The GI pipe shall be embedded in PCC bed blocks and tied with Stainless steel wire rope for free stand alone of pipe compete all as directed. Note:- PCC bed blocks shall be measured and paid saperately under relevant item of BOQ.

Materials and Labour for plain cement concrete (1:3:6) Type C-2 using 40 mm graded aggregate in foundations, filling and mass concrete complete all as specified and directed.

M & L in repair Air termination, single pointed, copper rod 12mm dia and 300 mm long complete fixed on wall/roof including fittings and fixing arrangement all as specified and directed..

Supply and fixing stainless steel wire rope PVC insulated of minimum thickness 6 mm for holding GI pipe of 50/ 40 mm dia to stand straight vertical mounted with lightening arrester spike complete all specified and directed by Engineer -in-charge

Supply and fixing stainless steel wire rope clamp grip for rope clamping 'U' with nut bolts washer etc all as specified and directed by Engineer -in-charge

Supply and laying of HDPE pipe of pressure rating 10 kgf/sq.cm of size 25 mm dia for protection of copper earth strips with and including taking out unserviceable complete all as specified and directed

Material & labour in repairs PVC insulated, Single core flexible copper conductor cable, 1100 Volt, Conf to IS 694, ISI marked of size 70 Sqmm including fixing it on tower of 40 mtr height by providing GI strip clamp and also by using Heavy duty PVC tye from LA at top of tower to earthing pit on ground, and any other locations like on wall or laying on floor by providing saddles, including connecting terminals by providing copper lugs, brass nut and bolt with washer of suitable size as per site requirement to connect the cable complete all as specified and directed by Engineer in Charge.

Supply and fixing Brass Copper lightening arrester 9.2 mm diameter and 915 mm in length with 5 spikes and base plate 8.5 x 8.5 cm for building protection coverage of 45 degress from the top point 1.85 m all as specified and directed by Engineer in Charge.

Supply & fixing ESE LA (Early streamer emission lightning arrester) with 79 meter radius at 5 meter height with level 1 protection level as per NFC 17 192 : 2011 through OEM service complete all as specified and as directed. Make - True Power ATS TP-3 or equivalent. Note : CPRI type test certificate to be provided along with material, installation is to be done through OEM representative.

Supply & fixing GI Mast of size 50 mm dia with guy wire of 5 meter length along with all accessories like clamps, saddles, holding arrangements to fix the mast to the shed/structure at highest point such that the Air terminal at any height of structure complete all as specified and as directed.

Supply & fixing Analog Lightnng counter 6 digit as per OEM specification complete all as specified and as directed.

Supply & fixing test link bar with insulator and nut bolt as per OEM specification complete all as specified and as directed.

Material & labour for fabrication of display board for earth pit nos, lacation and periodical test results for power circuit earthing, machinary earthing ,lightening conductor earthing, made of MS sheet 3.0 mm thick sheet, rectangular welding on angle iron of 25 x25 x4 mm of 600 mm height from ground level 30 cm including fixing in PCC 1:2:4 with 20 cm X 20 cm X 20 cm (below ground level) grade aggregate foundation to be carried out at different location technical area/domestic area . Dimention of board shall be 30 cm X 25 cm. or any other dimention not more than 0.075 sq mtr of MS Board The instruction shall be written black painted board in white letters not less than 2 " size for all type of boards complete all as specified and dierected by the Engineer -in-charge Note : (a) All necessary MS sheet, aluminium screws and PCC works minimum M15 grade etc are deemed to be inclusive the rate quoted by the contractor (b) The matter to be write on board shall be collected from Engineer-in-charge..

M&L for Advance encapsulated compound based Marconite compound earthing maintenance free , with copper electrode of 88 mm dia (strip in pipe technology upgraded earthing system conforming IS 3043. The outer copper pipe shall be of 88 mm dia or manufacturer instruction and inner copper strip shall be of 25 x 3 mm respectively of 3 mtrs long with terminal size 50 x 6 mm . The annular space between the pipe and strip to be filled up with Compact fill (CF) (Crystalline Conductive) mixture. The job includes excavation of pit in any type of hard dense soil/ disinterigated rocky strata of size 1000 mm x 1000 mm x 3050 mm depth and taking out all excavated soil, lowering and placing copper electrode in centre of pit and filling of back fill marconite compound having excellent moisture retaining capacity in sourrounding of electrode in 300 mm dia all around the electrode( Min 4 bags of 25 Kg each of Marconite back fill compound per pit per unit to be fill or more quantity of BFC if required to achive less than one ohms). The remaining portion of earth pit to be filled with agriculture soil / black cotton soil free from stones etc to be bring from out side defence land . The earth pit should be provided with a FRP earth pit cover for protection and safe guard of terminals. The material of earth electrode should have good electrical conductivity & anti corrosion property in wide range of soil conditions. The job also include M & L for in PCC(1:2:4) type B1 around the FRP cover for support and foundation and colouring the PCC work with desired colour.complete all as specified and directed. NOTE: 1) The quantity of BFC indicated above is generally for normal/good soils.In case the soil resistivity is high , the quantity of BFC should be increased & cost of the same is deemed to be inclusive in the quoted rates. 2). If the desired earth resistance not obtained the earthing shall be re-done by contractor without any extra cost to Govt . 3). Removal of excavated soil and filling of agriculture soil brought from out side defence land shall be included in the overall rate quoted.

