REPAIR/REPLACEMENT OF DIFFERENT TYPE OF LIGHTNING CONDUCTOR, LIGHTNING ARRESTORS ALONG WITH CONNECTED ITEMS AT AF STATION SALUA UNDER GE (AF) KALAIKUNDA

M&L for refixing /reallingment of aluminium/GI/Copper strip in any size fixing on saddel type insulator using nut and bolt and washers reveting by aluminium revet for jointing to strip /laid in trench fix on surface or wall etc as site requirement making circuit continuity with making straight. Complete all as specified and directed. Note: Cost of insulator is included in Quoted rate .Porcelain type insulator and fixing screw shall be provided @2 nos per RM

Materials and Labour for Supply and installation & testing of fast copper bounded earth electrode maintenance free chemical earthing having 3 mtr long copper pipe of minimum diameter 76 mm. There should be terminal for connection of 20 mm x 3 mm of copper strip with two holes of 14 mm diameter. FAST ELECTRODE is duly fitted with the highly conductive material with sealing at both ends with lead terminals of 20x3 mm copper strip at top, BFC (Backfilling compund chemical), earth conductivity enhancing compound alongwith Minimum 6 bags of 25 Kgs each of earth enhancing compound, including drilling a bore in earth of dia 300 mm dia. The chemical should be tested and certified by any international accredited laboratory. The earthhencing compound should be tested referring to protocol IS 1350/&/EC62321/111/54/CDV. The PH value of compound should be between 7 to 8. The content of mercury (Hg) & Hexacromium should be below detection level. The FAST ELECTRODE shall be dully tested & Certified by CPRI (Central Power Reserch Institution), Govt of India for a suitable minimum short circuit current for 1 second with initial pick of suitable KA. The Fast ELECTRODE shall be approved by CPRI, ERDA/NABL Lab including pit cover light weight made out of high quality polymer with lid made of FRP, including nessary testings and commissioning, complete all as specified and as directed. Notes:- (i) The work of earthing shall be carried out by authorised trained rep of OEM.

S&F in replacement of Air termination, single pointed, copper rod 12mm dia and 300mm long complete all as specified.

Supply and fixing copper strip of size 20x3 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 32 x 6 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 and fixing Galvanised 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 32 x 6 mm cgalvanised 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)

S&F for Test Point junction box of suitable size with terminal block, IP 66 weather proof including four hexagonal anticorrisove screws for out door installation including provn of Test points as per IS specifications of shape and size 75x75x25 mm drilled and screwed incl 3 nos 8 mm dia 25 mm long hex head screw, made out of phospher bronze mounted and fixed on box with suitable grouting arrangements Suitable nut bolts, washers of various size as approved, complete duly fixed with ground/earth/roof conductor rigidly .

M&L for earthing complete with copper earth plate electrode 600x600x3mm thick buried directly in ground (Earth plate not less than 3.0 M in deep below ground level) with top edge of the plate not less than 2.4m below normal ground level connected to copper earth strip 20X3 mm by means of bolts, nuts, check nuts and washers of galvanized iron all as drected by Engr-in- Charge and connected to earthing test point all as specified and directed including necessary earth work in any type of strata and PCC 1:3:6 type B1 for chamber and RCC chamber cover 50mm thick in lieu of CI cover and copper strip protected by 40mm GI pipe light grade complete. Including filling of agriculture sand brought from out side defence land for earth pit as directed by Engineer-in-charge. Excavation and removal of excavated soil and filling of agriculture sand brought from out side defence land shall be included in the overall rate quated. No extra payment shall be paid. Note :- (a). The quoted rate includes the rate of Magnesium Sulphate of 40Kg per earth pit poured with salt and charcoal (To obtained earth resistance value and prepare test sheet of newly constructed earth pit shall be responsibility of contractor ) (b). If the desired earth resistance not obtained the earthing shall be re-done by contractor without any extra cost to Govt . (c) 40 mm dia light grade GI pipe for earth lead strip protection and earth strip up to 7.5 Mtr incl in quoted rates beyond that both are measured and paid separetely.

Supply & fixing ESE LA Advanced type Early Streamer Emission type TP Lightning Protection complete with the Lightning Air Terminal- safe lightning protection rod having protection radius of minimum 79 mtr. The Insulation material used to electrically isolate the panels & shall be comprised of abased Stainless Steel which provides high Ozone & UV resistance with a di-electric strength of 24-38KV/mm tested as per NFC 17-102, UNE 21186, IEC 60-1:1989, NP 4426:2013.The ESE TP ATS Terminal shall be tested and certified by CPRI ,Govt. Of India for the impulse current of 71KA(8/20 micro sec) with 5 positive and 5 negative impulse & international test LAB [except China]. The material also must be tested at the impulse current of 100+ kA [10/350ms] at deltaT=60 ms. The ESE Air Terminal with offer a Protection Radius of 79 Meters at level 1 & 107 mtr at level 4 at a height of 6mtr*50mm GI mast as per NFC 17 102(Calculation). EPOXY type insulator must be present in between mast & Air terminal, including guy wire as required, mast coupler and SLPR accessories complete all as specified and as directed.

Supply and fixing digital Lghtning Impulse Counter Electromechanical 6 digit with IP65 protection strike counter for counting the no of strikes arrested by the Lightning Arrester all as specified and directed by Engineer in Charge.

Supply and fixing 70 Sqmm single core flexible copper cable for connection of ESE air terminal. complete all as specified and directed.