Make : Copper electrode : True Power Earthing Pvt Ltd. Model No. 80/3MTPPC (3 MTR Long, 80 mm dia) Product code CE -E-003 or equivelant make. Back fill compound : Marconite : Product of Carbon International Ltd. UK. "Marconite" electrically conductive aggregate, to be used as backfill to enhance the effect of earth electrode and suitable for rock and all type of ground condition having low resistivity up to 0.001 Ohm meter, inert PH material, Corrosion free green product in bag of 25 Kg each) Note :- (i) Design of earth electrode should be of Strip -in-pipe technology . (ii) Contractor have to submit literature of earth electrode and get the make approved of GE before procurement. (iii) The earth electrode shall be CPRI approved. (iv) Contarctor has to fill pure back fill compound all around the earth electrode in 300 mm bore up to full depth of bore. (v) Copper strip will be laid below 20 cm from ground level and connecting the test point through plinth protection using HDPE pipe for protection, necessary cost of repair to plinth protection and brazing and welding deemed to be included in the item. (vi) Contarctor shall submit the test report of earthing after completing the work of earthing. (vii) Contractor shall remove and disposed off the soil excavated from boring and clear the site before completion of work. (viii) Contractor has to submit the test certificate of electrode and back fill compound before claiming the payment. (ix).The cost of Copper strip of size 25X3 mm from top of earth plate upto 7.5 meter above ground level is deemed to be included in the unit rate of above item.and copper strip beyond 7.5 RM will be measured seperately.

M&L for maintenance free chemical earthing of UL Listed Copper bonded Solid Steel Rods are to be used as vertical electrode. These electrodes shall be made of high tensile low carbon steel rod, molecular bonded with 99.9% electrolytic copper with minimum bonding thickness of 254 microns - 25 mm dia copper bonded rod with minimum length of 3048 mm (10 ft as per UL) and as per IEC 62561-2. Universal clamp of required size should be made up of SS304. and inner copper strip shall be of 25 x 3 mm respectively of 3 mtrs long with terminal size 50 x 6 mm . The annular space between the pipe and strip to be filled up with Compact fill (CF) (Crystalline Conductive) mixture. The job includes excavation of pit in any type of hard dense soil/ disinterigated rocky strata of size 1000 mm x 1000 mm x 3050 mm depth and taking out all excavated soil, lowering and placing Copper bonded Solid Steel Rods in centre of pit and filling of back fill compound as per manufcaturer,s specification having excellent moisture retaining capacity in sourrounding of electrode in 120 mm dia all around the electrode( Min 1 bags of 25 Kg each of back fill compound per pit per unit to be fill or more quantity of BFC if required to achive less than one ohms). The remaining portion of earth pit to be filled with agriculture soil / black cotton soil free from stones etc to be bring from out side defence land . The earth pit should be provided with a FRP earth pit cover for protection and safe guard of terminals.Polypropelene Earth pit chamber of size 300x300x190mm. Earth enhancement compund of resistivity 0.018 ohm meter - 25kg should be used made graphite and carbon should be of conductive concrete based mineral compound producing low resistance of an earth termination system. Material of the earthing enhancing compound shall be chemically inert to subsoil. It shall not pollute the environment. Below test report should be submitted for Earth rod should be tested CPRI tested for 87.5 kA peak and 35 kA Irms for 1 sec and test reports for Marking, Dimension, Electrical resistance before and after salt mist test, tensile strength, bend test , adhesion test. The compound shall be tested and certified as per IEC 62561-7 and also fulfill Toxicity Characteristic Leaching Procedure (TCLP) requirements with and including M & L for in PCC(1:3:6) type C-1 around the FRP cover for support including TMT bar as per manufacturer,s instruction and foundation and colouring the PCC work with desired colour complete all as specified and directedcomplete all as specified and as directed. Make Cape or equivalent.

(i) Contractor have to submit literature of earth electrode and get the make approved of GE before procurement. (ii) Contractor has to bring agriculture soil from outside defence land and refill the earth pit. Cost of soil is deemed to be included in the item rate. (iii) Contarctor has to fill pure back fill compound all around the earth electrode in 125 mm bore up to full depth of bore. (iv) Copper strip will be laid below 20 cm from ground level and connecting the test point through plinth protection using HDPE pipe for protection, necessary cost of repair to plinth protection and brazing and welding deemed to be included in the item. (v) Contarctor shall submit the test report of earthing after satisfactorily completion. (vi) Contractor shall remove and disposed off the soil excavated from boring and clear the site before completion of work. (vii).The cost of Copper strip of size 25X3 mm from top of earth plate upto 7.5 meter above ground level is deemed to be included in the unit rate of above item.and copper strip beyond 7.5 RM will be measured seperately. vi) Contarctor shall submit the test report of earthing after satisfactorily completion. (viii) Cost includes disposal of excavated soil from site and clear the site before completion of work at that location.

M&L for Advance encapsulated compound based Chemical earthing CPRI tesed maintenance free , pipein -pipe technology upgraded (Zinc & Alloy coated). , Zinc & Alloy coated (80 -100) microns with pure zinc (99.9%) & Alloy coating (200-250)microns.Earthing system conforming IS 3034. The outer and inner pipe should be 76.2mm and 41.9mm dia respectively of 3 mtrs long zinc coated with with additional special alloy coating 300mm on top side for additional protection of the terminal . The annular space between the pipes to be filled up with Compactfill (CF) (Crystalline Conductive) mixture which should be machine pressed in the pipes not disintegrate or collapse when outer pipe corrodes. The inner pipe should be extended with terminals for connectivity.The job includes digging the pits in any type of soil of min size 1000 X 1000 X 3050mm depth taking out excavated soil,lowering the pipe in pipe earth electrode,filling of pure conductolite back filling compound (BFC Conductolite ) having excellent moisture retaining capacityminimum 4 bags of 25 KG per pit per unit in 300 mm around the electrode . Refiiling the pit with agriculture soil free from stones, to be bring from out side defence land as to get less resistance value. The BFC should be eco friendly it should not contain envernmently hazardous material/metal having ROHS certification from NABL accredited lab.The earth pit should be provided with a FRP earth pit cover for protection and safe guard of terminals. The material of earth electrode should have good electrical conductivity & anti corrosion property in wide range of soil conditions. The job also include M & L for in PCC(1:3:6) type C-1 around the FRP cover for support and foundation and colouring the PCC work with desired colourcomplete all as specified and directed. Make : ASHLOK ( Model ASEEL-39 AC 3 mtr length 76.3 mm dia Note :- (i) Design of earth electrode should be of pipein-pipe technology . (ii) Contractor have to submit literature of earth electrode and get the make approved of GE before procurement.(iii) The earth electrode shall be CPRI tested to withstand short current test for 60kA rms for 1.0 second and 150kA for peak current. (iv) Contractor has to fill/ pure back fill compound 300 mm all around the earth electrode up to full depth of pit.(v) Copper strip will be laid below 20 cm from ground level and connecting the test point through plinth protection using HDPE pipe for protection, necessary cost of repair to plinth protection and brazing and welding deemed to be included in the item.(vi) Contarctor shall submit the test report of earthing after satisfactorily completion. (vii) Cost includes disposal of excavated soil from site and clear the site before completion of work at that location.(viii) Contractor has to bring agriculture soil from outside defence land and refill the earth pit. Cost of soil is deemed to be included in the item rate (ix)he cost of Copper strip of size 25X3 mm from top of earth plate upto 7.5 meter above ground level is deemed to be included in the unit rate of above item.and copper strip beyond 7.5 RM will be measured seperately.

Supply and fixing Voltage stabilizer (Digital) for automatic operation, single phase indoor type & designed for input variation between 150 V to 290 V with output voltage stabilized at 230 V with accuracy of ± 2.5% and of capacity 12 Amp. for 1.5 Ton AC. Make - V- Guard, Model - VND 400 Digital / ITE Gurgaon or equivalent make as catered in ps.

Supply and fixing Voltage stabilizer (Digital) for automatic operation, single phase indoor type & designed for input variation between 130 V to 300 V with output voltage stabilized at 230 V with accuracy of ± 2.5% and of capacity 15 Amp. for 2 Ton AC. Make - V -Guard, Model - VGB 500 Digital/ ITE Gurgaon or equivalent make as catered in PS

Supply and fixing Voltage stabilizer (Digital) for automatic operation, single phase indoor type & designed for input variation between 90 V to 300 V with output voltage stabilized at 230 V with accuracy of ± 2.5% and of capacity 05 KVA. Make - Microtek, Model - EML 5090 / ITE Gurgaon or equivalent make as catered in PS

Supply and fixing Surge protection device (SPD) Type 1+2 AC TP+N (triple pole and neutral) 320 Uc(V), In 20KA to Imax 50KA upto 1.5 KV including suitable enclosure and installation in parallel connection in DB and making all electrical connection with 4 x 6 sqmm single core copper wire with copper lugs complete all as specified and as directed. Make- Havells, Cat No. DHSAANBC50320 or equivalent make as catered in PS

Supply and fixing Surge protection device (SPD) Type 1+2 AC 1P+N (Single pole and neutral) 320 Uc(V), In 20KA to Imax 50KA upto 1.5 KV including suitable enclosure and installation in parallel connection in DB and making all electrical connection with 2 x 6 sqmm single core copper wire with copper lugs complete all as specified and as directed. Make- Havells, Cat No. DHSAARAC50320 or equivalent make as catered in PS

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